Resubmissions

21/01/2025, 11:47

250121-nx1yea1rdw 10

21/01/2025, 11:41

250121-ntrkka1qax 10

Analysis

  • max time kernel
    299s
  • max time network
    306s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-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.

  • 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 20 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 sh $MOZILLA\nPLUGIN %SIGILL% "SIGTERM|DESTROY|SIGKILL"
    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:2100
    • 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:3420
      • C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe
        "C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe" /SpecialRun 4101d8 3420
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3516
    • 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:3552
      • C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe
        "C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe" /SpecialRun 4101d8 3552
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3616
    • 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:3660
      • 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:3904
        • 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:4012
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp6E.tmp.bat""
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3972
        • C:\Windows\SysWOW64\timeout.exe
          timeout 3
          4⤵
          • System Location Discovery: System Language Discovery
          • Delays execution with timeout.exe
          PID:4032
        • 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:4064
          • 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:9064
            • C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe
              "C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe" /SpecialRun 4101d8 9064
              6⤵
              • Executes dropped EXE
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:9128
          • 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:9152
            • C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe
              "C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe" /SpecialRun 4101d8 9152
              6⤵
              • Executes dropped EXE
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:9188
          • 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:5904

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    88KB

    MD5

    17fc12902f4769af3a9271eb4e2dacce

    SHA1

    9a4a1581cc3971579574f837e110f3bd6d529dab

    SHA256

    29ae7b30ed8394c509c561f6117ea671ec412da50d435099756bbb257fafb10b

    SHA512

    036e0d62490c26dee27ef54e514302e1cc8a14de8ce3b9703bf7caf79cfae237e442c27a0edcf2c4fd41af4195ba9ed7e32e894767ce04467e79110e89522e4a

  • C:\Users\Admin\AppData\Local\Temp\tmp6E.tmp.bat

    Filesize

    159B

    MD5

    390f512f1c0c85539b0a0168ea9568aa

    SHA1

    ee0b3407316303b6d412c22c5feaca8ca0c87d9c

    SHA256

    33b276480b054ebe214df9b11aab74d50b7132e509f20542307b6d37ecd6c8f5

    SHA512

    29eb1f47c933b3315730d52231178e81aba19e65dffe347a6e4ebb24e24644e8954ccd83d846622284fab2c707f0a0de46f438dc43478c7a571fefad268b6146

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

    Filesize

    455KB

    MD5

    8a2abab20bf75ac19eaa73be3b09219d

    SHA1

    c0fa652bb151644bf76b55f3c9d68cb5e8d7faf3

    SHA256

    866ac65940057d6e1a125eda23a12d6743d75e6ff3a74ff6d53debb3fe90a368

    SHA512

    e8842b9f47a5dce906ddca3dfbb608eba660c80364ed0b02b48c33e161df3e95226d713177733e7591cc7eccecb3f48e1a731576a90d6fbda194de98de5495c9

  • memory/2100-46-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-4-0x00000000743A0000-0x0000000074A8E000-memory.dmp

    Filesize

    6.9MB

  • memory/2100-5-0x00000000009F0000-0x0000000000A38000-memory.dmp

    Filesize

    288KB

  • memory/2100-6-0x0000000005BB0000-0x0000000005C1E000-memory.dmp

    Filesize

    440KB

  • memory/2100-12-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-20-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-30-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-32-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-40-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-60-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-68-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-70-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-64-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-62-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-58-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-56-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-55-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-50-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-48-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-0-0x00000000743AE000-0x00000000743AF000-memory.dmp

    Filesize

    4KB

  • memory/2100-38-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-44-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-43-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-36-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-34-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-66-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-52-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-28-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-26-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-24-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-22-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-18-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-16-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-14-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-10-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-8-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-7-0x0000000005BB0000-0x0000000005C19000-memory.dmp

    Filesize

    420KB

  • memory/2100-3-0x00000000743AE000-0x00000000743AF000-memory.dmp

    Filesize

    4KB

  • memory/2100-1-0x0000000000DC0000-0x0000000000E34000-memory.dmp

    Filesize

    464KB

  • memory/2100-2047-0x00000000743A0000-0x0000000074A8E000-memory.dmp

    Filesize

    6.9MB

  • memory/2100-2-0x00000000743A0000-0x0000000074A8E000-memory.dmp

    Filesize

    6.9MB

  • memory/3660-2046-0x0000000000400000-0x0000000000418000-memory.dmp

    Filesize

    96KB

  • memory/4064-2060-0x0000000000970000-0x00000000009E4000-memory.dmp

    Filesize

    464KB

  • memory/5904-4103-0x0000000000400000-0x0000000000418000-memory.dmp

    Filesize

    96KB