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.

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.mlwpath: /opt/CAPEv2/storage/binaries/230722cf056cb6adcc3a04bc913f862a9306c7195007e8dc6375c32de2790291crc32: 489D74C9md5: a3032e2ab998c14abde0ef828f73b029sha1: 074418fe02bb299ffd20f57a2e24cc10b6b704c7sha256: 230722cf056cb6adcc3a04bc913f862a9306c7195007e8dc6375c32de2790291sha512: 8778452981608ffce247bee16eeccffbe4852cd5ff539daa272374c88debe45e84116f0207b1e334669a534a5419bc5255f3f0083670f97c7e9b0859b926a13fssdeep: 6144:4TCu8mgqerv8oRrlHLgjB0YIdRVgZIz6lGAUwmZB3NhATAU5G6Db2agJmf/1TekU:4TC/G+U2rlrqOTrVx7AXmjgDaG/p8oMtype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T1C7A42352D59DD9A5C40CD7331788E673FAFDA486AC05863183697E3EFDE82C8986B060sha3_384: 912c2f27624cc913746a577a652fa2a3b2cfe15dd76d5db45297c8f8755208178c6d68ec31624b612e6fb84ad11ed489ep_bytes: 60e803000000e9eb045d4555c3e80100timestamp: 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.