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
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-05-2023 15:30

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General

  • Target

    Tax Returns of R58,765.js

  • Size

    990KB

  • MD5

    9f0fc6d60f36df9301170a6ec0d3f408

  • SHA1

    88ce1c32a1f7c18f34acf969e839ec4882e1428f

  • SHA256

    d295442674b1989fd65dea6a56081467424365f1c43ef9b74bff7fdb0f0c77ec

  • SHA512

    ddcd02d4b33bc0af4c5f4112ea7d00cef17dc56f0dd90ed8fb5ae0355ff7fb9c7a627f7f4f522954302abe27dee83dcb166f98735b5b49275810d017f2521293

  • SSDEEP

    3072:QQIC0ry/lGgq1YRZILn3cl3hkdMnmxfHtnPr:QQIC0ry/lGgq1YR7y

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:4848
    • 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:4508

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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

    256KB

    MD5

    91a9141005198e332df70163ca18d68f

    SHA1

    28623a0bb08a95b854e304dab7dca9118d965da6

    SHA256

    1a6269fa48b65e91ca9b2134c57fd0fe796770fe4a1e821a27d3b01236835727

    SHA512

    f3ee9d146449c6db9ecd1c8643cfceca0c6a96c5c778a70eee0d6a7859ed2eb8c530f596bfeaedc880f700c79172eac6ce44a45caa494b1d105f3d3b2a895262

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

    990KB

    MD5

    9f0fc6d60f36df9301170a6ec0d3f408

    SHA1

    88ce1c32a1f7c18f34acf969e839ec4882e1428f

    SHA256

    d295442674b1989fd65dea6a56081467424365f1c43ef9b74bff7fdb0f0c77ec

    SHA512

    ddcd02d4b33bc0af4c5f4112ea7d00cef17dc56f0dd90ed8fb5ae0355ff7fb9c7a627f7f4f522954302abe27dee83dcb166f98735b5b49275810d017f2521293

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

    990KB

    MD5

    9f0fc6d60f36df9301170a6ec0d3f408

    SHA1

    88ce1c32a1f7c18f34acf969e839ec4882e1428f

    SHA256

    d295442674b1989fd65dea6a56081467424365f1c43ef9b74bff7fdb0f0c77ec

    SHA512

    ddcd02d4b33bc0af4c5f4112ea7d00cef17dc56f0dd90ed8fb5ae0355ff7fb9c7a627f7f4f522954302abe27dee83dcb166f98735b5b49275810d017f2521293

    Download Submit