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Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/03/2024, 04:10

General

  • Target

    2024-03-29_ea25d6e042fbbdbcd53519bfe58bba1d_cryptolocker.exe

  • Size

    63KB

  • MD5

    ea25d6e042fbbdbcd53519bfe58bba1d

  • SHA1

    bbb887bf005d499284ab2e2b1262cb1b7df88e14

  • SHA256

    61ab4acf8f5df56aeae5bcde1df99ccff9923ddb63a4a4605be30b67115319d0

  • SHA512

    9a9bbc9067d3cf2dddf4ee89d9eebf88aaa1dcd52b0f904971f00e92ab0285c8b35c68dfc3a46eb6b986529aec5d35787a636436681fe2adefa114baac021726

  • SSDEEP

    768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mnVwfX7:zj+soPSMOtEvwDpj4kpmeLmnw7

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • UPX dump on OEP (original entry point) 4 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 4 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\2024-03-29_ea25d6e042fbbdbcd53519bfe58bba1d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-29_ea25d6e042fbbdbcd53519bfe58bba1d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:400
    • 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:1896

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    63KB

    MD5

    e58222265abd701f02beb6a79a2d74ae

    SHA1

    2f3f0a3559721c2118980a8898924bc893c855b1

    SHA256

    ed8e046329181feaf2c191436324b48c5862ca918cc02cb12616f22b2512f083

    SHA512

    1d0634bdc77f732612940ab08cc5084ad38b8cc4355a4d758f209f97bc7a2368047d095ee0c22f8c9fc5e52e1c79496820ea973fc5f8ca87fcb52bbcd34250b1

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/400-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/400-1-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/400-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/400-3-0x0000000002080000-0x0000000002086000-memory.dmp

    Filesize

    24KB

  • memory/400-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1896-19-0x0000000000510000-0x0000000000516000-memory.dmp

    Filesize

    24KB

  • memory/1896-23-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/1896-50-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB