Analysis

  • max time kernel
    143s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230703-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/08/2023, 18:19

General

  • Target

    3797c2db9af7b814e5dd0721a164311b_cryptolocker_JC.exe

  • Size

    87KB

  • MD5

    3797c2db9af7b814e5dd0721a164311b

  • SHA1

    b08017d8f62fc70e77a9764dca9aaf51857fd9ca

  • SHA256

    659a57ed80d71435be40d5c99156da27158662ffed9171b8f815448d368716a0

  • SHA512

    0a505d46a98dc23267e0f78060f74020093d9669a73186a92ccdd1359bb5cd9749fc6e7facc62d593f420083a34e2a9867da7f273b2b07ab7274d1da2c8819ae

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDj9ys:zCsanOtEvwDpjM

Score
7/10
upx

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • UPX packed file 6 IoCs

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

  • Drops file in System32 directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies system certificate store 2 TTPs 11 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3797c2db9af7b814e5dd0721a164311b_cryptolocker_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\3797c2db9af7b814e5dd0721a164311b_cryptolocker_JC.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1496
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Executes dropped EXE
      • Modifies system certificate store
      PID:4620
  • C:\Windows\System32\svchost.exe
    C:\Windows\System32\svchost.exe -k netsvcs -p
    1⤵
    • Drops file in System32 directory
    PID:4664

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    87KB

    MD5

    bfc4556380205cc4ec8991616a0b8a11

    SHA1

    ba03dfeb9a45c55f1661c4c91739ce5cdb8417d1

    SHA256

    2dc23efe0e39f6ef155e6b0d7c7fa084c558f9868a6a9bfcc04e4078ac5d4223

    SHA512

    72990d46f13ba9b587ed4d37ddd4e38d20feb3e90bfcef3bed66e28c36f56dbd464523d5e4259efcc4b71923350d7f48ced0138ee7684a02ec4822f37f0edb85

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

    Filesize

    87KB

    MD5

    bfc4556380205cc4ec8991616a0b8a11

    SHA1

    ba03dfeb9a45c55f1661c4c91739ce5cdb8417d1

    SHA256

    2dc23efe0e39f6ef155e6b0d7c7fa084c558f9868a6a9bfcc04e4078ac5d4223

    SHA512

    72990d46f13ba9b587ed4d37ddd4e38d20feb3e90bfcef3bed66e28c36f56dbd464523d5e4259efcc4b71923350d7f48ced0138ee7684a02ec4822f37f0edb85

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

    Filesize

    87KB

    MD5

    bfc4556380205cc4ec8991616a0b8a11

    SHA1

    ba03dfeb9a45c55f1661c4c91739ce5cdb8417d1

    SHA256

    2dc23efe0e39f6ef155e6b0d7c7fa084c558f9868a6a9bfcc04e4078ac5d4223

    SHA512

    72990d46f13ba9b587ed4d37ddd4e38d20feb3e90bfcef3bed66e28c36f56dbd464523d5e4259efcc4b71923350d7f48ced0138ee7684a02ec4822f37f0edb85

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1496-133-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1496-134-0x00000000020D0000-0x00000000020D6000-memory.dmp

    Filesize

    24KB

  • memory/1496-135-0x00000000020D0000-0x00000000020D6000-memory.dmp

    Filesize

    24KB

  • memory/1496-136-0x0000000002100000-0x0000000002106000-memory.dmp

    Filesize

    24KB

  • memory/1496-150-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4620-152-0x00000000020E0000-0x00000000020E6000-memory.dmp

    Filesize

    24KB

  • memory/4620-186-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB