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Analysis

  • max time kernel
    145s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/02/2024, 18:32

General

  • Target

    2024-02-19_b822f3057def84b9dd03792bfaf60a7e_cryptolocker.exe

  • Size

    29KB

  • MD5

    b822f3057def84b9dd03792bfaf60a7e

  • SHA1

    cd5f78c64d230f20970224ae87130127e96451e1

  • SHA256

    32ca5329a2021e1117b7c1be86622273c560baebcc4395441c30cfdcc3295c6a

  • SHA512

    8dfcf2710bb122b30405808eca7b71f2a006e61f69fbce280a68f7c6601e66cbaa0efa0560e037faa5c339b0e25a641fe7075f67cabef2d35ca34e321badad59

  • SSDEEP

    768:q0ZziOWwULueOSdE8tOOtEvwDpjeWaJIO/xC:q0zizzOSxMOtEvwDpj/arI

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 IoCs
  • UPX dump on OEP (original entry point) 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\2024-02-19_b822f3057def84b9dd03792bfaf60a7e_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-19_b822f3057def84b9dd03792bfaf60a7e_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2072
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4408

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    30KB

    MD5

    402b10f8bc3fec06bf039756506a7e97

    SHA1

    883e9bc89c0eb2375e1ee36c19d0f0248ce4b5e0

    SHA256

    9e262283c15feb03dce1b2d45cce203638ea49191f3ba040611d832a371c336e

    SHA512

    a727b872075327e6fc25715991b606556104f0ceabfb81c31d3ba3c372e64aa040068c097814626d52e73fc0c6a2063769e6513af5dbd8aa8b06557ed743374c

  • memory/2072-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2072-1-0x0000000000560000-0x0000000000566000-memory.dmp

    Filesize

    24KB

  • memory/2072-2-0x0000000000560000-0x0000000000566000-memory.dmp

    Filesize

    24KB

  • memory/2072-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/2072-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4408-21-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/4408-19-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/4408-26-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB