Overview

overview

10

Static

static

1

Tax Return...765.js

windows7-x64

10

Tax Return...765.js

windows10-2004-x64

10

Analysis

  • max time kernel
    144s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11-04-2023 18:53

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General

  • Target

    Tax Returns of R48,765.js

  • Size

    1.0MB

  • MD5

    511ba3ec38b7b845f1b7406686a30d0e

  • SHA1

    e9a6d7f6dba313a8cf19809d78bb2a4a3ae14056

  • SHA256

    348ad8d4b2ad2379dafa00853c8c9069b438f7121f31475ec6b0ecdca8636353

  • SHA512

    fc40bc304cbd47de0c792bf0d57f9769da09eea7df8c3ebe67582a403715e67e70d59e77c8dc3a1e29429a136297af619d7ba9fb5b1c348f76f138e89057f788

  • SSDEEP

    3072:MQOYUQuE6HMWYiKuVVDGnCpsFpx0iu0cKUQbStdj7:MQOwuE6FYinVVDGnCpKpx0XeStdn

Score
10/10
wshrattrojan

Malware Config

Extracted

Family

wshrat

C2

http://harold.2waky.com:3609

Signatures

  • WSHRAT

    WSHRAT is a variant of Houdini worm and has vbs and js variants.

    trojanwshrat
  • Blocklisted process makes network request 17 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 2 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.

  • Enumerates physical storage devices 1 TTPs

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

  • Script User-Agent 16 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe "C:\Users\Admin\AppData\Local\Temp\Tax Returns of R48,765.js"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Suspicious use of WriteProcessMemory
    PID:2372
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\Tax Returns of R48,765.js"
      2⤵
      • Blocklisted process makes network request
      • Drops startup file
      PID:3752

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Tax Returns of R48,765.js
    Filesize

    1.0MB

    MD5

    511ba3ec38b7b845f1b7406686a30d0e

    SHA1

    e9a6d7f6dba313a8cf19809d78bb2a4a3ae14056

    SHA256

    348ad8d4b2ad2379dafa00853c8c9069b438f7121f31475ec6b0ecdca8636353

    SHA512

    fc40bc304cbd47de0c792bf0d57f9769da09eea7df8c3ebe67582a403715e67e70d59e77c8dc3a1e29429a136297af619d7ba9fb5b1c348f76f138e89057f788

    Download Submit

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Tax Returns of R48,765.js
    Filesize

    1.0MB

    MD5

    511ba3ec38b7b845f1b7406686a30d0e

    SHA1

    e9a6d7f6dba313a8cf19809d78bb2a4a3ae14056

    SHA256

    348ad8d4b2ad2379dafa00853c8c9069b438f7121f31475ec6b0ecdca8636353

    SHA512

    fc40bc304cbd47de0c792bf0d57f9769da09eea7df8c3ebe67582a403715e67e70d59e77c8dc3a1e29429a136297af619d7ba9fb5b1c348f76f138e89057f788

    Download Submit

  • C:\Users\Admin\AppData\Roaming\Tax Returns of R48,765.js
    Filesize

    1.0MB

    MD5

    511ba3ec38b7b845f1b7406686a30d0e

    SHA1

    e9a6d7f6dba313a8cf19809d78bb2a4a3ae14056

    SHA256

    348ad8d4b2ad2379dafa00853c8c9069b438f7121f31475ec6b0ecdca8636353

    SHA512

    fc40bc304cbd47de0c792bf0d57f9769da09eea7df8c3ebe67582a403715e67e70d59e77c8dc3a1e29429a136297af619d7ba9fb5b1c348f76f138e89057f788

    Download Submit