Analysis
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max time kernel
140s -
max time network
147s -
platform
windows7_x64 -
resource
win7-20230220-en -
resource tags
arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system -
submitted
21-02-2023 20:28
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
7KB
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MD5
c3b58ced711567b33db3d17ecf6a4c32
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SHA1
7dd3e64d4576bf4def0a07f3494342acf1a29624
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SHA256
a0df29850e5b36e8d787df718b9c261008e38e656de981fbb6f974dc85e6dfb4
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SHA512
fc2327bfedd54b8d43a6a79b9c1526e12c35de0bda711b89505c8b41e0fb14c1cccec6b71cb3545394897c264f8f4ba5e68074a7e7e5ef9039c3241125c1669b
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SSDEEP
192:eA7/AIwPI9xHUn0zRblHk33+/VGzZC3BUOhOOZKdz:l/vmaxNRblHOqmOpi
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 1996 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\malware.js wscript.exe File opened for modification 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-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Windows\CurrentVersion\Run wscript.exe Set value (str) \REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\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 3 IoCs
Processes:
wscript.exedescription pid process target process PID 1996 wrote to memory of 532 1996 wscript.exe schtasks.exe PID 1996 wrote to memory of 532 1996 wscript.exe schtasks.exe PID 1996 wrote to memory of 532 1996 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
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1996 -
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:532
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