Analysis

  • max time kernel
    130s
  • 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
    11/05/2024, 18:30

General

  • Target

    2024-05-11_36eb307ade023487a0ba7053b5ff0985_cryptolocker.exe

  • Size

    62KB

  • MD5

    36eb307ade023487a0ba7053b5ff0985

  • SHA1

    a66c273578d9a320a5c00a41c6be797297a92844

  • SHA256

    2c92d74596199f66fb795204d1c946bd3339655af7e09458b94af493e890b780

  • SHA512

    46c2bce685f5621b47d3fe741162a7d62f8638eee2c58836c8fa1cc2b1d65f51487faf6f5ec4bf47d95ef6083abad35b81ee78d5e57278432e28f9789011ccd8

  • SSDEEP

    768:3Uz7yVEhs9+Hs1SQtOOtEvwDpjO9+4hdCY8EQMjpi/Wpi3B3URiLqCyLuAx8XG9z:3P+HsMQMOtEvwDpjoHy7B3g9CWuAxWe

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\2024-05-11_36eb307ade023487a0ba7053b5ff0985_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-11_36eb307ade023487a0ba7053b5ff0985_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:684
    • 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:1464

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    62KB

    MD5

    2475bb39f5b3f260cbc9003e4904394a

    SHA1

    2fb4103f4fbd433aa605a6a908b32635a3c7411c

    SHA256

    0aece5b49d28e8101694fa12cb2480e15b32f1b2ba3aecd24899eaf7888fc578

    SHA512

    61035b73b48146127c458f95454d14d0c9228a02f36d82c3e4f196a1f6541a0e3d4fcb29556d360daee4a50785f11ab39c2887f24e683eb7bc8385c7ed494d2e

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/684-0-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/684-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/684-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/684-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/684-17-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/1464-18-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/1464-50-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB