Analysis
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max time kernel
106s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20230221-en -
resource tags
arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system -
submitted
23-02-2023 16:06
Static task
static1
Behavioral task
behavioral1
Sample
temp.js
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
temp.js
Resource
win10-20230220-en
Behavioral task
behavioral3
Sample
temp.js
Resource
win10v2004-20230221-en
General
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Target
temp.js
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Size
6KB
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MD5
71838ec02373c35bc9217ab58cd6b6a1
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SHA1
68ed796c91ff5d04da869c6b6dd0e0bfda0a769c
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SHA256
1939367b5a1548e8af432cdbf026980006ddf37325482602303ddfaf27690b31
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SHA512
f36709240f111bf08ef43208899cd4b451fc951525543e125294ae17b77e3d15fd363669d0a2cab73f696f2a1de1e8f89ee105546ca4cbde402d445d2348ce5d
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SSDEEP
192:MZVhB3qeNJ82T2ZvfLaTRDLiUFOvewELaZL+URZn7iixK23WR8IKrzv:2VHa+JafGRDGUFOvewEyL+URl7i9TK7H
Malware Config
Extracted
vjw0rm
http://js9300.duckdns.org:9300
Signatures
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Blocklisted process makes network request 1 IoCs
Processes:
wscript.exeflow pid process 6 3100 wscript.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
wscript.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Control Panel\International\Geo\Nation wscript.exe -
Drops startup file 2 IoCs
Processes:
wscript.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\temp.js wscript.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\temp.js wscript.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
wscript.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Software\Microsoft\Windows\CurrentVersion\Run wscript.exe Set value (str) \REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\FTQMIP0ARG = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\temp.js\"" wscript.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious use of WriteProcessMemory 2 IoCs
Processes:
wscript.exedescription pid process target process PID 3100 wrote to memory of 3088 3100 wscript.exe schtasks.exe PID 3100 wrote to memory of 3088 3100 wscript.exe schtasks.exe -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Windows\system32\wscript.exewscript.exe C:\Users\Admin\AppData\Local\Temp\temp.js1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3100 -
C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\temp.js2⤵
- Creates scheduled task(s)
PID:3088
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