Analysis
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max time kernel
150s -
max time network
165s -
platform
windows10_x64 -
resource
win10-en-20210920 -
submitted
14-10-2021 15:13
Static task
static1
Behavioral task
behavioral1
Sample
G62J15CB97C53V.js
Resource
win7-en-20210920
Behavioral task
behavioral2
Sample
G62J15CB97C53V.js
Resource
win10-en-20210920
General
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Target
G62J15CB97C53V.js
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Size
81KB
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MD5
c5b048b21730de23dabcc6758914a2f7
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SHA1
e9d5f9bee531aff20d8c8f64b70e51861b9f6b81
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SHA256
6566e970bb140ac6ecdc59a11319c7a0650dbae2c182157e7f51b9bb8502c34e
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SHA512
a83d03ce24643e91f40ecaeddefbc55fa2720df6e75f7422e8470caf8e3199b8d8c7783e0665a6d176ea44e1d4f7b6d415e903d7bc25fd2cab3ae4e347005975
Malware Config
Extracted
vjw0rm
http://6800js.duckdns.org:6800
Signatures
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Blocklisted process makes network request 1 IoCs
Processes:
wscript.exeflow pid process 9 2492 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\G62J15CB97C53V.js wscript.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\G62J15CB97C53V.js wscript.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
wscript.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Windows\CurrentVersion\Run wscript.exe Set value (str) \REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Windows\CurrentVersion\Run\BYK43BSFUJ = "'C:\\Users\\Admin\\AppData\\Local\\Temp\\G62J15CB97C53V.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 2492 wrote to memory of 604 2492 wscript.exe schtasks.exe PID 2492 wrote to memory of 604 2492 wscript.exe schtasks.exe
Processes
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C:\Windows\system32\wscript.exewscript.exe C:\Users\Admin\AppData\Local\Temp\G62J15CB97C53V.js1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr 'C:\Users\Admin\AppData\Local\Temp\G62J15CB97C53V.js2⤵
- Creates scheduled task(s)
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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memory/604-115-0x0000000000000000-mapping.dmp