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Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
13/03/2024, 11:00
Static task
static1
Behavioral task
behavioral1
Sample
c5b4646d7fd71be69ee219baf37ebeec.dll
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
c5b4646d7fd71be69ee219baf37ebeec.dll
Resource
win10v2004-20240226-en
General
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Target
c5b4646d7fd71be69ee219baf37ebeec.dll
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Size
64KB
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MD5
c5b4646d7fd71be69ee219baf37ebeec
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SHA1
bfb7620e677917173fabcfd6030d4cf9a2a7814f
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SHA256
a27835ad71833743504aca52292758115a07e2eb66e196a77760be81a624c2b2
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SHA512
7fe26d57c47bb7957c62360cae03ac1d7a8afc987836c15e1b42309ea6f95269e30a7c73b26e7e46d864fbacb1bcb1fb397f7e9034eb4aad504c17701f84f742
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SSDEEP
768:rafQmHy4c93vGSxt7j7g1E9wWEWJJd3G5U3s4xQMm37L3EVgfRO+ozTly:zmS9T5ftwWTGm3O33/IJ1
Malware Config
Signatures
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Modifies AppInit DLL entries 2 TTPs
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-275798769-4264537674-1142822080-1000\Control Panel\International\Geo\Nation cmd.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Modifies registry class 2 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\regfile\shell\open\command\ = "regedit.exe /s \"%1\"" rundll32.exe Key created \REGISTRY\USER\S-1-5-21-275798769-4264537674-1142822080-1000_Classes\Local Settings cmd.exe -
Runs .reg file with regedit 1 IoCs
pid Process 3192 regedit.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 4140 rundll32.exe 4140 rundll32.exe 4140 rundll32.exe 4140 rundll32.exe -
Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 2396 wrote to memory of 4140 2396 rundll32.exe 89 PID 2396 wrote to memory of 4140 2396 rundll32.exe 89 PID 2396 wrote to memory of 4140 2396 rundll32.exe 89 PID 4140 wrote to memory of 2128 4140 rundll32.exe 90 PID 4140 wrote to memory of 2128 4140 rundll32.exe 90 PID 4140 wrote to memory of 2128 4140 rundll32.exe 90 PID 2128 wrote to memory of 3192 2128 cmd.exe 92 PID 2128 wrote to memory of 3192 2128 cmd.exe 92 PID 2128 wrote to memory of 3192 2128 cmd.exe 92
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\c5b4646d7fd71be69ee219baf37ebeec.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:2396 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\c5b4646d7fd71be69ee219baf37ebeec.dll,#12⤵
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4140 -
C:\Windows\SysWOW64\cmd.execmd /c C:\Users\Admin\AppData\Local\Temp\a.reg3⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2128 -
C:\Windows\SysWOW64\regedit.exe"regedit.exe" /s "C:\Users\Admin\AppData\Local\Temp\a.reg"4⤵
- Runs .reg file with regedit
PID:3192
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
152B
MD5b100f5324ef74ded0b998e64d07a2e19
SHA140b0d7f51bf2dd8451f1b723d21355c471a5fa46
SHA2563db613d24a75ae220891698c055e1c580a42e58564f568a0510db87581cc2042
SHA512c12391bb37c334074f7d7e1257b6364fd5cbce848e0a8fe15b8326f54fd9568fe3baec58618c4334027a774a06a08ec249cb71db925c1f85feee6a3d3a816c04