bb60234f2c187169ab171f23e835233c4608dbaba12c43a571c6914ea7bb6c16

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
06/03/2024, 11:25

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General

Target

$PROGRAMFILES/Mozilla Firefox/$R1.dll
Size

2.4MB
MD5

a79958b30f61bb57d390bfcc579900fe
SHA1

2d15a1783fc33329d489605782b69fc53e8958d9
SHA256

519ff9a3b1fcdf4990b757384c234bb1254f26b54fe4eafaada95ffd867e21ac
SHA512

4eb964d11cff6f9585444262d7b7612df1204cff842fd0b2e82ca68dc53bd34576beb05dc9564b157ed177db407c7d1a4ef6ef3f0b41d5a055e12314321f00ce
SSDEEP

49152:8JGfhRFNMttjjWgX/75Z2Q7zecijX83cWTig06TFZiUAO+rI:8JGfszjWEdFzecizxWlZi9

Score

6^/10

adware stealer

Malware Config

Signatures

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\{cb56c2d9-0ee7-00bb-f1e8-c0bd2cabf953}	regsvr32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{cb56c2d9-0ee7-00bb-f1e8-c0bd2cabf953}\NoExplorer = "0"	regsvr32.exe

Maps connected drives based on registry 3 TTPs 3 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum	regsvr32.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\Count	regsvr32.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	regsvr32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{cb56c2d9-0ee7-00bb-f1e8-c0bd2cabf953}\InProcServer32\ThreadingModel = "Apartment"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{cb56c2d9-0ee7-00bb-f1e8-c0bd2cabf953}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{cb56c2d9-0ee7-00bb-f1e8-c0bd2cabf953}\ = "adsflow"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{cb56c2d9-0ee7-00bb-f1e8-c0bd2cabf953}\InProcServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{cb56c2d9-0ee7-00bb-f1e8-c0bd2cabf953}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\$PROGRAMFILES\\Mozilla Firefox\\$R1.dll"	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2968 wrote to memory of 2348	2968	regsvr32.exe	28
PID 2968 wrote to memory of 2348	2968	regsvr32.exe	28
PID 2968 wrote to memory of 2348	2968	regsvr32.exe	28
PID 2968 wrote to memory of 2348	2968	regsvr32.exe	28
PID 2968 wrote to memory of 2348	2968	regsvr32.exe	28
PID 2968 wrote to memory of 2348	2968	regsvr32.exe	28
PID 2968 wrote to memory of 2348	2968	regsvr32.exe	28

C:\Windows\system32\regsvr32.exe
regsvr32 /s "C:\Users\Admin\AppData\Local\Temp\$PROGRAMFILES\Mozilla Firefox\$R1.dll"
1⤵
- Suspicious use of WriteProcessMemory
PID:2968
- C:\Windows\SysWOW64\regsvr32.exe
  /s "C:\Users\Admin\AppData\Local\Temp\$PROGRAMFILES\Mozilla Firefox\$R1.dll"
  2⤵
  - Installs/modifies Browser Helper Object
  - Maps connected drives based on registry
  - Modifies registry class
  PID:2348

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

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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