Analysis
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max time kernel
141s -
max time network
144s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
03-11-2022 11:36
Behavioral task
behavioral1
Sample
wynlog02.js
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
wynlog02.js
Resource
win10v2004-20220812-en
General
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Target
wynlog02.js
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Size
188KB
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MD5
159203fbff13320da03487c270bd16c9
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SHA1
a3f2d4fb77d2c0d08264d40441e5fec872b38b3c
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SHA256
d2d2d9e5730335867810ac8a3c95a75d36982ababaefd10d197ee4e79ac0fd88
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SHA512
9bdd4f0d155f0520478e7de55ce31b364882596426399cfdac971d70898528afb112dd0f1972ce58ac2467fad33898e8270f381128c3afa188681b325164a78c
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SSDEEP
3072:a8WQ0bamubIpklgVDSxGfmuZ4eGK/6Z4J5vEzjbURCU6QP9Z5:aYMqAklgF2GuuZ4eGKrlBRCU6G
Malware Config
Extracted
wshrat
http://45.139.105.174:3670
Signatures
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Blocklisted process makes network request 6 IoCs
flow pid Process 6 4984 wscript.exe 7 4984 wscript.exe 28 4984 wscript.exe 39 4984 wscript.exe 42 4984 wscript.exe 45 4984 wscript.exe -
Drops startup file 2 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\wynlog02.js wscript.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\wynlog02.js wscript.exe -
Adds Run key to start application 2 TTPs 4 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\software\microsoft\windows\currentversion\run wscript.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\wynlog02 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\wynlog02.js\"" wscript.exe Key created \REGISTRY\MACHINE\software\microsoft\windows\currentversion\run wscript.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\wynlog02 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\wynlog02.js\"" wscript.exe -
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 4 ip-api.com -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Script User-Agent 5 IoCs
Uses user-agent string associated with script host/environment.
description flow ioc HTTP User-Agent header 39 WSHRAT|18024990|TMKNGOMU|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 3/11/2022|JavaScript-v3.4|NL:Netherlands HTTP User-Agent header 42 WSHRAT|18024990|TMKNGOMU|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 3/11/2022|JavaScript-v3.4|NL:Netherlands HTTP User-Agent header 45 WSHRAT|18024990|TMKNGOMU|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 3/11/2022|JavaScript-v3.4|NL:Netherlands HTTP User-Agent header 7 WSHRAT|18024990|TMKNGOMU|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 3/11/2022|JavaScript-v3.4|NL:Netherlands HTTP User-Agent header 28 WSHRAT|18024990|TMKNGOMU|Admin|Microsoft Windows 10 Pro|plus|nan-av|false - 3/11/2022|JavaScript-v3.4|NL:Netherlands