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
    146s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-05-2023 06:41

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General

  • Target

    Tax Returns of R58,765.js

  • Size

    900KB

  • MD5

    caf0b9b20362d1d503ede2b73907584b

  • SHA1

    e1474ab56c34ec4e13a899aae72fe095e3f54484

  • SHA256

    c121c9e47a795e1a614708fdbc9da50031623e115e7c2f25ffbdd7534da8106a

  • SHA512

    ec71950b943494f5b329c7130261c984454089b454ec4ed311f838d1e2599795921b3773347602551bae9fbf3d0b58a79280d60c20253f227cdc0f9691fbcb02

  • SSDEEP

    6144:QQ3My8GgW0/CSQK1Ap2H5xv5vjPudGSDWs5DjS/svvT1rpoCDzY9pDxaD2zXK1X5:TH

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 20 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).

  • Script User-Agent 19 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 R58,765.js"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Suspicious use of WriteProcessMemory
    PID:4088
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\Tax Returns of R58,765.js"
      2⤵
      • Blocklisted process makes network request
      • Drops startup file
      PID:5016

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 R58,765.js
    Filesize

    900KB

    MD5

    caf0b9b20362d1d503ede2b73907584b

    SHA1

    e1474ab56c34ec4e13a899aae72fe095e3f54484

    SHA256

    c121c9e47a795e1a614708fdbc9da50031623e115e7c2f25ffbdd7534da8106a

    SHA512

    ec71950b943494f5b329c7130261c984454089b454ec4ed311f838d1e2599795921b3773347602551bae9fbf3d0b58a79280d60c20253f227cdc0f9691fbcb02

    Download Submit

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Tax Returns of R58,765.js
    Filesize

    900KB

    MD5

    caf0b9b20362d1d503ede2b73907584b

    SHA1

    e1474ab56c34ec4e13a899aae72fe095e3f54484

    SHA256

    c121c9e47a795e1a614708fdbc9da50031623e115e7c2f25ffbdd7534da8106a

    SHA512

    ec71950b943494f5b329c7130261c984454089b454ec4ed311f838d1e2599795921b3773347602551bae9fbf3d0b58a79280d60c20253f227cdc0f9691fbcb02

    Download Submit

  • C:\Users\Admin\AppData\Roaming\Tax Returns of R58,765.js
    Filesize

    900KB

    MD5

    caf0b9b20362d1d503ede2b73907584b

    SHA1

    e1474ab56c34ec4e13a899aae72fe095e3f54484

    SHA256

    c121c9e47a795e1a614708fdbc9da50031623e115e7c2f25ffbdd7534da8106a

    SHA512

    ec71950b943494f5b329c7130261c984454089b454ec4ed311f838d1e2599795921b3773347602551bae9fbf3d0b58a79280d60c20253f227cdc0f9691fbcb02

    Download Submit