Analysis

  • max time kernel
    143s
  • max time network
    158s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    30/11/2022, 19:02

General

  • Target
    b13330d8e458c80c87cc8420ee96d9b1bc0e62db607c569fbe5ef7f1abd9bc31.exe
  • Size 25.9MB
  • Sample221130-xpvwvsfe33
  • SHA256 b13330d8e458c80c87cc8420ee96d9b1bc0e62db607c569fbe5ef7f1abd9bc31
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Shurk

    Shurk is an infostealer, written in C++ which appeared in 2021.

  • Shurk Stealer payload 5 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 4 IoCs
  • VMProtect packed file 7 IoCs

    Detects executables packed with VMProtect commercial packer.

  • Loads dropped DLL 11 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: CmdExeWriteProcessMemorySpam 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 41 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b13330d8e458c80c87cc8420ee96d9b1bc0e62db607c569fbe5ef7f1abd9bc31.exe
    "C:\Users\Admin\AppData\Local\Temp\b13330d8e458c80c87cc8420ee96d9b1bc0e62db607c569fbe5ef7f1abd9bc31.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1588
    • C:\ProgramData\start.exe
      "C:\ProgramData\start.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:1396
      • C:\Windows\system32\cmd.exe
        "C:\Windows\sysnative\cmd" /c "C:\Users\Admin\AppData\Local\Temp\1C87.tmp\1C88.tmp\1C89.bat C:\ProgramData\start.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1224
        • C:\ProgramData\Changer.exe
          Changer.exe -pskxLL0100xKKsjXJ19289 -dc:/ProgramData
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious behavior: CmdExeWriteProcessMemorySpam
          • Suspicious use of WriteProcessMemory
          PID:2024
          • C:\ProgramData\allSkinsData.exe
            "C:\ProgramData\allSkinsData.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:696
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
              C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
              6⤵
                PID:1508
              • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
                C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
                6⤵
                • Suspicious behavior: EnumeratesProcesses
                PID:112
            • C:\ProgramData\InventoryChangerLoader.exe
              "C:\ProgramData\InventoryChangerLoader.exe"
              5⤵
              • Executes dropped EXE
              • Modifies system certificate store
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:468
              • C:\Windows\System32\cmd.exe
                "C:\Windows\System32\cmd.exe" /C choice /C Y /N /D Y /T 2 & START "" "C:\ProgramData\InventoryChangerLoader.exe"
                6⤵
                • Suspicious use of WriteProcessMemory
                PID:1176
                • C:\Windows\system32\choice.exe
                  choice /C Y /N /D Y /T 2
                  7⤵
                    PID:2032

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            Changer.exe

            • Path C:\ProgramData\Changer.exe
            • Size 25.6MB
            • SHA256 47d02c42b8460c5c7031a32add3cb69ac6950f8f8f613e93a2e956721f42bdd7
            • MD5 SHA1 SHA512 SSDEEP

            Changer.exe

            • Path C:\ProgramData\Changer.exe
            • Size 25.6MB
            • SHA256 47d02c42b8460c5c7031a32add3cb69ac6950f8f8f613e93a2e956721f42bdd7
            • MD5 SHA1 SHA512 SSDEEP

            InventoryChangerLoader.exe

            • Path C:\ProgramData\InventoryChangerLoader.exe
            • Size 14.2MB
            • SHA256 0b1673433abfcb1257ff9db3c6f4d84cd3637ba9351fdabd889209798da2b228
            • MD5 SHA1 SHA512 SSDEEP

            InventoryChangerLoader.exe

            • Path C:\ProgramData\InventoryChangerLoader.exe
            • Size 14.2MB
            • SHA256 0b1673433abfcb1257ff9db3c6f4d84cd3637ba9351fdabd889209798da2b228
            • MD5 SHA1 SHA512 SSDEEP

            LoaderKernel.dll

            • Path C:\ProgramData\LoaderKernel.dll
            • Size 11.0MB
            • SHA256 692fdc37b881f8dc702a7817cc3af83011a5453f2e49ff206749e2503da45db1
            • MD5 SHA1 SHA512 SSDEEP

            allSkinsData.exe

            • Path C:\ProgramData\allSkinsData.exe
            • Size 1.4MB
            • SHA256 22fc083a0dc3b0b7f2275a8097e3a7c60fa6ebdd00ad80a90dcfc03f90e50644
            • MD5 SHA1 SHA512 SSDEEP

            allSkinsData.exe

            • Path C:\ProgramData\allSkinsData.exe
            • Size 1.4MB
            • SHA256 22fc083a0dc3b0b7f2275a8097e3a7c60fa6ebdd00ad80a90dcfc03f90e50644
            • MD5 SHA1 SHA512 SSDEEP

            start.exe

            • Path C:\ProgramData\start.exe
            • Size 88KB
            • SHA256 1270bb6be5ccb0754ac42b7362e93de56e10cae6e6ddaa60a77faf63696c5853
            • MD5 SHA1 SHA512 SSDEEP

            1C89.bat

            • Path C:\Users\Admin\AppData\Local\Temp\1C87.tmp\1C88.tmp\1C89.bat
            • Size 74B
            • SHA256 3407436e93523047a207cc6ae8d4eb17cc578b7687e41601b0347e7e42d3ba26
            • MD5 SHA1 SHA512

            InventoryChangerLoader.exe

            • Path \ProgramData\InventoryChangerLoader.exe
            • Size 14.2MB
            • SHA256 0b1673433abfcb1257ff9db3c6f4d84cd3637ba9351fdabd889209798da2b228
            • MD5 SHA1 SHA512 SSDEEP

            InventoryChangerLoader.exe

            • Path \ProgramData\InventoryChangerLoader.exe
            • Size 14.2MB
            • SHA256 0b1673433abfcb1257ff9db3c6f4d84cd3637ba9351fdabd889209798da2b228
            • MD5 SHA1 SHA512 SSDEEP

            InventoryChangerLoader.exe

            • Path \ProgramData\InventoryChangerLoader.exe
            • Size 14.2MB
            • SHA256 0b1673433abfcb1257ff9db3c6f4d84cd3637ba9351fdabd889209798da2b228
            • MD5 SHA1 SHA512 SSDEEP

            allSkinsData.exe

            • Path \ProgramData\allSkinsData.exe
            • Size 1.4MB
            • SHA256 22fc083a0dc3b0b7f2275a8097e3a7c60fa6ebdd00ad80a90dcfc03f90e50644
            • MD5 SHA1 SHA512 SSDEEP

            allSkinsData.exe

            • Path \ProgramData\allSkinsData.exe
            • Size 1.4MB
            • SHA256 22fc083a0dc3b0b7f2275a8097e3a7c60fa6ebdd00ad80a90dcfc03f90e50644
            • MD5 SHA1 SHA512 SSDEEP

            allSkinsData.exe

            • Path \ProgramData\allSkinsData.exe
            • Size 1.4MB
            • SHA256 22fc083a0dc3b0b7f2275a8097e3a7c60fa6ebdd00ad80a90dcfc03f90e50644
            • MD5 SHA1 SHA512 SSDEEP

            allSkinsData.exe

            • Path \ProgramData\allSkinsData.exe
            • Size 1.4MB
            • SHA256 22fc083a0dc3b0b7f2275a8097e3a7c60fa6ebdd00ad80a90dcfc03f90e50644
            • MD5 SHA1 SHA512 SSDEEP

            start.exe

            • Path \ProgramData\start.exe
            • Size 88KB
            • SHA256 1270bb6be5ccb0754ac42b7362e93de56e10cae6e6ddaa60a77faf63696c5853
            • MD5 SHA1 SHA512 SSDEEP

            start.exe

            • Path \ProgramData\start.exe
            • Size 88KB
            • SHA256 1270bb6be5ccb0754ac42b7362e93de56e10cae6e6ddaa60a77faf63696c5853
            • MD5 SHA1 SHA512 SSDEEP

            start.exe

            • Path \ProgramData\start.exe
            • Size 88KB
            • SHA256 1270bb6be5ccb0754ac42b7362e93de56e10cae6e6ddaa60a77faf63696c5853
            • MD5 SHA1 SHA512 SSDEEP

            start.exe

            • Path \ProgramData\start.exe
            • Size 88KB
            • SHA256 1270bb6be5ccb0754ac42b7362e93de56e10cae6e6ddaa60a77faf63696c5853
            • MD5 SHA1 SHA512 SSDEEP

            memory/112-83-0x0000000000400000-0x000000000047F000-memory.dmp

            memory/112-87-0x0000000000400000-0x000000000047F000-memory.dmp

            memory/112-101-0x0000000000400000-0x000000000047F000-memory.dmp

            memory/112-86-0x0000000000400000-0x000000000047F000-memory.dmp

            memory/468-94-0x0000000002250000-0x0000000002260000-memory.dmp

            memory/468-96-0x0000000002260000-0x000000000226A000-memory.dmp

            memory/468-102-0x000000001D237000-0x000000001D256000-memory.dmp

            memory/468-98-0x000000001E410000-0x000000001E4C0000-memory.dmp

            memory/468-80-0x00000000000D0000-0x0000000001D1A000-memory.dmp

            memory/468-90-0x000000001F320000-0x000000001FA0A000-memory.dmp

            memory/468-91-0x000000001FA10000-0x00000000200FE000-memory.dmp

            memory/468-92-0x0000000002580000-0x00000000025D0000-memory.dmp

            memory/468-93-0x0000000002210000-0x000000000223E000-memory.dmp

            memory/468-97-0x000000001D237000-0x000000001D256000-memory.dmp

            memory/468-95-0x00000000025D0000-0x000000000260A000-memory.dmp

            memory/696-79-0x00000000009B0000-0x0000000000B24000-memory.dmp

            memory/696-82-0x00000000005E0000-0x00000000005FE000-memory.dmp

            memory/1588-54-0x0000000075661000-0x0000000075663000-memory.dmp