Analysis

  • max time kernel
    140s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-05-2024 02:31

General

  • Target

    2024-05-22_4a6ba5cca4f542c3c6bf0ff8b4a8294e_cryptolocker.exe

  • Size

    44KB

  • MD5

    4a6ba5cca4f542c3c6bf0ff8b4a8294e

  • SHA1

    06009607f7d6c9341d934696116c742f42b76254

  • SHA256

    abcbf1df312087c1849600b16369845fcfc98bb958325df2808a92461929dbe5

  • SHA512

    9f30f1da48c36ece7efc4428e4008895c02cf56c22913eb9ce3487f21c675448786be8ba937222de9b53726f4eecab4444bbc97f998aece27cf227a1a796c65f

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqh6/aMDH:6j+1NMOtEvwDpjrRrb

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 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\2024-05-22_4a6ba5cca4f542c3c6bf0ff8b4a8294e_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-22_4a6ba5cca4f542c3c6bf0ff8b4a8294e_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2828
    • 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:4540

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

    44KB

    MD5

    f74b9dc468a419714bb21c287683d0d5

    SHA1

    bff404c9535af790aacda255840f7526f4599a89

    SHA256

    12859b9f1492db82f00567e28552af6d6b1c7c52ebc6754bc0be57f223f8ac0c

    SHA512

    714ea802496ff8c06afe6431904d7d37463066a08dd0c47c7b192c3056fef13583d171f8009cd86c651f70b132fa4bc177f0c2b63dffdf6dddd95ed8a35fc0a9

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

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2828-0-0x0000000000500000-0x000000000050F000-memory.dmp
    Filesize

    60KB

  • memory/2828-1-0x00000000004D0000-0x00000000004D6000-memory.dmp
    Filesize

    24KB

  • memory/2828-2-0x00000000004F0000-0x00000000004F6000-memory.dmp
    Filesize

    24KB

  • memory/2828-9-0x00000000004D0000-0x00000000004D6000-memory.dmp
    Filesize

    24KB

  • memory/2828-17-0x0000000000500000-0x000000000050F000-memory.dmp
    Filesize

    60KB

  • memory/4540-18-0x0000000000500000-0x000000000050F000-memory.dmp
    Filesize

    60KB

  • memory/4540-48-0x0000000000500000-0x000000000050F000-memory.dmp
    Filesize

    60KB