Analysis

  • max time kernel
    136s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-04-2024 22:46

General

  • Target

    2024-04-23_c8af08cb91363bb09b797f5236235a9d_cryptolocker.exe

  • Size

    36KB

  • MD5

    c8af08cb91363bb09b797f5236235a9d

  • SHA1

    783df42317e927c336a49dadc5082672163f1c9c

  • SHA256

    bf956333a673f3f079a80a236332ccf3d9b336b2b406005163b50efb6d203b65

  • SHA512

    7291898a7c1d56ce3b59faafb7c6cf80e77bb1e57220a74462f93b75d816c986ce8b5277f095858e1b9f06bd0776e2044f9d73ea710ec34e9a1df703f84531d5

  • SSDEEP

    768:fTz7y3lhsT+hs1SQtOOtEvwDpjfAu9+4P:fT+hsMQMOtEvwDpjoIHP

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • 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\2024-04-23_c8af08cb91363bb09b797f5236235a9d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-23_c8af08cb91363bb09b797f5236235a9d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2400
    • 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:4756

Network

MITRE ATT&CK Matrix ATT&CK v13

Defense Evasion

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Modify Registry

1
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

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

    36KB

    MD5

    f0ab16a4fc8ca6339b36ecc4fe47b35e

    SHA1

    018b9d1c4e7136066e28ba65e455dd9ed8df1fb0

    SHA256

    a6a249c60f4bff8cdae8496ee4e25d3e61ef47011de8bf696746a4f7a9960b52

    SHA512

    62daf9302055de8d35cbecb8acd21210856c5edf3e896034743b0225d571240091d0204e30bd5c42574a33ac5d39c38334c25e158284100d79d53605617688dc

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

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2400-0-0x0000000000620000-0x0000000000626000-memory.dmp
    Filesize

    24KB

  • memory/2400-1-0x0000000000620000-0x0000000000626000-memory.dmp
    Filesize

    24KB

  • memory/2400-2-0x0000000000750000-0x0000000000756000-memory.dmp
    Filesize

    24KB

  • memory/4756-17-0x00000000020F0000-0x00000000020F6000-memory.dmp
    Filesize

    24KB

  • memory/4756-23-0x0000000000730000-0x0000000000736000-memory.dmp
    Filesize

    24KB