Overview

overview

10

Static

static

sample.js

windows7_x64

10

sample.js

windows10_x64

10

Analysis

  • max time kernel
    143s
  • max time network
    146s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    21-04-2021 04:28

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General

  • Target

    sample.js

  • Size

    910KB

  • MD5

    883fa46edf3dfc3d4160faa2704c828e

  • SHA1

    27163d08ca6d045bd9a377cf6e7908c48f986caa

  • SHA256

    fc594743679135ba55d13ef203c1a4110ec80cf207f01af9dfdf287fc83321e8

  • SHA512

    dd5627aa87a517e82c74a7a189e2f4ba00715fd4f09d2888323317d098b7b78a615936f3e236e4f4308ea2ee1d0fd245755a61bb6830e9f58ac539bff6865d09

Score
10/10
wshratpersistencetrojan

Malware Config

Signatures

  • WSHRAT

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

    trojanwshrat
  • Blocklisted process makes network request 20 IoCs
  • Drops startup file 2 IoCs
  • Adds Run key to start application 2 TTPs 8 IoCs
    persistence
  • 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 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\sample.js
    1⤵
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:3944
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\sample.js"
      2⤵
      • Blocklisted process makes network request
      • Drops startup file
      • Adds Run key to start application
      PID:416

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Defense Evasion

Modify Registry

1
T1112

Credential Access

Discovery

System Information Discovery

1
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\sample.js
    MD5

    50b161e153799ebfcd888603b54506be

    SHA1

    8e68d6610af48ef5254bd2bc5f86e090438a6c57

    SHA256

    e6ebda58c277bdad5a4bb46104a3d23c91f8e7b056a79163f573a22388446d75

    SHA512

    a4426e78af6b6a083f609b01ce7e4e8b8bd1c49dc6320cc687088ce4237207f861e26e6c3f008c362793c342b82193dd90508930df1916d8cc71676a7b5259a7

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  • C:\Users\Admin\AppData\Roaming\sample.js
    MD5

    883fa46edf3dfc3d4160faa2704c828e

    SHA1

    27163d08ca6d045bd9a377cf6e7908c48f986caa

    SHA256

    fc594743679135ba55d13ef203c1a4110ec80cf207f01af9dfdf287fc83321e8

    SHA512

    dd5627aa87a517e82c74a7a189e2f4ba00715fd4f09d2888323317d098b7b78a615936f3e236e4f4308ea2ee1d0fd245755a61bb6830e9f58ac539bff6865d09

    Download Submit
  • memory/416-114-0x0000000000000000-mapping.dmp
    Download