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
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-05-2024 14:45

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General

  • Target

    Tax Returns of R48_765.js

  • Size

    957KB

  • MD5

    0f597e6821a29bc87b36222f08eff311

  • SHA1

    e7f24cd04de9b92c013d71d3de526461cfb33c91

  • SHA256

    df018cc7e708b47edfe4f39769058ce0ba10a65fe653d3a32412dd504d3f2028

  • SHA512

    693ed1331f7f048789c11bc661949519149c43e3a76b3b600a1990f74763500a6b4a5efb532921bcdb58b27f3a136af9ba63e2e1dce4094fe078076d0073f1a7

  • SSDEEP

    6144:QQ5C90ha3hcY0c5OyZD5i8frkU+uKCbbBGZs3xh527wIy+6Y16vLKdYoiAL1Xl4R:TKF

Score
10/10
wshratexecutiontrojan

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 28 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.

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

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

  • Script User-Agent 27 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:1148
    • 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:4768

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\Tax Returns of R48_765.js
    Filesize

    957KB

    MD5

    0f597e6821a29bc87b36222f08eff311

    SHA1

    e7f24cd04de9b92c013d71d3de526461cfb33c91

    SHA256

    df018cc7e708b47edfe4f39769058ce0ba10a65fe653d3a32412dd504d3f2028

    SHA512

    693ed1331f7f048789c11bc661949519149c43e3a76b3b600a1990f74763500a6b4a5efb532921bcdb58b27f3a136af9ba63e2e1dce4094fe078076d0073f1a7

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