Resubmissions

21/01/2025, 11:47

250121-nx1yea1rdw 10

21/01/2025, 11:41

250121-ntrkka1qax 10

Analysis

  • max time kernel
    274s
  • max time network
    293s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/01/2025, 11:47

General

  • Target

    8a2abab20bf75ac19eaa73be3b09219d.exe

  • Size

    455KB

  • MD5

    8a2abab20bf75ac19eaa73be3b09219d

  • SHA1

    c0fa652bb151644bf76b55f3c9d68cb5e8d7faf3

  • SHA256

    866ac65940057d6e1a125eda23a12d6743d75e6ff3a74ff6d53debb3fe90a368

  • SHA512

    e8842b9f47a5dce906ddca3dfbb608eba660c80364ed0b02b48c33e161df3e95226d713177733e7591cc7eccecb3f48e1a731576a90d6fbda194de98de5495c9

  • SSDEEP

    12288:gPn4HHOqpc/Xzm9HtpiuJZoEMkEbSvxJxhF3eggJG:gPn6pc/WHtplJCDkE2/PNz

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

sbmsbm20.duckdns.org:2020

sbmsbm20.duckdns.org:3040

sbmsbm20.duckdns.org:4040

hpdndbnb.duckdns.org:2020

hpdndbnb.duckdns.org:3040

hpdndbnb.duckdns.org:4040

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    true

  • install_file

    Acrobat Reader.exe

  • install_folder

    %Temp%

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

  • Asyncrat family
  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Detected Nirsoft tools 1 IoCs

    Free utilities often used by attackers which can steal passwords, product keys, etc.

  • Stops running service(s) 4 TTPs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 6 IoCs
  • Drops file in System32 directory 3 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • HTTP links in PDF interactive object 1 IoCs

    Detects HTTP links in interactive objects within PDF files.

  • Launches sc.exe 2 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Access Token Manipulation: Create Process with Token 1 TTPs 4 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 12 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Delays execution with timeout.exe 1 IoCs
  • Modifies data under HKEY_USERS 64 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 47 IoCs
  • Suspicious use of AdjustPrivilegeToken 14 IoCs
  • Suspicious use of WriteProcessMemory 43 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8a2abab20bf75ac19eaa73be3b09219d.exe
    C:\Users\Admin\AppData\Local\Temp\8a2abab20bf75ac19eaa73be3b09219d.exe sh $MOZILLA\nPLUGIN %SIGILL% "SIGTERM|DESTROY|SIGKILL"
    1⤵
    • Modifies WinLogon for persistence
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:5032
    • C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe
      "C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe" /EXEFilename "C:\Windows\System32\sc.exe" /WindowState 0 /CommandLine "stop WinDefend" /StartDirectory "" /RunAs 8 /Run
      2⤵
      • Executes dropped EXE
      • Access Token Manipulation: Create Process with Token
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1524
      • C:\Windows\System32\sc.exe
        "C:\Windows\System32\sc.exe" stop WinDefend
        3⤵
        • Launches sc.exe
        PID:3484
    • C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe
      "C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe" /EXEFilename "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" /WindowState 0 /CommandLine "rmdir 'C:\ProgramData\Microsoft\Windows Defender' -Recurse" /StartDirectory "" /RunAs 8 /Run
      2⤵
      • Executes dropped EXE
      • Access Token Manipulation: Create Process with Token
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2280
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" rmdir 'C:\ProgramData\Microsoft\Windows Defender' -Recurse
        3⤵
        • Drops file in System32 directory
        • Modifies data under HKEY_USERS
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3916
    • C:\Users\Admin\AppData\Local\Temp\8a2abab20bf75ac19eaa73be3b09219d.exe
      C:\Users\Admin\AppData\Local\Temp\8a2abab20bf75ac19eaa73be3b09219d.exe
      2⤵
      • Checks computer location settings
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1072
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Acrobat Reader" /tr '"C:\Users\Admin\AppData\Local\Temp\Acrobat Reader.exe"' & exit
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4632
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /create /f /sc onlogon /rl highest /tn "Acrobat Reader" /tr '"C:\Users\Admin\AppData\Local\Temp\Acrobat Reader.exe"'
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:2740
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA4F5.tmp.bat""
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4112
        • C:\Windows\SysWOW64\timeout.exe
          timeout 3
          4⤵
          • System Location Discovery: System Language Discovery
          • Delays execution with timeout.exe
          PID:2724
        • C:\Users\Admin\AppData\Local\Temp\Acrobat Reader.exe
          "C:\Users\Admin\AppData\Local\Temp\Acrobat Reader.exe"
          4⤵
          • Modifies WinLogon for persistence
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:5104
          • C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe
            "C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe" /EXEFilename "C:\Windows\System32\sc.exe" /WindowState 0 /CommandLine "stop WinDefend" /StartDirectory "" /RunAs 8 /Run
            5⤵
            • Executes dropped EXE
            • Access Token Manipulation: Create Process with Token
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:5288
            • C:\Windows\System32\sc.exe
              "C:\Windows\System32\sc.exe" stop WinDefend
              6⤵
              • Launches sc.exe
              PID:5244
          • C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe
            "C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe" /EXEFilename "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" /WindowState 0 /CommandLine "rmdir 'C:\ProgramData\Microsoft\Windows Defender' -Recurse" /StartDirectory "" /RunAs 8 /Run
            5⤵
            • Executes dropped EXE
            • Access Token Manipulation: Create Process with Token
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:5300
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" rmdir 'C:\ProgramData\Microsoft\Windows Defender' -Recurse
              6⤵
              • Drops file in System32 directory
              • Modifies data under HKEY_USERS
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:5376
          • C:\Users\Admin\AppData\Local\Temp\Acrobat Reader.exe
            "C:\Users\Admin\AppData\Local\Temp\Acrobat Reader.exe"
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious use of AdjustPrivilegeToken
            PID:5472

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\8a2abab20bf75ac19eaa73be3b09219d.exe.log

    Filesize

    1KB

    MD5

    b5291f3dcf2c13784e09a057f2e43d13

    SHA1

    fbb72f4b04269e0d35b1d9c29d02d63dbc7ad07e

    SHA256

    ad995b51344d71019f96fc3a424de00256065daad8595ff599f6849c87ae75ce

    SHA512

    11c89caac425bccaa24e2bb24c6f2b4e6d6863278bf8a5304a42bb44475b08ca586e09143e7d5b14db7f1cd9adacd5358769e0d999dc348073431031067bd4d4

  • C:\Users\Admin\AppData\Local\Temp\Acrobat Reader.exe

    Filesize

    455KB

    MD5

    8a2abab20bf75ac19eaa73be3b09219d

    SHA1

    c0fa652bb151644bf76b55f3c9d68cb5e8d7faf3

    SHA256

    866ac65940057d6e1a125eda23a12d6743d75e6ff3a74ff6d53debb3fe90a368

    SHA512

    e8842b9f47a5dce906ddca3dfbb608eba660c80364ed0b02b48c33e161df3e95226d713177733e7591cc7eccecb3f48e1a731576a90d6fbda194de98de5495c9

  • C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe

    Filesize

    88KB

    MD5

    17fc12902f4769af3a9271eb4e2dacce

    SHA1

    9a4a1581cc3971579574f837e110f3bd6d529dab

    SHA256

    29ae7b30ed8394c509c561f6117ea671ec412da50d435099756bbb257fafb10b

    SHA512

    036e0d62490c26dee27ef54e514302e1cc8a14de8ce3b9703bf7caf79cfae237e442c27a0edcf2c4fd41af4195ba9ed7e32e894767ce04467e79110e89522e4a

  • C:\Users\Admin\AppData\Local\Temp\tmpA4F5.tmp.bat

    Filesize

    161B

    MD5

    f929c1920c08511b5f8aac4199434ead

    SHA1

    57983052ed9738c0bc7afeee6f0dd074ec19c20d

    SHA256

    b518cd9ecaf65e3bb6c39d0fe0ffda3d9e248166aed1463d0ecf6c752a5ae985

    SHA512

    8b1bc972563cedd1e2e4197e5831417ffe65f3500542f17e512c1625c3dca8696475fd851b214bed8dbd5e8edb51a2d4be6b5ffba6c9eec9cae18a54ccd69168

  • C:\Windows\Temp\__PSScriptPolicyTest_btkyt2mv.jd1.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

    Filesize

    2KB

    MD5

    6cf293cb4d80be23433eecf74ddb5503

    SHA1

    24fe4752df102c2ef492954d6b046cb5512ad408

    SHA256

    b1f292b6199aa29c7fafbca007e5f9e3f68edcbbca1965bc828cc92dc0f18bb8

    SHA512

    0f91e2da0da8794b9797c7b50eb5dfd27bde4546ceb6902a776664ce887dd6f12a0dd8773d612ccc76dfd029cd280778a0f0ae17ce679b3d2ffd968dd7e94a00

  • C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    Filesize

    1KB

    MD5

    38f0f14cc7ca72ad51216866e66efb4e

    SHA1

    34ed0f47a4aaa95e786ca9f125b0341b38bfb9be

    SHA256

    668820fc659c9d229d32731ead41381eca0e5fb57232bbd3ef0118f5a21fc501

    SHA512

    4a7d00c585784cf1aec6ed82d8c78542d2db3b9da30d8db20680a1ee9fd45b697207fbd459557336f2166d8b6ac17016f9e71c61ad351f2915bb163c8ed2b73a

  • memory/1072-2048-0x0000000005630000-0x00000000056CC000-memory.dmp

    Filesize

    624KB

  • memory/1072-2043-0x0000000000400000-0x0000000000418000-memory.dmp

    Filesize

    96KB

  • memory/3916-2047-0x00007FFA7B7B0000-0x00007FFA7C271000-memory.dmp

    Filesize

    10.8MB

  • memory/3916-2036-0x00007FFA7B7B0000-0x00007FFA7C271000-memory.dmp

    Filesize

    10.8MB

  • memory/3916-2035-0x0000027CF6820000-0x0000027CF6842000-memory.dmp

    Filesize

    136KB

  • memory/3916-2037-0x00007FFA7B7B0000-0x00007FFA7C271000-memory.dmp

    Filesize

    10.8MB

  • memory/3916-2025-0x00007FFA7B7B3000-0x00007FFA7B7B5000-memory.dmp

    Filesize

    8KB

  • memory/5032-75-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-25-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-73-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-71-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-69-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-67-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-59-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-57-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-55-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-53-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-51-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-49-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-47-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-45-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-43-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-63-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-61-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-39-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-37-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-35-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-31-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-29-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-27-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-0-0x000000007522E000-0x000000007522F000-memory.dmp

    Filesize

    4KB

  • memory/5032-23-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-21-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-19-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-17-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-15-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-13-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-12-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-66-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-33-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-41-0x0000000007360000-0x00000000073C9000-memory.dmp

    Filesize

    420KB

  • memory/5032-11-0x0000000007360000-0x00000000073CE000-memory.dmp

    Filesize

    440KB

  • memory/5032-10-0x0000000005600000-0x000000000561E000-memory.dmp

    Filesize

    120KB

  • memory/5032-9-0x0000000006AC0000-0x0000000006B36000-memory.dmp

    Filesize

    472KB

  • memory/5032-8-0x0000000005760000-0x00000000057A8000-memory.dmp

    Filesize

    288KB

  • memory/5032-7-0x0000000075220000-0x00000000759D0000-memory.dmp

    Filesize

    7.7MB

  • memory/5032-2044-0x0000000075220000-0x00000000759D0000-memory.dmp

    Filesize

    7.7MB

  • memory/5032-6-0x000000007522E000-0x000000007522F000-memory.dmp

    Filesize

    4KB

  • memory/5032-5-0x0000000005370000-0x000000000537A000-memory.dmp

    Filesize

    40KB

  • memory/5032-4-0x0000000075220000-0x00000000759D0000-memory.dmp

    Filesize

    7.7MB

  • memory/5032-3-0x0000000005270000-0x0000000005302000-memory.dmp

    Filesize

    584KB

  • memory/5032-2-0x0000000005820000-0x0000000005DC4000-memory.dmp

    Filesize

    5.6MB

  • memory/5032-1-0x0000000000760000-0x00000000007D4000-memory.dmp

    Filesize

    464KB