0618ff4b442e8570ba3f99fc4ffb0337ebf6057dba9fd1e9ee45432a651befe8

Analysis

max time kernel
120s
max time network
123s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
11/03/2024, 19:37

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General

Target

c16d21b396a5fb05f9e37ca03db4a424.dll
Size

157KB
MD5

c16d21b396a5fb05f9e37ca03db4a424
SHA1

79dc22878f5ba6adcea32dfbb782b1e572b44e25
SHA256

0618ff4b442e8570ba3f99fc4ffb0337ebf6057dba9fd1e9ee45432a651befe8
SHA512

7898f598a6a3c0cb1512d7104533edba01493d48d1da50a632c636ed76afad0609ccd22cb7b8615aab172ffb62324f503980f546395807c07ff88eb38cff67a1
SSDEEP

3072:9E5m9koweTbbrMbvT0q8O1cZPzQ7IXMBc+AMP+QfQEhxFyVU78vIjv2sm:n9kwwvP6bQ7yMP+DE8278vIjFm

Score

6^/10

adware bootkit persistence stealer

Malware Config

Signatures

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\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}	regsvr32.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	regsvr32.exe

Modifies registry class 11 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.key	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.key\ = "regfile"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}\ = "WebHelper Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\Wow6432Node\CLSID\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.key\	regsvr32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\Wow6432Node\CLSID\{F9BA1AA9-CAD4-4C14-BDE6-922DFF5F6F38}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F9BA1AA9-CAD4-4C14-BDE6-922DFF5F6F38}\webbrowser = "{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F9BA1AA9-CAD4-4C14-BDE6-922DFF5F6F38}\wversion = "3.4.6"	regsvr32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\Wow6432Node\CLSID\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\c16d21b396a5fb05f9e37ca03db4a424.dll"	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2896 wrote to memory of 2720	2896	regsvr32.exe	28
PID 2896 wrote to memory of 2720	2896	regsvr32.exe	28
PID 2896 wrote to memory of 2720	2896	regsvr32.exe	28
PID 2896 wrote to memory of 2720	2896	regsvr32.exe	28
PID 2896 wrote to memory of 2720	2896	regsvr32.exe	28
PID 2896 wrote to memory of 2720	2896	regsvr32.exe	28
PID 2896 wrote to memory of 2720	2896	regsvr32.exe	28

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\c16d21b396a5fb05f9e37ca03db4a424.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:2896
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\c16d21b396a5fb05f9e37ca03db4a424.dll
  2⤵
  - Installs/modifies Browser Helper Object
  - Writes to the Master Boot Record (MBR)
  - Modifies registry class
  PID:2720

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Browser Extensions

T1176

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2720-0-0x0000000010000000-0x0000000010035000-memory.dmp

Filesize
212KB

Download
memory/2720-1-0x0000000000270000-0x00000000002A0000-memory.dmp

Filesize
192KB

Download
memory/2720-2-0x00000000001E0000-0x00000000001E3000-memory.dmp

Filesize
12KB

Download

Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads