Analysis

  • max time kernel
    136s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    21/03/2022, 12:12

General

  • Target
    MOD41SA10PSQ4W1.exe
  • Size 70KB
  • Sample220321-pc6tlacae6
  • SHA256 c6045ce3162c17ebce174609ecbca8e5024a69edcc37c89bc60ff2e07cb52475
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • agenttesla

Credentials

Signatures

  • AgentTesla

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

  • Drops file in Drivers directory 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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.

  • 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.

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\MOD41SA10PSQ4W1.exe
    "C:\Users\Admin\AppData\Local\Temp\MOD41SA10PSQ4W1.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2924
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 20
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1488
      • C:\Windows\SysWOW64\timeout.exe
        timeout 20
        3⤵
        • Delays execution with timeout.exe
        PID:4896
    • C:\Users\Admin\AppData\Local\Temp\MOD41SA10PSQ4W1.exe
      C:\Users\Admin\AppData\Local\Temp\MOD41SA10PSQ4W1.exe
      2⤵
      • Drops file in Drivers directory
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:4300

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/2924-131-0x0000000074DF0000-0x00000000755A0000-memory.dmp

        memory/2924-132-0x0000000005C00000-0x0000000005C01000-memory.dmp

        memory/2924-130-0x0000000000FA0000-0x0000000000FB8000-memory.dmp

        memory/4300-136-0x0000000004F90000-0x000000000502C000-memory.dmp

        memory/4300-135-0x0000000005540000-0x0000000005AE4000-memory.dmp

        memory/4300-133-0x0000000000400000-0x000000000043A000-memory.dmp

        memory/4300-137-0x0000000074DF0000-0x00000000755A0000-memory.dmp

        memory/4300-138-0x0000000004F90000-0x0000000005534000-memory.dmp

        memory/4300-139-0x0000000005C30000-0x0000000005C96000-memory.dmp

        memory/4300-140-0x00000000061E0000-0x0000000006230000-memory.dmp

        memory/4300-141-0x0000000006640000-0x00000000066D2000-memory.dmp

        memory/4300-142-0x0000000006610000-0x000000000661A000-memory.dmp