Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/02/2024, 01:51

General

  • Target

    2024-02-29_bef55fce1acb2eea06f66656795b4006_cryptolocker.exe

  • Size

    68KB

  • MD5

    bef55fce1acb2eea06f66656795b4006

  • SHA1

    6019343f86127e7571406d337a594a127a46191b

  • SHA256

    1ccf5ca34e65d196345c64823298f73617d6da77222eecd3a528fe908b010ffe

  • SHA512

    98acd8639d56531feee1c38e76b6b74279f9d6001af24cd7ca2b522f6818f32baf85dc11f915e4138c2ac4a0016a8009a87a9a22b5282bc795f6bfda034024ab

  • SSDEEP

    1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKUx:DW60sllyWOtEvwDpjwF85/

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • Checks computer location settings 2 TTPs 1 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-29_bef55fce1acb2eea06f66656795b4006_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-29_bef55fce1acb2eea06f66656795b4006_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1544
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:2136

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    68KB

    MD5

    810143f49139794e670361ca5f1910b3

    SHA1

    932053a2e103240752fc0fba4904cd888a14c856

    SHA256

    9ee7bfd0c409aae92fa6fcf4e4025129b8f3d993a4ca2ece01e6c03be34358d2

    SHA512

    c57f67be98374ca5794497f0a4cc1f2d02ee2fed69ab4462d7e393957534eef1a747554d48661f0bf853d26edff795e875eb9fdeae33c279c3c55728c3010528

  • memory/1544-0-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/1544-1-0x0000000000740000-0x0000000000746000-memory.dmp

    Filesize

    24KB

  • memory/1544-2-0x0000000000740000-0x0000000000746000-memory.dmp

    Filesize

    24KB

  • memory/1544-3-0x0000000000760000-0x0000000000766000-memory.dmp

    Filesize

    24KB

  • memory/1544-17-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/2136-18-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/2136-22-0x0000000000730000-0x0000000000736000-memory.dmp

    Filesize

    24KB

  • memory/2136-20-0x0000000000750000-0x0000000000756000-memory.dmp

    Filesize

    24KB