Analysis

  • max time kernel
    65s
  • max time network
    160s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    19/08/2021, 09:45

General

  • Target
    Inq 81921.exe
  • Size 1.6MB
  • Sample210819-235ldvkddj
  • SHA256 c7daf67621a4eb3137b1abcb90f69833d5cf178a31fd524208c5a357e14671d8
  • MD5 SHA1 SHA512

Malware Config

Extracted

Path
  • C:\Users\Admin\AppData\Local\5089EDCC92\Log.txt

  • masslogger

Ransom Note
  • <|| v2.1.0.0 ||> User Name: Admin IP: 154.61.71.51 Location: United States Windows OS: Microsoft Windows 7 Ultimate 64bit Windows Serial Key: HYF8J-CVRMY-CM74G-RPHKF-PW487 CPU: Persocon Processor 2.5+ GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 8/19/2021 9:50:31 AM MassLogger Started: 8/19/2021 9:50:25 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\Inq 81921.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes: <|| WD Exclusion ||> Disabled <|| Binder ||> Disabled <|| USB Spread ||> 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

Signatures

  • MassLogger

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

  • MassLogger Main Payload 3 IoCs
  • MassLogger log file 1 IoCs

    Detects a log file produced by MassLogger.

  • Looks for VirtualBox Guest Additions in registry 2 TTPs
  • Looks for VMWare Tools registry key 2 TTPs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Checks computer location settings 2 TTPs 1 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.

  • Looks up external IP address via web service 1 IoCs

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

  • Maps connected drives based on registry 3 TTPs 2 IoCs

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

  • Suspicious use of SetThreadContext 1 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.

  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 25 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Inq 81921.exe
    "C:\Users\Admin\AppData\Local\Temp\Inq 81921.exe"
    1⤵
    • Checks BIOS information in registry
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1116
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\Inq 81921.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:316
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\mFdyWrlfAoDz.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1228
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\mFdyWrlfAoDz" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC6F7.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:560
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\mFdyWrlfAoDz.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1096
    • C:\Users\Admin\AppData\Local\Temp\Inq 81921.exe
      "C:\Users\Admin\AppData\Local\Temp\Inq 81921.exe"
      2⤵
      • Checks computer location settings
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:1624

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        memory/316-108-0x000000007EF30000-0x000000007EF31000-memory.dmp

        memory/316-138-0x0000000006300000-0x0000000006301000-memory.dmp

        memory/316-81-0x00000000047A2000-0x00000000047A3000-memory.dmp

        memory/316-123-0x00000000055D0000-0x00000000055D1000-memory.dmp

        memory/316-79-0x00000000047A0000-0x00000000047A1000-memory.dmp

        memory/316-67-0x00000000767B1000-0x00000000767B3000-memory.dmp

        memory/316-68-0x0000000000CE0000-0x0000000000CE1000-memory.dmp

        memory/316-69-0x00000000047E0000-0x00000000047E1000-memory.dmp

        memory/316-102-0x0000000005610000-0x0000000005611000-memory.dmp

        memory/316-107-0x0000000005670000-0x0000000005671000-memory.dmp

        memory/316-139-0x0000000006310000-0x0000000006311000-memory.dmp

        memory/316-109-0x00000000061C0000-0x00000000061C1000-memory.dmp

        memory/316-116-0x0000000006280000-0x0000000006281000-memory.dmp

        memory/1096-96-0x0000000004A12000-0x0000000004A13000-memory.dmp

        memory/1096-95-0x0000000004A10000-0x0000000004A11000-memory.dmp

        memory/1116-65-0x000000000F460000-0x000000000F501000-memory.dmp

        memory/1116-64-0x000000000C1C0000-0x000000000C2A9000-memory.dmp

        memory/1116-63-0x0000000000370000-0x0000000000381000-memory.dmp

        memory/1116-60-0x0000000000BC0000-0x0000000000BC1000-memory.dmp

        memory/1116-62-0x0000000004E10000-0x0000000004E11000-memory.dmp

        memory/1228-77-0x0000000002610000-0x0000000002611000-memory.dmp

        memory/1228-97-0x0000000005300000-0x0000000005301000-memory.dmp

        memory/1228-82-0x0000000000D10000-0x0000000000D11000-memory.dmp

        memory/1228-83-0x0000000000D12000-0x0000000000D13000-memory.dmp

        memory/1624-94-0x0000000000720000-0x0000000000721000-memory.dmp

        memory/1624-90-0x00000000005D0000-0x000000000060E000-memory.dmp

        memory/1624-86-0x0000000000400000-0x000000000049A000-memory.dmp

        memory/1624-84-0x0000000000400000-0x000000000049A000-memory.dmp

        memory/1624-149-0x0000000000725000-0x0000000000736000-memory.dmp

        memory/1624-150-0x00000000007E0000-0x00000000007EF000-memory.dmp

        memory/1624-151-0x0000000000736000-0x0000000000737000-memory.dmp