866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919

General

Target

866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Size

3.0MB
MD5

e1fa83f71697f2d2bc0179260e52a47f
SHA1

177e8a80de6b6e6f666956624f2663c6c45e0e2c
SHA256

866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919
SHA512

8d4a18f8fdb70937b88b9bb13521650fd0ec4f8a7ba7e605f5e6338510321ee00f6cc3a2a5c09363d9670521d535867f925249bbbbefb7df779fcf20327e2b92
SSDEEP

49152:9a+rpFCFSaMUnkl+Px8Av5jt+L83m6veJ2ujTEhAWSHZfynkmt:9aCpFCnkl+pr5jt+La28unEi1Ok

Score

8^/10

adware discovery persistence spyware stealer

Malware Config

Signatures

Registers COM server for autorun 1 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Processes:

regsvr32.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\InprocServer32\ = "C:\\Program Files (x86)\\cosstminn\\YWO.x64.dll"	regsvr32.exe

Loads dropped DLL 3 IoCs

Processes:

866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exeregsvr32.exeregsvr32.exe

pid process

4548 866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
5028 regsvr32.exe
4044 regsvr32.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops Chrome extension 5 IoCs

Processes:

866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Extensions\cgfencijfhkeamjkcanjdndjkiibojhd\2.0\manifest.json	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
File created	C:\Users\Administrator\AppData\Local\Google\Chrome\User Data\Default\Extensions\cgfencijfhkeamjkcanjdndjkiibojhd\2.0\manifest.json	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
File created	C:\Users\DefaultAccount\AppData\Local\Google\Chrome\User Data\Default\Extensions\cgfencijfhkeamjkcanjdndjkiibojhd\2.0\manifest.json	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
File created	C:\Users\Guest\AppData\Local\Google\Chrome\User Data\Default\Extensions\cgfencijfhkeamjkcanjdndjkiibojhd\2.0\manifest.json	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
File created	C:\Users\WDAGUtilityAccount\AppData\Local\Google\Chrome\User Data\Default\Extensions\cgfencijfhkeamjkcanjdndjkiibojhd\2.0\manifest.json	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe

Installs/modifies Browser Helper Object 2 TTPs 8 IoCs

BHOs are DLL modules which act as plugins for Internet Explorer.

stealer adware

Modify Registry

T1112

Browser Extensions

T1176

Processes:

regsvr32.exe866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe

description	ioc	process
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\ = "cosstminn"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\NoExplorer = "1"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\ = "cosstminn"	regsvr32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\NoExplorer = "1"	regsvr32.exe

Drops file in System32 directory 4 IoCs

Processes:

866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe

description	ioc	process
File opened for modification	C:\Windows\System32\GroupPolicy	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
File opened for modification	C:\Windows\SysWOW64\GroupPolicy\gpt.ini	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
File created	C:\Windows\System32\GroupPolicy\Machine\Registry.pol	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
File opened for modification	C:\Windows\System32\GroupPolicy\GPT.INI	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe

Drops file in Program Files directory 8 IoCs

Processes:

866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe

description	ioc	process
File created	C:\Program Files (x86)\cosstminn\YWO.dat	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
File opened for modification	C:\Program Files (x86)\cosstminn\YWO.dat	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
File created	C:\Program Files (x86)\cosstminn\YWO.x64.dll	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
File opened for modification	C:\Program Files (x86)\cosstminn\YWO.x64.dll	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
File created	C:\Program Files (x86)\cosstminn\YWO.dll	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
File opened for modification	C:\Program Files (x86)\cosstminn\YWO.dll	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
File created	C:\Program Files (x86)\cosstminn\YWO.tlb	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
File opened for modification	C:\Program Files (x86)\cosstminn\YWO.tlb	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe

Modifies Internet Explorer settings 1 TTPs 8 IoCs

adware spyware

Modify Registry

T1112

Processes:

866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exeregsvr32.exe

description	ioc	process
Key deleted	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\ApprovedExtensionsMigration	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key deleted	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\MICROSOFT\INTERNET EXPLORER\APPROVEDEXTENSIONSMIGRATION\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}	regsvr32.exe
Key deleted	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\ApprovedExtensionsMigration	regsvr32.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\ApprovedExtensionsMigration	regsvr32.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\ApprovedExtensionsMigration\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}	regsvr32.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\ApprovedExtensionsMigration	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\ApprovedExtensionsMigration\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key deleted	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\MICROSOFT\INTERNET EXPLORER\APPROVEDEXTENSIONSMIGRATION\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe

Modifies registry class 64 IoCs

Processes:

866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exeregsvr32.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\VersionIndependentProgID\ = "cosstminn"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{9B41579A-1996-42F9-8F84-7B7786818CEF}\ProxyStubClsid32	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{9B41579A-1996-42F9-8F84-7B7786818CEF}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{7041156A-0D2B-4DCD-A8EE-D0608BFCB2D0}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{7041156A-0D2B-4DCD-A8EE-D0608BFCB2D0}\TypeLib\Version = "1.0"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{7041156A-0D2B-4DCD-A8EE-D0608BFCB2D0}\TypeLib	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\cosstminn.cosstminn\CurVer	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{9B41579A-1996-42F9-8F84-7B7786818CEF}\ = "IPlaghinMein"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{7041156A-0D2B-4DCD-A8EE-D0608BFCB2D0}\ProxyStubClsid32	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{7041156A-0D2B-4DCD-A8EE-D0608BFCB2D0}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EAF749DC-CD87-4B04-B22A-D4AC3FBCB2BC}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EAF749DC-CD87-4B04-B22A-D4AC3FBCB2BC}\TypeLib\ = "{E2343056-CC08-46AC-B898-BFC7ACF4E755}"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\cosstminn.cosstminn\CLSID\ = "{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{E2343056-CC08-46AC-B898-BFC7ACF4E755}\1.0\0\win32	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{9B41579A-1996-42F9-8F84-7B7786818CEF}\TypeLib\ = "{E2343056-CC08-46AC-B898-BFC7ACF4E755}"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{9B41579A-1996-42F9-8F84-7B7786818CEF}\TypeLib\ = "{E2343056-CC08-46AC-B898-BFC7ACF4E755}"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{7041156A-0D2B-4DCD-A8EE-D0608BFCB2D0}\TypeLib\Version = "1.0"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{EAF749DC-CD87-4B04-B22A-D4AC3FBCB2BC}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{EAF749DC-CD87-4B04-B22A-D4AC3FBCB2BC}\TypeLib\Version = "1.0"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\ProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\ProgID\ = "cosstminn.2.0"	regsvr32.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\ProgID	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\Programmable	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{9B41579A-1996-42F9-8F84-7B7786818CEF}	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{7041156A-0D2B-4DCD-A8EE-D0608BFCB2D0}	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{7041156A-0D2B-4DCD-A8EE-D0608BFCB2D0}\TypeLib	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{7041156A-0D2B-4DCD-A8EE-D0608BFCB2D0}\TypeLib\ = "{E2343056-CC08-46AC-B898-BFC7ACF4E755}"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\InprocServer32	regsvr32.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\ProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{9B41579A-1996-42F9-8F84-7B7786818CEF}\TypeLib	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\VersionIndependentProgID	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{E2343056-CC08-46AC-B898-BFC7ACF4E755}\1.0\0\win32\ = "C:\\Program Files (x86)\\cosstminn\\YWO.tlb"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{9B41579A-1996-42F9-8F84-7B7786818CEF}\ProxyStubClsid32	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{9B41579A-1996-42F9-8F84-7B7786818CEF}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{7041156A-0D2B-4DCD-A8EE-D0608BFCB2D0}	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{7041156A-0D2B-4DCD-A8EE-D0608BFCB2D0}\ = "ILocalStorage"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{EAF749DC-CD87-4B04-B22A-D4AC3FBCB2BC}\TypeLib	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\InprocServer32\ = "C:\\Program Files (x86)\\cosstminn\\YWO.dll"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EAF749DC-CD87-4B04-B22A-D4AC3FBCB2BC}\TypeLib	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{9B41579A-1996-42F9-8F84-7B7786818CEF}\TypeLib	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EAF749DC-CD87-4B04-B22A-D4AC3FBCB2BC}\TypeLib\Version = "1.0"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\Implemented Categories\{59FB2056-D625-48D0-A944-1A85B5AB2640}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{E2343056-CC08-46AC-B898-BFC7ACF4E755}\1.0	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\cosstminn.cosstminn\CLSID	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\ProgID\ = "cosstminn.2.0"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\InprocServer32\ThreadingModel = "Apartment"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{E2343056-CC08-46AC-B898-BFC7ACF4E755}	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{E2343056-CC08-46AC-B898-BFC7ACF4E755}\1.0\0	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{9B41579A-1996-42F9-8F84-7B7786818CEF}\TypeLib\Version = "1.0"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{EAF749DC-CD87-4B04-B22A-D4AC3FBCB2BC}\TypeLib\ = "{E2343056-CC08-46AC-B898-BFC7ACF4E755}"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\cosstminn.cosstminn.2.0\ = "cosstminn"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\ = "cosstminn"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{7041156A-0D2B-4DCD-A8EE-D0608BFCB2D0}\ = "ILocalStorage"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{E2343056-CC08-46AC-B898-BFC7ACF4E755}\1.0\HELPDIR	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\Implemented Categories\{59FB2056-D625-48D0-A944-1A85B5AB2640}	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{E2343056-CC08-46AC-B898-BFC7ACF4E755}\1.0\FLAGS\ = "0"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{9B41579A-1996-42F9-8F84-7B7786818CEF}	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{EAF749DC-CD87-4B04-B22A-D4AC3FBCB2BC}\ProxyStubClsid32	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\VersionIndependentProgID	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{9B41579A-1996-42F9-8F84-7B7786818CEF}\ = "IPlaghinMein"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{E2343056-CC08-46AC-B898-BFC7ACF4E755}\1.0\HELPDIR\ = "C:\\Program Files (x86)\\cosstminn"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\Programmable	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043}\Implemented Categories	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

Processes:

866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe

pid	process
4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe

description	pid	process
Token: SeDebugPrivilege	4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Token: SeDebugPrivilege	4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Token: SeDebugPrivilege	4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Token: SeDebugPrivilege	4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Token: SeDebugPrivilege	4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
Token: SeDebugPrivilege	4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exeregsvr32.exe

description	pid	process	target process
PID 4548 wrote to memory of 5028	4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe	regsvr32.exe
PID 4548 wrote to memory of 5028	4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe	regsvr32.exe
PID 4548 wrote to memory of 5028	4548	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe	regsvr32.exe
PID 5028 wrote to memory of 4044	5028	regsvr32.exe	regsvr32.exe
PID 5028 wrote to memory of 4044	5028	regsvr32.exe	regsvr32.exe

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

T1112

Processes:

866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Ext\CLSID\{C55FCADF-468B-1C8D-3BCF-AF53E06F2043} = "1"	866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe

C:\Users\Admin\AppData\Local\Temp\866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe
"C:\Users\Admin\AppData\Local\Temp\866b83a2d4dc367718836d3f657503b381fa99a755aa533e3d95c79ac6643919.exe"
1⤵
- Loads dropped DLL
- Drops Chrome extension
- Installs/modifies Browser Helper Object
- Drops file in System32 directory
- Drops file in Program Files directory
- Modifies Internet Explorer settings
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:4548

C:\Windows\SysWOW64\regsvr32.exe
regsvr32.exe /s "C:\Program Files (x86)\cosstminn\YWO.x64.dll"
2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:5028

C:\Windows\system32\regsvr32.exe
/s "C:\Program Files (x86)\cosstminn\YWO.x64.dll"
3⤵
- Registers COM server for autorun
- Loads dropped DLL
- Installs/modifies Browser Helper Object
- Modifies Internet Explorer settings
- Modifies registry class
PID:4044

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -s WPDBusEnum
1⤵
PID:1180

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s fhsvc
1⤵
PID:1764

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Browser Extensions

1

T1176

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

3

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\cosstminn\YWO.dat

Filesize
4KB

MD5
400099cea6802324f899a2c1182e4b5b

SHA1
b267f53c535a6c02341d425a0e8813aebd10b201

SHA256
cd204f58b118f980aaadc4f68608dd1b288ea20ecddfc0784bf31b5b0c360201

SHA512
a3f5b39956dfe4ab6bd74aca8d02a089ace5185500e2b6d6e77e935ac1f1a824c58ec8e35e074f99cf23704df632ee208558ad08981c97c64e0337845470bb13

Download Submit
C:\Program Files (x86)\cosstminn\YWO.dll

Filesize
610KB

MD5
8c17652e3d7951221e9afeb07a4c71e6

SHA1
68aeb97e567f4e705d4126a60bd94ef567760b61

SHA256
4085d30c67ed3d336266d7dd5c2a1bfac8e6ba45f9240b31283e43ac9555ea24

SHA512
6f21a4058579e7babe1ee44199fc41bf282d6e0c92352c636f39160c7c9e61191f9eb4186dcba8f0a25cf51f97c181e3027f2bbcee9f723a85de159121655065

Download Submit
C:\Program Files (x86)\cosstminn\YWO.tlb

Filesize
3KB

MD5
3fdfaa71c68f31e83daf46b214ff8c89

SHA1
fe4a9d2172e9a94570f46fc151b94f90db08da77

SHA256
2d4e42ee22cf2171777f6f2aa232df7a2ad3445b6988ee2f2666ec2a863aca93

SHA512
392faf168a97d35fc4fa414844cae3662d231f18d5db55891e6cf281f34cef590cb94f6a650565b5b2bdf2c0899dc872c432106449604079f3283da241f2a100

Download Submit
C:\Program Files (x86)\cosstminn\YWO.x64.dll

Filesize
687KB

MD5
cd1a0489adc1f05fc31a65eb26e08c92

SHA1
95af9d7095d36dee3e4d2e2952ca1a199c2bb596

SHA256
b63804fa2e99e3bd6b8dac3e203cba731ae2317e1fdae32014a88ff40a7a4755

SHA512
52bc43818912822eb746196aea22b11287a914f156c2838e8c2bc01469758ac18f0575df3d05f7b37042e8c3fd88d5c905d69f359963d5d57c42d0bd7b073c19

Download Submit
C:\Program Files (x86)\cosstminn\YWO.x64.dll

Filesize
687KB

MD5
cd1a0489adc1f05fc31a65eb26e08c92

SHA1
95af9d7095d36dee3e4d2e2952ca1a199c2bb596

SHA256
b63804fa2e99e3bd6b8dac3e203cba731ae2317e1fdae32014a88ff40a7a4755

SHA512
52bc43818912822eb746196aea22b11287a914f156c2838e8c2bc01469758ac18f0575df3d05f7b37042e8c3fd88d5c905d69f359963d5d57c42d0bd7b073c19

Download Submit
C:\Program Files (x86)\cosstminn\YWO.x64.dll

Filesize
687KB

MD5
cd1a0489adc1f05fc31a65eb26e08c92

SHA1
95af9d7095d36dee3e4d2e2952ca1a199c2bb596

SHA256
b63804fa2e99e3bd6b8dac3e203cba731ae2317e1fdae32014a88ff40a7a4755

SHA512
52bc43818912822eb746196aea22b11287a914f156c2838e8c2bc01469758ac18f0575df3d05f7b37042e8c3fd88d5c905d69f359963d5d57c42d0bd7b073c19

Download Submit
memory/4044-156-0x0000000000000000-mapping.dmp

Download
memory/4548-142-0x00000000016F0000-0x00000000016F3000-memory.dmp

Filesize
12KB

Download
memory/4548-143-0x00000000016F0000-0x00000000016F3000-memory.dmp

Filesize
12KB

Download
memory/4548-145-0x00000000016F0000-0x00000000016F3000-memory.dmp

Filesize
12KB

Download
memory/4548-146-0x00000000016F0000-0x00000000016F3000-memory.dmp

Filesize
12KB

Download
memory/4548-147-0x00000000016F0000-0x00000000016F3000-memory.dmp

Filesize
12KB

Download
memory/4548-148-0x00000000016F0000-0x00000000016F3000-memory.dmp

Filesize
12KB

Download
memory/4548-149-0x00000000016F0000-0x00000000016F3000-memory.dmp

Filesize
12KB

Download
memory/4548-150-0x00000000016F0000-0x00000000016F3000-memory.dmp

Filesize
12KB

Download
memory/4548-151-0x00000000016F0000-0x00000000016F3000-memory.dmp

Filesize
12KB

Download
memory/4548-144-0x00000000016F0000-0x00000000016F3000-memory.dmp

Filesize
12KB

Download
memory/4548-137-0x00000000016F0000-0x00000000016F3000-memory.dmp

Filesize
12KB

Download
memory/4548-132-0x0000000000400000-0x00000000004A0000-memory.dmp

Filesize
640KB

Download
memory/4548-141-0x00000000016F0000-0x00000000016F3000-memory.dmp

Filesize
12KB

Download
memory/4548-140-0x00000000016F0000-0x00000000016F3000-memory.dmp

Filesize
12KB

Download
memory/4548-138-0x00000000016F0000-0x00000000016F3000-memory.dmp

Filesize
12KB

Download
memory/4548-139-0x00000000016F0000-0x00000000016F3000-memory.dmp

Filesize
12KB

Download
memory/5028-153-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads