Overview

overview

10

Static

static

10

arrow/0caa...bd.exe

windows7-x64

10

arrow/0caa...bd.exe

windows10-2004-x64

10

arrow/150c...0a.exe

windows7-x64

10

arrow/150c...0a.exe

windows10-2004-x64

10

arrow/17a7...ff.exe

windows7-x64

10

arrow/17a7...ff.exe

windows10-2004-x64

10

arrow/2380...0c.exe

windows7-x64

10

arrow/2380...0c.exe

windows10-2004-x64

10

arrow/2fb8...ee.exe

windows7-x64

3

arrow/2fb8...ee.exe

windows10-2004-x64

7

arrow/3dbd...fb.exe

windows7-x64

10

arrow/3dbd...fb.exe

windows10-2004-x64

10

arrow/4a09...07.exe

windows7-x64

10

arrow/4a09...07.exe

windows10-2004-x64

10

arrow/4c4d...a5.exe

windows7-x64

3

arrow/4c4d...a5.exe

windows10-2004-x64

7

arrow/54a0...24.exe

windows7-x64

10

arrow/54a0...24.exe

windows10-2004-x64

10

arrow/59a7...8c.exe

windows7-x64

10

arrow/59a7...8c.exe

windows10-2004-x64

10

arrow/5a45...7c.exe

windows7-x64

10

arrow/5a45...7c.exe

windows10-2004-x64

10

arrow/5d57...92.exe

windows7-x64

10

arrow/5d57...92.exe

windows10-2004-x64

10

arrow/6540...5e.exe

windows7-x64

10

arrow/6540...5e.exe

windows10-2004-x64

10

arrow/8a3d...bc.exe

windows7-x64

10

arrow/8a3d...bc.exe

windows10-2004-x64

10

arrow/a192...71.exe

windows7-x64

10

arrow/a192...71.exe

windows10-2004-x64

7

arrow/b20d...3f.exe

windows7-x64

10

arrow/b20d...3f.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    139s
  • max time network
    34s
  • 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

Sharing

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General

  • Target

    arrow/0caa17db0c1d695ce4e5bc3f3fc7c9c2e7f96e489108e0303b81fa45efcf92bd.exe

  • Size

    138KB

  • MD5

    bb434c347ca1709e54bee1a5d9a5757e

  • SHA1

    844b1f01f53eb6e8f8934880fa7f8994c4245dd4

  • SHA256

    0caa17db0c1d695ce4e5bc3f3fc7c9c2e7f96e489108e0303b81fa45efcf92bd

  • SHA512

    46b87c83ce85d44b152a5921b76f65af19fc93896bc8557b979c72ffdbaef3b21245f1c8aea75a5bd2125bc8df7485f2bcaf98d8b7ee0785c8c1496d08a571be

  • SSDEEP

    3072:PbvG5mz7Bqh1v59Y08mAjs0Ltel+qOeJHlpV8b+Y/Yt:PbviS7BqjjYHdrqkL/

Score
10/10
arrowratkrck1rpersistencerat

Malware Config

Extracted

Family

arrowrat

Botnet

KRCK1R

C2

185.183.35.38:1338

Mutex

4IA671

Signatures

  • ArrowRat

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

    ratarrowrat
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
    persistence
  • Modifies Installed Components in the registry 2 TTPs 1 IoCs
    persistence
  • 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 17 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.

    persistence

Processes

  • C:\Users\Admin\AppData\Local\Temp\arrow\0caa17db0c1d695ce4e5bc3f3fc7c9c2e7f96e489108e0303b81fa45efcf92bd.exe
    "C:\Users\Admin\AppData\Local\Temp\arrow\0caa17db0c1d695ce4e5bc3f3fc7c9c2e7f96e489108e0303b81fa45efcf92bd.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1648
    • 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:1496
      • C:\Windows\system32\ctfmon.exe
        ctfmon.exe
        3⤵
          PID:1536
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" KRCK1R 185.183.35.38 1338 4IA671
        2⤵
          PID:1520
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" KRCK1R 185.183.35.38 1338 4IA671
          2⤵
            PID:468
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" KRCK1R 185.183.35.38 1338 4IA671
            2⤵
              PID:1316
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
              "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" KRCK1R 185.183.35.38 1338 4IA671
              2⤵
                PID:1100
              • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
                "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" KRCK1R 185.183.35.38 1338 4IA671
                2⤵
                  PID:1760
                • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
                  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" KRCK1R 185.183.35.38 1338 4IA671
                  2⤵
                    PID:544
                  • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
                    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" KRCK1R 185.183.35.38 1338 4IA671
                    2⤵
                      PID:1148
                    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
                      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" KRCK1R 185.183.35.38 1338 4IA671
                      2⤵
                        PID:656
                      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
                        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" KRCK1R 185.183.35.38 1338 4IA671
                        2⤵
                          PID:1960
                        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
                          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" KRCK1R 185.183.35.38 1338 4IA671
                          2⤵
                            PID:340
                        • C:\Windows\system32\AUDIODG.EXE
                          C:\Windows\system32\AUDIODG.EXE 0x1a8
                          1⤵
                          • Suspicious use of AdjustPrivilegeToken
                          PID:1576

                        Network

                        MITRE ATT&CK Enterprise v6

                        Replay Monitor

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                        Downloads

                        • memory/1496-56-0x0000000003BE0000-0x0000000003BE1000-memory.dmp

                          Filesize

                          4KB

                          Download

                        • memory/1496-57-0x0000000003BE0000-0x0000000003BE1000-memory.dmp

                          Filesize

                          4KB

                          Download

                        • memory/1496-61-0x0000000002640000-0x0000000002650000-memory.dmp

                          Filesize

                          64KB

                          Download

                        • memory/1648-54-0x00000000011D0000-0x00000000011F8000-memory.dmp

                          Filesize

                          160KB

                          Download