Analysis

  • max time kernel
    151s
  • max time network
    134s
  • platform
    windows7_x64
  • resource
    win7-en-20211014
  • submitted
    09-11-2021 13:39

General

  • Target

    87726003343d1e14d3095bcdd372f4a3.exe

  • Size

    729KB

  • MD5

    87726003343d1e14d3095bcdd372f4a3

  • SHA1

    da2823d54ca0d6509d9f952d324e07d267ee1ed0

  • SHA256

    038152eae96d57cb15d542b84755d9feadee7d2012fc183a1937c448c211671e

  • SHA512

    9eada47d8b570bf15d5a3bcdb7e5946d5c1143856af64cb0fe417036fac9d1a30c15dc4df7a725bfa3fa9241bcaa4161b7bb12653bb94d8d50d7b5700f6c8c67

Malware Config

Signatures

  • Modifies Windows Defender Real-time Protection settings 3 TTPs
  • suricata: ET MALWARE Win32/Unk.HRESQ! MultiDownloader Checkin

    suricata: ET MALWARE Win32/Unk.HRESQ! MultiDownloader Checkin

  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\87726003343d1e14d3095bcdd372f4a3.exe
    "C:\Users\Admin\AppData\Local\Temp\87726003343d1e14d3095bcdd372f4a3.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1544
    • C:\Users\Admin\Pictures\Adobe Films\ciw_F3w_e6F6z3AxxnLnXAW8.exe
      "C:\Users\Admin\Pictures\Adobe Films\ciw_F3w_e6F6z3AxxnLnXAW8.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      PID:564
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1544 -s 1408
      2⤵
      • Program crash
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:848

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\Pictures\Adobe Films\ciw_F3w_e6F6z3AxxnLnXAW8.exe

    MD5

    3f22bd82ee1b38f439e6354c60126d6d

    SHA1

    63b57d818f86ea64ebc8566faeb0c977839defde

    SHA256

    265c2ddc8a21e6fa8dfaa38ef0e77df8a2e98273a1abfb575aef93c0cc8ee96a

    SHA512

    b73e8e17e5e99d0e9edfb690ece8b0c15befb4d48b1c4f2fe77c5e3daf01df35858c06e1403a8636f86363708b80123d12122cb821a86b575b184227c760988f

  • \Users\Admin\Pictures\Adobe Films\ciw_F3w_e6F6z3AxxnLnXAW8.exe

    MD5

    3f22bd82ee1b38f439e6354c60126d6d

    SHA1

    63b57d818f86ea64ebc8566faeb0c977839defde

    SHA256

    265c2ddc8a21e6fa8dfaa38ef0e77df8a2e98273a1abfb575aef93c0cc8ee96a

    SHA512

    b73e8e17e5e99d0e9edfb690ece8b0c15befb4d48b1c4f2fe77c5e3daf01df35858c06e1403a8636f86363708b80123d12122cb821a86b575b184227c760988f

  • memory/564-58-0x0000000000000000-mapping.dmp

  • memory/848-60-0x0000000000000000-mapping.dmp

  • memory/848-61-0x0000000000210000-0x00000000002CD000-memory.dmp

    Filesize

    756KB

  • memory/1544-55-0x0000000075BA1000-0x0000000075BA3000-memory.dmp

    Filesize

    8KB

  • memory/1544-56-0x0000000003DE0000-0x0000000003F2C000-memory.dmp

    Filesize

    1.3MB