Analysis

  • max time kernel
    150s
  • max time network
    122s
  • platform
    windows10_x64
  • resource
    win10-en-20211014
  • submitted
    04-11-2021 09:39

General

  • Target

    doc3723636638837373344.exe

  • Size

    546KB

  • MD5

    bb0f727180c9b29e51c9ab2a9b4c539c

  • SHA1

    ccd4d7a83603d2471aabb0caf2e1196b9193b586

  • SHA256

    2b6b5926ec7e5d6acea355bbd8f43a89850ed85e0c3739edfad2608ead9f1573

  • SHA512

    ce0670de14582f900b89149cb63fdfe171d188a1a7752d72ed068e57775c54557817acd09148d93725bd52456ed901de8e6b6d0fec0d064b24b46fa8dab7e5d5

Malware Config

Extracted

Family

blustealer

Credentials

  • Protocol:
    smtp
  • Host:
    mail.yekamuhendislik.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    MuhasebE123*

Signatures

  • A310logger

    A310 Logger is a .NET stealer/logger targeting passwords from browsers and email clients.

  • BluStealer

    A Modular information stealer written in Visual Basic.

  • A310logger Executable 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Reads local data of messenger clients 2 TTPs

    Infostealers often target stored data of messaging applications, which can include saved credentials and account information.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\doc3723636638837373344.exe
    "C:\Users\Admin\AppData\Local\Temp\doc3723636638837373344.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2112
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ARXXSy" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9CE8.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1432
    • C:\Users\Admin\AppData\Local\Temp\doc3723636638837373344.exe
      "C:\Users\Admin\AppData\Local\Temp\doc3723636638837373344.exe"
      2⤵
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:708
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\Fox.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\Fox.exe
        3⤵
        • Executes dropped EXE
        • Accesses Microsoft Outlook profiles
        • outlook_office_path
        • outlook_win_path
        PID:1780
      • C:\Program Files (x86)\Windows Mail\WinMail.exe
        "C:\Program Files (x86)\Windows Mail\WinMail" OCInstallUserConfigOE
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1496
        • C:\Program Files\Windows Mail\WinMail.exe
          "C:\Program Files\Windows Mail\WinMail" OCInstallUserConfigOE
          4⤵
            PID:1144

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/708-125-0x0000000000400000-0x0000000000456000-memory.dmp

      Filesize

      344KB

    • memory/708-128-0x00000000014A0000-0x00000000014AA000-memory.dmp

      Filesize

      40KB

    • memory/708-127-0x00000000014A0000-0x00000000014A6000-memory.dmp

      Filesize

      24KB

    • memory/1780-132-0x0000000000360000-0x0000000000361000-memory.dmp

      Filesize

      4KB

    • memory/1780-134-0x0000000000C70000-0x0000000000C72000-memory.dmp

      Filesize

      8KB

    • memory/2112-120-0x00000000056D0000-0x00000000056D1000-memory.dmp

      Filesize

      4KB

    • memory/2112-115-0x0000000000CC0000-0x0000000000CC1000-memory.dmp

      Filesize

      4KB

    • memory/2112-123-0x0000000006660000-0x00000000066D9000-memory.dmp

      Filesize

      484KB

    • memory/2112-122-0x0000000006440000-0x0000000006441000-memory.dmp

      Filesize

      4KB

    • memory/2112-119-0x0000000005620000-0x00000000056B2000-memory.dmp

      Filesize

      584KB

    • memory/2112-118-0x0000000005720000-0x0000000005721000-memory.dmp

      Filesize

      4KB

    • memory/2112-117-0x0000000005C20000-0x0000000005C21000-memory.dmp

      Filesize

      4KB

    • memory/2112-121-0x0000000005A30000-0x0000000005A36000-memory.dmp

      Filesize

      24KB