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Analysis
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max time kernel
121s -
max time network
123s -
platform
windows7_x64 -
resource
win7-20231129-en -
resource tags
arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system -
submitted
29/12/2023, 18:48
Static task
static1
Behavioral task
behavioral1
Sample
00e8d594cc7042a75f4c17574dab6ca1.dll
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
00e8d594cc7042a75f4c17574dab6ca1.dll
Resource
win10v2004-20231215-en
General
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Target
00e8d594cc7042a75f4c17574dab6ca1.dll
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Size
157KB
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MD5
00e8d594cc7042a75f4c17574dab6ca1
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SHA1
dcfe429621fef03b6baa7c9b50f11c1b4c5b1a72
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SHA256
16e46e1a85f7f4fd6cdd82e7d21c8575032ca805ddab1cbd1e37c090382d4e8e
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SHA512
40c837bf25d5cfcf936e20029c0818b84a496baf084eaa155e9a20b86ee9d495ec2237de41bdb39deed1c6b19c53d51d30f5b70a88decf67125022909eb473fa
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SSDEEP
3072:3zE763lRqqZHxSin5Utei73qy7V9gqy4v5vS93:3/pZHcin5+3qyPrd+
Malware Config
Signatures
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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\{49c02d21-45b1-7a22-1ded-d6eccf381c1d} = "C:\\Windows\\System32\\Rundll32.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\00e8d594cc7042a75f4c17574dab6ca1.dll\" DllStart" regsvr32.exe -
Installs/modifies Browser Helper Object 2 TTPs 2 IoCs
BHOs are DLL modules which act as plugins for Internet Explorer.
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{dbf32e1c-0486-0cfb-c4d5-1d40188e723b} regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{dbf32e1c-0486-0cfb-c4d5-1d40188e723b}\NoExplorer = "\"\"" regsvr32.exe -
Modifies registry class 5 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{dbf32e1c-0486-0cfb-c4d5-1d40188e723b}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\00e8d594cc7042a75f4c17574dab6ca1.dll" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{dbf32e1c-0486-0cfb-c4d5-1d40188e723b}\InProcServer32\ThreadingModel = "Apartment" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{dbf32e1c-0486-0cfb-c4d5-1d40188e723b} regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{dbf32e1c-0486-0cfb-c4d5-1d40188e723b}\ = "targetedbanner browser optimizer" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{dbf32e1c-0486-0cfb-c4d5-1d40188e723b}\InProcServer32 regsvr32.exe -
Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 2356 wrote to memory of 2380 2356 regsvr32.exe 16 PID 2356 wrote to memory of 2380 2356 regsvr32.exe 16 PID 2356 wrote to memory of 2380 2356 regsvr32.exe 16 PID 2356 wrote to memory of 2380 2356 regsvr32.exe 16 PID 2356 wrote to memory of 2380 2356 regsvr32.exe 16 PID 2356 wrote to memory of 2380 2356 regsvr32.exe 16 PID 2356 wrote to memory of 2380 2356 regsvr32.exe 16
Processes
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\00e8d594cc7042a75f4c17574dab6ca1.dll1⤵
- Suspicious use of WriteProcessMemory
PID:2356 -
C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\00e8d594cc7042a75f4c17574dab6ca1.dll2⤵
- Adds Run key to start application
- Installs/modifies Browser Helper Object
- Modifies registry class
PID:2380
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