Analysis

  • max time kernel
    79s
  • max time network
    79s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 00:19

General

  • Target

    Cargo Group México - Solicitud del cliente 00235271-SKBMT-07-17-2020-115-DD3343.exe

  • Size

    1.4MB

  • MD5

    e4ebcde6c3e0f57dc68646345050c95d

  • SHA1

    a58b89b55f0dde1d1fc516f0ab33f54b4b77fe8c

  • SHA256

    ccbd3a0bf6f5ee155b8a270c65376ddf83f220dd044b44f7debebb3f76fecbca

  • SHA512

    282ea016a680d3c5228de36d6089a490d44f022567ae3bf5bafef829bcfb6481432245f499f42ae89d973b0d5d2104266d4b63aaca6d8995a839319c05c80d27

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\79FE0CC911\Log.txt

Family

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: D4F6K-QK3RD-TMVMJ-BBMRX-3MBMV CPU: Intel Core Processor (Broadwell) GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/21/2022 12:33:18 AM MassLogger Started: 5/21/2022 12:33:07 AM Interval: 96 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe MassLogger Melt: true MassLogger Exit after delivery: false As Administrator: True Processes: <|| WD Exclusion ||> Disabled <|| Binder ||> Disabled <|| USB Spread ||> Disabled <|| Downloader ||> Disabled <|| Bot Killer ||> Disabled <|| Window Searcher ||> 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 ||> Disabled

Signatures

  • MassLogger

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

  • MassLogger Main Payload 7 IoCs
  • MassLogger log file 1 IoCs

    Detects a log file produced by MassLogger.

  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Loads dropped DLL 1 IoCs
  • Obfuscated with Agile.Net obfuscator 1 IoCs

    Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

  • 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 35 IoCs
  • Looks up external IP address via web service 1 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Cargo Group México - Solicitud del cliente 00235271-SKBMT-07-17-2020-115-DD3343.exe
    "C:\Users\Admin\AppData\Local\Temp\Cargo Group México - Solicitud del cliente 00235271-SKBMT-07-17-2020-115-DD3343.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2036
    • C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
      "C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe"
      2⤵
      • Executes dropped EXE
      • Checks computer location settings
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      • outlook_office_path
      • outlook_win_path
      PID:1576
      • C:\Windows\SysWOW64\cmd.exe
        "cmd" /c start /b powershell Start-Sleep -Seconds 2; Remove-Item -path 'C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe' & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:688
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell Start-Sleep -Seconds 2; Remove-Item -path 'C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe'
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1140

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe

    Filesize

    41KB

    MD5

    6a673bfc3b67ae9782cb31af2f234c68

    SHA1

    7544e89566d91e84e3cd437b9a073e5f6b56566e

    SHA256

    978a4093058aa2ebf05dc353897d90d950324389879b57741b64160825b5ec0e

    SHA512

    72c302372ce87ceda2a3c70a6005d3f9c112f1641bc7fe6824c718971233e66c07e2996d2785fa358566c38714c25ea812c05c7cfd2f588284849d495fd24f39

  • C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe

    Filesize

    41KB

    MD5

    6a673bfc3b67ae9782cb31af2f234c68

    SHA1

    7544e89566d91e84e3cd437b9a073e5f6b56566e

    SHA256

    978a4093058aa2ebf05dc353897d90d950324389879b57741b64160825b5ec0e

    SHA512

    72c302372ce87ceda2a3c70a6005d3f9c112f1641bc7fe6824c718971233e66c07e2996d2785fa358566c38714c25ea812c05c7cfd2f588284849d495fd24f39

  • \Users\Admin\AppData\Local\Temp\AddInProcess32.exe

    Filesize

    41KB

    MD5

    6a673bfc3b67ae9782cb31af2f234c68

    SHA1

    7544e89566d91e84e3cd437b9a073e5f6b56566e

    SHA256

    978a4093058aa2ebf05dc353897d90d950324389879b57741b64160825b5ec0e

    SHA512

    72c302372ce87ceda2a3c70a6005d3f9c112f1641bc7fe6824c718971233e66c07e2996d2785fa358566c38714c25ea812c05c7cfd2f588284849d495fd24f39

  • memory/688-76-0x0000000000000000-mapping.dmp

  • memory/1140-79-0x0000000073D20000-0x00000000742CB000-memory.dmp

    Filesize

    5.7MB

  • memory/1140-77-0x0000000000000000-mapping.dmp

  • memory/1576-65-0x000000000049424E-mapping.dmp

  • memory/1576-73-0x0000000075521000-0x0000000075523000-memory.dmp

    Filesize

    8KB

  • memory/1576-63-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/1576-64-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/1576-75-0x0000000000A10000-0x0000000000A24000-memory.dmp

    Filesize

    80KB

  • memory/1576-60-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/1576-68-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/1576-70-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/1576-59-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/1576-72-0x00000000003C0000-0x0000000000404000-memory.dmp

    Filesize

    272KB

  • memory/1576-62-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/1576-74-0x0000000000B15000-0x0000000000B26000-memory.dmp

    Filesize

    68KB

  • memory/2036-54-0x0000000000D90000-0x0000000000EFA000-memory.dmp

    Filesize

    1.4MB

  • memory/2036-57-0x0000000000960000-0x000000000096A000-memory.dmp

    Filesize

    40KB

  • memory/2036-56-0x00000000003F0000-0x00000000003FA000-memory.dmp

    Filesize

    40KB

  • memory/2036-55-0x00000000003B0000-0x00000000003CE000-memory.dmp

    Filesize

    120KB