Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/05/2024, 10:04

General

  • Target
    Telex-copy-pdf.jar
  • Size 559KB
  • Sample240506-l4b7hsbf49
  • SHA256 9ea17585514dd3c67c40965ed9a96bddea86fcd903230ba306767cb313f7819b
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • STRRAT

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

  • Drops startup file 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Modifies file permissions 1 TTPs 1 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.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 26 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:\Program Files (x86)\Common Files\Oracle\Java\javapath\java.exe
    java -jar C:\Users\Admin\AppData\Local\Temp\Telex-copy-pdf.jar
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4388
    • C:\Windows\system32\icacls.exe
      C:\Windows\system32\icacls.exe C:\ProgramData\Oracle\Java\.oracle_jre_usage /grant "everyone":(OI)(CI)M
      2⤵
      • Modifies file permissions
      PID:1332
    • C:\Program Files\Java\jre-1.8\bin\java.exe
      "C:\Program Files\Java\jre-1.8\bin\java.exe" -jar "C:\Users\Admin\Telex-copy-pdf.jar"
      2⤵
      • Drops startup file
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:232
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\Telex-copy-pdf.jar"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1832
        • C:\Windows\system32\schtasks.exe
          schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\Telex-copy-pdf.jar"
          4⤵
          • Creates scheduled task(s)
          PID:3828
      • 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\Telex-copy-pdf.jar"
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:2280
        • C:\Windows\SYSTEM32\cmd.exe
          cmd.exe /c "wmic /node:. /namespace:'\\root\cimv2' path win32_logicaldisk get volumeserialnumber /format:list"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:3476
          • C:\Windows\System32\Wbem\WMIC.exe
            wmic /node:. /namespace:'\\root\cimv2' path win32_logicaldisk get volumeserialnumber /format:list
            5⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2144
        • C:\Windows\SYSTEM32\cmd.exe
          cmd.exe /c "wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get caption,OSArchitecture /format:list"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2536
          • C:\Windows\System32\Wbem\WMIC.exe
            wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get caption,OSArchitecture /format:list
            5⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1012
        • C:\Windows\SYSTEM32\cmd.exe
          cmd.exe /c "wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get version /format:list"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:4776
          • C:\Windows\System32\Wbem\WMIC.exe
            wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get version /format:list
            5⤵
              PID:2948
          • C:\Windows\SYSTEM32\cmd.exe
            cmd.exe /c "wmic /node:localhost /namespace:'\\root\securitycenter2' path antivirusproduct get displayname /format:list"
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:3904
            • C:\Windows\System32\Wbem\WMIC.exe
              wmic /node:localhost /namespace:'\\root\securitycenter2' path antivirusproduct get displayname /format:list
              5⤵
                PID:2572

      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 16676f3bf04f52999b4ccc8b4e52117fb1490fd0afc96d83b58941400993fb8a
            • MD5 SHA1 SHA512

            3903daac9bc4a3b7.timestamp

            • Path C:\ProgramData\Oracle\Java\.oracle_jre_usage\3903daac9bc4a3b7.timestamp
            • Size 46B
            • SHA256 a4a6464cdb8c7799dfdde49cc42fd1247c4cb15fb34b34ea5f5522caa97319d1
            • MD5 SHA1 SHA512

            jna2762959105087609668.dll

            • Path C:\Users\Admin\AppData\Local\Temp\jna-63116079\jna2762959105087609668.dll
            • Size 241KB
            • SHA256 a66959bec2ef5af730198db9f3b3f7cab0d4ae70ce01bec02bf1d738e6d1ee7a
            • MD5 SHA1 SHA512 SSDEEP

            83aa4cc77f591dfc2374580bbd95f6ba_41e50f4a-4a76-42e1-a3df-51306e426307

            • Path C:\Users\Admin\AppData\Roaming\Microsoft\Crypto\RSA\S-1-5-21-540404634-651139247-2967210625-1000\83aa4cc77f591dfc2374580bbd95f6ba_41e50f4a-4a76-42e1-a3df-51306e426307
            • Size 45B
            • SHA256 11e6aca8e682c046c83b721eeb5c72c5ef03cb5936c60df6f4993511ddc61238
            • MD5 SHA1 SHA512

            Telex-copy-pdf.jar

            • Path C:\Users\Admin\Telex-copy-pdf.jar
            • Size 559KB
            • SHA256 9ea17585514dd3c67c40965ed9a96bddea86fcd903230ba306767cb313f7819b
            • 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/232-234-0x00000211F57F0000-0x00000211F57F1000-memory.dmp

            memory/2280-302-0x00000257AF070000-0x00000257AF071000-memory.dmp

            memory/2280-287-0x00000257AF070000-0x00000257AF071000-memory.dmp

            memory/4388-110-0x00000219DB190000-0x00000219DB1A0000-memory.dmp

            memory/4388-164-0x00000219DB020000-0x00000219DB030000-memory.dmp

            memory/4388-40-0x00000219DAD20000-0x00000219DAD21000-memory.dmp

            memory/4388-45-0x00000219DB080000-0x00000219DB090000-memory.dmp

            memory/4388-44-0x00000219DB070000-0x00000219DB080000-memory.dmp

            memory/4388-48-0x00000219DAD40000-0x00000219DAFB0000-memory.dmp

            memory/4388-52-0x00000219DB0B0000-0x00000219DB0C0000-memory.dmp

            memory/4388-51-0x00000219DAFB0000-0x00000219DAFC0000-memory.dmp

            memory/4388-50-0x00000219DB0A0000-0x00000219DB0B0000-memory.dmp

            memory/4388-59-0x00000219DB0D0000-0x00000219DB0E0000-memory.dmp

            memory/4388-58-0x00000219DB0C0000-0x00000219DB0D0000-memory.dmp

            memory/4388-57-0x00000219DAFE0000-0x00000219DAFF0000-memory.dmp

            memory/4388-56-0x00000219DAFD0000-0x00000219DAFE0000-memory.dmp

            memory/4388-55-0x00000219DAFC0000-0x00000219DAFD0000-memory.dmp

            memory/4388-64-0x00000219DB0E0000-0x00000219DB0F0000-memory.dmp

            memory/4388-63-0x00000219DAFF0000-0x00000219DB000000-memory.dmp

            memory/4388-49-0x00000219DB090000-0x00000219DB0A0000-memory.dmp

            memory/4388-67-0x00000219DB0F0000-0x00000219DB100000-memory.dmp

            memory/4388-66-0x00000219DB000000-0x00000219DB010000-memory.dmp

            memory/4388-70-0x00000219DB010000-0x00000219DB020000-memory.dmp

            memory/4388-71-0x00000219DB100000-0x00000219DB110000-memory.dmp

            memory/4388-75-0x00000219DB020000-0x00000219DB030000-memory.dmp

            memory/4388-78-0x00000219DB110000-0x00000219DB120000-memory.dmp

            memory/4388-77-0x00000219DB040000-0x00000219DB050000-memory.dmp

            memory/4388-76-0x00000219DB030000-0x00000219DB040000-memory.dmp

            memory/4388-81-0x00000219DB050000-0x00000219DB060000-memory.dmp

            memory/4388-83-0x00000219DB130000-0x00000219DB140000-memory.dmp

            memory/4388-84-0x00000219DB060000-0x00000219DB070000-memory.dmp

            memory/4388-82-0x00000219DB120000-0x00000219DB130000-memory.dmp

            memory/4388-90-0x00000219DB140000-0x00000219DB150000-memory.dmp

            memory/4388-89-0x00000219DB0A0000-0x00000219DB0B0000-memory.dmp

            memory/4388-88-0x00000219DB080000-0x00000219DB090000-memory.dmp

            memory/4388-87-0x00000219DB070000-0x00000219DB080000-memory.dmp

            memory/4388-92-0x00000219DB150000-0x00000219DB160000-memory.dmp

            memory/4388-91-0x00000219DB090000-0x00000219DB0A0000-memory.dmp

            memory/4388-97-0x00000219DB170000-0x00000219DB180000-memory.dmp

            memory/4388-96-0x00000219DB160000-0x00000219DB170000-memory.dmp

            memory/4388-95-0x00000219DB0B0000-0x00000219DB0C0000-memory.dmp

            memory/4388-101-0x00000219DAD20000-0x00000219DAD21000-memory.dmp

            memory/4388-103-0x00000219DAD20000-0x00000219DAD21000-memory.dmp

            memory/4388-107-0x00000219DB180000-0x00000219DB190000-memory.dmp

            memory/4388-106-0x00000219DB0D0000-0x00000219DB0E0000-memory.dmp

            memory/4388-105-0x00000219DB0C0000-0x00000219DB0D0000-memory.dmp

            memory/4388-109-0x00000219DB0E0000-0x00000219DB0F0000-memory.dmp

            memory/4388-2-0x00000219DAD40000-0x00000219DAFB0000-memory.dmp

            memory/4388-113-0x00000219DB1A0000-0x00000219DB1B0000-memory.dmp

            memory/4388-112-0x00000219DB0F0000-0x00000219DB100000-memory.dmp

            memory/4388-115-0x00000219DB100000-0x00000219DB110000-memory.dmp

            memory/4388-116-0x00000219DB1B0000-0x00000219DB1C0000-memory.dmp

            memory/4388-118-0x00000219DB110000-0x00000219DB120000-memory.dmp

            memory/4388-39-0x00000219DB060000-0x00000219DB070000-memory.dmp

            memory/4388-119-0x00000219DB1C0000-0x00000219DB1D0000-memory.dmp

            memory/4388-163-0x00000219DB010000-0x00000219DB020000-memory.dmp

            memory/4388-125-0x00000219DB1E0000-0x00000219DB1F0000-memory.dmp

            memory/4388-124-0x00000219DB130000-0x00000219DB140000-memory.dmp

            memory/4388-128-0x00000219DB1F0000-0x00000219DB200000-memory.dmp

            memory/4388-127-0x00000219DB140000-0x00000219DB150000-memory.dmp

            memory/4388-130-0x00000219DAD20000-0x00000219DAD21000-memory.dmp

            memory/4388-135-0x00000219DB200000-0x00000219DB210000-memory.dmp

            memory/4388-134-0x00000219DB150000-0x00000219DB160000-memory.dmp

            memory/4388-142-0x00000219DB170000-0x00000219DB180000-memory.dmp

            memory/4388-141-0x00000219DB160000-0x00000219DB170000-memory.dmp

            memory/4388-143-0x00000219DB210000-0x00000219DB220000-memory.dmp

            memory/4388-145-0x00000219DAD20000-0x00000219DAD21000-memory.dmp

            memory/4388-147-0x00000219DB220000-0x00000219DB230000-memory.dmp

            memory/4388-146-0x00000219DB180000-0x00000219DB190000-memory.dmp

            memory/4388-151-0x00000219DAD20000-0x00000219DAD21000-memory.dmp

            memory/4388-153-0x00000219DB190000-0x00000219DB1A0000-memory.dmp

            memory/4388-155-0x00000219DAD20000-0x00000219DAD21000-memory.dmp

            memory/4388-156-0x00000219DAD40000-0x00000219DAFB0000-memory.dmp

            memory/4388-159-0x00000219DAFD0000-0x00000219DAFE0000-memory.dmp

            memory/4388-178-0x00000219DB110000-0x00000219DB120000-memory.dmp

            memory/4388-177-0x00000219DB100000-0x00000219DB110000-memory.dmp

            memory/4388-33-0x00000219DB050000-0x00000219DB060000-memory.dmp

            memory/4388-176-0x00000219DB0F0000-0x00000219DB100000-memory.dmp

            memory/4388-175-0x00000219DB0D0000-0x00000219DB0E0000-memory.dmp

            memory/4388-174-0x00000219DB0C0000-0x00000219DB0D0000-memory.dmp

            memory/4388-173-0x00000219DB0A0000-0x00000219DB0B0000-memory.dmp

            memory/4388-172-0x00000219DB0B0000-0x00000219DB0C0000-memory.dmp

            memory/4388-171-0x00000219DB090000-0x00000219DB0A0000-memory.dmp

            memory/4388-170-0x00000219DB080000-0x00000219DB090000-memory.dmp

            memory/4388-169-0x00000219DB070000-0x00000219DB080000-memory.dmp

            memory/4388-168-0x00000219DB060000-0x00000219DB070000-memory.dmp

            memory/4388-167-0x00000219DB130000-0x00000219DB140000-memory.dmp

            memory/4388-166-0x00000219DB040000-0x00000219DB050000-memory.dmp

            memory/4388-165-0x00000219DB030000-0x00000219DB040000-memory.dmp

            memory/4388-122-0x00000219DB1D0000-0x00000219DB1E0000-memory.dmp

            memory/4388-121-0x00000219DB120000-0x00000219DB130000-memory.dmp

            memory/4388-162-0x00000219DB000000-0x00000219DB010000-memory.dmp

            memory/4388-161-0x00000219DAFF0000-0x00000219DB000000-memory.dmp

            memory/4388-160-0x00000219DAFE0000-0x00000219DAFF0000-memory.dmp

            memory/4388-158-0x00000219DAFC0000-0x00000219DAFD0000-memory.dmp

            memory/4388-157-0x00000219DAFB0000-0x00000219DAFC0000-memory.dmp

            memory/4388-31-0x00000219DB030000-0x00000219DB040000-memory.dmp

            memory/4388-32-0x00000219DB040000-0x00000219DB050000-memory.dmp

            memory/4388-30-0x00000219DB020000-0x00000219DB030000-memory.dmp

            memory/4388-25-0x00000219DB010000-0x00000219DB020000-memory.dmp

            memory/4388-23-0x00000219DB000000-0x00000219DB010000-memory.dmp

            memory/4388-21-0x00000219DAFF0000-0x00000219DB000000-memory.dmp

            memory/4388-18-0x00000219DAFD0000-0x00000219DAFE0000-memory.dmp

            memory/4388-19-0x00000219DAFE0000-0x00000219DAFF0000-memory.dmp

            memory/4388-17-0x00000219DAFC0000-0x00000219DAFD0000-memory.dmp

            memory/4388-13-0x00000219DAFB0000-0x00000219DAFC0000-memory.dmp