Analysis

  • max time kernel
    149s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    15/02/2022, 02:40

General

  • Target
    4138b12d085e1f11652cea9dfc72a58c.exe
  • Size 1.2MB
  • Sample220215-c5w4mscbcn
  • SHA256 3689d5dc265b2a5044a65af844f66e0ef5bbb37f19b96c59685c4ecea4091966
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • agenttesla

C2
  • https://api.telegram.org/bot1897716112:AAEAtOCkOV8umHBB93Og24bkiIdUKReGK44/sendDocument

Signatures

  • AgentTesla

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

  • AgentTesla Payload 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Modifies data under HKEY_USERS 56 IoCs
  • Suspicious behavior: EnumeratesProcesses 36 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4138b12d085e1f11652cea9dfc72a58c.exe
    "C:\Users\Admin\AppData\Local\Temp\4138b12d085e1f11652cea9dfc72a58c.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3068
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\TKVQZSmri.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      PID:2704
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\TKVQZSmri" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2195.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2200
    • C:\Users\Admin\AppData\Local\Temp\4138b12d085e1f11652cea9dfc72a58c.exe
      "C:\Users\Admin\AppData\Local\Temp\4138b12d085e1f11652cea9dfc72a58c.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      PID:3668
  • C:\Windows\system32\MusNotifyIcon.exe
    %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
    1⤵
    • Checks processor information in registry
    PID:3844
  • 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:336
  • 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:3976

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/2704-153-0x00000000074C0000-0x0000000007526000-memory.dmp

        memory/2704-159-0x00000000080C0000-0x00000000080DE000-memory.dmp

        memory/2704-167-0x0000000009150000-0x0000000009158000-memory.dmp

        memory/2704-166-0x0000000009170000-0x000000000918A000-memory.dmp

        memory/2704-165-0x0000000009060000-0x000000000906E000-memory.dmp

        memory/2704-142-0x0000000004240000-0x0000000004276000-memory.dmp

        memory/2704-164-0x00000000090B0000-0x0000000009146000-memory.dmp

        memory/2704-144-0x0000000006D40000-0x0000000007368000-memory.dmp

        memory/2704-163-0x0000000008EA0000-0x0000000008EAA000-memory.dmp

        memory/2704-162-0x000000007FC30000-0x000000007FC31000-memory.dmp

        memory/2704-148-0x0000000006B50000-0x0000000006B72000-memory.dmp

        memory/2704-149-0x00000000042F0000-0x00000000042F1000-memory.dmp

        memory/2704-150-0x00000000042F2000-0x00000000042F3000-memory.dmp

        memory/2704-161-0x0000000008E30000-0x0000000008E4A000-memory.dmp

        memory/2704-160-0x0000000009470000-0x0000000009AEA000-memory.dmp

        memory/2704-151-0x00000000073E0000-0x0000000007446000-memory.dmp

        memory/2704-155-0x0000000007B20000-0x0000000007B3E000-memory.dmp

        memory/2704-147-0x00000000744EE000-0x00000000744EF000-memory.dmp

        memory/2704-158-0x0000000070320000-0x000000007036C000-memory.dmp

        memory/2704-156-0x00000000042F5000-0x00000000042F7000-memory.dmp

        memory/2704-157-0x00000000080F0000-0x0000000008122000-memory.dmp

        memory/3068-133-0x0000000000820000-0x0000000000952000-memory.dmp

        memory/3068-136-0x0000000005350000-0x00000000053E2000-memory.dmp

        memory/3068-134-0x00000000744EE000-0x00000000744EF000-memory.dmp

        memory/3068-135-0x0000000005900000-0x0000000005EA4000-memory.dmp

        memory/3068-139-0x0000000008B00000-0x0000000008B9C000-memory.dmp

        memory/3068-138-0x0000000005300000-0x000000000530A000-memory.dmp

        memory/3068-137-0x00000000052D0000-0x00000000052D1000-memory.dmp

        memory/3668-154-0x0000000005820000-0x0000000005821000-memory.dmp

        memory/3668-152-0x00000000744EE000-0x00000000744EF000-memory.dmp

        memory/3668-145-0x0000000000400000-0x000000000043C000-memory.dmp