6c22662a21bcaf8b65b581982cd5e6f91448a01d6cf94ff13d3ba4b87ae97d25

Analysis

max time kernel
152s
max time network
68s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
31-05-2023 18:19

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General

Target

Windows/Boot/DVD/EFI/en-US/efisys.bin
Size

1.4MB
MD5

11a1dbc6ca6863bc889114636d979fb5
SHA1

d45c4643e5ed3f8922c0ed99f31194e4b9e4612e
SHA256

8945d88d65809d2555c50c40a736b6f32added33d09df2d18ca0e40098b52e03
SHA512

4dd402389301986332d4419717d92f5b5417a3f5e0373ef4cac75253a58abf00e6c7d9e9d6b7844a4f58b1925fe9827b0f11cd460313a79f8d41f48f99af2334
SSDEEP

24576:jYDb1GLdr7ecbtUgPUX53cizXxgnaSJ0jPmRoIdQ:Zldb2CU2ijdLmu

Score

3^/10

Malware Config

Signatures

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies registry class 9 IoCs

Processes:

rundll32.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_CLASSES\.bin\ = "bin_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_CLASSES\bin_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_CLASSES\bin_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_CLASSES\.bin	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_CLASSES\bin_auto_file\shell	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_CLASSES\bin_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_CLASSES\bin_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_CLASSES\bin_auto_file\	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

AcroRd32.exe

pid process

1360 AcroRd32.exe
1360 AcroRd32.exe
1360 AcroRd32.exe

pid	process
1360	AcroRd32.exe
1360	AcroRd32.exe
1360	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 2040 wrote to memory of 1708	2040	cmd.exe	rundll32.exe
PID 2040 wrote to memory of 1708	2040	cmd.exe	rundll32.exe
PID 2040 wrote to memory of 1708	2040	cmd.exe	rundll32.exe
PID 1708 wrote to memory of 1360	1708	rundll32.exe	AcroRd32.exe
PID 1708 wrote to memory of 1360	1708	rundll32.exe	AcroRd32.exe
PID 1708 wrote to memory of 1360	1708	rundll32.exe	AcroRd32.exe
PID 1708 wrote to memory of 1360	1708	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Windows\Boot\DVD\EFI\en-US\efisys.bin
1⤵
- Suspicious use of WriteProcessMemory
PID:2040

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\Windows\Boot\DVD\EFI\en-US\efisys.bin
2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1708

C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
"C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Local\Temp\Windows\Boot\DVD\EFI\en-US\efisys.bin"
3⤵
- Suspicious use of SetWindowsHookEx
PID:1360

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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