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Analysis
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max time kernel
122s -
max time network
126s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system -
submitted
25/12/2023, 14:27
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
258e826eb3f4d85ba43291f7b25e8f39.dll
Resource
win7-20231215-en
3 signatures
150 seconds
General
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Target
258e826eb3f4d85ba43291f7b25e8f39.dll
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Size
590KB
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MD5
258e826eb3f4d85ba43291f7b25e8f39
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SHA1
75d01009eb89dfc7fc92d6398cb66de59c3e5a9c
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SHA256
73aeadadd9d51ea6e6dd7c97fded151b55f44a84298c73dd6391b13ae784a724
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SHA512
6c00e7ae60ef6845f7a2b136eaba8d9441d02014239db50ac5ff9d34ed80cca4dc6bb1a78b08471ebca7c362a366e2be9640ba61312be476d55068306131b502
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SSDEEP
12288:Ds+0UWObHRykUOyDyO1E41o7plqAXMGl9/XxOb+QsGNsgH:Dn0pO7w97DbOxXMg/XxOb+Qbsg
Malware Config
Signatures
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Installs/modifies Browser Helper Object 2 TTPs 1 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\{CC01FC6C-772C-2B71-F6BF-2581AB8D1185} regsvr32.exe -
Modifies registry class 11 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-772C-2B71-F6BF-2581AB8D1185}\InprocServer32 regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-772C-2B71-F6BF-2581AB8D1185}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\258e826eb3f4d85ba43291f7b25e8f39.dll" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-772C-2B71-F6BF-2581AB8D1185}\InprocServer32\ThreadingModel = "Apartment" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\258e826eb3f4d85ba43291f7b25e8f39.brm inc\ = "brm inc" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\258e826eb3f4d85ba43291f7b25e8f39.brm inc\Clsid regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\258e826eb3f4d85ba43291f7b25e8f39.brm inc\Clsid\ = "{CC01FC6C-772C-2B71-F6BF-2581AB8D1185}" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-772C-2B71-F6BF-2581AB8D1185}\ = "brm inc" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\258e826eb3f4d85ba43291f7b25e8f39.brm inc regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-772C-2B71-F6BF-2581AB8D1185}\ProgID regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-772C-2B71-F6BF-2581AB8D1185}\ProgID\ = "258e826eb3f4d85ba43291f7b25e8f39.brm inc" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CC01FC6C-772C-2B71-F6BF-2581AB8D1185} regsvr32.exe -
Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 1816 wrote to memory of 2668 1816 regsvr32.exe 28 PID 1816 wrote to memory of 2668 1816 regsvr32.exe 28 PID 1816 wrote to memory of 2668 1816 regsvr32.exe 28 PID 1816 wrote to memory of 2668 1816 regsvr32.exe 28 PID 1816 wrote to memory of 2668 1816 regsvr32.exe 28 PID 1816 wrote to memory of 2668 1816 regsvr32.exe 28 PID 1816 wrote to memory of 2668 1816 regsvr32.exe 28
Processes
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\258e826eb3f4d85ba43291f7b25e8f39.dll1⤵
- Suspicious use of WriteProcessMemory
PID:1816 -
C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\258e826eb3f4d85ba43291f7b25e8f39.dll2⤵
- Installs/modifies Browser Helper Object
- Modifies registry class
PID:2668
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