Analysis

  • max time kernel
    161s
  • max time network
    163s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220310-en
  • submitted
    26/03/2022, 01:30

General

  • Target
    c71f91be4c1bf1645867ed1d42d80f18ed71de9de1aab54d784af7679b4a59d2.exe
  • Size 536KB
  • Sample220326-bwt29abfcl
  • SHA256 c71f91be4c1bf1645867ed1d42d80f18ed71de9de1aab54d784af7679b4a59d2
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Drops file in System32 directory 2 IoCs
  • Drops file in Windows directory 1 IoCs
  • Checks SCSI registry key(s) 3 TTPs 64 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Modifies data under HKEY_USERS 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: LoadsDriver 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 23 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Windows\system32\winlogon.exe
    winlogon.exe
    1⤵
      PID:624
    • C:\Users\Admin\AppData\Local\Temp\c71f91be4c1bf1645867ed1d42d80f18ed71de9de1aab54d784af7679b4a59d2.exe
      "C:\Users\Admin\AppData\Local\Temp\c71f91be4c1bf1645867ed1d42d80f18ed71de9de1aab54d784af7679b4a59d2.exe"
      1⤵
      • Modifies WinLogon for persistence
      • Drops file in System32 directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4428
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k LocalService -p -s SstpSvc
      1⤵
        PID:3456
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k netsvcs -p -s DsmSvc
        1⤵
        • Checks SCSI registry key(s)
        • Modifies data under HKEY_USERS
        PID:2508
      • C:\Windows\System32\svchost.exe
        C:\Windows\System32\svchost.exe -k netsvcs -p -s NetSetupSvc
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:3976
      • C:\Windows\System32\svchost.exe
        C:\Windows\System32\svchost.exe -k netsvcs
        1⤵
          PID:4040
        • C:\Windows\System32\svchost.exe
          C:\Windows\System32\svchost.exe -k netsvcs -p -s NetSetupSvc
          1⤵
          • Drops file in Windows directory
          • Suspicious use of AdjustPrivilegeToken
          PID:4432
        • C:\Windows\System32\svchost.exe
          C:\Windows\System32\svchost.exe -k netsvcs -p -s NetSetupSvc
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2264

        Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

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              Downloads

              memory/624-145-0x0000000014E00000-0x0000000014E16000-memory.dmp

              memory/624-144-0x0000000014E00000-0x0000000014E16000-memory.dmp

              memory/624-136-0x0000000014E00000-0x0000000014E16000-memory.dmp

              memory/624-137-0x0000000014E00000-0x0000000014E16000-memory.dmp

              memory/624-138-0x0000000014E00000-0x0000000014E16000-memory.dmp

              memory/624-139-0x0000000014E00000-0x0000000014E16000-memory.dmp

              memory/624-140-0x0000000014E00000-0x0000000014E16000-memory.dmp

              memory/624-141-0x0000000014E00000-0x0000000014E16000-memory.dmp

              memory/624-142-0x0000000014E00000-0x0000000014E16000-memory.dmp

              memory/624-146-0x0000000014E00000-0x0000000014E16000-memory.dmp

              memory/624-135-0x0000000014E00000-0x0000000014E16000-memory.dmp

              memory/624-153-0x0000000014E00000-0x0000000014E16000-memory.dmp

              memory/624-143-0x0000000014E00000-0x0000000014E16000-memory.dmp

              memory/624-147-0x0000000014E00000-0x0000000014E16000-memory.dmp

              memory/624-148-0x0000000014E00000-0x0000000014E16000-memory.dmp

              memory/624-149-0x0000000014E00000-0x0000000014E16000-memory.dmp

              memory/624-150-0x0000000014E00000-0x0000000014E16000-memory.dmp

              memory/624-151-0x0000000014E00000-0x0000000014E16000-memory.dmp

              memory/624-152-0x0000000014E00000-0x0000000014E16000-memory.dmp

              memory/624-156-0x0000000014E00000-0x0000000014E16000-memory.dmp

              memory/624-155-0x0000000014E00000-0x0000000014E16000-memory.dmp

              memory/4428-134-0x0000000014E00000-0x0000000014E16000-memory.dmp