fbcf2757ae185b737e980435ffbdaeed4c722629a3d2a56b62bfafdcd44926ce

Analysis

max time kernel
141s
max time network
122s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
01-07-2024 04:54

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General

Target

wrapper.dll
Size

655KB
MD5

e1656d25f53820e291e60093f8e8bc41
SHA1

1407ef55c30de78b3b5f3e4a0042281ae9d55831
SHA256

367fda11631296caef0acad26cfed7d0934475eacb8349c1c209a575bf547cb8
SHA512

5407d8605a1405759f824e10bd748671d057eb477b8feed5772e62fa55f67df10ed643a7a7f90562db3782461291b61b452d679453888d065e0c8bafb8791e7f
SSDEEP

12288:3lTILolEZuvuVJBK9ONOkx2PAUv0vWPdcef6WKqC1bBTzBS0ncQ:3lTI9nhOkUIM0qNf6WKNJB1cQ

Score

9^/10

bootkit persistence upx

Malware Config

Signatures

UPX dump on OEP (original entry point) 1 IoCs

Processes:

resource yara_rule

behavioral19/memory/2616-2-0x0000000000C00000-0x0000000000DB9000-memory.dmp UPX
UPX packed file 1 IoCs
Detects executables packed with UPX/modified UPX open source packer.
upx

Processes:

resource yara_rule

behavioral19/memory/2616-2-0x0000000000C00000-0x0000000000DB9000-memory.dmp upx
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

Processes:

rundll32.exe

description ioc process

File opened for modification \??\PhysicalDrive0 rundll32.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

2392 2616 WerFault.exe rundll32.exe

resource	yara_rule
behavioral19/memory/2616-2-0x0000000000C00000-0x0000000000DB9000-memory.dmp	UPX

resource	yara_rule
behavioral19/memory/2616-2-0x0000000000C00000-0x0000000000DB9000-memory.dmp	upx

description	ioc	process
File opened for modification	\??\PhysicalDrive0	rundll32.exe

pid	pid_target	process	target process
2392	2616	WerFault.exe	rundll32.exe

Modifies registry class 3 IoCs

Processes:

rundll32.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.key\ = "regfile"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.key	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.key\	rundll32.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1260 wrote to memory of 2616	1260	rundll32.exe	rundll32.exe
PID 1260 wrote to memory of 2616	1260	rundll32.exe	rundll32.exe
PID 1260 wrote to memory of 2616	1260	rundll32.exe	rundll32.exe
PID 1260 wrote to memory of 2616	1260	rundll32.exe	rundll32.exe
PID 1260 wrote to memory of 2616	1260	rundll32.exe	rundll32.exe
PID 1260 wrote to memory of 2616	1260	rundll32.exe	rundll32.exe
PID 1260 wrote to memory of 2616	1260	rundll32.exe	rundll32.exe
PID 2616 wrote to memory of 2392	2616	rundll32.exe	WerFault.exe
PID 2616 wrote to memory of 2392	2616	rundll32.exe	WerFault.exe
PID 2616 wrote to memory of 2392	2616	rundll32.exe	WerFault.exe
PID 2616 wrote to memory of 2392	2616	rundll32.exe	WerFault.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\wrapper.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1260

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\wrapper.dll,#1
2⤵
- Writes to the Master Boot Record (MBR)
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2616

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2616 -s 280
3⤵
- Program crash
PID:2392

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

memory/2616-0-0x0000000010000000-0x000000001017D000-memory.dmp

Filesize
1.5MB

Download
memory/2616-1-0x0000000010000000-0x000000001017D000-memory.dmp

Filesize
1.5MB

Download
memory/2616-2-0x0000000000C00000-0x0000000000DB9000-memory.dmp

Filesize
1.7MB

Download
memory/2616-3-0x0000000010153000-0x0000000010154000-memory.dmp

Filesize
4KB

Download
memory/2616-4-0x0000000010000000-0x000000001017D000-memory.dmp

Filesize
1.5MB

Download
memory/2616-5-0x0000000010000000-0x000000001017D000-memory.dmp

Filesize
1.5MB

Download
memory/2616-6-0x0000000010000000-0x000000001017D000-memory.dmp

Filesize
1.5MB

Download
memory/2616-7-0x0000000010000000-0x000000001017D000-memory.dmp

Filesize
1.5MB

Download
memory/2616-8-0x0000000010000000-0x000000001017D000-memory.dmp

Filesize
1.5MB

Download
memory/2616-9-0x0000000010000000-0x000000001017D000-memory.dmp

Filesize
1.5MB

Download
memory/2616-12-0x0000000010153000-0x0000000010154000-memory.dmp

Filesize
4KB

Download