Analysis

  • max time kernel
    135s
  • max time network
    130s
  • 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 02:27

General

  • Target

    2024-05-22_310495fd12a30e323038c57a88465309_cryptolocker.exe

  • Size

    78KB

  • MD5

    310495fd12a30e323038c57a88465309

  • SHA1

    c764869d89a43e71e946e00a0b063342d036dd91

  • SHA256

    b7245f9e454c415a440451b884bd87a8d62821d1f9d93c631abc7562c0eaa160

  • SHA512

    41249e11d65d0a330b3a5408101277130d13639215f5c258f2268205035c17cc5721495cbae26edc7647e1baf1b409ef05927b9441cd08e8b1b62349d22e70c9

  • SSDEEP

    1536:ZzFbxmLPWQMOtEvwDpj386Sj/WprgJN6tZdOyJ3KUY7:ZVxkGOtEvwDpjcao

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_310495fd12a30e323038c57a88465309_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-22_310495fd12a30e323038c57a88465309_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4744
    • 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:1692

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

    1326b2a9786a5259de8778d74186a28b

    SHA1

    b85a4fdd263ce2b1be024d3f431082602a1d7d47

    SHA256

    2c46802124de6e25148fdf5b800d65dffa266400e5a647cbc46ac4c29b769ea0

    SHA512

    bf9a2987f73913eaa27caa93e747d390625ddc5e20f5b74ff3a8a78ad15b096a3ba88f1ef1652684e283bb4a682830aeca209ffe04c933d30eb2e3f0d5be979a

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

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1692-21-0x00000000004F0000-0x00000000004F6000-memory.dmp
    Filesize

    24KB

  • memory/1692-20-0x00000000004D0000-0x00000000004D6000-memory.dmp
    Filesize

    24KB

  • memory/1692-19-0x0000000000450000-0x0000000000490000-memory.dmp
    Filesize

    256KB

  • memory/4744-0-0x00000000004E0000-0x00000000004E3000-memory.dmp
    Filesize

    12KB

  • memory/4744-1-0x0000000000660000-0x0000000000666000-memory.dmp
    Filesize

    24KB

  • memory/4744-9-0x0000000000660000-0x0000000000666000-memory.dmp
    Filesize

    24KB

  • memory/4744-2-0x0000000002070000-0x0000000002076000-memory.dmp
    Filesize

    24KB

  • memory/4744-17-0x00000000004E0000-0x00000000004E3000-memory.dmp
    Filesize

    12KB