Worm.Win32.AutoItGen_6bb1b89767

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

The Worm creates the following process(es):

temp.exe:236
%original file name%.exe:372
netsh.exe:468

The Worm injects its code into the following process(es):

chrmoe.exe:484

File activity

The process temp.exe:236 makes changes in the file system.

The Worm creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Application Data\chrmoe.exe (44 bytes)

The process %original file name%.exe:372 makes changes in the file system.

The Worm creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\aut1.tmp (980 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\temp.exe (1960 bytes)

The Worm deletes the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\aut1.tmp (0 bytes)

The process chrmoe.exe:484 makes changes in the file system.

The Worm creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Start Menu\Programs\Startup\0fd8acc869677e5e65229aa12bdc019b.exe (440 bytes)

Registry activity

The process temp.exe:236 makes changes in the system registry.

The Worm creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "6D B1 95 6D F5 5C 6E BB 05 87 23 8A 8D 56 3E C5"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cookies" = "%Documents and Settings%\%current user%\Cookies"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Documents" = "%Documents and Settings%\All Users\Documents"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Documents and Settings%\%current user%\Application Data]
"chrmoe.exe" = "chrmoe"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Desktop" = "%Documents and Settings%\%current user%\Desktop"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{b98117e8-75ca-11e2-81b2-000c293708fb}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\0fd8acc869677e5e65229aa12bdc019b]
"US" = "@"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Desktop" = "%Documents and Settings%\All Users\Desktop"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"

[HKCU\Environment]
"SEE_MASK_NOZONECHECKS" = "1"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Personal" = "%Documents and Settings%\%current user%\My Documents"

The Worm modifies IE settings for security zones to map all web-nodes that bypassing the proxy to the Intranet Zone:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"ProxyBypass" = "1"

The Worm modifies IE settings for security zones to map all urls to the Intranet Zone:

"IntranetName" = "1"

The Worm modifies IE settings for security zones to map all local web-nodes with no dots which do not refer to any zone to the Intranet Zone:

"UNCAsIntranet" = "1"

The process %original file name%.exe:372 makes changes in the system registry.

The Worm creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "0B 05 85 56 BA EF 10 1C 4B 02 5D B0 C2 FC 9E 58"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{b98117e8-75ca-11e2-81b2-000c293708fb}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

The process chrmoe.exe:484 makes changes in the system registry.

The Worm creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "AC 72 73 5D 0E 49 EE 55 4D 2D 1D 30 6E A3 39 96"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Startup" = "%Documents and Settings%\%current user%\Start Menu\Programs\Startup"

"AppData" = "%Documents and Settings%\%current user%\Application Data"
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"

To automatically run itself each time Windows is booted, the Worm adds the following link to its file to the system registry autorun key:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"0fd8acc869677e5e65229aa12bdc019b" = "%Documents and Settings%\%current user%\Application Data\chrmoe.exe .."

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"0fd8acc869677e5e65229aa12bdc019b" = "%Documents and Settings%\%current user%\Application Data\chrmoe.exe .."

The process netsh.exe:468 makes changes in the system registry.

The Worm creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappprxy\traceIdentifier]
"Guid" = "5f31090b-d990-4e91-b16d-46121d0255aa"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\qagent]
"Active" = "1"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\QUtil\traceIdentifier]
"Guid" = "8aefce96-4618-42ff-a057-3536aa78233e"

[HKLM\SOFTWARE\Microsoft\Tracing\FWCFG]
"MaxFileSize" = "1048576"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\NAP\Netsh]
"ControlFlags" = "1"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\qagent]
"ControlFlags" = "1"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\NAP\Netsh]
"Active" = "1"

[HKLM\SOFTWARE\Microsoft\Tracing\FWCFG]
"ConsoleTracingMask" = "4294901760"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\NAP\Netsh\Napmontr]
"BitNames" = " NAP_TRACE_BASE NAP_TRACE_NETSH"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappprxy]
"Active" = "1"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappcfg\traceIdentifier]
"BitNames" = " Error Unusual Info Debug"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappcfg]
"Active" = "1"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappprxy\traceIdentifier]
"BitNames" = " Error Unusual Info Debug"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappcfg]
"ControlFlags" = "1"

[HKLM\SOFTWARE\Microsoft\Tracing\FWCFG]
"EnableFileTracing" = "0"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappcfg]
"LogSessionName" = "stdout"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\NAP\Netsh\Napmontr]
"Guid" = "710adbf0-ce88-40b4-a50d-231ada6593f0"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\QUtil]
"Active" = "1"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappprxy]
"LogSessionName" = "stdout"
"ControlFlags" = "1"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\qagent\traceIdentifier]
"Guid" = "b0278a28-76f1-4e15-b1df-14b209a12613"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\eappcfg\traceIdentifier]
"Guid" = "5f31090b-d990-4e91-b16d-46121d0255aa"

[HKLM\SOFTWARE\Microsoft\Tracing\FWCFG]
"EnableConsoleTracing" = "0"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\QUtil\traceIdentifier]
"BitNames" = " Error Unusual Info Debug"

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "C9 60 6A FA 26 DE FA 4D E3 6F 00 CE EA 0A FC 4C"

[HKLM\SOFTWARE\Microsoft\Tracing\FWCFG]
"FileDirectory" = "%windir%\tracing"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\QUtil]
"LogSessionName" = "stdout"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\qagent]
"LogSessionName" = "stdout"

[HKLM\SOFTWARE\Microsoft\Tracing\FWCFG]
"FileTracingMask" = "4294901760"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\NAP\Netsh]
"LogSessionName" = "stdout"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\qagent\traceIdentifier]
"BitNames" = " Error Unusual Info Debug"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Tracing\Microsoft\QUtil]
"ControlFlags" = "1"

Adds a rule to the firewall Windows which allows any network activity:

[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\%Documents and Settings%\%current user%\Application Data]
"chrmoe.exe" = "%Documents and Settings%\%current user%\Application Data\chrmoe.exe:*:Enabled:chrmoe.exe"

Dropped PE files

MD5	File path
3348b2d34d82b33cf476f6562e877d3d	c:\Documents and Settings\"%CurrentUserName%"\Application Data\chrmoe.exe
3348b2d34d82b33cf476f6562e877d3d	c:\Documents and Settings\"%CurrentUserName%"\Local Settings\Temp\temp.exe
3348b2d34d82b33cf476f6562e877d3d	c:\Documents and Settings\"%CurrentUserName%"\Start Menu\Programs\Startup\0fd8acc869677e5e65229aa12bdc019b.exe

HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Propagation

Removals

Remove it with Ad-Aware

1. Click (here) to download and install Ad-Aware Free Antivirus.
2. Update the definition files.
3. Run a full scan of your computer.

Manual removal*

1. Terminate malicious process(es) (How to End a Process With the Task Manager):

   temp.exe:236
   %original file name%.exe:372
   netsh.exe:468

2. Delete the original Worm file.
   
3. Delete or disinfect the following files created/modified by the Worm:

   %Documents and Settings%\%current user%\Application Data\chrmoe.exe (44 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\aut1.tmp (980 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\temp.exe (1960 bytes)
   %Documents and Settings%\%current user%\Start Menu\Programs\Startup\0fd8acc869677e5e65229aa12bdc019b.exe (440 bytes)

4. Delete the following value(s) in the autorun key (How to Work with System Registry):

   [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   "0fd8acc869677e5e65229aa12bdc019b" = "%Documents and Settings%\%current user%\Application Data\chrmoe.exe .."
   
   [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   "0fd8acc869677e5e65229aa12bdc019b" = "%Documents and Settings%\%current user%\Application Data\chrmoe.exe .."

5. Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
   
6. Reboot the computer.
   

*Manual removal may cause unexpected system behaviour and should be performed at your own risk.

Static Analysis

VersionInfo

Company Name:
Product Name:
Product Version:
Legal Copyright:
Legal Trademarks:
Original Filename:
Internal Name:
File Version:
File Description:
Comments:
Language: English (United States)

Company Name: Product Name: Product Version: Legal Copyright: Legal Trademarks: Original Filename: Internal Name: File Version: File Description: Comments: Language: English (United States)

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	4096	573044	573440	4.63126	74af66fa540568c59b3868e78900e476
.rdata	577536	182122	182272	4.0072	576c856afaad699ad9fe099fc6a9ce33
.data	761856	40756	25088	1.38934	e6d2e204147f7cdc3055011093632f54
.rsrc	802816	43852	44032	4.97149	ced97c129c8f3b48c3bc99880d67744f
.reloc	847872	42082	42496	3.63105	c2f6ddaeef894b7510c3be928eeae5dd

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Network Activity

URLs

URL	IP
google212.no-ip.biz	37.237.152.57

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

Map

Strings from Dumps