Analysis

  • max time kernel
    134s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-05-2024 02:54

General

  • Target

    2024-05-22_ef5afb4aab095b643f25cd4d9db6649f_cryptolocker.exe

  • Size

    40KB

  • MD5

    ef5afb4aab095b643f25cd4d9db6649f

  • SHA1

    4f4be4d59f3d632d44e62ec47cbbef8e3be0f22c

  • SHA256

    37ed7b2afe5cc070f4227a51f5b2f13f2b2d75d149ea4e5e4e5dd6aa45e85acf

  • SHA512

    ca8e3c1727445395ae71b44cecd79b1b9c20a9eaa974f08326aa311793dabc8f124f8265c2974cb53c4d7d8aa2414ff396960e4fab4c372859131df2a7eaaa35

  • SSDEEP

    768:UEEmoQDj/xnMp+yptndwe/PWQtOOtEvwDpjLeJAsKuDkP:ZzFbxmLPWQMOtEvwDpjLeJAsKc0

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 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\2024-05-22_ef5afb4aab095b643f25cd4d9db6649f_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-22_ef5afb4aab095b643f25cd4d9db6649f_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2020
    • 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:4228

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

    41KB

    MD5

    fca5fdf1e09ad586e58ca2169e175941

    SHA1

    16883b8d9734a20634c5cb79e5b7a6ca095b4971

    SHA256

    8904d11a4cab741030c19ec910d2032bf0296f07b5d1e89f354df85edef7028b

    SHA512

    1be5ad99d0a900aeb5707c38bcdacf24f64a45e3bedc8d62dab3c2b876639a3facb92ed29db6b3cd84d8f025eb6727000076b08a17a368054da53cc2a468a021

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

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2020-0-0x00000000004E0000-0x00000000004E3000-memory.dmp
    Filesize

    12KB

  • memory/2020-1-0x0000000000560000-0x0000000000566000-memory.dmp
    Filesize

    24KB

  • memory/2020-2-0x0000000002070000-0x0000000002076000-memory.dmp
    Filesize

    24KB

  • memory/2020-9-0x0000000000560000-0x0000000000566000-memory.dmp
    Filesize

    24KB

  • memory/2020-17-0x00000000004E0000-0x00000000004E3000-memory.dmp
    Filesize

    12KB

  • memory/4228-18-0x0000000000450000-0x0000000000490000-memory.dmp
    Filesize

    256KB

  • memory/4228-20-0x00000000004F0000-0x00000000004F6000-memory.dmp
    Filesize

    24KB

  • memory/4228-26-0x00000000004D0000-0x00000000004D6000-memory.dmp
    Filesize

    24KB