Analysis

  • max time kernel
    142s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-01-2024 01:57

General

  • Target

    2024-01-24_f1cc097bdde29d43313b4fc181a9e7e1_cryptolocker.exe

  • Size

    88KB

  • MD5

    f1cc097bdde29d43313b4fc181a9e7e1

  • SHA1

    e0b3e7f31da360db78e905d9edad53183eaedeb5

  • SHA256

    48901033fb9f0b3efefc666c62fdecb26850188f73ae856665bf7219f55df1a1

  • SHA512

    01d2c5d369771d903f53eaa99dcb807c8cd4664c5fd92985852fb20d7f1cbb64983e0fbccbc32e7b14fbbf863a3b17cd169c6de046082bd1d5c9896c9f67d9b6

  • SSDEEP

    1536:vj+jsMQMOtEvwDpj5H8u8rBN6nqEZNi1OkQN8:vCjsIOtEvwDpj5H8zPs4

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\2024-01-24_f1cc097bdde29d43313b4fc181a9e7e1_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-24_f1cc097bdde29d43313b4fc181a9e7e1_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4836
    • 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:2788

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    88KB

    MD5

    119996a8cdfb27c945cb69a38028b1d6

    SHA1

    1c42f4972927842d7489d0628cb95f6780e5b760

    SHA256

    cef7a6859d608967c01d9e387a20972cc70fbbf1d8f8ffc43b6fadccd06be7bb

    SHA512

    42910628f4b87a28fe8888b36d0c635126eb2f73ed793f80b43da637d51d806ab07f34353048fad963659af4b3e8ac682f1374b993778eda8b115922888a0633

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2788-17-0x0000000000510000-0x0000000000516000-memory.dmp

    Filesize

    24KB

  • memory/2788-20-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/4836-0-0x0000000002190000-0x0000000002196000-memory.dmp

    Filesize

    24KB

  • memory/4836-1-0x0000000002190000-0x0000000002196000-memory.dmp

    Filesize

    24KB

  • memory/4836-2-0x0000000002250000-0x0000000002256000-memory.dmp

    Filesize

    24KB