Analysis

  • max time kernel
    133s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-05-2024 15:37

General

  • Target

    2024-05-21_5990091b19055221c3d1a9292bf4c6d8_cryptolocker.exe

  • Size

    42KB

  • MD5

    5990091b19055221c3d1a9292bf4c6d8

  • SHA1

    0e847108ae35e02e45d35fa6cfb27093c183f48c

  • SHA256

    f3536ea0615b9d894553a2bb17c1aba5bf593316fc88bcd02bd9a72ce06fd7e8

  • SHA512

    19e5e479dd506c6140a7c00b1923e7d003576450f93223c5eccc6922886538e306d8e13a2a9f23b823c85eaed5aef942d015a53babf4ef84aaecaa68105a1d49

  • SSDEEP

    768:XS5nQJ24LR1bytOOtEvwDpj66BLbjG9Rva/yYsZnH:i5nkFGMOtEvwDpjR+viHsp

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 IoCs
  • Detects executables built or packed with MPress PE compressor 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
  • 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\2024-05-21_5990091b19055221c3d1a9292bf4c6d8_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_5990091b19055221c3d1a9292bf4c6d8_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2892
    • 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:1080

Network

MITRE ATT&CK Matrix ATT&CK v13

Defense Evasion

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Modify Registry

1
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

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

    42KB

    MD5

    a0387164bb44f6bbbe80ad301878839b

    SHA1

    a4a6981d9d38a0719123fd8bf11fe7a2ebb97ad8

    SHA256

    9bfb4e080fa7c7423d4b840eb300b5c2e69463a7b73589506152d0c3957fe56f

    SHA512

    b62bf969a16549c368dd015fe48cc056d228c163838dbbfba54ccca86a69160b221536c39f6c948db6b5ddd694562f2ecaef162853805d859d9d77182edf3177

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

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1080-16-0x0000000000500000-0x000000000050F000-memory.dmp
    Filesize

    60KB

  • memory/1080-20-0x0000000000760000-0x0000000000766000-memory.dmp
    Filesize

    24KB

  • memory/1080-26-0x0000000000740000-0x0000000000746000-memory.dmp
    Filesize

    24KB

  • memory/1080-49-0x0000000000500000-0x000000000050F000-memory.dmp
    Filesize

    60KB

  • memory/2892-0-0x0000000000500000-0x000000000050F000-memory.dmp
    Filesize

    60KB

  • memory/2892-1-0x00000000004D0000-0x00000000004D6000-memory.dmp
    Filesize

    24KB

  • memory/2892-2-0x00000000004F0000-0x00000000004F6000-memory.dmp
    Filesize

    24KB

  • memory/2892-9-0x00000000004D0000-0x00000000004D6000-memory.dmp
    Filesize

    24KB

  • memory/2892-17-0x0000000000500000-0x000000000050F000-memory.dmp
    Filesize

    60KB