Analysis

  • max time kernel
    135s
  • max time network
    125s
  • 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 02:23

General

  • Target

    2024-05-23_111d83dcdc6026ba8e96f7e5fa830885_cryptolocker.exe

  • Size

    44KB

  • MD5

    111d83dcdc6026ba8e96f7e5fa830885

  • SHA1

    16f4b53d5b9fead6e64339987fd60d38c9475c6e

  • SHA256

    61c80927ef8c9cddbc4777b97916d4ad593ba0864cb591a178f7e355b3cfabc9

  • SHA512

    d4f2010c652af58ed12120f565224a5a1ae525ab18927bed83dc2fb7c4ebc78125d307e1bf4d495c447946a05a8009a32e68ee1fecb576ef1bea4ee3cbcd710a

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4REL+cc66Tcu2:vj+jsMQMOtEvwDpj5HW5scu2

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\2024-05-23_111d83dcdc6026ba8e96f7e5fa830885_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-23_111d83dcdc6026ba8e96f7e5fa830885_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2720
    • 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:1000

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

    44KB

    MD5

    308576ad1d8f2fbbe7bb5bd30754211a

    SHA1

    c268426fb007cd0c5802a40d5645ec09eeaba18f

    SHA256

    1bea1b3e3a4fe7314eb35b7eaa40f078e68c1e2d479818c233e752356e641f8e

    SHA512

    75c993526bd36d0fd173fe25b15a310558d317a9b328599cfc9a33ca56a9e9183dcb6592264b7553648570318a256f3adc7da39e83f6861eec4bb7bf10166576

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

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1000-23-0x00000000006B0000-0x00000000006B6000-memory.dmp
    Filesize

    24KB

  • memory/1000-17-0x0000000001FF0000-0x0000000001FF6000-memory.dmp
    Filesize

    24KB

  • memory/2720-0-0x0000000000730000-0x0000000000736000-memory.dmp
    Filesize

    24KB

  • memory/2720-1-0x00000000020F0000-0x00000000020F6000-memory.dmp
    Filesize

    24KB

  • memory/2720-8-0x0000000000730000-0x0000000000736000-memory.dmp
    Filesize

    24KB