Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30-05-2024 23:05

General

  • Target

    2024-05-30_734e66041844aeaea9485bfb7839026b_cryptolocker.exe

  • Size

    52KB

  • MD5

    734e66041844aeaea9485bfb7839026b

  • SHA1

    a8d2cca6fe148c6427f14f0c63f15b15ed647d2f

  • SHA256

    9af8eb84827a3098ae2263bce4496904208c3b20f0fc093e7753fa2f9c161b65

  • SHA512

    f16f25daee5800cdb715aaa488a2840e0f0ead1c19aeb3fd42c860d503254a784f4b804adf786f91433f9085f82c79fe14458dbf8c34dc12a5b52f62fb71b3c5

  • SSDEEP

    768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtO2:bODOw9acifAoc+vx

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • UPX dump on OEP (original entry point) 5 IoCs
  • Checks computer location settings 2 TTPs 1 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-30_734e66041844aeaea9485bfb7839026b_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-30_734e66041844aeaea9485bfb7839026b_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1712
    • C:\Users\Admin\AppData\Local\Temp\lossy.exe
      "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
      2⤵
      • Executes dropped EXE
      PID:5052

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    52KB

    MD5

    404338b5846ce5531565b67f441e76dc

    SHA1

    3ab34268be626333e9f69550d5150d24b33d504e

    SHA256

    4daf6234029fefd91e7673d47926ae81ebf20035e3c9a368ebc9e21de151860d

    SHA512

    bd67dd82f1c8f188f4d6189de12f2eccc1559ebc30f2e12566fde08a4de89380350981b592d18e8421fa0782c77b08430229abfaaeae7765be31d23caebc438f

  • memory/1712-0-0x0000000008000000-0x000000000800F000-memory.dmp

    Filesize

    60KB

  • memory/1712-1-0x0000000000590000-0x0000000000596000-memory.dmp

    Filesize

    24KB

  • memory/1712-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/1712-9-0x0000000000590000-0x0000000000596000-memory.dmp

    Filesize

    24KB

  • memory/1712-17-0x0000000008000000-0x000000000800F000-memory.dmp

    Filesize

    60KB

  • memory/5052-18-0x0000000008000000-0x000000000800F000-memory.dmp

    Filesize

    60KB

  • memory/5052-20-0x00000000020E0000-0x00000000020E6000-memory.dmp

    Filesize

    24KB

  • memory/5052-26-0x00000000020C0000-0x00000000020C6000-memory.dmp

    Filesize

    24KB

  • memory/5052-27-0x0000000008000000-0x000000000800F000-memory.dmp

    Filesize

    60KB