Analysis

  • max time kernel
    122s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    23/05/2021, 14:14

General

  • Target
    31dac136c58a578cd442f036cfdcff9c.exe
  • Size 837KB
  • Sample210523-1vbqsr48g2
  • SHA256 a6fad6eda99cf8a1097f5222d9183323be396ad6ae37e3dfc364d196cf7f64fd
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • raccoon

Botnet
  • 1d76a465540f6a904ac9f1310fe3a3824b5b4549

Attributes
  • url4cnc

    https://tttttt.me/kokajakprozak

rc4.plain
rc4.plain

Signatures

  • Deletes Windows Defender Definitions 2 TTPs 1 IoCs

    Uses mpcmdrun utility to delete all AV definitions.

  • Raccoon

    Simple but powerful infostealer which was very active in 2019.

  • Disables Task Manager via registry modification
  • Downloads MZ/PE file
  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 20 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Looks up external IP address via web service 3 IoCs

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

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Delays execution with timeout.exe 1 IoCs
  • Modifies system certificate store 2 TTPs 7 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\31dac136c58a578cd442f036cfdcff9c.exe
    "C:\Users\Admin\AppData\Local\Temp\31dac136c58a578cd442f036cfdcff9c.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1640
    • C:\Users\Admin\AppData\Local\Temp\31dac136c58a578cd442f036cfdcff9c.exe
      "C:\Users\Admin\AppData\Local\Temp\31dac136c58a578cd442f036cfdcff9c.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1556
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\f9eb00a0-53d3-421b-b019-1ad054413768" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1116
      • C:\Users\Admin\AppData\Local\Temp\31dac136c58a578cd442f036cfdcff9c.exe
        "C:\Users\Admin\AppData\Local\Temp\31dac136c58a578cd442f036cfdcff9c.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:668
        • C:\Users\Admin\AppData\Local\Temp\31dac136c58a578cd442f036cfdcff9c.exe
          "C:\Users\Admin\AppData\Local\Temp\31dac136c58a578cd442f036cfdcff9c.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Loads dropped DLL
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1144
          • C:\Users\Admin\AppData\Local\23748f15-7b0a-4ac5-8710-d170f81f4579\updatewin1.exe
            "C:\Users\Admin\AppData\Local\23748f15-7b0a-4ac5-8710-d170f81f4579\updatewin1.exe"
            5⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of WriteProcessMemory
            PID:1840
            • C:\Users\Admin\AppData\Local\23748f15-7b0a-4ac5-8710-d170f81f4579\updatewin1.exe
              "C:\Users\Admin\AppData\Local\23748f15-7b0a-4ac5-8710-d170f81f4579\updatewin1.exe" --Admin
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Suspicious use of WriteProcessMemory
              PID:1500
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                powershell -Command Set-ExecutionPolicy -Scope CurrentUser RemoteSigned
                7⤵
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1680
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                powershell -NoProfile -ExecutionPolicy Bypass -Command "& {Start-Process PowerShell -ArgumentList '-NoProfile -ExecutionPolicy Bypass -File ""C:\Users\Admin\AppData\Local\script.ps1""' -Verb RunAs}"
                7⤵
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1376
                • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -ExecutionPolicy Bypass -File "C:\Users\Admin\AppData\Local\script.ps1
                  8⤵
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1068
              • C:\Program Files\Windows Defender\mpcmdrun.exe
                "C:\Program Files\Windows Defender\mpcmdrun.exe" -removedefinitions -all
                7⤵
                • Deletes Windows Defender Definitions
                PID:912
              • C:\Windows\SysWOW64\cmd.exe
                cmd /c ""C:\Users\Admin\AppData\Local\Temp\delself.bat""
                7⤵
                  PID:1116
            • C:\Users\Admin\AppData\Local\23748f15-7b0a-4ac5-8710-d170f81f4579\updatewin2.exe
              "C:\Users\Admin\AppData\Local\23748f15-7b0a-4ac5-8710-d170f81f4579\updatewin2.exe"
              5⤵
              • Drops file in Drivers directory
              • Executes dropped EXE
              PID:1136
            • C:\Users\Admin\AppData\Local\23748f15-7b0a-4ac5-8710-d170f81f4579\5.exe
              "C:\Users\Admin\AppData\Local\23748f15-7b0a-4ac5-8710-d170f81f4579\5.exe"
              5⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Modifies system certificate store
              PID:1012
              • C:\Windows\SysWOW64\cmd.exe
                cmd.exe /C timeout /T 10 /NOBREAK > Nul & Del /f /q "C:\Users\Admin\AppData\Local\23748f15-7b0a-4ac5-8710-d170f81f4579\5.exe"
                6⤵
                  PID:1608
                  • C:\Windows\SysWOW64\timeout.exe
                    timeout /T 10 /NOBREAK
                    7⤵
                    • Delays execution with timeout.exe
                    PID:568

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            memory/1068-154-0x0000000000F80000-0x0000000000F81000-memory.dmp

            memory/1068-164-0x00000000059D0000-0x00000000059D1000-memory.dmp

            memory/1068-159-0x0000000002700000-0x0000000002701000-memory.dmp

            memory/1068-160-0x0000000002440000-0x000000000308A000-memory.dmp

            memory/1068-161-0x0000000005420000-0x0000000005421000-memory.dmp

            memory/1068-158-0x0000000002440000-0x000000000308A000-memory.dmp

            memory/1068-167-0x0000000005A00000-0x0000000005A01000-memory.dmp

            memory/1068-179-0x00000000064E0000-0x00000000064E1000-memory.dmp

            memory/1068-180-0x00000000064F0000-0x00000000064F1000-memory.dmp

            memory/1136-107-0x0000000000400000-0x000000000044D000-memory.dmp

            memory/1144-77-0x0000000000400000-0x0000000000537000-memory.dmp

            memory/1376-134-0x0000000004952000-0x0000000004953000-memory.dmp

            memory/1376-147-0x0000000005930000-0x0000000005931000-memory.dmp

            memory/1376-129-0x00000000025B0000-0x00000000025B1000-memory.dmp

            memory/1376-133-0x0000000004950000-0x0000000004951000-memory.dmp

            memory/1376-130-0x0000000004990000-0x0000000004991000-memory.dmp

            memory/1376-132-0x0000000005420000-0x0000000005421000-memory.dmp

            memory/1376-131-0x00000000027A0000-0x00000000027A1000-memory.dmp

            memory/1500-99-0x0000000000400000-0x000000000044D000-memory.dmp

            memory/1556-59-0x0000000000400000-0x0000000000537000-memory.dmp

            memory/1556-63-0x0000000000400000-0x0000000000537000-memory.dmp

            memory/1556-61-0x0000000075631000-0x0000000075633000-memory.dmp

            memory/1640-62-0x0000000001D40000-0x0000000001E5B000-memory.dmp

            memory/1680-124-0x00000000063A0000-0x00000000063A1000-memory.dmp

            memory/1680-98-0x0000000004A10000-0x0000000004A11000-memory.dmp

            memory/1680-111-0x00000000057B0000-0x00000000057B1000-memory.dmp

            memory/1680-100-0x00000000049D0000-0x00000000049D1000-memory.dmp

            memory/1680-116-0x00000000061A0000-0x00000000061A1000-memory.dmp

            memory/1680-97-0x0000000000870000-0x0000000000871000-memory.dmp

            memory/1680-117-0x0000000006300000-0x0000000006301000-memory.dmp

            memory/1680-108-0x0000000004970000-0x0000000004971000-memory.dmp

            memory/1680-126-0x000000007EF30000-0x000000007EF31000-memory.dmp

            memory/1680-106-0x0000000002630000-0x0000000002631000-memory.dmp

            memory/1680-101-0x00000000049D2000-0x00000000049D3000-memory.dmp

            memory/1840-94-0x0000000000400000-0x000000000044D000-memory.dmp