Analysis

  • max time kernel
    149s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    27-11-2024 02:51

General

  • Target

    a1799891e1d46497c6aff689f8aacda09ef5e825dd700d6fce2aa3e4ddf638b6.js

  • Size

    1.5MB

  • MD5

    54c0bfbfcf8e54a84687ad887f352661

  • SHA1

    72396d5febe2bfaac6e5d32b68b7e248af5b5939

  • SHA256

    a1799891e1d46497c6aff689f8aacda09ef5e825dd700d6fce2aa3e4ddf638b6

  • SHA512

    61f7783c27ff34f112a721cfee73218229eedc93853b60e3544ff6f9642f7a74e77f11dfcee2f7380af34030ae4a4f84850d038d357ee0b9fb5ba9a8c3ec91a2

  • SSDEEP

    12288:LtVY8xmih31uN1CJ56AmZxZYXiu5rRUSzBZK+9wmecq4uDgnA9HceADyr0RwKNCt:xVKJN4JYAL7r1jgcBObQ3K08YzmYs

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default-NOV-24

C2

chongmei33.publicvm.com:2703

chongmei33.publicvm.com:7031

jinvestments.duckdns.org:2703

jinvestments.duckdns.org:7031

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    true

  • install_file

    Windows Update.exe

  • install_folder

    %AppData%

aes.plain

Extracted

Family

wshrat

C2

http://chongmei33.publicvm.com:7044

Signatures

  • AsyncRat

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

  • Asyncrat family
  • WSHRAT

    WSHRAT is a variant of Houdini worm and has vbs and js variants.

  • Wshrat family
  • Blocklisted process makes network request 24 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 5 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Command and Scripting Interpreter: JavaScript 1 TTPs
  • 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
  • Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

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

  • Script User-Agent 23 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious behavior: EnumeratesProcesses 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\a1799891e1d46497c6aff689f8aacda09ef5e825dd700d6fce2aa3e4ddf638b6.js
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2640
    • C:\Windows\System32\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\adobe.js"
      2⤵
      • Drops startup file
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:2472
      • C:\Windows\System32\wscript.exe
        "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\adobe.js"
        3⤵
        • Blocklisted process makes network request
        • Drops startup file
        • Adds Run key to start application
        PID:2808
    • C:\Windows\System32\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\svchost.js"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2744
      • C:\Users\Admin\AppData\Local\Temp\Ucopa.exe
        "C:\Users\Admin\AppData\Local\Temp\Ucopa.exe"
        3⤵
        • 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:2732
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\vDKSLmXZAli.exe"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:696
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vDKSLmXZAli" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3A9.tmp"
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:1436
        • C:\Users\Admin\AppData\Local\Temp\Ucopa.exe
          "C:\Users\Admin\AppData\Local\Temp\Ucopa.exe"
          4⤵
          • Executes dropped EXE
          PID:2420
        • C:\Users\Admin\AppData\Local\Temp\Ucopa.exe
          "C:\Users\Admin\AppData\Local\Temp\Ucopa.exe"
          4⤵
          • Executes dropped EXE
          PID:1932
        • C:\Users\Admin\AppData\Local\Temp\Ucopa.exe
          "C:\Users\Admin\AppData\Local\Temp\Ucopa.exe"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1632
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Windows Update" /tr '"C:\Users\Admin\AppData\Roaming\Windows Update.exe"' & exit
            5⤵
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:1488
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /create /f /sc onlogon /rl highest /tn "Windows Update" /tr '"C:\Users\Admin\AppData\Roaming\Windows Update.exe"'
              6⤵
              • System Location Discovery: System Language Discovery
              • Scheduled Task/Job: Scheduled Task
              PID:1536
          • C:\Windows\SysWOW64\cmd.exe
            cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp145B.tmp.bat""
            5⤵
            • Loads dropped DLL
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:412
            • C:\Windows\SysWOW64\timeout.exe
              timeout 3
              6⤵
              • System Location Discovery: System Language Discovery
              • Delays execution with timeout.exe
              PID:1948
            • C:\Users\Admin\AppData\Roaming\Windows Update.exe
              "C:\Users\Admin\AppData\Roaming\Windows Update.exe"
              6⤵
              • 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:944
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\vDKSLmXZAli.exe"
                7⤵
                • Command and Scripting Interpreter: PowerShell
                • System Location Discovery: System Language Discovery
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:3024
              • C:\Windows\SysWOW64\schtasks.exe
                "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vDKSLmXZAli" /XML "C:\Users\Admin\AppData\Local\Temp\tmp80E3.tmp"
                7⤵
                • System Location Discovery: System Language Discovery
                • Scheduled Task/Job: Scheduled Task
                PID:3012
              • C:\Users\Admin\AppData\Roaming\Windows Update.exe
                "C:\Users\Admin\AppData\Roaming\Windows Update.exe"
                7⤵
                • Executes dropped EXE
                • System Location Discovery: System Language Discovery
                • Suspicious use of AdjustPrivilegeToken
                PID:1504

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    613KB

    MD5

    3a581f3b380d9e4f8ad2eb3962398b90

    SHA1

    c1842a583d793972040d03a4901b0b63f0e97d65

    SHA256

    7ac3a47cb8196aae573d5855ce43ac0498f18281e4b9ff626f53eaf220c1fdc5

    SHA512

    7b03db127ccb8d1f98f465a52a82187cdb12ce17b651353db25a29d59e37cc1119aa9454d05a04853e5d0ffbbdba45833a10ea6e08e10b13878f7f5b7acb3a2e

  • C:\Users\Admin\AppData\Local\Temp\adobe.js

    Filesize

    305KB

    MD5

    98d77a83c389bb812e0838c391b73258

    SHA1

    f543f656670ab8abfc78b06d8331b4c4a70c3df2

    SHA256

    177fa36898fbdb539116997091efff95984ccbd64a8a2b022f0557424a6fd915

    SHA512

    5f0bdc882df3a6eb86645d765b5c7d320c62ac278e8bee43e11742236dc60d1209ee7be50e7540ac94f710ab46280f5e5b46f8913d30a23c25b1403de4842ea8

  • C:\Users\Admin\AppData\Local\Temp\svchost.js

    Filesize

    839KB

    MD5

    198a3620008e85b96e716688e6c9f8bb

    SHA1

    e61d0552a7aa2b4815e21fd955e335679af56d5e

    SHA256

    a28853b5fb6657f6491856b90e64381c197a3f7aa40a0a09199a5e9d61502bd3

    SHA512

    fa3d09906173ea98277266366daf5b47c9d44387b83fda3a1ec5a1ef6dda08b20f2b6344b6138421a0b98f16e44e0b147280ef490d9902ddfdca1268590cfbbc

  • C:\Users\Admin\AppData\Local\Temp\tmp145B.tmp.bat

    Filesize

    158B

    MD5

    0ba7ea9ce70b7286b67ae5baf04744cf

    SHA1

    5d56830b925798515d97d5d2e4737962b3ae0d18

    SHA256

    94dbf7a8d844d2a3708db224170eca62a86e6d9bba25e92333000a3dcb5702c5

    SHA512

    702e116d1a79c28d2dfdbbd78ad3e0f9cdce3027c538b08dcd09655efc9d348a59b62fea1ae586fed12ecbed270e00dc5b23305a893afe67dceea03ecc4cd952

  • C:\Users\Admin\AppData\Local\Temp\tmp3A9.tmp

    Filesize

    1KB

    MD5

    deb5f064893d024cd779a343feffb0cb

    SHA1

    18ca245ba54563860bc1e9cd2e20ba22d3fe41ad

    SHA256

    56af708495652f4932f20dfd3e88176a7d4e0acf12959cf7882f2a87b852849b

    SHA512

    bb308b9f925779815729591ae8b763cedb11c99595a5a9760b0201661c45b535a637cc4bf56ac61b4aef1c6da1a835b11e66ccc9f4fc97afb0005c90b68bba29

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

    Filesize

    7KB

    MD5

    e77f2d8679b80295a5348920f6f1fe47

    SHA1

    25b4868f7cdb0eb02b47b0546a1c0ab6176a79cb

    SHA256

    f730820598ebf9b82122f665fa5f56bd4d54f1f9c34e39485e05bf9350fc0806

    SHA512

    7db08f625afdbb070e82514a581067e520091f7e410f10c1b0a45b2514f3166bbb44679654148facf70f0fc476314297f6982f1d3bb75203db872d9cf7504cc2

  • memory/944-65-0x00000000012C0000-0x000000000135C000-memory.dmp

    Filesize

    624KB

  • memory/1504-81-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1504-84-0x0000000000400000-0x0000000000412000-memory.dmp

    Filesize

    72KB

  • memory/1504-85-0x0000000000400000-0x0000000000412000-memory.dmp

    Filesize

    72KB

  • memory/1632-47-0x0000000000400000-0x0000000000412000-memory.dmp

    Filesize

    72KB

  • memory/1632-46-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1632-44-0x0000000000400000-0x0000000000412000-memory.dmp

    Filesize

    72KB

  • memory/1632-42-0x0000000000400000-0x0000000000412000-memory.dmp

    Filesize

    72KB

  • memory/1632-40-0x0000000000400000-0x0000000000412000-memory.dmp

    Filesize

    72KB

  • memory/1632-49-0x0000000000400000-0x0000000000412000-memory.dmp

    Filesize

    72KB

  • memory/1632-51-0x0000000000400000-0x0000000000412000-memory.dmp

    Filesize

    72KB

  • memory/1632-38-0x0000000000400000-0x0000000000412000-memory.dmp

    Filesize

    72KB

  • memory/2732-23-0x00000000046C0000-0x0000000004716000-memory.dmp

    Filesize

    344KB

  • memory/2732-21-0x0000000000710000-0x000000000072C000-memory.dmp

    Filesize

    112KB

  • memory/2732-20-0x00000000002D0000-0x000000000036C000-memory.dmp

    Filesize

    624KB