Analysis

  • max time kernel
    155s
  • max time network
    161s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18-03-2024 16:50

General

  • Target

    2024-03-18_f738e0b8dc6d5f8084286effd18942a1_cryptolocker.exe

  • Size

    127KB

  • MD5

    f738e0b8dc6d5f8084286effd18942a1

  • SHA1

    a00e42931b1ed07f08243453b96cd97614d60b10

  • SHA256

    d4851b16932b62b76304d460282bc096765602eb2fb98fc371109ea7c8a79532

  • SHA512

    1ad19b78266fab917189dfb16f34a744f89115f6ce090d5aabe90179a33714673ec04f06c182a5cc1cce4eee8dbb79e456e24466665dcce90ba5edac5ca9be80

  • SSDEEP

    1536:gUj+AIMOtEvwDpjNbwQEIPlemUhYwkkxGBpVNi:vCA9OtEvwDpjm

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 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 10 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-03-18_f738e0b8dc6d5f8084286effd18942a1_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-18_f738e0b8dc6d5f8084286effd18942a1_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5060
    • 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:348

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    127KB

    MD5

    396db622a41d57ccb3c872bd1efddf79

    SHA1

    92c3596b86efcd05033d6ac4370395975502aded

    SHA256

    ecf09d502e5d44c4e027383c5c03426c6c56994f00db3de2ceb17205926fa22c

    SHA512

    3c3a82777ca5efdc837efd38ee5905d9db9e465d9368c10e662f8fc2cfa78935de169c6ecfafdf69319537d564743d426b20caa586c2ea257f03425e34e59a9a

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/348-17-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/348-19-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/5060-0-0x0000000000800000-0x0000000000806000-memory.dmp

    Filesize

    24KB

  • memory/5060-1-0x0000000000800000-0x0000000000806000-memory.dmp

    Filesize

    24KB

  • memory/5060-2-0x0000000000820000-0x0000000000826000-memory.dmp

    Filesize

    24KB