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Analysis

  • max time kernel
    140s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/05/2024, 04:11

General

  • Target

    2024-05-01_4f5207feb7eccb1adeaa107269df8244_cryptolocker.exe

  • Size

    72KB

  • MD5

    4f5207feb7eccb1adeaa107269df8244

  • SHA1

    ada94e48f91aab111f9ee5461baeeae07fe063d6

  • SHA256

    9585642d7f78ee74bd1d9ec7640f1bfebed164cbc6cda690ffea1f30f8fed1d7

  • SHA512

    abc894abfdf37309d08f4363be34473c73fbf10e5471eeb265d89d1c568fa4201a910c4eba6b6b0d4a04868e3eb223fc44b7c1cc7924b8a86b60b84ffa653d2c

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9m:C4Q2c94OtEvwDpj4H8zz

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 2 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\2024-05-01_4f5207feb7eccb1adeaa107269df8244_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-01_4f5207feb7eccb1adeaa107269df8244_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2888
    • 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:4340

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    72KB

    MD5

    393df555e2a156c40a48c0aab6ee5270

    SHA1

    6e0c7e935ae4df0f9269cce23f6d24bcedbfe97e

    SHA256

    fc322b84fd83c1559f3e5c88c0f0215dd6efa431d1d2b58949f8b574640c51f0

    SHA512

    8c2366b212eeed2f9038d277d43010222492e8ad20baf9f2fb04a39ab3dec2b87b4cc01a6085390dc7677e99e876997721a66892651fffdc0fb422b9071f958f

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2888-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2888-1-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/2888-3-0x0000000000750000-0x0000000000756000-memory.dmp

    Filesize

    24KB

  • memory/2888-9-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/2888-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4340-19-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4340-27-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4340-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4340-51-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB