Trojan.StartPage.COWbaKxDZumb (file analysis)

The Trojan.StartPage.COWbaKxDZumb is considered dangerous by lots of security experts. When this infection is active, you may notice unwanted processes in Task Manager list. In this case, it is adviced to scan your computer with GridinSoft Anti-Malware.

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What Trojan.StartPage.COWbaKxDZumb virus can do?

• Behavioural detection: Executable code extraction – unpacking
• SetUnhandledExceptionFilter detected (possible anti-debug)
• Executed a command line with /C or /R argument to terminate command shell on completion which can be used to hide execution
• Yara rule detections observed from a process memory dump/dropped files/CAPE
• Creates RWX memory
• Anomalous file deletion behavior detected (10+)
• Dynamic (imported) function loading detected
• Performs HTTP requests potentially not found in PCAP.
• HTTPS urls from behavior.
• Enumerates running processes
• Expresses interest in specific running processes
• Repeatedly searches for a not-found process, may want to run with startbrowser=1 option
• Attempts to modify Internet Explorer’s start page
• CAPE extracted potentially suspicious content
• Unconventionial language used in binary resources: Chinese (Simplified)
• The binary contains an unknown PE section name indicative of packing
• Executable file is packed/obfuscated with ASPack
• The binary likely contains encrypted or compressed data.
• Authenticode signature is invalid
• Uses Windows utilities for basic functionality
• Behavioural detection: Injection (inter-process)
• Creates or sets a registry key to a long series of bytes, possibly to store a binary or malware config
• Attempts to modify proxy settings

How to determine Trojan.StartPage.COWbaKxDZumb?

File Info:
name: A3032E2AB998C14ABDE0.mlw
path: /opt/CAPEv2/storage/binaries/230722cf056cb6adcc3a04bc913f862a9306c7195007e8dc6375c32de2790291
crc32: 489D74C9
md5: a3032e2ab998c14abde0ef828f73b029
sha1: 074418fe02bb299ffd20f57a2e24cc10b6b704c7
sha256: 230722cf056cb6adcc3a04bc913f862a9306c7195007e8dc6375c32de2790291
sha512: 8778452981608ffce247bee16eeccffbe4852cd5ff539daa272374c88debe45e84116f0207b1e334669a534a5419bc5255f3f0083670f97c7e9b0859b926a13f
ssdeep: 6144:4TCu8mgqerv8oRrlHLgjB0YIdRVgZIz6lGAUwmZB3NhATAU5G6Db2agJmf/1TekU:4TC/G+U2rlrqOTrVx7AXmjgDaG/p8oM
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T1C7A42352D59DD9A5C40CD7331788E673FAFDA486AC05863183697E3EFDE82C8986B060
sha3_384: 912c2f27624cc913746a577a652fa2a3b2cfe15dd76d5db45297c8f8755208178c6d68ec31624b612e6fb84ad11ed489
ep_bytes: 60e803000000e9eb045d4555c3e80100
timestamp: 2013-03-19 12:53:53

Version Info:
0: [No Data]

Trojan.StartPage.COWbaKxDZumb also known as:

How to remove Trojan.StartPage.COWbaKxDZumb?

• Download and install GridinSoft Anti-Malware.
• Open GridinSoft Anti-Malware and perform a “Standard scan“.
• “Move to quarantine” all items.
• Open “Tools” tab – Press “Reset Browser Settings“.
• Select proper browser and options – Click “Reset”.
• Restart your computer.