cbe5cdf7ad6e2c7b436b15be3f500205a5d62d9fe07f7744171a19e1486a176f

Analysis

max time kernel
119s
max time network
125s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
30/12/2023, 23:19

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General

Target

RICHTX32.dll
Size

198KB
MD5

722435ba4d18f1704b43e823a12e489a
SHA1

48f3c6e2e14e397055b667e2c8baa85177eb6d44
SHA256

7d59a8cc7a5c16b3b0e0e67c65cf98c45158909f95ca3a5c96b946fdee42c095
SHA512

38fe59c3b38fb7593a695554ead9e56febc068057b8e1c4bb27b6af21f5f2e15ddcfabda2707a72edcedeaa8b0f172a05408b88ae8efff3d259277af03f7de04
SSDEEP

3072:2ZyQLz5i+ES6n2xmV8HlHWuYap8WRN7skMqB/s9FdgJUXsedjuokSER/UmL/W63m:+/i+EbsI8HgNWRNGq+FdgJU3/j6pKrd

Score

1^/10

Malware Config

Signatures

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\ActiveX Compatibility\{3B7C8860-D78F-101B-B9B5-04021C009402}	regsvr32.exe

Modifies registry class 64 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3B7C8860-D78F-101B-B9B5-04021C009402}\Implemented Categories\{40FC6ED4-2438-11CF-A3DB-080036F12502}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{3B7C8863-D78F-101B-B9B5-04021C009402}\1.2\0\win32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\RICHTX32.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{859321D0-3FD1-11CF-8981-00AA00688B10}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{E9A5593C-CAB0-11D1-8C0B-0000F8754DA1}\TypeLib\Version = "1.2"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{E9A5593C-CAB0-11D1-8C0B-0000F8754DA1}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3B7C8860-D78F-101B-B9B5-04021C009402}\ProgID\ = "RICHTEXT.RichtextCtrl.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3B7C8860-D78F-101B-B9B5-04021C009402}\MiscStatus	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{859321D0-3FD1-11CF-8981-00AA00688B10}\TypeLib\Version = "1.2"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{E9A5593C-CAB0-11D1-8C0B-0000F8754DA1}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{3B7C8862-D78F-101B-B9B5-04021C009402}\ = "DRichTextEvents"	regsvr32.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3B7C8860-D78F-101B-B9B5-04021C009402}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{2334D2B3-713E-11CF-8AE5-00AA00C00905}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{2334D2B1-713E-11CF-8AE5-00AA00C00905}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{2334D2B3-713E-11CF-8AE5-00AA00C00905}\TypeLib\Version = "1.2"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{2334D2B3-713E-11CF-8AE5-00AA00C00905}\TypeLib\Version = "1.2"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{ED117630-4090-11CF-8981-00AA00688B10}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{859321D0-3FD1-11CF-8981-00AA00688B10}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\RICHTEXT.RichtextCtrl\ = "Microsoft Rich Textbox Control, version 6.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{3B7C8863-D78F-101B-B9B5-04021C009402}\1.2\0	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{2334D2B1-713E-11CF-8AE5-00AA00C00905}\TypeLib\Version = "1.2"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{ED117630-4090-11CF-8981-00AA00688B10}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{859321D0-3FD1-11CF-8981-00AA00688B10}\ = "IOLEObjects"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{859321D0-3FD1-11CF-8981-00AA00688B10}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{3B7C8862-D78F-101B-B9B5-04021C009402}\TypeLib\ = "{3B7C8863-D78F-101B-B9B5-04021C009402}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3B7C8860-D78F-101B-B9B5-04021C009402}\MiscStatus\ = "0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{AFC634B0-4B8B-11CF-8989-00AA00688B10}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{3B7C8862-D78F-101B-B9B5-04021C009402}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{3B7C8862-D78F-101B-B9B5-04021C009402}\ProxyStubClsid32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{3B7C8862-D78F-101B-B9B5-04021C009402}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3B7C8860-D78F-101B-B9B5-04021C009402}\Version\ = "1.2"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{2334D2B1-713E-11CF-8AE5-00AA00C00905}\TypeLib\Version = "1.2"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{3B7C8862-D78F-101B-B9B5-04021C009402}\TypeLib\Version = "1.2"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{3B7C8862-D78F-101B-B9B5-04021C009402}\ProxyStubClsid32\ = "{00020420-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{78E5A540-1850-11CF-9D53-00AA003C9CB6}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\RICHTX32.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{E9A5593C-CAB0-11D1-8C0B-0000F8754DA1}\TypeLib\ = "{3B7C8863-D78F-101B-B9B5-04021C009402}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3B7C8860-D78F-101B-B9B5-04021C009402}\TypeLib\ = "{3B7C8863-D78F-101B-B9B5-04021C009402}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3B7C8860-D78F-101B-B9B5-04021C009402}\MiscStatus\1\ = "131473"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{3B7C8862-D78F-101B-B9B5-04021C009402}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3B7C8860-D78F-101B-B9B5-04021C009402}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\RICHTEXT.RichtextCtrl	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3B7C8860-D78F-101B-B9B5-04021C009402}\ProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{78E5A540-1850-11CF-9D53-00AA003C9CB6}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\RICHTEXT.RichtextCtrl\CurVer\ = "RICHTEXT.RichtextCtrl.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{2334D2B1-713E-11CF-8AE5-00AA00C00905}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3B7C8860-D78F-101B-B9B5-04021C009402}\ToolboxBitmap32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\RICHTX32.dll, 1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{3B7C8863-D78F-101B-B9B5-04021C009402}\1.2\FLAGS	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{2334D2B3-713E-11CF-8AE5-00AA00C00905}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{ED117630-4090-11CF-8981-00AA00688B10}\TypeLib\Version = "1.2"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{E9A5593C-CAB0-11D1-8C0B-0000F8754DA1}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{3B7C8862-D78F-101B-B9B5-04021C009402}\ = "DRichTextEvents"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\RICHTEXT.RichtextCtrl.1\ = "Microsoft Rich Textbox Control, version 6.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3B7C8860-D78F-101B-B9B5-04021C009402}\Version	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{E9A5593C-CAB0-11D1-8C0B-0000F8754DA1}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3B7C8860-D78F-101B-B9B5-04021C009402}\MiscStatus\1	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{3B7C8863-D78F-101B-B9B5-04021C009402}\1.2\HELPDIR\	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{2334D2B1-713E-11CF-8AE5-00AA00C00905}\TypeLib\ = "{3B7C8863-D78F-101B-B9B5-04021C009402}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{E9A5593C-CAB0-11D1-8C0B-0000F8754DA1}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{E9A5593C-CAB0-11D1-8C0B-0000F8754DA1}\TypeLib\Version = "1.2"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\RICHTEXT.RichtextCtrl\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3B7C8860-D78F-101B-B9B5-04021C009402}\Control	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{3B7C8863-D78F-101B-B9B5-04021C009402}\1.2\HELPDIR	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{E9A5593C-CAB0-11D1-8C0B-0000F8754DA1}\ = "IRichText"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3B7C8860-D78F-101B-B9B5-04021C009402}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\RICHTX32.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3B7C8860-D78F-101B-B9B5-04021C009402}\Implemented Categories	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2004 wrote to memory of 1640	2004	regsvr32.exe	28
PID 2004 wrote to memory of 1640	2004	regsvr32.exe	28
PID 2004 wrote to memory of 1640	2004	regsvr32.exe	28
PID 2004 wrote to memory of 1640	2004	regsvr32.exe	28
PID 2004 wrote to memory of 1640	2004	regsvr32.exe	28
PID 2004 wrote to memory of 1640	2004	regsvr32.exe	28
PID 2004 wrote to memory of 1640	2004	regsvr32.exe	28

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\RICHTX32.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:2004
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\RICHTX32.dll
  2⤵
  - Modifies Internet Explorer settings
  - Modifies registry class
  PID:1640

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Windows 7 deprecation

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