Analysis

  • max time kernel
    93s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/04/2024, 00:31

General

  • Target

    2024-04-06_42fb798aa18c679050fa0c180549d3f2_cryptolocker.exe

  • Size

    62KB

  • MD5

    42fb798aa18c679050fa0c180549d3f2

  • SHA1

    e45df1b0f232cdc5bbcb951e32e7ac4684e84be1

  • SHA256

    43eb255b1fadb710f52cef59c1012c20c10af2c01c71690b546e3b0b8fb2b92f

  • SHA512

    107f785d56e3cdfcde3c1a729aebaeaf1b2fa13af30d5f028a5eb72aa0cc3465cd3be20d11c1afea01d2664b09d3523d1804bcadde778f043602616f0763b549

  • SSDEEP

    768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mLZ5Siu:zj+soPSMOtEvwDpj4kpmeLmNu

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • UPX dump on OEP (original entry point) 5 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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\2024-04-06_42fb798aa18c679050fa0c180549d3f2_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-06_42fb798aa18c679050fa0c180549d3f2_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3788
    • 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:3656

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    63KB

    MD5

    aee37d78b8a04a81927aa50f5553a835

    SHA1

    85215379f19db0019788247492880f60cac8c52b

    SHA256

    c0a23e0ce685e45fc1ea7be986939288ce4536024e7e623aad2fbaad1207c4b6

    SHA512

    bd42c69fac75125cdd0822fed1c0f1c2f3eb757b295eae054f98c3c8f13b5e5f9a0263fe8593cb303d62c5d50b75109573ec337857190c42e3d9a6676504f903

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3656-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/3656-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3656-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3656-49-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3788-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3788-1-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB

  • memory/3788-2-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB

  • memory/3788-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/3788-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB