Analysis
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max time kernel
121s -
max time network
124s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
29-05-2024 14:08
Static task
static1
Behavioral task
behavioral1
Sample
Autoit3.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
Autoit3.exe
Resource
win10v2004-20240508-en
Behavioral task
behavioral3
Sample
script.a3x
Resource
win7-20240221-en
Behavioral task
behavioral4
Sample
script.a3x
Resource
win10v2004-20240508-en
General
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Target
script.a3x
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Size
547KB
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MD5
77fd989ebd6cfc7b75b36474503c1ad6
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SHA1
2cf50b3b481900635ffe63735bacdefacae8e85c
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SHA256
b4accf076121e1074fa593d9a3c6925c59616c3e7abcbe524a3cec6fd36b682f
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SHA512
58ef7e74c5d702177963b6d608ac0a7bcb5a661b7ca6e4925e961cfa41b1b1584155f6afffa77c576ca94d8c579336157072c296595fc1d8a92bb7a59d230f9e
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SSDEEP
6144:Ec7e/xuonLIsVBJ/U3urrvp1USrqErn3WxfZxZ7Pd47myhja86XVvwB:vS0onl2I7PrqETWxF7ymkjanvU
Malware Config
Signatures
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Modifies registry class 9 IoCs
Processes:
rundll32.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_Classes\Local Settings rundll32.exe Key created \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\a3x_auto_file rundll32.exe Set value (str) \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\a3x_auto_file\ rundll32.exe Key created \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\.a3x rundll32.exe Set value (str) \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\.a3x\ = "a3x_auto_file" rundll32.exe Key created \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\a3x_auto_file\shell\Read rundll32.exe Key created \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\a3x_auto_file\shell rundll32.exe Key created \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\a3x_auto_file\shell\Read\command rundll32.exe Set value (str) \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\a3x_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\"" rundll32.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
AcroRd32.exepid process 2768 AcroRd32.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
Processes:
AcroRd32.exepid process 2768 AcroRd32.exe 2768 AcroRd32.exe -
Suspicious use of WriteProcessMemory 7 IoCs
Processes:
cmd.exerundll32.exedescription pid process target process PID 2252 wrote to memory of 2524 2252 cmd.exe rundll32.exe PID 2252 wrote to memory of 2524 2252 cmd.exe rundll32.exe PID 2252 wrote to memory of 2524 2252 cmd.exe rundll32.exe PID 2524 wrote to memory of 2768 2524 rundll32.exe AcroRd32.exe PID 2524 wrote to memory of 2768 2524 rundll32.exe AcroRd32.exe PID 2524 wrote to memory of 2768 2524 rundll32.exe AcroRd32.exe PID 2524 wrote to memory of 2768 2524 rundll32.exe AcroRd32.exe
Processes
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C:\Windows\system32\cmd.execmd /c C:\Users\Admin\AppData\Local\Temp\script.a3x1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\script.a3x2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
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C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe"C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Local\Temp\script.a3x"3⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Roaming\Adobe\Acrobat\9.0\SharedDataEventsFilesize
3KB
MD5a510224bc9dda915227c7422916367e7
SHA1d3b30b31fd3858a53c9840af2ced9187381acb14
SHA256440621749cbb50b82536941851f7b6f883e6f7517064f0a023ca5e4a834a003b
SHA51240496793187c0c9ee6b49f036852663cba391eea408ab8f6e26fbd60b7fb5471f37b72ec691dc28bca36738ed2428f0bf0a5aba0b924ad4e1628522e875f8217