Analysis
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max time kernel
142s -
max time network
154s -
platform
windows7_x64 -
resource
win7-20230220-en -
resource tags
arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system -
submitted
01-03-2023 01:48
Static task
static1
Behavioral task
behavioral1
Sample
3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.js
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.js
Resource
win10v2004-20230220-en
General
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Target
3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.js
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Size
99KB
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MD5
cf8263bd95c97a1b5e3932134a9172c5
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SHA1
a9b0e170b17e8236b7e55c9399411ef173422737
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SHA256
3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7
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SHA512
c59b797ff20cd94769db06012187d0f54ca8701c3a4bd92ed1661242311e29e6d6ea14fac65fb2607646ab577ef1d5f6351e105a0aa64d3039604d8bbef69ead
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SSDEEP
192:nluzi75WbAZvs1hdh12cB5kw94tMa3dZYkVdPrv1kc4uIVLk5/lWWWnazewBB5je:cz5Kyy24jHuMqWWyB1KSqmjm
Malware Config
Extracted
vjw0rm
http://66.154.102.135:9909
Signatures
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Blocklisted process makes network request 1 IoCs
Processes:
wscript.exeflow pid process 3 1712 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\3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.js wscript.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.js wscript.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
wscript.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000\Software\Microsoft\Windows\CurrentVersion\Run wscript.exe Set value (str) \REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000\Software\Microsoft\Windows\CurrentVersion\Run\QFBMGXAUBF = "'C:\\Users\\Admin\\AppData\\Local\\Temp\\3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.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 1712 wrote to memory of 540 1712 wscript.exe schtasks.exe PID 1712 wrote to memory of 540 1712 wscript.exe schtasks.exe PID 1712 wrote to memory of 540 1712 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\3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.js1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1712 -
C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr 'C:\Users\Admin\AppData\Local\Temp\3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.js2⤵
- Creates scheduled task(s)
PID:540
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