Analysis

  • max time kernel
    134s
  • max time network
    151s
  • platform
    windows10_x64
  • resource
    win10-en-20211014
  • submitted
    22/11/2021, 18:47

General

  • Target
    445fa165957d7e773453c4b83fe703f3.exe
  • Size 296KB
  • Sample211122-xe7snsgfdj
  • SHA256 fadb8eb7a7e20388dd3f9cf66171ae8d1c1e0845aed740ea58fa432c69bbaa7e
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 6 IoCs
  • Process spawned unexpected child process 6 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

    suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

  • Downloads MZ/PE file
  • Executes dropped EXE 6 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 12 IoCs
  • Drops file in System32 directory 4 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Windows directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 7 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 37 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\445fa165957d7e773453c4b83fe703f3.exe
    "C:\Users\Admin\AppData\Local\Temp\445fa165957d7e773453c4b83fe703f3.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2772
    • C:\Users\Admin\AppData\Local\Temp\445fa165957d7e773453c4b83fe703f3.exe
      "C:\Users\Admin\AppData\Local\Temp\445fa165957d7e773453c4b83fe703f3.exe"
      2⤵
      • Modifies WinLogon for persistence
      • Adds Run key to start application
      • Drops file in System32 directory
      • Drops file in Windows directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:900
      • C:\Windows\Logs\NetSetup\System.exe
        "C:\Windows\Logs\NetSetup\System.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3544
        • C:\Windows\Logs\NetSetup\System.exe
          "C:\Windows\Logs\NetSetup\System.exe"
          4⤵
          • Executes dropped EXE
          PID:1268
        • C:\Windows\Logs\NetSetup\System.exe
          "C:\Windows\Logs\NetSetup\System.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:3396
          • C:\Users\Admin\AppData\Local\Temp\svigs.exe
            "C:\Users\Admin\AppData\Local\Temp\svigs.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:3420
            • C:\Windows\SYSTEM32\cmd.exe
              "cmd" /c schtasks /create /f /sc onlogon /rl highest /tn "msing" /tr "C:\Users\Admin\Microsoft\msing.exe"
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:3568
              • C:\Windows\system32\schtasks.exe
                schtasks /create /f /sc onlogon /rl highest /tn "msing" /tr "C:\Users\Admin\Microsoft\msing.exe"
                7⤵
                • Creates scheduled task(s)
                PID:2432
            • C:\Windows\SYSTEM32\cmd.exe
              "cmd" cmd /c "C:\Users\Admin\Microsoft\msing.exe"
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:2168
              • C:\Users\Admin\Microsoft\msing.exe
                C:\Users\Admin\Microsoft\msing.exe
                7⤵
                • Executes dropped EXE
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                • Suspicious use of WriteProcessMemory
                PID:3792
                • C:\Users\Admin\AppData\Roaming\Microsoft\Telemetry\sihost64.exe
                  "C:\Users\Admin\AppData\Roaming\Microsoft\Telemetry\sihost64.exe"
                  8⤵
                  • Executes dropped EXE
                  • Suspicious use of WriteProcessMemory
                  PID:2208
                  • C:\Windows\System32\conhost.exe
                    "C:\Windows\System32\conhost.exe" "stppnxkfjpovjwf"
                    9⤵
                      PID:2304
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Boot\uk-UA\sihost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1432
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Windows\Logs\NetSetup\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1436
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\explorer.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1392
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\DeviceCenter\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2652
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Windows\WindowsUpdate\explorer.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1208
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Windows\System32\credprovhost\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:660

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          memory/900-133-0x0000000005140000-0x0000000005141000-memory.dmp

          memory/900-124-0x0000000000400000-0x000000000047E000-memory.dmp

          memory/900-132-0x0000000004FC0000-0x0000000004FC5000-memory.dmp

          memory/900-130-0x0000000005280000-0x0000000005281000-memory.dmp

          memory/900-129-0x0000000004FD0000-0x0000000004FD1000-memory.dmp

          memory/900-131-0x0000000004F60000-0x0000000004F67000-memory.dmp

          memory/2304-186-0x00000265CF000000-0x00000265CF002000-memory.dmp

          memory/2304-188-0x00000265CF000000-0x00000265CF002000-memory.dmp

          memory/2304-193-0x00000265CED80000-0x00000265CED86000-memory.dmp

          memory/2304-195-0x00000265D0AA3000-0x00000265D0AA5000-memory.dmp

          memory/2304-194-0x00000265D0AA0000-0x00000265D0AA2000-memory.dmp

          memory/2304-185-0x00000265CF000000-0x00000265CF002000-memory.dmp

          memory/2304-196-0x00000265D0AA6000-0x00000265D0AA7000-memory.dmp

          memory/2304-187-0x00000265CF000000-0x00000265CF002000-memory.dmp

          memory/2304-192-0x00000265CF000000-0x00000265CF002000-memory.dmp

          memory/2304-191-0x00000265CF000000-0x00000265CF002000-memory.dmp

          memory/2304-189-0x00000265CF030000-0x00000265CF033000-memory.dmp

          memory/2772-121-0x0000000004B60000-0x0000000004B61000-memory.dmp

          memory/2772-117-0x0000000004EF0000-0x0000000004EF1000-memory.dmp

          memory/2772-122-0x00000000049F0000-0x0000000004EEE000-memory.dmp

          memory/2772-123-0x0000000008D50000-0x0000000008DB9000-memory.dmp

          memory/2772-115-0x0000000000040000-0x0000000000041000-memory.dmp

          memory/2772-120-0x00000000049F0000-0x0000000004EEE000-memory.dmp

          memory/2772-119-0x00000000053F0000-0x00000000053F1000-memory.dmp

          memory/2772-118-0x00000000048D0000-0x00000000048D1000-memory.dmp

          memory/3396-158-0x0000000005430000-0x0000000005431000-memory.dmp

          memory/3420-169-0x0000000002C30000-0x0000000002C31000-memory.dmp

          memory/3420-163-0x000000001B9D0000-0x000000001BBC1000-memory.dmp

          memory/3420-165-0x0000000000B70000-0x0000000000D64000-memory.dmp

          memory/3420-166-0x000000001B7C0000-0x000000001B7C2000-memory.dmp

          memory/3420-167-0x000000001B7C3000-0x000000001B7C5000-memory.dmp

          memory/3420-168-0x000000001B7C6000-0x000000001B7C7000-memory.dmp

          memory/3544-144-0x0000000004E00000-0x00000000052FE000-memory.dmp

          memory/3544-145-0x0000000004E00000-0x00000000052FE000-memory.dmp

          memory/3544-142-0x0000000004F40000-0x0000000004F41000-memory.dmp

          memory/3792-184-0x0000000002DD6000-0x0000000002DD7000-memory.dmp

          memory/3792-182-0x0000000002DD0000-0x0000000002DD2000-memory.dmp

          memory/3792-183-0x0000000002DD3000-0x0000000002DD5000-memory.dmp