Analysis

  • max time kernel
    141s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-05-2024 02:42

General

  • Target

    2024-05-22_9a6000133533848edf99ad2eb927d1a4_cryptolocker.exe

  • Size

    59KB

  • MD5

    9a6000133533848edf99ad2eb927d1a4

  • SHA1

    736a6e2fda031691b56521fbab0db9f85d691c94

  • SHA256

    db5eb4c4c39d21f4cbb4fd81a6b1a83149711d47e959433160b709b43575163e

  • SHA512

    433c3e11204ff5ebcf2f671c4b9aa83657ad70ba8cebedcd31837c4c7ff85fcbbe3c9ef2db144576456d721e02d0ad6b8ac59243b0a9ea079c24c623d0f58e90

  • SSDEEP

    768:3Uz7yVEhs9+Hs1SQtOOtEvwDpjO9+4hdCY8EQMjpi/Wpi3B3URiLqCyLuAx8XGJ0:3P+HsMQMOtEvwDpjoHy7B3g9CWuAxWG0

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 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_9a6000133533848edf99ad2eb927d1a4_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-22_9a6000133533848edf99ad2eb927d1a4_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1704
    • 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:4624

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

    60KB

    MD5

    9eb57f8306b8f648420a648ad691c8ae

    SHA1

    9da850ac9cfab98981350e7ae6b91f03bc735f06

    SHA256

    1166821adf7f8de75583c1783bd4a973668311f944d1ac77ff9846e13bef3db9

    SHA512

    16c63b68c2ed2445abcfbad07a4e290f56ad8bb7ed278309db8cca2f29615e785e9505049d1711ca05f5837b129bf657848ca101ca3f309ed94c54cd23c0fce3

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

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1704-0-0x0000000000500000-0x000000000050B000-memory.dmp
    Filesize

    44KB

  • memory/1704-1-0x00000000005B0000-0x00000000005B6000-memory.dmp
    Filesize

    24KB

  • memory/1704-2-0x00000000005D0000-0x00000000005D6000-memory.dmp
    Filesize

    24KB

  • memory/1704-9-0x00000000005B0000-0x00000000005B6000-memory.dmp
    Filesize

    24KB

  • memory/1704-18-0x0000000000500000-0x000000000050B000-memory.dmp
    Filesize

    44KB

  • memory/4624-16-0x0000000000500000-0x000000000050B000-memory.dmp
    Filesize

    44KB

  • memory/4624-20-0x00000000007D0000-0x00000000007D6000-memory.dmp
    Filesize

    24KB

  • memory/4624-26-0x00000000006A0000-0x00000000006A6000-memory.dmp
    Filesize

    24KB

  • memory/4624-49-0x0000000000500000-0x000000000050B000-memory.dmp
    Filesize

    44KB