Analysis

  • max time kernel
    149s
  • max time network
    149s
  • 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 02:47

General

  • Target

    2024-05-22_bc3c7b14f589d2828611c67bf9b8dbec_cryptolocker.exe

  • Size

    78KB

  • MD5

    bc3c7b14f589d2828611c67bf9b8dbec

  • SHA1

    dfbd3b95f7d1f0d98655e28c02030f7a11490269

  • SHA256

    84980547423b4cd6e04b1116c90f8a63557e0e43bd40e2597b2cd83b38225eea

  • SHA512

    c77a5bea0b4ef796c8915e00a299a8bb75e7a3859ab85121cc75bda5eda2a3261dc86945fa58d4f9735f24f51e02d8ce9da51bc7af4a570e5e2510469c256b80

  • SSDEEP

    1536:ZzFbxmLPWQMOtEvwDpj386Sj/WprgJN6tZdOyJ3KUYZ:ZVxkGOtEvwDpjca2

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 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\2024-05-22_bc3c7b14f589d2828611c67bf9b8dbec_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-22_bc3c7b14f589d2828611c67bf9b8dbec_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2552
    • 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:1148

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

    78KB

    MD5

    a88670430839bf1ca0872f876fe82f84

    SHA1

    13470c32ef08281101c140588642921fd4c5a593

    SHA256

    435eed41226328733c18be9dd317ea14d4aabc73871eac287202d79c7c45421e

    SHA512

    946cf35f94fe3e76e42d33c1e52e654685e4a0d0a219ce950e18de99be37b99a49e3f59c98419f709d55dc7ae0165e785bd01cd12701b3ad40393572dda8b34b

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

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1148-19-0x00000000006D0000-0x00000000006D6000-memory.dmp
    Filesize

    24KB

  • memory/1148-25-0x0000000000660000-0x0000000000666000-memory.dmp
    Filesize

    24KB

  • memory/2552-0-0x00000000004F0000-0x00000000004F3000-memory.dmp
    Filesize

    12KB

  • memory/2552-1-0x00000000005B0000-0x00000000005B6000-memory.dmp
    Filesize

    24KB

  • memory/2552-2-0x0000000002070000-0x0000000002076000-memory.dmp
    Filesize

    24KB

  • memory/2552-9-0x00000000005B0000-0x00000000005B6000-memory.dmp
    Filesize

    24KB

  • memory/2552-17-0x00000000004F0000-0x00000000004F3000-memory.dmp
    Filesize

    12KB