1dd5bf67d2f7e0fc2e95baf84a8bda494668ff304fc6bb910b1c0d58d5a85bee

Analysis

max time kernel
131s
max time network
134s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
10/06/2024, 02:31

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General

Target
ComDlls/XunLeiBHO.dll
Size 193KB
Sample240610-czzmksbd97
SHA256 b574ca8bc2d8c97716ccfe7a2629ba035577eeb4c45a0882ced1f5fa08c5330b
MD5 0ce577e907c45ec8337be8e2a02c69aa
SHA1 0726ab3d0f1433626aadbb9e2996fc18dfec0402
SHA512 9dda369a9fc764754bff8e7c2a8cd5d2060b2aec8372ed15a52620af366ea10cc46f686c1519872472d7fdbbbd8b2a7a2050b433abfa893774918fc28438e4a1
SSDEEP 3072:6e8ltJ43dTzjFARVDux/EYkK3F1Ld31mM6yZIp+rnJJalJBziU:6eOtJgdTW7uuBKjdFmlacKgL
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

adware stealer

Malware Config

Signatures

Loads dropped DLL 2 IoCs

pid	Process
2872	regsvr32.exe
2872	regsvr32.exe

Installs/modifies Browser Helper Object 2 TTPs 2 IoCs

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

stealer adware

Modify Registry

T1112

Browser Extensions

T1176

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{889D2FEB-5411-4565-8998-1DD2C5261283}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{889D2FEB-5411-4565-8998-1DD2C5261283}\ = "ThunderBHO"	regsvr32.exe

Modifies Internet Explorer settings 1 TTPs 4 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\SOFTWARE\Microsoft\Internet Explorer\DownloadUI = "{802F530B-A8F6-4631-AE49-6BACAAC6373E}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Internet Explorer\	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\DownloadUI = "{802F530B-A8F6-4631-AE49-6BACAAC6373E}"	regsvr32.exe
Key created	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Software\Microsoft\Internet Explorer\	regsvr32.exe

Modifies registry class 64 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{802F530B-A8F6-4631-AE49-6BACAAC6373E}\Programmable	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{A1DD29ED-2598-48E9-9793-64A9CD08AC94}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{802F530B-A8F6-4631-AE49-6BACAAC6373E}\ = "XDownloaddManager Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{988934A4-064B-11D3-BB80-00104B35E7F9}\ProxyStubClsid	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{988934A4-064B-11D3-BB80-00104B35E7F9}\TypeLib\ = "{87CA3845-37FE-414C-81CF-E08A7D0F6779}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{889D2FEB-5411-4565-8998-1DD2C5261283}\ProgID\ = "XunLeiBHO.ThunderIEHelper.1"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{889D2FEB-5411-4565-8998-1DD2C5261283}\VersionIndependentProgID\ = "XunLeiBHO.ThunderIEHelper"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{87CA3845-37FE-414C-81CF-E08A7D0F6779}\1.0\FLAGS	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{889D2FEB-5411-4565-8998-1DD2C5261283}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ComDlls\\xunleiBHO_Now.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{A1DD29ED-2598-48E9-9793-64A9CD08AC94}\ProxyStubClsid	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{802F530B-A8F6-4631-AE49-6BACAAC6373E}\Control	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{889D2FEB-5411-4565-8998-1DD2C5261283}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{889D2FEB-5411-4565-8998-1DD2C5261283}\ProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{889D2FEB-5411-4565-8998-1DD2C5261283}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{87CA3845-37FE-414C-81CF-E08A7D0F6779}\1.0\0\win32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{87CA3845-37FE-414C-81CF-E08A7D0F6779}\1.0\HELPDIR	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\XunLeiBHO.XDownloadManager\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{802F530B-A8F6-4631-AE49-6BACAAC6373E}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{802F530B-A8F6-4631-AE49-6BACAAC6373E}\VersionIndependentProgID\ = "XunLeiBHO.XDownloadManager"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\XunLeiBHO.ThunderIEHelper	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\XunLeiBHO.ThunderIEHelper\CurVer	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{889D2FEB-5411-4565-8998-1DD2C5261283}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{988934A4-064B-11D3-BB80-00104B35E7F9}\ = "IXDownloadManager"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{988934A4-064B-11D3-BB80-00104B35E7F9}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{988934A4-064B-11D3-BB80-00104B35E7F9}\TypeLib\Version = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{889D2FEB-5411-4565-8998-1DD2C5261283}\Control	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{87CA3845-37FE-414C-81CF-E08A7D0F6779}\1.0\ = "XunLeiBHO 1.0 Type Library"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{988934A4-064B-11D3-BB80-00104B35E7F9}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\XunLeiBHO.ThunderIEHelper.1\CLSID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{87CA3845-37FE-414C-81CF-E08A7D0F6779}\1.0\HELPDIR\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ComDlls\\"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{988934A4-064B-11D3-BB80-00104B35E7F9}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{87CA3845-37FE-414C-81CF-E08A7D0F6779}\1.0\0	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\XunLeiBHO.XDownloadManager	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{802F530B-A8F6-4631-AE49-6BACAAC6373E}\VersionIndependentProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\XunLeiBHO.ThunderIEHelper\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{889D2FEB-5411-4565-8998-1DD2C5261283}\VersionIndependentProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{889D2FEB-5411-4565-8998-1DD2C5261283}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{87CA3845-37FE-414C-81CF-E08A7D0F6779}\1.0\FLAGS\ = "0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{A1DD29ED-2598-48E9-9793-64A9CD08AC94}\ = "IThunderIEHelper"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{889D2FEB-5411-4565-8998-1DD2C5261283}\Version\ = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{87CA3845-37FE-414C-81CF-E08A7D0F6779}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{87CA3845-37FE-414C-81CF-E08A7D0F6779}\1.0\0\win32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ComDlls\\xunleiBHO_Now.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{A1DD29ED-2598-48E9-9793-64A9CD08AC94}\ProxyStubClsid\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\XunLeiBHO.XDownloadManager\ = "XDownloaddManager Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\XunLeiBHO.XDownloadManager\CurVer	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{988934A4-064B-11D3-BB80-00104B35E7F9}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{889D2FEB-5411-4565-8998-1DD2C5261283}\ = "Thunder Browser Helper"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{802F530B-A8F6-4631-AE49-6BACAAC6373E}\Version	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{802F530B-A8F6-4631-AE49-6BACAAC6373E}\Version\ = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\XunLeiBHO.XDownloadManager\CurVer\ = "XunLeiBHO.XDownloadManager.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{802F530B-A8F6-4631-AE49-6BACAAC6373E}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{802F530B-A8F6-4631-AE49-6BACAAC6373E}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ComDlls\\xunleiBHO_Now.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{A1DD29ED-2598-48E9-9793-64A9CD08AC94}\TypeLib\Version = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\XunLeiBHO.XDownloadManager.1	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\XunLeiBHO.XDownloadManager.1\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{A1DD29ED-2598-48E9-9793-64A9CD08AC94}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{802F530B-A8F6-4631-AE49-6BACAAC6373E}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{87CA3845-37FE-414C-81CF-E08A7D0F6779}\1.0	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{802F530B-A8F6-4631-AE49-6BACAAC6373E}\ProgID\ = "XunLeiBHO.XDownloadManager.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\XunLeiBHO.ThunderIEHelper.1	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\XunLeiBHO.ThunderIEHelper\CLSID\ = "{889D2FEB-5411-4565-8998-1DD2C5261283}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{889D2FEB-5411-4565-8998-1DD2C5261283}\TypeLib\ = "{87CA3845-37FE-414C-81CF-E08A7D0F6779}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{A1DD29ED-2598-48E9-9793-64A9CD08AC94}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{A1DD29ED-2598-48E9-9793-64A9CD08AC94}\TypeLib\ = "{87CA3845-37FE-414C-81CF-E08A7D0F6779}"	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3032 wrote to memory of 2872	3032	regsvr32.exe	90
PID 3032 wrote to memory of 2872	3032	regsvr32.exe	90
PID 3032 wrote to memory of 2872	3032	regsvr32.exe	90

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\ComDlls\XunLeiBHO.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:3032
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\ComDlls\XunLeiBHO.dll
  2⤵
  - Loads dropped DLL
  - Installs/modifies Browser Helper Object
  - Modifies Internet Explorer settings
  - Modifies registry class
  PID:2872

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4280,i,2607710392823067546,4648797561512801463,262144 --variations-seed-version --mojo-platform-channel-handle=2860 /prefetch:8
1⤵
PID:4872

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Browser Extensions

T1176

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

xunleiBHO_Now.dll

Path C:\Users\Admin\AppData\Local\Temp\ComDlls\xunleiBHO_Now.dll
Size 193KB
SHA256 b574ca8bc2d8c97716ccfe7a2629ba035577eeb4c45a0882ced1f5fa08c5330b
MD5 0ce577e907c45ec8337be8e2a02c69aa
SHA1 0726ab3d0f1433626aadbb9e2996fc18dfec0402
SHA512 9dda369a9fc764754bff8e7c2a8cd5d2060b2aec8372ed15a52620af366ea10cc46f686c1519872472d7fdbbbd8b2a7a2050b433abfa893774918fc28438e4a1
SSDEEP 3072:6e8ltJ43dTzjFARVDux/EYkK3F1Ld31mM6yZIp+rnJJalJBziU:6eOtJgdTW7uuBKjdFmlacKgL
MD5 SHA1 SHA512 SSDEEP

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memory/2872-4-0x0000000000AE0000-0x0000000000B11000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads