Analysis
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max time kernel
146s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20230220-en -
resource tags
arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system -
submitted
28-02-2023 23:56
Static task
static1
Behavioral task
behavioral1
Sample
insurance.es.js
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
insurance.es.js
Resource
win10v2004-20230220-en
General
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Target
insurance.es.js
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Size
97KB
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MD5
42d23b699c6dfbca209876a0f9a92bf9
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SHA1
df5f64e32bdc861bf3799dd679356e167fec48fb
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SHA256
d844fae5cdc61338bf5ec8f08804c844b50446dbaebf996643227e2c2967283f
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SHA512
8734b15942ffc5981d1b7da0d83560f51292cddab496cd62963dc70bdafeccb9a3e3008e452e12872ef443d0711451c22db5ab75390c915febc351b1067b5c53
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SSDEEP
192:nluzi75WbAZvu1hdh12cB5kw94tMa3dZYkVdPrv1kHWuuIVLk5/lWWWnazp6Lzj7:cz5KIy24jHuHWZqWWdLHKSq5dWBV
Malware Config
Extracted
vjw0rm
http://198.12.123.17:6040
Signatures
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Blocklisted process makes network request 1 IoCs
Processes:
wscript.exeflow pid process 5 972 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-1-5-21-1529757233-3489015626-3409890339-1000\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\insurance.es.js wscript.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\insurance.es.js wscript.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
wscript.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Windows\CurrentVersion\Run wscript.exe Set value (str) \REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XGV00ZIC2Q = "'C:\\Users\\Admin\\AppData\\Local\\Temp\\insurance.es.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 972 wrote to memory of 2636 972 wscript.exe schtasks.exe PID 972 wrote to memory of 2636 972 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\insurance.es.js1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:972 -
C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr 'C:\Users\Admin\AppData\Local\Temp\insurance.es.js2⤵
- Creates scheduled task(s)
PID:2636
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