Analysis
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max time kernel
142s -
max time network
146s -
platform
windows10-2004_x64 -
resource
win10v2004-20230220-en -
resource tags
arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system -
submitted
21-02-2023 20:38
Static task
static1
Behavioral task
behavioral1
Sample
malware.js
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
malware.js
Resource
win10v2004-20230220-en
General
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Target
malware.js
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Size
8KB
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MD5
6133488aa55c35b2b8f8f5e987f2ce27
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SHA1
a288f7774abdd0c1f337fe25259d6432b08e8a57
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SHA256
b3c5a0a3ac206fafac0c872021eb6b540942f301c72b2e09ad48d2e1c6ee679e
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SHA512
cb299228537ab9e51dd1eb6ac2f488f9b659dd421337d9033486efe7acbc62918e4765abe20e6d5ea8f9c6453cf3d9a2f934d45755db84aea47a9bf2acd3e1ea
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SSDEEP
192:MA7/AIwPI9xHUn0zRblHk33+/VGzZC3BUOhOOZKdR:b/vmaxNRblHOqmOpW
Malware Config
Extracted
vjw0rm
http://jamnnd.duckdns.org:8024
Signatures
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Blocklisted process makes network request 1 IoCs
Processes:
wscript.exeflow pid process 4 4320 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-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation wscript.exe -
Drops startup file 2 IoCs
Processes:
wscript.exedescription ioc process File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\malware.js wscript.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\malware.js wscript.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
wscript.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Windows\CurrentVersion\Run wscript.exe Set value (str) \REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\W56OZZRQKW = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\malware.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 4320 wrote to memory of 4384 4320 wscript.exe schtasks.exe PID 4320 wrote to memory of 4384 4320 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\malware.js1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4320 -
C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\malware.js2⤵
- Creates scheduled task(s)
PID:4384