Analysis

  • max time kernel
    62s
  • max time network
    42s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    09-11-2020 19:38

General

  • Target

    Specification and order.bat.exe

  • Size

    499KB

  • MD5

    0d325d81cf8915fd7e534b6f87e6e2ad

  • SHA1

    1aeac4348664caaa887ad423096e55e337addfa0

  • SHA256

    6e256e754b11daba33334ad414554983fccf5df3deec805e4d75c00a02265727

  • SHA512

    ebca2362e5d131cc8fd288680d95c72d88abb5dddf57bf788f0d8b259e3561cedf85cdb295e3c97645727a459ebf2dee58d8826f56cb765f15c0a226ab1eb809

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    polar.argondns.net
  • Port:
    587
  • Username:
    scarz@eilze.in
  • Password:
    r_z3nttsB1+u

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • CoreEntity .NET Packer 1 IoCs

    A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.

  • AgentTesla Payload 4 IoCs
  • rezer0 1 IoCs

    Detects ReZer0, a packer with multiple versions used in various campaigns.

  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

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

  • 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 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Specification and order.bat.exe
    "C:\Users\Admin\AppData\Local\Temp\Specification and order.bat.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:288
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\JJgaLDw" /XML "C:\Users\Admin\AppData\Local\Temp\tmp385F.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1400
    • C:\Users\Admin\AppData\Local\Temp\Specification and order.bat.exe
      "{path}"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1548
      • C:\Windows\SysWOW64\netsh.exe
        "netsh" wlan show profile
        3⤵
          PID:1952

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Scheduled Task

    1
    T1053

    Persistence

    Scheduled Task

    1
    T1053

    Privilege Escalation

    Scheduled Task

    1
    T1053

    Credential Access

    Credentials in Files

    3
    T1081

    Discovery

    System Information Discovery

    1
    T1082

    Collection

    Data from Local System

    3
    T1005

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmp385F.tmp
      MD5

      183c043c8c4d57da779b008b165d49d4

      SHA1

      28359bb088f0e802a3e0e1944c552ab2d1b2e309

      SHA256

      e1b689951e274f569afa5197edaaf09ce4c9b666dc24c34f848c8369440a0b62

      SHA512

      1383f4d021281224294084dda222b10a8c980a3722c5a35f44808f6602d48d17e8a7397861d6d0263b9f667e2aaae18750265790608edb48f359d64f2736c242

    • memory/288-4-0x0000000000350000-0x0000000000353000-memory.dmp
      Filesize

      12KB

    • memory/288-3-0x0000000000370000-0x00000000003CC000-memory.dmp
      Filesize

      368KB

    • memory/288-0-0x0000000073E00000-0x00000000744EE000-memory.dmp
      Filesize

      6.9MB

    • memory/288-5-0x0000000000CF0000-0x0000000000D43000-memory.dmp
      Filesize

      332KB

    • memory/288-1-0x0000000000D60000-0x0000000000D61000-memory.dmp
      Filesize

      4KB

    • memory/1400-6-0x0000000000000000-mapping.dmp
    • memory/1548-8-0x0000000000400000-0x0000000000452000-memory.dmp
      Filesize

      328KB

    • memory/1548-9-0x000000000044CF8E-mapping.dmp
    • memory/1548-10-0x0000000000400000-0x0000000000452000-memory.dmp
      Filesize

      328KB

    • memory/1548-11-0x0000000000400000-0x0000000000452000-memory.dmp
      Filesize

      328KB

    • memory/1548-12-0x0000000073E00000-0x00000000744EE000-memory.dmp
      Filesize

      6.9MB

    • memory/1952-15-0x0000000000000000-mapping.dmp