29f1c15cba3e8f8657d6ff4babdf6da15cd3fa6dcb8b8c80b671620431b70dc2

Analysis

max time kernel
146s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
25-12-2023 18:44

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General

Target

35675b0b76869f60fa5e003f937d5f5d.exe
Size

55KB
MD5

35675b0b76869f60fa5e003f937d5f5d
SHA1

29835a7c2aa46103ca326c20358ccc2a466077df
SHA256

29f1c15cba3e8f8657d6ff4babdf6da15cd3fa6dcb8b8c80b671620431b70dc2
SHA512

b62d37df67721d886c45b09be1474a1158f530a3bf5da26a32ce7728c9b3c8a836e4c80d57bf6d2086be64fe8504f98753acb8317bd7ce23382ba3393e8ace4e
SSDEEP

768:4ZPRAqcIvdy2wTh4o+uUqe1J0Sw1IR0Q8aIA7O/HNipFgkRZETTHOWgZVl01LCEi:4ZPRPcSk3eFJxQA0QPoNhTLCEaa2

Score

8^/10

adware persistence stealer upx

Malware Config

Signatures

Sets DLL path for service in the registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Utility\Parameters\ServiceDll = "%SystemRoot%\\system32\\toaksie.dll"	35675b0b76869f60fa5e003f937d5f5d.exe

Loads dropped DLL 2 IoCs

pid	Process
2228	svchost.exe
3672	regsvr32.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/1268-6-0x0000000000400000-0x0000000000436000-memory.dmp	upx
behavioral2/memory/1268-0-0x0000000000400000-0x0000000000436000-memory.dmp	upx

Installs/modifies Browser Helper Object 2 TTPs 1 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\{FFFFFCF1-4B15-11D1-ABED-709549C10000}	regsvr32.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\lshell.ini	35675b0b76869f60fa5e003f937d5f5d.exe
File created	C:\Windows\SysWOW64\toaksie.dll	35675b0b76869f60fa5e003f937d5f5d.exe
File created	C:\Windows\SysWOW64\devtlde.dll	35675b0b76869f60fa5e003f937d5f5d.exe

Modifies registry class 42 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{CE7C3CEF-4B15-11D1-ABED-709549C10000}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{CE7C3CEF-4B15-11D1-ABED-709549C10000}\TypeLib\ = "{CE7C3CE2-4B15-11D1-ABED-709549C10000}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FFFFFCF1-4B15-11D1-ABED-709549C10000}\ = "Microsoft Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{CE7C3CE2-4B15-11D1-ABED-709549C10000}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FFFFFCF1-4B15-11D1-ABED-709549C10000}\InprocServer32\ = "C:\\Windows\\SysWow64\\devtlde.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{CE7C3CE2-4B15-11D1-ABED-709549C10000}\1.0\FLAGS\ = "0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{CE7C3CEF-4B15-11D1-ABED-709549C10000}\TypeLib\ = "{CE7C3CE2-4B15-11D1-ABED-709549C10000}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{CE7C3CEF-4B15-11D1-ABED-709549C10000}\ = "IIEHlprObj"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj.1\CLSID\ = "{FFFFFCF1-4B15-11D1-ABED-709549C10000}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FFFFFCF1-4B15-11D1-ABED-709549C10000}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{CE7C3CE2-4B15-11D1-ABED-709549C10000}\1.0\FLAGS	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{CE7C3CE2-4B15-11D1-ABED-709549C10000}\1.0\0	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{CE7C3CE2-4B15-11D1-ABED-709549C10000}\1.0\HELPDIR	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{CE7C3CEF-4B15-11D1-ABED-709549C10000}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj\CurVer	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{CE7C3CE2-4B15-11D1-ABED-709549C10000}\1.0\ = "Microsoft 2.0 Type Library"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{CE7C3CE2-4B15-11D1-ABED-709549C10000}\1.0\0\win32\ = "C:\\Windows\\SysWow64\\devtlde.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{CE7C3CEF-4B15-11D1-ABED-709549C10000}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{CE7C3CEF-4B15-11D1-ABED-709549C10000}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj.1	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FFFFFCF1-4B15-11D1-ABED-709549C10000}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{CE7C3CE2-4B15-11D1-ABED-709549C10000}\1.0\HELPDIR\ = "C:\\Windows\\SysWow64\\"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{CE7C3CEF-4B15-11D1-ABED-709549C10000}\ProxyStubClsid32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{CE7C3CEF-4B15-11D1-ABED-709549C10000}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{CE7C3CEF-4B15-11D1-ABED-709549C10000}\TypeLib\Version = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FFFFFCF1-4B15-11D1-ABED-709549C10000}\VersionIndependentProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FFFFFCF1-4B15-11D1-ABED-709549C10000}\VersionIndependentProgID\ = "Microsoft.Microsoft"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FFFFFCF1-4B15-11D1-ABED-709549C10000}\ProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FFFFFCF1-4B15-11D1-ABED-709549C10000}\Programmable	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{CE7C3CE2-4B15-11D1-ABED-709549C10000}\1.0	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{CE7C3CEF-4B15-11D1-ABED-709549C10000}\ = "IIEHlprObj"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{CE7C3CEF-4B15-11D1-ABED-709549C10000}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj.1\ = "Microsoft Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj\CurVer\ = "Microsoft.Microsoft.1"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{CE7C3CEF-4B15-11D1-ABED-709549C10000}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj\ = "Microsoft Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FFFFFCF1-4B15-11D1-ABED-709549C10000}\ProgID\ = "Microsoft.Microsoft.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{CE7C3CE2-4B15-11D1-ABED-709549C10000}\1.0\0\win32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{CE7C3CEF-4B15-11D1-ABED-709549C10000}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj.1\CLSID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FFFFFCF1-4B15-11D1-ABED-709549C10000}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	1268	35675b0b76869f60fa5e003f937d5f5d.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1268 wrote to memory of 3672	1268	35675b0b76869f60fa5e003f937d5f5d.exe	20
PID 1268 wrote to memory of 3672	1268	35675b0b76869f60fa5e003f937d5f5d.exe	20
PID 1268 wrote to memory of 3672	1268	35675b0b76869f60fa5e003f937d5f5d.exe	20
PID 1268 wrote to memory of 1740	1268	35675b0b76869f60fa5e003f937d5f5d.exe	19
PID 1268 wrote to memory of 1740	1268	35675b0b76869f60fa5e003f937d5f5d.exe	19
PID 1268 wrote to memory of 1740	1268	35675b0b76869f60fa5e003f937d5f5d.exe	19

C:\Users\Admin\AppData\Local\Temp\35675b0b76869f60fa5e003f937d5f5d.exe
"C:\Users\Admin\AppData\Local\Temp\35675b0b76869f60fa5e003f937d5f5d.exe"
1⤵
- Sets DLL path for service in the registry
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1268
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del C:\Users\Admin\AppData\Local\Temp\35675B~1.EXE > nul
  2⤵
  PID:1740
- C:\Windows\SysWOW64\regsvr32.exe
  regsvr32.exe /s C:\Windows\system32\devtlde.dll
  2⤵
  - Loads dropped DLL
  - Installs/modifies Browser Helper Object
  - Modifies registry class
  PID:3672

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k netsvcs
1⤵
- Loads dropped DLL
PID:2228

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Browser Extensions

T1176

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\lshell.ini

Filesize
22B

MD5
b25414aa8fcdf0f91a00becd6f0afd88

SHA1
2ac907528512271c458bd9d4db7280a9981c2753

SHA256
2861775306f09ecd288a200d6fd020e587b003875bfd983a58fb56bee3691ccd

SHA512
37e5829debd24482bf66b327fc80e212c31557016fdbf64168dd3f5a7fc218389ce7924faa3e99589f62edc281209fc5ff094f93220aa4b824cd4249164a7afe

Download Submit
\??\c:\windows\SysWOW64\toaksie.dll

Filesize
76KB

MD5
362c6e19f8bb56abcca61f97520ba4cf

SHA1
0766358ffed15dd44b6b9cf08fc35cb3a9226ad4

SHA256
43c486b2686a19bf2f9d8f625b9b70b4e80dc81252de6c59c10f9842d1feb0d0

SHA512
97d5163c2d8e6e04f7ca1c013f038e77748c835f7ef5c03f70fffa7412cb0f6103fc6d0c2f3c79be11bcc44ef9f62ca005ebbd0f027386c0d780a40f2364e714

Download Submit
memory/1268-6-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/1268-0-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads