Analysis
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max time kernel
144s -
max time network
170s -
platform
windows10_x64 -
resource
win10v20210408 -
submitted
13-10-2021 18:44
Static task
static1
Behavioral task
behavioral1
Sample
H6X8V4C3C02M.PDF..js
Resource
win7v20210408
Behavioral task
behavioral2
Sample
H6X8V4C3C02M.PDF..js
Resource
win10v20210408
General
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Target
H6X8V4C3C02M.PDF..js
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Size
81KB
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MD5
0448be9d3f5813d311fcdd8bb5d190ca
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SHA1
1390e1726b9826b8c49a3f9519e7c04264f7c199
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SHA256
c560351620b68f01085c6b449e5256c617ea7eed70451f6c08900c694c08b92e
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SHA512
b6efdcb0198e3ae004516d2642acf39dd8f25ac80b8f36b14bd2b32306743ff1b9cefa7680d3b5b78f81a911be42942b27950eaddba45a3366f8bce2509769b6
Malware Config
Extracted
vjw0rm
http://7700js.duckdns.org:7700
Signatures
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Blocklisted process makes network request 1 IoCs
Processes:
wscript.exeflow pid process 9 3932 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\H6X8V4C3C02M.PDF..js wscript.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\H6X8V4C3C02M.PDF..js wscript.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
wscript.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run wscript.exe Set value (str) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\FM24ZGX1AP = "'C:\\Users\\Admin\\AppData\\Local\\Temp\\H6X8V4C3C02M.PDF..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 3932 wrote to memory of 1748 3932 wscript.exe schtasks.exe PID 3932 wrote to memory of 1748 3932 wscript.exe schtasks.exe
Processes
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C:\Windows\system32\wscript.exewscript.exe C:\Users\Admin\AppData\Local\Temp\H6X8V4C3C02M.PDF..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\H6X8V4C3C02M.PDF..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/1748-114-0x0000000000000000-mapping.dmp