Analysis

  • max time kernel
    154s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    21-02-2022 23:04

General

  • Target

    DOCUMENT FILE.exe

  • Size

    360KB

  • MD5

    fbe426a8d46b433667c3a30f38c703ab

  • SHA1

    bed53dc755559ecc8ed6a84f7efbe877937324de

  • SHA256

    847fa8413751c698b7cb1f258a4365d8e50915e4811fa916308f6b0e18cbc17d

  • SHA512

    8c22771d773da05bb36d0f4285c25b61157ad42c044d6029f98103b755b5567b2964d225fd18d9d0295bb25a002ba8c9dec9a9567862822ced0ea108f26c8956

Malware Config

Signatures

  • Taurus Stealer

    Taurus is an infostealer first seen in June 2020.

  • Taurus Stealer Payload 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses 2FA software files, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 3 IoCs
  • Delays execution with timeout.exe 1 IoCs
  • Modifies data under HKEY_USERS 54 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\DOCUMENT FILE.exe
    "C:\Users\Admin\AppData\Local\Temp\DOCUMENT FILE.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2020
    • C:\Users\Admin\AppData\Local\Temp\DOCUMENT FILE.exe
      "C:\Users\Admin\AppData\Local\Temp\DOCUMENT FILE.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3080
      • C:\Windows\SysWOW64\cmd.exe
        /c timeout /t 3 & del /f /q C:\Users\Admin\AppData\Local\Temp\DOCUMENT FILE.exe
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3036
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 3
          4⤵
          • Delays execution with timeout.exe
          PID:3800
  • C:\Windows\System32\svchost.exe
    C:\Windows\System32\svchost.exe -k NetworkService -p
    1⤵
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    PID:452
  • C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe
    C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe -Embedding
    1⤵
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    PID:3768

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/2020-130-0x00000000001C0000-0x00000000001E3000-memory.dmp

    Filesize

    140KB

  • memory/2020-131-0x00000000048B0000-0x00000000048E9000-memory.dmp

    Filesize

    228KB

  • memory/3080-132-0x0000000000400000-0x000000000043A000-memory.dmp

    Filesize

    232KB

  • memory/3080-133-0x0000000000400000-0x000000000043A000-memory.dmp

    Filesize

    232KB