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Analysis

  • max time kernel
    95s
  • max time network
    84s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-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
  • 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: MapViewOfSection 1 IoCs
  • Suspicious use of WriteProcessMemory 9 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:768
    • 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
      • Suspicious use of NtCreateThreadExHideFromDebugger
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of WriteProcessMemory
      PID:1932
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
        dw20.exe -x -s 984
        3⤵
          PID:1144

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • \Users\Admin\AppData\Local\Temp\nsoAAE.tmp\System.dll

      Filesize

      11KB

      MD5

      75ed96254fbf894e42058062b4b4f0d1

      SHA1

      996503f1383b49021eb3427bc28d13b5bbd11977

      SHA256

      a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

      SHA512

      58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

    • memory/768-54-0x0000000076871000-0x0000000076873000-memory.dmp

      Filesize

      8KB

    • memory/768-56-0x00000000025D0000-0x000000000321A000-memory.dmp

      Filesize

      12.3MB

    • memory/768-57-0x00000000025D0000-0x000000000321A000-memory.dmp

      Filesize

      12.3MB

    • memory/768-58-0x0000000077CA0000-0x0000000077E49000-memory.dmp

      Filesize

      1.7MB

    • memory/768-78-0x0000000077E80000-0x0000000078000000-memory.dmp

      Filesize

      1.5MB

    • memory/768-62-0x0000000077E80000-0x0000000078000000-memory.dmp

      Filesize

      1.5MB

    • memory/768-64-0x0000000077E80000-0x0000000078000000-memory.dmp

      Filesize

      1.5MB

    • memory/768-65-0x0000000077E80000-0x0000000078000000-memory.dmp

      Filesize

      1.5MB

    • memory/1932-66-0x00000000001E0000-0x00000000002E0000-memory.dmp

      Filesize

      1024KB

    • memory/1932-67-0x0000000077CA0000-0x0000000077E49000-memory.dmp

      Filesize

      1.7MB

    • memory/1932-69-0x0000000077E80000-0x0000000078000000-memory.dmp

      Filesize

      1.5MB

    • memory/1932-71-0x0000000000400000-0x0000000000615000-memory.dmp

      Filesize

      2.1MB

    • memory/1932-72-0x0000000000401000-0x0000000000615000-memory.dmp

      Filesize

      2.1MB

    • memory/1932-74-0x0000000000400000-0x000000000043C000-memory.dmp

      Filesize

      240KB

    • memory/1932-63-0x00000000001E0000-0x00000000002E0000-memory.dmp

      Filesize

      1024KB

    • memory/1932-77-0x0000000074630000-0x0000000074BDB000-memory.dmp

      Filesize

      5.7MB

    • memory/1932-79-0x0000000074630000-0x0000000074BDB000-memory.dmp

      Filesize

      5.7MB