31a1553ca7cb23f86e5e841596311e489c7c5285b4ac49d4fe655a918f2a5723

Analysis

max time kernel
16s
max time network
17s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
23-08-2024 14:08

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General

Target

$PROGRAMFILES/Mozilla Firefox/$R1.dll
Size

1.9MB
MD5

c57bfc1c24b16df571bf0a90124aabf0
SHA1

32ab3c366bc32dc3ddc88c42eea70a4739f2e3c4
SHA256

8a1cc850e65e92b960f33c999fcd2452f08899a8bf94f0f51e6cf03775cb403e
SHA512

93e9918561235b22c5b276ba7454b8e7f3f09f35742d5766d7a81db20ff0f62e562a989eab2e32a517b12b4fb344436bfb97e2d7f6d0d950950bfd2d497edf1b
SSDEEP

49152:WnRVFbNJaEFnzpWNKWkjPw9JlgZSWd5EqoD4TT5X2fWMK:QRPRzUwwp0SS/XX2e

Score

6^/10

adware discovery 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\{36a38bb6-bb5f-6c3d-465e-3f34eb90d14a}	regsvr32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{36a38bb6-bb5f-6c3d-465e-3f34eb90d14a}\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

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{36a38bb6-bb5f-6c3d-465e-3f34eb90d14a}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{36a38bb6-bb5f-6c3d-465e-3f34eb90d14a}\ = "sleekseek"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{36a38bb6-bb5f-6c3d-465e-3f34eb90d14a}\InProcServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{36a38bb6-bb5f-6c3d-465e-3f34eb90d14a}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\$PROGRAMFILES\\Mozilla Firefox\\$R1.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{36a38bb6-bb5f-6c3d-465e-3f34eb90d14a}\InProcServer32\ThreadingModel = "Apartment"	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2072 wrote to memory of 2472	2072	regsvr32.exe	29
PID 2072 wrote to memory of 2472	2072	regsvr32.exe	29
PID 2072 wrote to memory of 2472	2072	regsvr32.exe	29
PID 2072 wrote to memory of 2472	2072	regsvr32.exe	29
PID 2072 wrote to memory of 2472	2072	regsvr32.exe	29
PID 2072 wrote to memory of 2472	2072	regsvr32.exe	29
PID 2072 wrote to memory of 2472	2072	regsvr32.exe	29

C:\Windows\system32\regsvr32.exe
regsvr32 /s "C:\Users\Admin\AppData\Local\Temp\$PROGRAMFILES\Mozilla Firefox\$R1.dll"
1⤵
- Suspicious use of WriteProcessMemory
PID:2072
- 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
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  PID:2472

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

System Location Discovery

T1614

System Language Discovery

T1614.001

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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