Analysis

  • max time kernel
    160s
  • max time network
    167s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220722-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220722-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-07-2022 08:00

General

  • Target

    sts.exe

  • Size

    1.7MB

  • MD5

    c290cd24892905fbcf3cb39929de19a5

  • SHA1

    4d105c8331d23ded5de85fb18dbe552c73c0998d

  • SHA256

    3e3f8570c11dff0b5a0e061eae6bdd66cf9fa01d815658a0589d98873500358d

  • SHA512

    f25e7a23f855a7e99e8931455368cd97e6d23a9680dc737fb134726a0b3bb965db99b1d1d1d01d156fef3190d296ce2b7bcd5eb39b587ba685516140a3a22ef9

Malware Config

Signatures

  • SatanCryptor

    Golang ransomware first seen in early 2020.

  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Creates a large amount of network flows 1 TTPs

    This may indicate a network scan to discover remotely running services.

  • Enumerates connected drives 3 TTPs 24 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\sts.exe
    "C:\Users\Admin\AppData\Local\Temp\sts.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4504
    • C:\Satan.exe
      "C:\Satan.exe"
      2⤵
      • Executes dropped EXE
      • Enumerates connected drives
      PID:1256
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1256 -s 908
        3⤵
        • Program crash
        PID:12368
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1256 -ip 1256
    1⤵
      PID:12488

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Satan.exe

      Filesize

      142KB

      MD5

      4153cbc1f51bca54ba1e948a3653185b

      SHA1

      090e58b0b9ce144598b375c0c206289308535ef3

      SHA256

      cf12eca0e10dc3370d7917e7678dc09629240d3e7cc71c5ac0df68576bea0682

      SHA512

      d1232323496022e2e48dfa372d9d3844ebd31a2390896bca3914d246666cc29a4019313acf23458c540baa07a261023adf46da5315d21ee0557a0b5eb406fb7f

    • C:\Satan.exe

      Filesize

      142KB

      MD5

      4153cbc1f51bca54ba1e948a3653185b

      SHA1

      090e58b0b9ce144598b375c0c206289308535ef3

      SHA256

      cf12eca0e10dc3370d7917e7678dc09629240d3e7cc71c5ac0df68576bea0682

      SHA512

      d1232323496022e2e48dfa372d9d3844ebd31a2390896bca3914d246666cc29a4019313acf23458c540baa07a261023adf46da5315d21ee0557a0b5eb406fb7f

    • memory/1256-137-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

    • memory/1256-138-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

    • memory/1256-139-0x0000000000400000-0x0000000000485000-memory.dmp

      Filesize

      532KB

    • memory/4504-132-0x0000000000400000-0x0000000000935000-memory.dmp

      Filesize

      5.2MB

    • memory/4504-133-0x0000000000400000-0x0000000000935000-memory.dmp

      Filesize

      5.2MB