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Analysis

  • max time kernel
    128s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/11/2022, 13:57

General

  • Target

    Payment advis pdf.scr.exe

  • Size

    375KB

  • MD5

    c841e0d1d9238121a768bceb6339f5c9

  • SHA1

    62d9cfda2108525125a795467c62cda564c6ebb5

  • SHA256

    2cf36ac3e8c07fcbeb2ec52dd992d2722aa68305db8d5a1dee9be0b6ccd186ef

  • SHA512

    3834eb7529313c7653d46716790620c982f0a933fcabc4be1c37554b6bb198bd726f4dfaee0ee9b338c2f5d51a07294cd7c509b13f5ba78dc4cba3e5cdd782cc

  • SSDEEP

    6144:ZVGdx6x2FUdnyePvRqloupOCaDU+tnvqtxKarFZJDJyUsN/hvRB7y:HtdyePvRTupTaDU+tvc3rpJslhj+

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    ftp
  • Host:
    ftp://ftp.mcmprint.net
  • Port:
    21
  • Username:
    [email protected]
  • Password:
    l9Hh{#_(0shZ

Signatures

  • AgentTesla

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

  • Checks QEMU agent file 2 TTPs 2 IoCs

    Checks presence of QEMU agent, possibly to detect virtualization.

  • Loads dropped DLL 1 IoCs
  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 1 IoCs
  • Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 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.

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Payment advis pdf.scr.exe
    "C:\Users\Admin\AppData\Local\Temp\Payment advis pdf.scr.exe"
    1⤵
    • Checks QEMU agent file
    • Loads dropped DLL
    • Drops file in System32 directory
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:4988
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\caspol.exe
      "C:\Users\Admin\AppData\Local\Temp\Payment advis pdf.scr.exe"
      2⤵
      • Checks QEMU agent file
      • Accesses Microsoft Outlook profiles
      • Suspicious use of NtCreateThreadExHideFromDebugger
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:4408

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\nsu8870.tmp\System.dll

    Filesize

    11KB

    MD5

    75ed96254fbf894e42058062b4b4f0d1

    SHA1

    996503f1383b49021eb3427bc28d13b5bbd11977

    SHA256

    a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

    SHA512

    58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

  • memory/4408-144-0x0000000000401000-0x000000000062B000-memory.dmp

    Filesize

    2.2MB

  • memory/4408-147-0x0000000072CE0000-0x0000000073291000-memory.dmp

    Filesize

    5.7MB

  • memory/4408-150-0x0000000072CE0000-0x0000000073291000-memory.dmp

    Filesize

    5.7MB

  • memory/4408-149-0x0000000077480000-0x0000000077623000-memory.dmp

    Filesize

    1.6MB

  • memory/4408-148-0x00007FF8ED830000-0x00007FF8EDA25000-memory.dmp

    Filesize

    2.0MB

  • memory/4408-139-0x0000000000C00000-0x0000000000D00000-memory.dmp

    Filesize

    1024KB

  • memory/4408-140-0x0000000000C00000-0x0000000000D00000-memory.dmp

    Filesize

    1024KB

  • memory/4408-143-0x0000000000400000-0x000000000062B000-memory.dmp

    Filesize

    2.2MB

  • memory/4408-142-0x0000000077480000-0x0000000077623000-memory.dmp

    Filesize

    1.6MB

  • memory/4408-141-0x00007FF8ED830000-0x00007FF8EDA25000-memory.dmp

    Filesize

    2.0MB

  • memory/4408-146-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/4988-133-0x0000000002970000-0x0000000002A4B000-memory.dmp

    Filesize

    876KB

  • memory/4988-134-0x0000000002970000-0x0000000002A4B000-memory.dmp

    Filesize

    876KB

  • memory/4988-138-0x0000000077480000-0x0000000077623000-memory.dmp

    Filesize

    1.6MB

  • memory/4988-136-0x0000000077480000-0x0000000077623000-memory.dmp

    Filesize

    1.6MB

  • memory/4988-135-0x00007FF8ED830000-0x00007FF8EDA25000-memory.dmp

    Filesize

    2.0MB