Analysis

  • max time kernel
    95s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    21-05-2022 01:52

General

  • Target

    SCTB38 NEW782.exe

  • Size

    1.0MB

  • MD5

    18b6f9b159d93570f9ace705a62a9fad

  • SHA1

    82f75eeef6e25500f517faf6f561057e63ea3a63

  • SHA256

    48c124e7d628adaa322470af51fdee8a965faf61bdfbc4c2b143dcf57d52be1a

  • SHA512

    d836b883425d6c8567eb0876a67525aca3ac6a33c0b7d2a72ef76bf6f0bf71594fdb2c71d6b18f5eeb607c1b3cd334876ae5d2906fa456d6b8d2c6e498696e39

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\0F48153F20\Log.txt

Family

masslogger

Ransom Note
<|| v2.4.0.0 ||> User Name: Admin IP: 154.61.71.51 Location: United States Windows OS: Microsoft Windows 10 Pro 64bit Windows Serial Key: W269N-WFGWX-YVC9B-4J6C9-T83GX CPU: Intel Core Processor (Broadwell) GPU: Microsoft Basic Display Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/21/2022 2:49:24 AM MassLogger Started: 5/21/2022 2:49:21 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\VideoLAN\vlc.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes: <|| WD Exclusion ||> Disabled <|| Binder ||> Disabled <|| Downloader ||> Disabled <|| Window Searcher ||> Disabled <|| Bot Killer ||> Disabled <|| Search And Upload ||> Disabled <|| Telegram Desktop ||> Not Installed <|| Pidgin ||> Not Installed <|| FileZilla ||> Not Installed <|| Discord Tokken ||> Not Installed <|| NordVPN ||> Not Installed <|| Outlook ||> Not Installed <|| FoxMail ||> Not Installed <|| Thunderbird ||> Not Installed <|| FireFox ||> Not Found <|| QQ Browser ||> Not Installed <|| Chromium Recovery ||> Not Installed or Not Found <|| Keylogger And Clipboard ||> NA

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.gmail.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    masslog1960

Signatures

  • MassLogger

    Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.

  • MassLogger log file 1 IoCs

    Detects a log file produced by MassLogger.

  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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 42 IoCs
  • Looks up external IP address via web service 2 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.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 35 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 31 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SCTB38 NEW782.exe
    "C:\Users\Admin\AppData\Local\Temp\SCTB38 NEW782.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2160
    • C:\Users\Admin\AppData\Local\Temp\SCTB38 NEW782.exe
      "{path}"
      2⤵
      • Checks computer location settings
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3992
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn vlc.exe /tr '"C:\Users\Admin\VideoLAN\vlc.exe"' & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1388
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /create /f /sc onlogon /rl highest /tn vlc.exe /tr '"C:\Users\Admin\VideoLAN\vlc.exe"'
          4⤵
          • Creates scheduled task(s)
          PID:4532
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8A3E.tmp.bat""
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4540
        • C:\Windows\SysWOW64\timeout.exe
          timeout 3
          4⤵
          • Delays execution with timeout.exe
          PID:1960
        • C:\Users\Admin\VideoLAN\vlc.exe
          "C:\Users\Admin\VideoLAN\vlc.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2216
          • C:\Users\Admin\VideoLAN\vlc.exe
            "{path}"
            5⤵
            • Executes dropped EXE
            • Checks computer location settings
            • Accesses Microsoft Outlook profiles
            • Suspicious behavior: AddClipboardFormatListener
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            • outlook_office_path
            • outlook_win_path
            PID:2556

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\SCTB38 NEW782.exe.log

    Filesize

    1KB

    MD5

    6dcfdb496c3cf0a736b09292618b380d

    SHA1

    59d3aecbd319c9b48d500b51a093ee48d02af334

    SHA256

    cb5dcf594045c8b7a5f87e8a12eabbd3e53e673654926027627ed79ef3e2a203

    SHA512

    9b7d22dc9e40d11693f7191f7b075a78974322af145010e66b19d989e678477dfe4741e88d02929d5b37236276f4605bc23a7adbedf43b66cd3c4e5e7b7e67ff

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\vlc.exe.log

    Filesize

    1KB

    MD5

    6dcfdb496c3cf0a736b09292618b380d

    SHA1

    59d3aecbd319c9b48d500b51a093ee48d02af334

    SHA256

    cb5dcf594045c8b7a5f87e8a12eabbd3e53e673654926027627ed79ef3e2a203

    SHA512

    9b7d22dc9e40d11693f7191f7b075a78974322af145010e66b19d989e678477dfe4741e88d02929d5b37236276f4605bc23a7adbedf43b66cd3c4e5e7b7e67ff

  • C:\Users\Admin\AppData\Local\Temp\tmp8A3E.tmp.bat

    Filesize

    140B

    MD5

    73f6a2b0972fe2524ef6a6f09b6c789c

    SHA1

    b324258e3993fbba182e0f6dbf1e895d5cd6cf4b

    SHA256

    6dd62db1905607640852050055e6b3f5210bb5434a178fbfd70f2a0bb9cd7aaa

    SHA512

    3edf4117a599b5c89a11f7075f97db57f1f72866c2a6fd81b2441c03234fffdd8cac2e5310b5b76ee9e181a45eb1416ea4aa9329ea07bc41e6cc6be6c7c8b0fe

  • C:\Users\Admin\VideoLAN\vlc.exe

    Filesize

    1.0MB

    MD5

    18b6f9b159d93570f9ace705a62a9fad

    SHA1

    82f75eeef6e25500f517faf6f561057e63ea3a63

    SHA256

    48c124e7d628adaa322470af51fdee8a965faf61bdfbc4c2b143dcf57d52be1a

    SHA512

    d836b883425d6c8567eb0876a67525aca3ac6a33c0b7d2a72ef76bf6f0bf71594fdb2c71d6b18f5eeb607c1b3cd334876ae5d2906fa456d6b8d2c6e498696e39

  • C:\Users\Admin\VideoLAN\vlc.exe

    Filesize

    1.0MB

    MD5

    18b6f9b159d93570f9ace705a62a9fad

    SHA1

    82f75eeef6e25500f517faf6f561057e63ea3a63

    SHA256

    48c124e7d628adaa322470af51fdee8a965faf61bdfbc4c2b143dcf57d52be1a

    SHA512

    d836b883425d6c8567eb0876a67525aca3ac6a33c0b7d2a72ef76bf6f0bf71594fdb2c71d6b18f5eeb607c1b3cd334876ae5d2906fa456d6b8d2c6e498696e39

  • C:\Users\Admin\VideoLAN\vlc.exe

    Filesize

    1.0MB

    MD5

    18b6f9b159d93570f9ace705a62a9fad

    SHA1

    82f75eeef6e25500f517faf6f561057e63ea3a63

    SHA256

    48c124e7d628adaa322470af51fdee8a965faf61bdfbc4c2b143dcf57d52be1a

    SHA512

    d836b883425d6c8567eb0876a67525aca3ac6a33c0b7d2a72ef76bf6f0bf71594fdb2c71d6b18f5eeb607c1b3cd334876ae5d2906fa456d6b8d2c6e498696e39

  • memory/1388-138-0x0000000000000000-mapping.dmp

  • memory/1960-143-0x0000000000000000-mapping.dmp

  • memory/2160-133-0x0000000005A30000-0x0000000005A3A000-memory.dmp

    Filesize

    40KB

  • memory/2160-130-0x0000000000DF0000-0x0000000000EFA000-memory.dmp

    Filesize

    1.0MB

  • memory/2160-134-0x000000000F9C0000-0x000000000FA5C000-memory.dmp

    Filesize

    624KB

  • memory/2160-132-0x0000000005890000-0x0000000005922000-memory.dmp

    Filesize

    584KB

  • memory/2160-131-0x0000000005D90000-0x0000000006334000-memory.dmp

    Filesize

    5.6MB

  • memory/2216-144-0x0000000000000000-mapping.dmp

  • memory/2556-147-0x0000000000000000-mapping.dmp

  • memory/2556-151-0x0000000007CC0000-0x0000000007D10000-memory.dmp

    Filesize

    320KB

  • memory/3992-137-0x0000000005850000-0x00000000058B6000-memory.dmp

    Filesize

    408KB

  • memory/3992-136-0x0000000000400000-0x00000000004B8000-memory.dmp

    Filesize

    736KB

  • memory/3992-135-0x0000000000000000-mapping.dmp

  • memory/4532-141-0x0000000000000000-mapping.dmp

  • memory/4540-139-0x0000000000000000-mapping.dmp