Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    25-01-2023 14:57

General

  • Target

    8b786459da668bf229d67be2f0723d3e.js

  • Size

    1.3MB

  • MD5

    8b786459da668bf229d67be2f0723d3e

  • SHA1

    a049cdb8ababa353f6680203104d94df4fd8bebb

  • SHA256

    e5949068ab9d6e134134a471fda48012a5052bf8e4fcbd5801e0df0d617f2336

  • SHA512

    47a6611f7071093df66a214753c8b5b43428bd22dade994b1e28d6c1f90d59e9b226b95ca8c5879fbd5cc1ab3145b9633df4aea12312b3a4e915b737d976fcb2

  • SSDEEP

    24576:n+qRVuZ86lSFd1dLImyZDe83TrXYpPJK/msejpyqI8bFt3:n+qRVk8eo1LImytlYLKc+8P

Malware Config

Signatures

  • Vjw0rm

    Vjw0rm is a remote access trojan written in JavaScript.

  • Blocklisted process makes network request 15 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:840
    • 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:1616
    • 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:1824
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1824 -s 1884
        3⤵
        • Loads dropped DLL
        • Program crash
        PID:2016

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Install Root Certificate

1
T1130

Modify Registry

1
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

System Information Discovery

2
T1082

Query Registry

1
T1012

Collection

Data from Local System

1
T1005

Email Collection

1
T1114

Command and Control

Web Service

1
T1102

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\Payload (3).exe
    Filesize

    755KB

    MD5

    3e8af9fffb1b980b193508f6a8a8cdc3

    SHA1

    e91e6f525952ae5a812d3cd3a795c6aeca94e527

    SHA256

    ba055f5ffcf5c345e37307673717f11319326e5c4b621f336b76c4826b09f7cc

    SHA512

    072bac20632cc30aa99715e4d5f508eab6a5b143704a0cdbbf0f5f22f86f4c02204efb1eb4acf8eeca97622c074bed2aa333119e842040e34ab55bff219a1f11

  • C:\Users\Admin\AppData\Local\Temp\Payload (3).exe
    Filesize

    755KB

    MD5

    3e8af9fffb1b980b193508f6a8a8cdc3

    SHA1

    e91e6f525952ae5a812d3cd3a795c6aeca94e527

    SHA256

    ba055f5ffcf5c345e37307673717f11319326e5c4b621f336b76c4826b09f7cc

    SHA512

    072bac20632cc30aa99715e4d5f508eab6a5b143704a0cdbbf0f5f22f86f4c02204efb1eb4acf8eeca97622c074bed2aa333119e842040e34ab55bff219a1f11

  • C:\Users\Admin\AppData\Roaming\UcKCgYfQCy.js
    Filesize

    5KB

    MD5

    e92476e9675eb8bd668e6e1144a07191

    SHA1

    d3b1de85dcd84a331dbdeb033e6f00b2aa46954c

    SHA256

    3840382c8527ba2e58e6ddb72f379d17a7e95ac559b2f61d8b8e0a53d4bac9b2

    SHA512

    30d3f57b150de25b30737e13a42bfc0948144e91eb9772e3b38114fe4d19ad778eeb600c8565ecfee10a86e9a6056b12119f2116c9d82fee18367ae1412b35e3

  • \Users\Admin\AppData\Local\Temp\Payload (3).exe
    Filesize

    755KB

    MD5

    3e8af9fffb1b980b193508f6a8a8cdc3

    SHA1

    e91e6f525952ae5a812d3cd3a795c6aeca94e527

    SHA256

    ba055f5ffcf5c345e37307673717f11319326e5c4b621f336b76c4826b09f7cc

    SHA512

    072bac20632cc30aa99715e4d5f508eab6a5b143704a0cdbbf0f5f22f86f4c02204efb1eb4acf8eeca97622c074bed2aa333119e842040e34ab55bff219a1f11

  • \Users\Admin\AppData\Local\Temp\Payload (3).exe
    Filesize

    755KB

    MD5

    3e8af9fffb1b980b193508f6a8a8cdc3

    SHA1

    e91e6f525952ae5a812d3cd3a795c6aeca94e527

    SHA256

    ba055f5ffcf5c345e37307673717f11319326e5c4b621f336b76c4826b09f7cc

    SHA512

    072bac20632cc30aa99715e4d5f508eab6a5b143704a0cdbbf0f5f22f86f4c02204efb1eb4acf8eeca97622c074bed2aa333119e842040e34ab55bff219a1f11

  • \Users\Admin\AppData\Local\Temp\Payload (3).exe
    Filesize

    755KB

    MD5

    3e8af9fffb1b980b193508f6a8a8cdc3

    SHA1

    e91e6f525952ae5a812d3cd3a795c6aeca94e527

    SHA256

    ba055f5ffcf5c345e37307673717f11319326e5c4b621f336b76c4826b09f7cc

    SHA512

    072bac20632cc30aa99715e4d5f508eab6a5b143704a0cdbbf0f5f22f86f4c02204efb1eb4acf8eeca97622c074bed2aa333119e842040e34ab55bff219a1f11

  • \Users\Admin\AppData\Local\Temp\Payload (3).exe
    Filesize

    755KB

    MD5

    3e8af9fffb1b980b193508f6a8a8cdc3

    SHA1

    e91e6f525952ae5a812d3cd3a795c6aeca94e527

    SHA256

    ba055f5ffcf5c345e37307673717f11319326e5c4b621f336b76c4826b09f7cc

    SHA512

    072bac20632cc30aa99715e4d5f508eab6a5b143704a0cdbbf0f5f22f86f4c02204efb1eb4acf8eeca97622c074bed2aa333119e842040e34ab55bff219a1f11

  • \Users\Admin\AppData\Local\Temp\Payload (3).exe
    Filesize

    755KB

    MD5

    3e8af9fffb1b980b193508f6a8a8cdc3

    SHA1

    e91e6f525952ae5a812d3cd3a795c6aeca94e527

    SHA256

    ba055f5ffcf5c345e37307673717f11319326e5c4b621f336b76c4826b09f7cc

    SHA512

    072bac20632cc30aa99715e4d5f508eab6a5b143704a0cdbbf0f5f22f86f4c02204efb1eb4acf8eeca97622c074bed2aa333119e842040e34ab55bff219a1f11

  • memory/840-54-0x000007FEFBF81000-0x000007FEFBF83000-memory.dmp
    Filesize

    8KB

  • memory/1616-55-0x0000000000000000-mapping.dmp
  • memory/1824-57-0x0000000000000000-mapping.dmp
  • memory/1824-61-0x0000000001120000-0x00000000011E4000-memory.dmp
    Filesize

    784KB

  • memory/1824-62-0x0000000076561000-0x0000000076563000-memory.dmp
    Filesize

    8KB

  • memory/1824-63-0x0000000000710000-0x000000000071E000-memory.dmp
    Filesize

    56KB

  • memory/1824-64-0x0000000008D10000-0x0000000008DC2000-memory.dmp
    Filesize

    712KB

  • memory/2016-65-0x0000000000000000-mapping.dmp