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Analysis

  • max time kernel
    155s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/11/2022, 03:22

General

  • Target

    c04a2b4326fb00c59056100a6fd47b84ca026e4a7cd737a517183b959e27999a.exe

  • Size

    308KB

  • MD5

    0f53a0fd64fb5846e9fb7a4d46351f44

  • SHA1

    5b1338e737a5eafeadfdad442b34ebb9ec4a6c14

  • SHA256

    c04a2b4326fb00c59056100a6fd47b84ca026e4a7cd737a517183b959e27999a

  • SHA512

    2799edafd745316be2f079ad749533f3f4b4fa2e2d83fcb7603cff1048237a56e5705f6b6d22f4612cad273b8c57d1cc7f8a51eeda3d55c3e0f35a818fd96da1

  • SSDEEP

    6144:1i0EDc6DTmfihzwoLApr8E8bHTTlK+effWfmqkE0d3:1RT6nfi8bHTCffWuCo

Score
10/10

Malware Config

Signatures

  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Adds Run key to start application 2 TTPs 29 IoCs
  • Maps connected drives based on registry 3 TTPs 4 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c04a2b4326fb00c59056100a6fd47b84ca026e4a7cd737a517183b959e27999a.exe
    "C:\Users\Admin\AppData\Local\Temp\c04a2b4326fb00c59056100a6fd47b84ca026e4a7cd737a517183b959e27999a.exe"
    1⤵
    • Modifies visiblity of hidden/system files in Explorer
    • Checks computer location settings
    • Adds Run key to start application
    • Maps connected drives based on registry
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1944
    • C:\Users\Admin\welih.exe
      "C:\Users\Admin\welih.exe"
      2⤵
      • Modifies visiblity of hidden/system files in Explorer
      • Executes dropped EXE
      • Adds Run key to start application
      • Maps connected drives based on registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      PID:4652
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:1472

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\welih.exe

      Filesize

      308KB

      MD5

      0f53a0fd64fb5846e9fb7a4d46351f44

      SHA1

      5b1338e737a5eafeadfdad442b34ebb9ec4a6c14

      SHA256

      c04a2b4326fb00c59056100a6fd47b84ca026e4a7cd737a517183b959e27999a

      SHA512

      2799edafd745316be2f079ad749533f3f4b4fa2e2d83fcb7603cff1048237a56e5705f6b6d22f4612cad273b8c57d1cc7f8a51eeda3d55c3e0f35a818fd96da1

    • C:\Users\Admin\welih.exe

      Filesize

      308KB

      MD5

      0f53a0fd64fb5846e9fb7a4d46351f44

      SHA1

      5b1338e737a5eafeadfdad442b34ebb9ec4a6c14

      SHA256

      c04a2b4326fb00c59056100a6fd47b84ca026e4a7cd737a517183b959e27999a

      SHA512

      2799edafd745316be2f079ad749533f3f4b4fa2e2d83fcb7603cff1048237a56e5705f6b6d22f4612cad273b8c57d1cc7f8a51eeda3d55c3e0f35a818fd96da1