Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/05/2024, 21:07

General

  • Target

    2024-05-21_134b881ab6806ae46d7e1d67fdb49955_cryptolocker.exe

  • Size

    77KB

  • MD5

    134b881ab6806ae46d7e1d67fdb49955

  • SHA1

    a6ece1bf7ca06cb5691b131253660d0e099c147e

  • SHA256

    81ff7f87f20671acbb78d30baaa77278b34753089f0020d5a918607c78235006

  • SHA512

    edcaf7ecfdf29aa3f1ff77cbdb2fcc65b6cbaf9b56ff6fc35a04640f79869ed4b878352dfb72bc2122eb9941707d8bc227cabb0cb2cdb8b310777e76f481eb59

  • SSDEEP

    1536:vj+jsMQMOtEvwDpj5HwYYTjipvF2hBfIufl:vCjsIOtEvwDpj5H9YvQd2R

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 1 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\2024-05-21_134b881ab6806ae46d7e1d67fdb49955_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_134b881ab6806ae46d7e1d67fdb49955_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1532
    • 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:4728

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    77KB

    MD5

    9ba81438d912286bbdcf47b73d428c79

    SHA1

    f87bb280363ca4b9592c65f74e16806335cb235f

    SHA256

    c5544098a29d68f17727697775a839f6b32809387cc1a2ec396e254b9a77575c

    SHA512

    3cb5f087b0c954979df9966e8ac220430820b37866984cd5bbafa484c235a9af3bb0edbfc88f808ad36f57a4be4c1bdaf0d1000fbcf22ad88c864f40eab5a5c5

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1532-0-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/1532-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/1532-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/4728-17-0x0000000002110000-0x0000000002116000-memory.dmp

    Filesize

    24KB

  • memory/4728-23-0x0000000000570000-0x0000000000576000-memory.dmp

    Filesize

    24KB