9e355ebbac6b249350549565790d69a5e08d0a1b89ca4045d83fe27726dcee68

Analysis

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

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
15/04/2024, 04:18

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General

Target
f04a2e3a113ee4dcb43f1b8f54130fce_JaffaCakes118.dll
Size 158KB
Sample240415-exa8baed22
SHA256 9e355ebbac6b249350549565790d69a5e08d0a1b89ca4045d83fe27726dcee68
MD5 f04a2e3a113ee4dcb43f1b8f54130fce
SHA1 df172fb259cf74b98a4507e708223a6e1b4d5f36
SHA512 26cbe42c86d41e09f8147c4538351f91d00137d3f0583d903f9979d322be97f976bf725c5263eca9b83348ddc070dfc6111e5e4cde8fac856ad58484ca1db562
SSDEEP 3072:RUo1ije7HSjSMOt332bbrMbvT0q8O1cZPzQ7IXMBc+AMP+QfQEhxFyVU7fDCrlNi:Cj2HSnQ34wvP6bQ7yMP+DE827fYlg
MD5 SHA1 SHA512 SSDEEP

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\Wow6432Node\CLSID\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}	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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.key\ = "regfile"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F9BA1AA9-CAD4-4C14-BDE6-922DFF5F6F38}\wversion = "3.4.7"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}\ = "WebHelper Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f04a2e3a113ee4dcb43f1b8f54130fce_JaffaCakes118.dll"	regsvr32.exe
Key created	\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

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1932 wrote to memory of 2492	1932	regsvr32.exe	28
PID 1932 wrote to memory of 2492	1932	regsvr32.exe	28
PID 1932 wrote to memory of 2492	1932	regsvr32.exe	28
PID 1932 wrote to memory of 2492	1932	regsvr32.exe	28
PID 1932 wrote to memory of 2492	1932	regsvr32.exe	28
PID 1932 wrote to memory of 2492	1932	regsvr32.exe	28
PID 1932 wrote to memory of 2492	1932	regsvr32.exe	28

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f04a2e3a113ee4dcb43f1b8f54130fce_JaffaCakes118.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:1932
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\f04a2e3a113ee4dcb43f1b8f54130fce_JaffaCakes118.dll
  2⤵
  - Installs/modifies Browser Helper Object
  - Writes to the Master Boot Record (MBR)
  - Modifies registry class
  PID:2492

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/2492-0-0x0000000010000000-0x0000000010035000-memory.dmp

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memory/2492-1-0x00000000001A0000-0x00000000001D0000-memory.dmp

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memory/2492-2-0x0000000000170000-0x0000000000173000-memory.dmp

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Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads