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Analysis

  • max time kernel
    118s
  • max time network
    141s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/09/2024, 12:27

General

  • Target

    rTEKL__FTALEPVEF__YATTEKL__F___xlsx.exe

  • Size

    663KB

  • MD5

    942a8123bf0cb7c594bbb09a36d0c893

  • SHA1

    b9cbb2def3503326ad2db1050944571fc73999e4

  • SHA256

    c4fcfe21455f3aa808eafdc8d0454c72019de3a104e518fc9f059335b4dc6202

  • SHA512

    363d87bd7ba37ae862948f66d07313ce6ece93d8eb2a86d91801b6caeca81cc2071904d953f6a3903df668a27b92f364d1c45f4dbcb732a8ffb3e76d8a0fb04c

  • SSDEEP

    12288:/Huj0mNmSkM+UxMRGYjCWiMhQY6Gzs6iB4ugF8tUD1N1PEDu5llnWpU:/OduMws8CWiMhQY61pB5g2tq1NBE4lnF

Malware Config

Extracted

Family

vipkeylogger

Credentials

Signatures

  • VIPKeylogger

    VIPKeylogger is a keylogger and infostealer written in C# and it resembles SnakeKeylogger that was found in 2020.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 3 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 3 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
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\rTEKL__FTALEPVEF__YATTEKL__F___xlsx.exe
    "C:\Users\Admin\AppData\Local\Temp\rTEKL__FTALEPVEF__YATTEKL__F___xlsx.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:828
    • 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\rTEKL__FTALEPVEF__YATTEKL__F___xlsx.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4988
    • C:\Users\Admin\AppData\Local\Temp\rTEKL__FTALEPVEF__YATTEKL__F___xlsx.exe
      "C:\Users\Admin\AppData\Local\Temp\rTEKL__FTALEPVEF__YATTEKL__F___xlsx.exe"
      2⤵
      • Accesses Microsoft Outlook profiles
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:5072

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_zq4kdkl2.mhu.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • memory/828-6-0x0000000004DE0000-0x0000000004DF0000-memory.dmp

    Filesize

    64KB

  • memory/828-2-0x00000000050E0000-0x0000000005684000-memory.dmp

    Filesize

    5.6MB

  • memory/828-3-0x0000000004C10000-0x0000000004CA2000-memory.dmp

    Filesize

    584KB

  • memory/828-4-0x0000000004CD0000-0x0000000004CDA000-memory.dmp

    Filesize

    40KB

  • memory/828-5-0x0000000074720000-0x0000000074ED0000-memory.dmp

    Filesize

    7.7MB

  • memory/828-15-0x0000000074720000-0x0000000074ED0000-memory.dmp

    Filesize

    7.7MB

  • memory/828-7-0x000000007472E000-0x000000007472F000-memory.dmp

    Filesize

    4KB

  • memory/828-8-0x0000000074720000-0x0000000074ED0000-memory.dmp

    Filesize

    7.7MB

  • memory/828-9-0x00000000066E0000-0x000000000676A000-memory.dmp

    Filesize

    552KB

  • memory/828-10-0x0000000008DC0000-0x0000000008E5C000-memory.dmp

    Filesize

    624KB

  • memory/828-0-0x000000007472E000-0x000000007472F000-memory.dmp

    Filesize

    4KB

  • memory/828-1-0x0000000000190000-0x000000000023C000-memory.dmp

    Filesize

    688KB

  • memory/4988-51-0x0000000007150000-0x000000000715A000-memory.dmp

    Filesize

    40KB

  • memory/4988-37-0x0000000070400000-0x000000007044C000-memory.dmp

    Filesize

    304KB

  • memory/4988-17-0x0000000074720000-0x0000000074ED0000-memory.dmp

    Filesize

    7.7MB

  • memory/4988-18-0x0000000074720000-0x0000000074ED0000-memory.dmp

    Filesize

    7.7MB

  • memory/4988-16-0x0000000004E80000-0x00000000054A8000-memory.dmp

    Filesize

    6.2MB

  • memory/4988-60-0x0000000074720000-0x0000000074ED0000-memory.dmp

    Filesize

    7.7MB

  • memory/4988-19-0x0000000004E10000-0x0000000004E32000-memory.dmp

    Filesize

    136KB

  • memory/4988-22-0x0000000005780000-0x00000000057E6000-memory.dmp

    Filesize

    408KB

  • memory/4988-21-0x0000000005620000-0x0000000005686000-memory.dmp

    Filesize

    408KB

  • memory/4988-23-0x0000000074720000-0x0000000074ED0000-memory.dmp

    Filesize

    7.7MB

  • memory/4988-57-0x0000000007400000-0x0000000007408000-memory.dmp

    Filesize

    32KB

  • memory/4988-33-0x00000000057F0000-0x0000000005B44000-memory.dmp

    Filesize

    3.3MB

  • memory/4988-34-0x0000000005DB0000-0x0000000005DCE000-memory.dmp

    Filesize

    120KB

  • memory/4988-35-0x0000000005DF0000-0x0000000005E3C000-memory.dmp

    Filesize

    304KB

  • memory/4988-36-0x0000000006D90000-0x0000000006DC2000-memory.dmp

    Filesize

    200KB

  • memory/4988-14-0x00000000047E0000-0x0000000004816000-memory.dmp

    Filesize

    216KB

  • memory/4988-47-0x0000000006380000-0x000000000639E000-memory.dmp

    Filesize

    120KB

  • memory/4988-48-0x0000000006FD0000-0x0000000007073000-memory.dmp

    Filesize

    652KB

  • memory/4988-49-0x0000000007720000-0x0000000007D9A000-memory.dmp

    Filesize

    6.5MB

  • memory/4988-50-0x00000000070E0000-0x00000000070FA000-memory.dmp

    Filesize

    104KB

  • memory/4988-56-0x0000000007420000-0x000000000743A000-memory.dmp

    Filesize

    104KB

  • memory/4988-52-0x0000000007360000-0x00000000073F6000-memory.dmp

    Filesize

    600KB

  • memory/4988-53-0x00000000072E0000-0x00000000072F1000-memory.dmp

    Filesize

    68KB

  • memory/4988-54-0x0000000007310000-0x000000000731E000-memory.dmp

    Filesize

    56KB

  • memory/4988-55-0x0000000007320000-0x0000000007334000-memory.dmp

    Filesize

    80KB

  • memory/5072-11-0x0000000000400000-0x0000000000448000-memory.dmp

    Filesize

    288KB

  • memory/5072-13-0x0000000074720000-0x0000000074ED0000-memory.dmp

    Filesize

    7.7MB

  • memory/5072-20-0x0000000074720000-0x0000000074ED0000-memory.dmp

    Filesize

    7.7MB

  • memory/5072-61-0x0000000074720000-0x0000000074ED0000-memory.dmp

    Filesize

    7.7MB

  • memory/5072-62-0x0000000006560000-0x0000000006722000-memory.dmp

    Filesize

    1.8MB

  • memory/5072-63-0x0000000006400000-0x0000000006450000-memory.dmp

    Filesize

    320KB