Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/03/2024, 15:45

General

  • Target

    2024-03-05_e75651e367431c84a0c31e25f235aec6_cryptolocker.exe

  • Size

    81KB

  • MD5

    e75651e367431c84a0c31e25f235aec6

  • SHA1

    161666092db779c4b016235443d2047bf5bf22d8

  • SHA256

    349c80bc7011cc283dc6d024b237712c88682f8262e87d8f8dc35c29e7c9a5c2

  • SHA512

    1efe82ff6caa32cbc00a0016c80093f6aa4a98680e89d861899465582a227e123c662472ff9272812c7ff22d39c1fd5a0d263db7767771d8fdb658141eea3ffe

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2EMM2:TCjsIOtEvwDpj5HE/OUHnSMk

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-03-05_e75651e367431c84a0c31e25f235aec6_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-05_e75651e367431c84a0c31e25f235aec6_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2792
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system certificate store
      PID:1556

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\misid.exe

    Filesize

    81KB

    MD5

    ae50a4b84a38f191615d7d22bd1fdb6f

    SHA1

    1122141042c289db78487e62d607c9ac8719017a

    SHA256

    ada71f66254b46ef1e1123d54c2665eddb2c349c42dd06b250908aaef3307d35

    SHA512

    b65e560bcd82d3c6b60e53d24c5dbf76cfe6f79e5b68f849e0d49cce6d32006de781077367a7d6ee98edbba3bb8b65fe8988b162813914d6a266d7a8f5e5d3d2

  • C:\Users\Admin\AppData\Local\Temp\misids.exe

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1556-19-0x0000000002080000-0x0000000002086000-memory.dmp

    Filesize

    24KB

  • memory/1556-21-0x0000000002060000-0x0000000002066000-memory.dmp

    Filesize

    24KB

  • memory/1556-48-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/2792-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/2792-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/2792-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/2792-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

    Filesize

    24KB

  • memory/2792-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB