8bf4ff8b13ccc9c05bf0c68e8adef10a94e833ecfd5161c0d0ad10d479d9c4db

Analysis

max time kernel
137s
max time network
163s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
02/02/2024, 15:31

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General

Target
89e0f12a09415076760c6de4d7656d23.dll
Size 71KB
Sample240202-sx2bdsbefr
SHA256 8bf4ff8b13ccc9c05bf0c68e8adef10a94e833ecfd5161c0d0ad10d479d9c4db
MD5 89e0f12a09415076760c6de4d7656d23
SHA1 e4a2c2703100a9549c87d60d12df4cf49e40dcda
SHA512 9479797c88d700de7af94358200258759a3f86c53a76de28a10a50faec7774026bf17bc166e3f877c1e4175f16f93fb98655d8189e788398d0250a12ecaa6ce0
SSDEEP 1536:0MkL6qnFj7TPRj8I1ehF7L3LQBzoBMHKGXppAtxpBcdPmW:vkFjfPRjV2Z3MC2HXzODc5v
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

adware stealer upx

Malware Config

Signatures

UPX packed file 1 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1028-0-0x0000000010000000-0x0000000010031000-memory.dmp	upx

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
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{EF4A79B4-070E-4645-B732-8A4935D18A11}\NoExplorer = "1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{EF4A79B4-070E-4645-B732-8A4935D18A11}	regsvr32.exe

Modifies registry class 46 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WYBHO.wybhotool	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WYBHO.wybhotool\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF4A79B4-070E-4645-B732-8A4935D18A11}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF4A79B4-070E-4645-B732-8A4935D18A11}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A13FA9A7-4644-4233-8192-891801DC2203}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A13FA9A7-4644-4233-8192-891801DC2203}\1.0\0\win32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\89e0f12a09415076760c6de4d7656d23.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{4BC48C56-7723-4FE8-8BFA-54A092970781}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{4BC48C56-7723-4FE8-8BFA-54A092970781}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF4A79B4-070E-4645-B732-8A4935D18A11}\ProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF4A79B4-070E-4645-B732-8A4935D18A11}\VersionIndependentProgID\ = "WYBHO.wybhotool"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF4A79B4-070E-4645-B732-8A4935D18A11}\Programmable	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A13FA9A7-4644-4233-8192-891801DC2203}\1.0\FLAGS\ = "0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A13FA9A7-4644-4233-8192-891801DC2203}\1.0\0	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{4BC48C56-7723-4FE8-8BFA-54A092970781}\TypeLib\ = "{A13FA9A7-4644-4233-8192-891801DC2203}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{4BC48C56-7723-4FE8-8BFA-54A092970781}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WYBHO.wybhotool.1	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A13FA9A7-4644-4233-8192-891801DC2203}\1.0\0\win32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A13FA9A7-4644-4233-8192-891801DC2203}\1.0\HELPDIR\ = "C:\\Users\\Admin\\AppData\\Local\\Temp"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{4BC48C56-7723-4FE8-8BFA-54A092970781}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{4BC48C56-7723-4FE8-8BFA-54A092970781}\ = "Iwybhotool"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{4BC48C56-7723-4FE8-8BFA-54A092970781}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WYBHO.wybhotool\ = "wybhotool Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WYBHO.wybhotool\CLSID\ = "{EF4A79B4-070E-4645-B732-8A4935D18A11}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WYBHO.wybhotool\CurVer	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{4BC48C56-7723-4FE8-8BFA-54A092970781}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{4BC48C56-7723-4FE8-8BFA-54A092970781}\TypeLib\Version = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{4BC48C56-7723-4FE8-8BFA-54A092970781}\ProxyStubClsid32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{4BC48C56-7723-4FE8-8BFA-54A092970781}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WYBHO.wybhotool.1\CLSID\ = "{EF4A79B4-070E-4645-B732-8A4935D18A11}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF4A79B4-070E-4645-B732-8A4935D18A11}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF4A79B4-070E-4645-B732-8A4935D18A11}\ProgID\ = "WYBHO.wybhotool.1"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF4A79B4-070E-4645-B732-8A4935D18A11}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\89e0f12a09415076760c6de4d7656d23.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A13FA9A7-4644-4233-8192-891801DC2203}\1.0\ = "WYBHO 1.0 Type Library"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{4BC48C56-7723-4FE8-8BFA-54A092970781}\ = "Iwybhotool"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF4A79B4-070E-4645-B732-8A4935D18A11}\ = "wybhotool Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF4A79B4-070E-4645-B732-8A4935D18A11}\VersionIndependentProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF4A79B4-070E-4645-B732-8A4935D18A11}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF4A79B4-070E-4645-B732-8A4935D18A11}\TypeLib\ = "{A13FA9A7-4644-4233-8192-891801DC2203}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{4BC48C56-7723-4FE8-8BFA-54A092970781}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WYBHO.wybhotool.1\CLSID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WYBHO.wybhotool\CurVer\ = "WYBHO.wybhotool.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A13FA9A7-4644-4233-8192-891801DC2203}\1.0\HELPDIR	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WYBHO.wybhotool.1\ = "wybhotool Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A13FA9A7-4644-4233-8192-891801DC2203}\1.0	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A13FA9A7-4644-4233-8192-891801DC2203}\1.0\FLAGS	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{4BC48C56-7723-4FE8-8BFA-54A092970781}\TypeLib\ = "{A13FA9A7-4644-4233-8192-891801DC2203}"	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1724 wrote to memory of 1028	1724	regsvr32.exe	83
PID 1724 wrote to memory of 1028	1724	regsvr32.exe	83
PID 1724 wrote to memory of 1028	1724	regsvr32.exe	83

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\89e0f12a09415076760c6de4d7656d23.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:1724
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\89e0f12a09415076760c6de4d7656d23.dll
  2⤵
  - Installs/modifies Browser Helper Object
  - Modifies registry class
  PID:1028

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

Replay Monitor

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Downloads

memory/1028-0-0x0000000010000000-0x0000000010031000-memory.dmp

Download