Analysis

  • max time kernel
    135s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-05-2024 00:46

General

  • Target

    2024-05-23_afccff4e31a4b7ff173955479ab5eb73_cryptolocker.exe

  • Size

    48KB

  • MD5

    afccff4e31a4b7ff173955479ab5eb73

  • SHA1

    7a8f9f097d519fedfe61e27e0d12bef1c440f047

  • SHA256

    d8b29e5208ceb02250633fd4e45a49e282c272aa9f304ade0f70772659cfd075

  • SHA512

    7a0a13922170c5233464e5e8ccdb61b574db424fb9d6d18a57d6ddc82280c4b4ec5f70b7fab9e310531b4f359bd4ef998e5f2b817f9194df35708f89fa3a7cde

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4/Uth8igNrr42A7n0FmB0nkY:vj+jsMQMOtEvwDpj5HczerLO04BQ

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 6 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-23_afccff4e31a4b7ff173955479ab5eb73_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-23_afccff4e31a4b7ff173955479ab5eb73_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:216
    • 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:2084

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

    49KB

    MD5

    b559cd368488d36cd36631eedb1c8217

    SHA1

    37913102897e823fd5aa2ef73496502fc95f6dd3

    SHA256

    79273c04e800b118c6759c6d54df828306612a7c89df3c7bc387000720b8dbbe

    SHA512

    ac7499c6b62d896ed971566653a709c72d86e6f24ff28278666cf9615ee7b6c6a9c7307e64643d496040bed2f00f45393820e2faeb64da991c560fc0a4771276

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

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/216-0-0x0000000000560000-0x0000000000566000-memory.dmp
    Filesize

    24KB

  • memory/216-1-0x0000000002070000-0x0000000002076000-memory.dmp
    Filesize

    24KB

  • memory/216-8-0x0000000000560000-0x0000000000566000-memory.dmp
    Filesize

    24KB

  • memory/2084-17-0x00000000004F0000-0x00000000004F6000-memory.dmp
    Filesize

    24KB

  • memory/2084-23-0x00000000004D0000-0x00000000004D6000-memory.dmp
    Filesize

    24KB