Analysis

  • max time kernel
    138s
  • max time network
    33s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    04-05-2023 12:31

General

  • Target

    arrow/65403a8b9ecca912ea5cfa91aecdbe77c23e652e4c7465efded126c74711f65e.exe

  • Size

    138KB

  • MD5

    11b99c53b1e6030355af231a3a7fa65b

  • SHA1

    50b4a627dd808c1e332c2803286234f37e46bc2d

  • SHA256

    65403a8b9ecca912ea5cfa91aecdbe77c23e652e4c7465efded126c74711f65e

  • SHA512

    33a134c15708651e725daf0c834a01d970718f90109db275c38dbfd0501486c126d0566ab61cc55f4f47c3e7988483b7b445101b11388cff6399f4815ec63764

  • SSDEEP

    3072:KbvC5mz7Bqh1v59Y08mAjs0Ltel+qOeJHlpV8b+Y/YP:KbvuS7BqjjYHdrqkL/

Malware Config

Extracted

Family

arrowrat

Botnet

41IUHU

C2

6.tcp.eu.ngrok.io:15821

Mutex

S2TDUW

Signatures

  • ArrowRat

    Remote access tool with various capabilities first seen in late 2021.

  • Modifies Installed Components in the registry 2 TTPs 1 IoCs
  • Modifies registry class 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 21 IoCs
  • Suspicious use of AdjustPrivilegeToken 16 IoCs
  • Suspicious use of FindShellTrayWindow 27 IoCs
  • Suspicious use of SendNotifyMessage 16 IoCs
  • Suspicious use of WriteProcessMemory 46 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\arrow\65403a8b9ecca912ea5cfa91aecdbe77c23e652e4c7465efded126c74711f65e.exe
    "C:\Users\Admin\AppData\Local\Temp\arrow\65403a8b9ecca912ea5cfa91aecdbe77c23e652e4c7465efded126c74711f65e.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2044
    • C:\Windows\explorer.exe
      "C:\Windows\explorer.exe"
      2⤵
      • Modifies Installed Components in the registry
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:1992
      • C:\Windows\system32\ctfmon.exe
        ctfmon.exe
        3⤵
          PID:1160
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" 41IUHU 6.tcp.eu.ngrok.io 15821 S2TDUW
        2⤵
          PID:904
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" 41IUHU 6.tcp.eu.ngrok.io 15821 S2TDUW
          2⤵
            PID:1840
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" 41IUHU 6.tcp.eu.ngrok.io 15821 S2TDUW
            2⤵
              PID:272
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
              "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" 41IUHU 6.tcp.eu.ngrok.io 15821 S2TDUW
              2⤵
                PID:560
              • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
                "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" 41IUHU 6.tcp.eu.ngrok.io 15821 S2TDUW
                2⤵
                  PID:1764
                • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
                  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" 41IUHU 6.tcp.eu.ngrok.io 15821 S2TDUW
                  2⤵
                    PID:912
                  • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
                    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" 41IUHU 6.tcp.eu.ngrok.io 15821 S2TDUW
                    2⤵
                      PID:1392
                    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
                      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" 41IUHU 6.tcp.eu.ngrok.io 15821 S2TDUW
                      2⤵
                        PID:1656
                      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
                        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" 41IUHU 6.tcp.eu.ngrok.io 15821 S2TDUW
                        2⤵
                          PID:528
                        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
                          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" 41IUHU 6.tcp.eu.ngrok.io 15821 S2TDUW
                          2⤵
                            PID:1544
                        • C:\Windows\system32\AUDIODG.EXE
                          C:\Windows\system32\AUDIODG.EXE 0x57c
                          1⤵
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1604

                        Network

                        MITRE ATT&CK Enterprise v6

                        Replay Monitor

                        Loading Replay Monitor...

                        Downloads

                        • memory/1992-55-0x0000000003AE0000-0x0000000003AE1000-memory.dmp

                          Filesize

                          4KB

                        • memory/1992-56-0x0000000003AE0000-0x0000000003AE1000-memory.dmp

                          Filesize

                          4KB

                        • memory/1992-60-0x0000000002BB0000-0x0000000002BC0000-memory.dmp

                          Filesize

                          64KB

                        • memory/2044-54-0x00000000009B0000-0x00000000009D8000-memory.dmp

                          Filesize

                          160KB