Analysis

  • max time kernel
    147s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240910-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240910-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/09/2024, 01:19

General

  • Target
    461d7bbff67fa45958735a68976e83143b072eb35f2275086e99212d8fd165cb.exe
  • Size 480KB
  • Sample240928-bpqq9azamn
  • SHA256 461d7bbff67fa45958735a68976e83143b072eb35f2275086e99212d8fd165cb
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • strrat

C2
  • 93.185.156.124:1912

  • 127.0.0.1:1912

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

Signatures

  • STRRAT

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

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 2 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.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry class 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 3 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\461d7bbff67fa45958735a68976e83143b072eb35f2275086e99212d8fd165cb.exe
    "C:\Users\Admin\AppData\Local\Temp\461d7bbff67fa45958735a68976e83143b072eb35f2275086e99212d8fd165cb.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1548
    • C:\Users\Admin\AppData\Local\Temp\461d7bbff67fa45958735a68976e83143b072eb35f2275086e99212d8fd165cb.exe
      "C:\Users\Admin\AppData\Local\Temp\461d7bbff67fa45958735a68976e83143b072eb35f2275086e99212d8fd165cb.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1904
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c start "" "C:\Users\Admin\AppData\Local\Temp\A.jar"
        3⤵
        • Checks computer location settings
        • System Location Discovery: System Language Discovery
        • Modifies registry class
        • Suspicious use of WriteProcessMemory
        PID:3796
        • 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\A.jar"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1732
          • C:\Program Files\Java\jre-1.8\bin\java.exe
            "C:\Program Files\Java\jre-1.8\bin\java.exe" -jar "C:\Users\Admin\A.jar"
            5⤵
            • Drops startup file
            • Loads dropped DLL
            • Adds Run key to start application
            • Suspicious use of WriteProcessMemory
            PID:3768
            • C:\Windows\SYSTEM32\cmd.exe
              cmd /c schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\A.jar"
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:1360
              • C:\Windows\system32\schtasks.exe
                schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\A.jar"
                7⤵
                • Scheduled Task/Job: Scheduled Task
                PID:1284
            • 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\A.jar"
              6⤵
              • Loads dropped DLL
              • Suspicious use of WriteProcessMemory
              PID:1464
              • 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:1776
              • 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:2888
                • 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:3028
              • 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:4796
                • C:\Windows\System32\Wbem\WMIC.exe
                  wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get version /format:list
                  8⤵
                    PID:1124
                • 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:4320
                  • C:\Windows\System32\Wbem\WMIC.exe
                    wmic /node:localhost /namespace:'\\root\securitycenter2' path antivirusproduct get displayname /format:list
                    8⤵
                      PID:3968

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            A.jar

            • Path C:\Users\Admin\AppData\Local\Temp\A.jar
            • Size 92KB
            • SHA256 7e5adae008afee158168b1943fcc41157c7de63ab4792cc5eba8d1830edd6d65
            • MD5 SHA1 SHA512 SSDEEP

            jna7778665112730782060.dll

            • Path C:\Users\Admin\AppData\Local\Temp\jna-63116079\jna7778665112730782060.dll
            • Size 241KB
            • SHA256 a66959bec2ef5af730198db9f3b3f7cab0d4ae70ce01bec02bf1d738e6d1ee7a
            • MD5 SHA1 SHA512 SSDEEP

            83aa4cc77f591dfc2374580bbd95f6ba_83e33dcf-e635-4313-9cdc-036589dffc77

            • Path C:\Users\Admin\AppData\Roaming\Microsoft\Crypto\RSA\S-1-5-21-2629364133-3182087385-364449604-1000\83aa4cc77f591dfc2374580bbd95f6ba_83e33dcf-e635-4313-9cdc-036589dffc77
            • Size 45B
            • SHA256 11e6aca8e682c046c83b721eeb5c72c5ef03cb5936c60df6f4993511ddc61238
            • MD5 SHA1 SHA512

            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/1464-176-0x0000027A0DAA0000-0x0000027A0DAA1000-memory.dmp

            memory/1548-5-0x0000000074DA0000-0x0000000075550000-memory.dmp

            memory/1548-10-0x0000000006050000-0x00000000060B0000-memory.dmp

            memory/1548-11-0x0000000008850000-0x00000000088EC000-memory.dmp

            memory/1548-9-0x0000000074DA0000-0x0000000075550000-memory.dmp

            memory/1548-8-0x0000000074DAE000-0x0000000074DAF000-memory.dmp

            memory/1548-17-0x0000000074DA0000-0x0000000075550000-memory.dmp

            memory/1548-7-0x0000000005150000-0x0000000005160000-memory.dmp

            memory/1548-0-0x0000000074DAE000-0x0000000074DAF000-memory.dmp

            memory/1548-6-0x00000000062C0000-0x0000000006334000-memory.dmp

            memory/1548-4-0x0000000004C50000-0x0000000004C5A000-memory.dmp

            memory/1548-3-0x0000000004C90000-0x0000000004D22000-memory.dmp

            memory/1548-2-0x00000000051A0000-0x0000000005744000-memory.dmp

            memory/1548-1-0x00000000001D0000-0x000000000024C000-memory.dmp

            memory/1732-22-0x000002970B560000-0x000002970B7D0000-memory.dmp

            memory/1732-98-0x0000029709C70000-0x0000029709C71000-memory.dmp

            memory/1732-99-0x000002970B560000-0x000002970B7D0000-memory.dmp

            memory/1732-97-0x0000029709C70000-0x0000029709C71000-memory.dmp

            memory/1732-94-0x0000029709C70000-0x0000029709C71000-memory.dmp

            memory/1732-82-0x0000029709C70000-0x0000029709C71000-memory.dmp

            memory/1732-76-0x0000029709C70000-0x0000029709C71000-memory.dmp

            memory/1732-73-0x0000029709C70000-0x0000029709C71000-memory.dmp

            memory/1732-45-0x0000029709C70000-0x0000029709C71000-memory.dmp

            memory/1904-14-0x0000000000400000-0x000000000041B000-memory.dmp

            memory/1904-12-0x0000000000400000-0x000000000041B000-memory.dmp

            memory/3768-124-0x0000023C4C3E0000-0x0000023C4C3E1000-memory.dmp

            memory/3768-150-0x0000023C4C3E0000-0x0000023C4C3E1000-memory.dmp