Analysis
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max time kernel
148s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
23-09-2024 12:11
Static task
static1
Behavioral task
behavioral1
Sample
CRYPTSP.dll
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
CRYPTSP.dll
Resource
win10v2004-20240802-en
Behavioral task
behavioral3
Sample
csc.exe
Resource
win7-20240708-en
Behavioral task
behavioral4
Sample
csc.exe
Resource
win10v2004-20240802-en
General
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Target
CRYPTSP.dll
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Size
282KB
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MD5
9969eec1d2e99a6535f5fc62b2acc78e
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SHA1
212b0d900473ff811bd6d4f1dbd2a2f732574763
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SHA256
27a1a83fc410bb51c4fa943de18fc93f1081a5703941808e01a12ef176735c4e
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SHA512
9ea50296718ebccc4a9bfcc2fce61e47b74c00febf4f50dd159c4852fbdf4a2fa06cd0fdbdfde653078c4763b8b4917b43499aa671dd2b2ca30029f8c3abeb14
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SSDEEP
6144:e5yKlTiyDU15/TKvqXNBfPmLno+bG+4ohEzP+59:e5ni7//+6feLTGroiK9
Malware Config
Extracted
cobaltstrike
http://service-61oc67uo-1327454768.gz.tencentapigw.com.cn:443/Content/js/cookie/jquery.cookie.js
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user_agent
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.0; WOW64; Trident/5.0)
Signatures
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Cobaltstrike
Detected malicious payload which is part of Cobaltstrike.
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Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000_Classes\Local Settings calc.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 4936 OpenWith.exe -
Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 3272 wrote to memory of 3140 3272 rundll32.exe 82 PID 3272 wrote to memory of 3140 3272 rundll32.exe 82 PID 3140 wrote to memory of 4292 3140 cmd.exe 84 PID 3140 wrote to memory of 4292 3140 cmd.exe 84 PID 3272 wrote to memory of 4564 3272 rundll32.exe 86 PID 3272 wrote to memory of 4564 3272 rundll32.exe 86 PID 3272 wrote to memory of 4564 3272 rundll32.exe 86
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\CRYPTSP.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:3272 -
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c calc2⤵
- Suspicious use of WriteProcessMemory
PID:3140 -
C:\Windows\system32\calc.execalc3⤵
- Modifies registry class
PID:4292
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C:\Windows\SysTem32\notepad.exeC:\Windows\SysTem32\notepad.exe2⤵PID:4564
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C:\Windows\system32\OpenWith.exeC:\Windows\system32\OpenWith.exe -Embedding1⤵
- Suspicious use of SetWindowsHookEx
PID:4936