Analysis

  • max time kernel
    93s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/04/2024, 20:29

General

  • Target

    2024-04-05_3075ac4561e09c6d53ecda4545c6a76e_cryptolocker.exe

  • Size

    93KB

  • MD5

    3075ac4561e09c6d53ecda4545c6a76e

  • SHA1

    ea1c0a105198b992acfb2d3ab5340957713263c8

  • SHA256

    0bcea7bf7b8c1a966a5ee685684402daf93dd68ef98a3e4cb294b4d9eb0d8e04

  • SHA512

    bf8514b7fdf47fc581b000555ae1c83ba24a6bec45ba701320e648cba2d0fde8fdd9182d6c94b5008746b66715097ae22fb094a77577011e2e5b624ffbf3f37c

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjgx/p:zCsanOtEvwDpjBp

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • UPX dump on OEP (original entry point) 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
  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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\2024-04-05_3075ac4561e09c6d53ecda4545c6a76e_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-05_3075ac4561e09c6d53ecda4545c6a76e_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4996
    • 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:3860

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    93KB

    MD5

    03c4035b746dfc6923411f84906bcc27

    SHA1

    d4b1a46f79b21f88dbf3218862c0b8ecb54b00a9

    SHA256

    f2c9280c6c8bef4ea9ec119ef6e475d7d5f8781683945b11f09c1b0960b92227

    SHA512

    88993df9f9a539f551e048cd720bec140e70720b837846543b9222b969292825e3ab8bed2f8b4220c092886caec38fc702c1f0c23987a27d3f51c4b89f7eadda

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3860-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3860-20-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

    Filesize

    24KB

  • memory/3860-26-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

    Filesize

    24KB

  • memory/3860-49-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4996-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4996-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4996-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4996-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4996-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB