Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/05/2024, 02:42

General

  • Target

    2024-05-26_c4170eff6970be4ddbde1629352c4178_cryptolocker.exe

  • Size

    78KB

  • MD5

    c4170eff6970be4ddbde1629352c4178

  • SHA1

    f40b711da0273da30fa6affe24e5f6253e315a92

  • SHA256

    85aad8595e502678e159e83345ba1e59df3a039f171d2287f5c416b4fa42bd7c

  • SHA512

    8d07d67ab06baa6040c41ffcb284e95e837ed4b9fa3a4c795e224443ae22f0f32ffe5a21de5d7717cae905519b46c82288ead7bf893360287aebb9b431995255

  • SSDEEP

    1536:vj+jsMQMOtEvwDpj5HwYYTjipvF2hBfIuf4:vCjsIOtEvwDpj5H9YvQd2c

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\2024-05-26_c4170eff6970be4ddbde1629352c4178_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-26_c4170eff6970be4ddbde1629352c4178_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2920
    • 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:4800

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    78KB

    MD5

    c8d4b3e4e2cae468c093b81814a6617e

    SHA1

    b410d85da2cdc3098f35646f6d60c82cd8468eee

    SHA256

    2d034bf956f20df54dfb07e4ab5e5c8be13f6a8486ee4b2b9f438d3b6fc2a8ef

    SHA512

    66b13bf654f48632ba951fa248e4a3a38d6443ff24e32353fced4cacf0fe323e45b0746401090c718e242173f7726f65daf7b18f943e7b4fa51c5da90da38c5f

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2920-0-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/2920-8-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/2920-1-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/4800-18-0x0000000000860000-0x0000000000866000-memory.dmp

    Filesize

    24KB

  • memory/4800-23-0x0000000000840000-0x0000000000846000-memory.dmp

    Filesize

    24KB