Resubmissions

10/04/2024, 02:55

240410-dektcsff5x10

10/04/2024, 02:54

240410-dd6z7scc8910

10/04/2024, 02:54

240410-dd6pfacc8810

10/04/2024, 02:54

240410-dd53xacc8710

09/09/2023, 16:01

230909-tgqqdscd3z7

Analysis

  • max time kernel
    297s
  • max time network
    295s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240221-en
  • resource tags

    arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    10/04/2024, 02:54

General

  • Target
    dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe
  • Size 203KB
  • Sample240410-dd53xacc87
  • SHA256 dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236a
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Detect Gurcu Stealer V3 payload 2 IoCs
  • Detect ZGRat V1 2 IoCs
  • Gurcu, WhiteSnake

    Gurcu is a malware stealer written in C#.

  • ZGRat

    ZGRat is remote access trojan written in C#.

  • Executes dropped EXE 12 IoCs
  • Reads WinSCP keys stored on the system 2 TTPs

    Tries to access WinSCP stored sessions.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 3 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 1 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 24 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:\Users\Admin\AppData\Local\Temp\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3624
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe" &&START "" "C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1188
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:1308
        • C:\Windows\system32\PING.EXE
          ping 127.0.0.1
          3⤵
          • Runs ping.exe
          PID:4264
        • C:\Windows\system32\schtasks.exe
          schtasks /create /tn "dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe" /rl HIGHEST /f
          3⤵
          • Creates scheduled task(s)
          PID:2300
        • C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe
          "C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe"
          3⤵
          • Executes dropped EXE
          • Accesses Microsoft Outlook profiles
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          • outlook_office_path
          • outlook_win_path
          PID:4484
          • C:\Windows\System32\tar.exe
            "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp4A96.tmp" -C "C:\Users\Admin\AppData\Local\9krryil1hy"
            4⤵
              PID:3000
            • C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe
              "C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\9krryil1hy\torrc.txt"
              4⤵
              • Executes dropped EXE
              PID:3656
      • C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe
        C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe
        1⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3476
        • C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe
          "C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\9krryil1hy\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:3100
      • C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe
        C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe
        1⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2712
        • C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe
          "C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\9krryil1hy\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:924
      • C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe
        C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe
        1⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4032
        • C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe
          "C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\9krryil1hy\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:1908
      • C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe
        C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe
        1⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3956
        • C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe
          "C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\9krryil1hy\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:1668
      • C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe
        C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe
        1⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2692
        • C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe
          "C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\9krryil1hy\torrc.txt"
          2⤵
          • Executes dropped EXE
          PID:3280

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            cached-microdesc-consensus

            • Path C:\Users\Admin\AppData\Local\9krryil1hy\data\cached-microdesc-consensus
            • Size 2.7MB
            • SHA256 60b43cdce0f807f7891521f396f53def34a7d98986dbde0faa2a197189c587f3
            • MD5 SHA1 SHA512 SSDEEP

            cached-microdescs.new

            • Path C:\Users\Admin\AppData\Local\9krryil1hy\data\cached-microdescs.new
            • Size 8.7MB
            • SHA256 a8181fe7a79c763bc9e58b20ef4367e4e80a6287086eaaace0fffd618901c240
            • MD5 SHA1 SHA512 SSDEEP

            hostname

            • Path C:\Users\Admin\AppData\Local\9krryil1hy\host\hostname
            • Size 64B
            • SHA256 ff3fc68b0797d8213393c2eec4fe3893d8c5ccd0dc88e7f022ebf5ce4ac3b7a0
            • MD5 SHA1 SHA512

            port.dat

            • Path C:\Users\Admin\AppData\Local\9krryil1hy\port.dat
            • Size 4B
            • SHA256 d95936051b112558c270fd675137155155c74b8f0721fde9007b53d40cedba2b
            • MD5 SHA1 SHA512

            tor.exe

            • Path C:\Users\Admin\AppData\Local\9krryil1hy\tor\tor.exe
            • Size 7.4MB
            • SHA256 46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82
            • MD5 SHA1 SHA512 SSDEEP

            torrc.txt

            • Path C:\Users\Admin\AppData\Local\9krryil1hy\torrc.txt
            • Size 218B
            • SHA256 96cc3c3752189d06b9c2a3564b34a0712091baa79b1c95dd97c7136dd431558d
            • MD5 SHA1 SHA512

            dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe

            • Path C:\Users\Admin\AppData\Local\EsetSecurity\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe
            • Size 203KB
            • SHA256 dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236a
            • MD5 SHA1 SHA512 SSDEEP

            dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe.log

            • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\dba803bf0917907fad2aa9163b78a20ba8ba2b9a79cf105dede3a5acd821236aexe_JC.exe.log
            • Size 847B
            • SHA256 50a57273ecb794e53b0622eb841341e2643c11f53fa47356e6e754ab2268171d
            • MD5 SHA1 SHA512

            installUtilLog.txt

            • Path C:\Users\Admin\AppData\Local\Temp\installUtilLog.txt
            • Size 206B
            • SHA256 6a5e461b40714ccc0e89556f2c960a1162cf20f55ca3c8adbaa9b67915a7c411
            • MD5 SHA1 SHA512

            installUtilLog.txt

            • Path C:\Users\Admin\AppData\Local\Temp\installUtilLog.txt
            • Size 259B
            • SHA256 4ac5138d453a94fdc871aa9480ccbf6e31a29e97c2334e5b24c4a30a7ffa09c4
            • MD5 SHA1 SHA512

            installUtilLog.txt

            • Path C:\Users\Admin\AppData\Local\Temp\installUtilLog.txt
            • Size 100B
            • SHA256 7989804617981ee290a2597eed83bfa5dc56a61331b16f48b5a5add63a82cfee
            • MD5 SHA1 SHA512

            installUtilLog.txt

            • Path C:\Users\Admin\AppData\Local\Temp\installUtilLog.txt
            • Size 153B
            • SHA256 6ba5b29af417dad0a918da02afb0c56265222f452b5537e9ec64d9b22b96cbb7
            • MD5 SHA1 SHA512

            tmp4A96.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\tmp4A96.tmp
            • Size 13.3MB
            • SHA256 b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12
            • MD5 SHA1 SHA512 SSDEEP

            memory/2692-127-0x00007FFCCECF0000-0x00007FFCCF7B2000-memory.dmp

            memory/2692-128-0x0000027DE91E0000-0x0000027DE91F0000-memory.dmp

            memory/2692-132-0x00007FFCCECF0000-0x00007FFCCF7B2000-memory.dmp

            memory/2712-96-0x00007FFCCECF0000-0x00007FFCCF7B2000-memory.dmp

            memory/2712-92-0x000001AF70870000-0x000001AF70880000-memory.dmp

            memory/2712-91-0x00007FFCCECF0000-0x00007FFCCF7B2000-memory.dmp

            memory/3476-83-0x0000026916810000-0x0000026916820000-memory.dmp

            memory/3476-89-0x00007FFCCECF0000-0x00007FFCCF7B2000-memory.dmp

            memory/3476-82-0x00007FFCCECF0000-0x00007FFCCF7B2000-memory.dmp

            memory/3624-0-0x00000175F7740000-0x00000175F7778000-memory.dmp

            memory/3624-3-0x00007FFCCECF0000-0x00007FFCCF7B2000-memory.dmp

            memory/3624-4-0x00000175F7BA0000-0x00000175F7BB0000-memory.dmp

            memory/3624-6-0x00007FFCCECF0000-0x00007FFCCF7B2000-memory.dmp

            memory/3956-109-0x00007FFCCECF0000-0x00007FFCCF7B2000-memory.dmp

            memory/3956-113-0x00007FFCCECF0000-0x00007FFCCF7B2000-memory.dmp

            memory/4032-102-0x00007FFCCECF0000-0x00007FFCCF7B2000-memory.dmp

            memory/4032-103-0x000002349BA80000-0x000002349BA90000-memory.dmp

            memory/4032-107-0x00007FFCCECF0000-0x00007FFCCF7B2000-memory.dmp

            memory/4484-81-0x000002896A860000-0x000002896A9CA000-memory.dmp

            memory/4484-11-0x00007FFCCECF0000-0x00007FFCCF7B2000-memory.dmp

            memory/4484-12-0x000002896A230000-0x000002896A240000-memory.dmp

            memory/4484-55-0x00007FFCCECF0000-0x00007FFCCF7B2000-memory.dmp

            memory/4484-65-0x000002896A230000-0x000002896A240000-memory.dmp

            memory/4484-84-0x00007FFCCECF0000-0x00007FFCCF7B2000-memory.dmp