Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    26/01/2023, 00:28

General

  • Target
    8b786459da668bf229d67be2f0723d3e.js
  • Size 1.3MB
  • Sample230126-asb7labd58
  • SHA256 e5949068ab9d6e134134a471fda48012a5052bf8e4fcbd5801e0df0d617f2336
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Vjw0rm

    Vjw0rm is a remote access trojan written in JavaScript.

  • Blocklisted process makes network request 16 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops startup file 2 IoCs
  • Loads dropped DLL 5 IoCs
  • 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 3 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Looks up external IP address via web service 2 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\8b786459da668bf229d67be2f0723d3e.js
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1464
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\UcKCgYfQCy.js"
      2⤵
      • Blocklisted process makes network request
      • Drops startup file
      PID:1476
    • C:\Users\Admin\AppData\Local\Temp\Payload (3).exe
      "C:\Users\Admin\AppData\Local\Temp\Payload (3).exe"
      2⤵
      • Executes dropped EXE
      • Accesses Microsoft Outlook profiles
      • Checks processor information in registry
      • Modifies system certificate store
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      • outlook_office_path
      • outlook_win_path
      PID:652
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 652 -s 1896
        3⤵
        • Loads dropped DLL
        • Program crash
        PID:1288

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        Payload (3).exe

        • Path C:\Users\Admin\AppData\Local\Temp\Payload (3).exe
        • Size 755KB
        • SHA256 ba055f5ffcf5c345e37307673717f11319326e5c4b621f336b76c4826b09f7cc
        • MD5 SHA1 SHA512 SSDEEP

        Payload (3).exe

        • Path C:\Users\Admin\AppData\Local\Temp\Payload (3).exe
        • Size 755KB
        • SHA256 ba055f5ffcf5c345e37307673717f11319326e5c4b621f336b76c4826b09f7cc
        • MD5 SHA1 SHA512 SSDEEP

        UcKCgYfQCy.js

        • Path C:\Users\Admin\AppData\Roaming\UcKCgYfQCy.js
        • Size 5KB
        • SHA256 3840382c8527ba2e58e6ddb72f379d17a7e95ac559b2f61d8b8e0a53d4bac9b2
        • MD5 SHA1 SHA512 SSDEEP

        Payload (3).exe

        • Path \Users\Admin\AppData\Local\Temp\Payload (3).exe
        • Size 755KB
        • SHA256 ba055f5ffcf5c345e37307673717f11319326e5c4b621f336b76c4826b09f7cc
        • MD5 SHA1 SHA512 SSDEEP

        Payload (3).exe

        • Path \Users\Admin\AppData\Local\Temp\Payload (3).exe
        • Size 755KB
        • SHA256 ba055f5ffcf5c345e37307673717f11319326e5c4b621f336b76c4826b09f7cc
        • MD5 SHA1 SHA512 SSDEEP

        Payload (3).exe

        • Path \Users\Admin\AppData\Local\Temp\Payload (3).exe
        • Size 755KB
        • SHA256 ba055f5ffcf5c345e37307673717f11319326e5c4b621f336b76c4826b09f7cc
        • MD5 SHA1 SHA512 SSDEEP

        Payload (3).exe

        • Path \Users\Admin\AppData\Local\Temp\Payload (3).exe
        • Size 755KB
        • SHA256 ba055f5ffcf5c345e37307673717f11319326e5c4b621f336b76c4826b09f7cc
        • MD5 SHA1 SHA512 SSDEEP

        Payload (3).exe

        • Path \Users\Admin\AppData\Local\Temp\Payload (3).exe
        • Size 755KB
        • SHA256 ba055f5ffcf5c345e37307673717f11319326e5c4b621f336b76c4826b09f7cc
        • MD5 SHA1 SHA512 SSDEEP

        memory/652-61-0x0000000000A10000-0x0000000000AD4000-memory.dmp

        memory/652-62-0x0000000076581000-0x0000000076583000-memory.dmp

        memory/652-63-0x00000000009F0000-0x00000000009FE000-memory.dmp

        memory/652-64-0x00000000089D0000-0x0000000008A82000-memory.dmp

        memory/1464-54-0x000007FEFC251000-0x000007FEFC253000-memory.dmp