Resubmissions

21-01-2025 11:37

250121-nrfehs1pby 10

12-07-2021 19:05

210712-p4pm4lvw8x 10

Analysis

  • max time kernel
    119s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    21-01-2025 11:37

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 1 IoCs
  • Detected Nirsoft tools 1 IoCs

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

  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 9 IoCs
  • Suspicious use of SetThreadContext 1 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 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 11 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 13 IoCs
  • Suspicious use of AdjustPrivilegeToken 11 IoCs
  • Suspicious use of WriteProcessMemory 45 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:2896
    • 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:6864
      • C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe
        "C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe" /SpecialRun 4101d8 6864
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:6932
    • 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:6956
      • C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe
        "C:\Users\Admin\AppData\Local\Temp\AdvancedRun.exe" /SpecialRun 4101d8 6956
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:6996
    • 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:7024
      • 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:4884
        • 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:5068
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpA3BE.tmp.bat""
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:5012
        • C:\Windows\SysWOW64\timeout.exe
          timeout 3
          4⤵
          • System Location Discovery: System Language Discovery
          • Delays execution with timeout.exe
          PID:2600
        • C:\Users\Admin\AppData\Local\Temp\Acrobat Reader.exe
          "C:\Users\Admin\AppData\Local\Temp\Acrobat Reader.exe"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:4400

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpA3BE.tmp.bat

    Filesize

    161B

    MD5

    260a5c31f85dc553a14b6256cb92c4d2

    SHA1

    7808a42cf6e40536935708cce131f9296a4c1752

    SHA256

    ea5e869da76b8bf11560473f48464216788b04b8a01663a23f7925bab9ea84f4

    SHA512

    5d04ee275f6b1ebf5bd42f74381d16aae0cb577a56d5c5dd4080988363ef60b256adec2db3f14471735551f158550bc0375efd7dd5b375bdc9c1305fdafa89ad

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

    Filesize

    455KB

    MD5

    8a2abab20bf75ac19eaa73be3b09219d

    SHA1

    c0fa652bb151644bf76b55f3c9d68cb5e8d7faf3

    SHA256

    866ac65940057d6e1a125eda23a12d6743d75e6ff3a74ff6d53debb3fe90a368

    SHA512

    e8842b9f47a5dce906ddca3dfbb608eba660c80364ed0b02b48c33e161df3e95226d713177733e7591cc7eccecb3f48e1a731576a90d6fbda194de98de5495c9

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

    Filesize

    88KB

    MD5

    17fc12902f4769af3a9271eb4e2dacce

    SHA1

    9a4a1581cc3971579574f837e110f3bd6d529dab

    SHA256

    29ae7b30ed8394c509c561f6117ea671ec412da50d435099756bbb257fafb10b

    SHA512

    036e0d62490c26dee27ef54e514302e1cc8a14de8ce3b9703bf7caf79cfae237e442c27a0edcf2c4fd41af4195ba9ed7e32e894767ce04467e79110e89522e4a

  • memory/2896-58-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-6-0x0000000004C70000-0x0000000004CDE000-memory.dmp

    Filesize

    440KB

  • memory/2896-5-0x0000000000750000-0x0000000000798000-memory.dmp

    Filesize

    288KB

  • memory/2896-68-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-8-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-7-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-10-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-14-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-16-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-26-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-24-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-22-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-20-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-18-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-12-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-66-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-30-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-32-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-34-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-0-0x00000000743FE000-0x00000000743FF000-memory.dmp

    Filesize

    4KB

  • memory/2896-1-0x0000000000030000-0x00000000000A4000-memory.dmp

    Filesize

    464KB

  • memory/2896-4-0x00000000743F0000-0x0000000074ADE000-memory.dmp

    Filesize

    6.9MB

  • memory/2896-28-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-64-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-62-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-60-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-56-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-54-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-52-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-50-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-48-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-46-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-44-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-42-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-40-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-38-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-36-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-3-0x00000000743FE000-0x00000000743FF000-memory.dmp

    Filesize

    4KB

  • memory/2896-2047-0x00000000743F0000-0x0000000074ADE000-memory.dmp

    Filesize

    6.9MB

  • memory/2896-70-0x0000000004C70000-0x0000000004CD9000-memory.dmp

    Filesize

    420KB

  • memory/2896-2-0x00000000743F0000-0x0000000074ADE000-memory.dmp

    Filesize

    6.9MB

  • memory/4400-2060-0x0000000000980000-0x00000000009F4000-memory.dmp

    Filesize

    464KB

  • memory/7024-2046-0x0000000000400000-0x0000000000418000-memory.dmp

    Filesize

    96KB