Resubmissions

21/01/2025, 11:47

250121-nx1yea1rdw 10

21/01/2025, 11:41

250121-ntrkka1qax 10

Analysis

  • max time kernel
    146s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20241023-en
  • resource tags

    arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
  • submitted
    21/01/2025, 11:41

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.

  • Executes dropped EXE 10 IoCs
  • Loads dropped DLL 18 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • HTTP links in PDF interactive object 1 IoCs

    Detects HTTP links in interactive objects within PDF files.

  • 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 16 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
  • 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 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 20 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8a2abab20bf75ac19eaa73be3b09219d.exe
    "C:\Users\Admin\AppData\Local\Temp\8a2abab20bf75ac19eaa73be3b09219d.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2260
    • 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
      • Loads dropped DLL
      • Access Token Manipulation: Create Process with Token
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:9632
      • C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe
        "C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe" /SpecialRun 4101d8 9632
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:9696
    • 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
      • Loads dropped DLL
      • Access Token Manipulation: Create Process with Token
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:9724
      • C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe
        "C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe" /SpecialRun 4101d8 9724
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:9764
    • C:\Users\Admin\AppData\Local\Temp\8a2abab20bf75ac19eaa73be3b09219d.exe
      C:\Users\Admin\AppData\Local\Temp\8a2abab20bf75ac19eaa73be3b09219d.exe
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:9792
      • 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:9932
        • 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:10024
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpB895.tmp.bat""
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:9976
        • C:\Windows\SysWOW64\timeout.exe
          timeout 3
          4⤵
          • System Location Discovery: System Language Discovery
          • Delays execution with timeout.exe
          PID:10016
        • 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
          • Loads dropped DLL
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:10052
          • 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
            • Loads dropped DLL
            • Access Token Manipulation: Create Process with Token
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:9960
            • C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe
              "C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe" /SpecialRun 4101d8 9960
              6⤵
              • Executes dropped EXE
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:9984
          • 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
            • Loads dropped DLL
            • Access Token Manipulation: Create Process with Token
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:10024
            • C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe
              "C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe" /SpecialRun 4101d8 10024
              6⤵
              • Executes dropped EXE
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:2272
          • 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:2976

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • 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\tmpB895.tmp.bat

    Filesize

    161B

    MD5

    1fa5c33d3abc40c0cbd166fb86e1da57

    SHA1

    a56bf4f519b961d67bfd864e99ec431fa812556d

    SHA256

    ebf83e0adb5f9500882fbf53bb9cd52fdd18a17df13dd92377081776d295e14b

    SHA512

    3889fa1c582c466a4e382048c6397511ee2aa9a4ab2a747b4a9f9d3c29044f5bac50a43ac276228dbc84221c604dbaab2e5d5d5a901a60ac196353aee18a6576

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

    Filesize

    88KB

    MD5

    17fc12902f4769af3a9271eb4e2dacce

    SHA1

    9a4a1581cc3971579574f837e110f3bd6d529dab

    SHA256

    29ae7b30ed8394c509c561f6117ea671ec412da50d435099756bbb257fafb10b

    SHA512

    036e0d62490c26dee27ef54e514302e1cc8a14de8ce3b9703bf7caf79cfae237e442c27a0edcf2c4fd41af4195ba9ed7e32e894767ce04467e79110e89522e4a

  • memory/2260-49-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-43-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-5-0x0000000007CB0000-0x0000000007D1E000-memory.dmp

    Filesize

    440KB

  • memory/2260-31-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-29-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-27-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-11-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-9-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-69-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-67-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-65-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-63-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-61-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-59-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-57-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-7-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-55-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-45-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-51-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-0-0x0000000074C0E000-0x0000000074C0F000-memory.dmp

    Filesize

    4KB

  • memory/2260-4-0x0000000000640000-0x0000000000688000-memory.dmp

    Filesize

    288KB

  • memory/2260-47-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-53-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-41-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-39-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-37-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-35-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-33-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-6-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-25-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-23-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-21-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-19-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-17-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-15-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-13-0x0000000007CB0000-0x0000000007D19000-memory.dmp

    Filesize

    420KB

  • memory/2260-3-0x0000000074C00000-0x00000000752EE000-memory.dmp

    Filesize

    6.9MB

  • memory/2260-1-0x0000000000A70000-0x0000000000AE4000-memory.dmp

    Filesize

    464KB

  • memory/2260-2046-0x0000000074C00000-0x00000000752EE000-memory.dmp

    Filesize

    6.9MB

  • memory/2260-2-0x0000000074C00000-0x00000000752EE000-memory.dmp

    Filesize

    6.9MB

  • memory/2976-4102-0x0000000000400000-0x0000000000418000-memory.dmp

    Filesize

    96KB

  • memory/9792-2045-0x0000000000400000-0x0000000000418000-memory.dmp

    Filesize

    96KB

  • memory/10052-2059-0x0000000000AB0000-0x0000000000B24000-memory.dmp

    Filesize

    464KB