6c22662a21bcaf8b65b581982cd5e6f91448a01d6cf94ff13d3ba4b87ae97d25

Analysis

max time kernel
156s
max time network
117s
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_noprompt.bin
Size

1.4MB
MD5

d0f30c2942960dfce0e90efb382385cf
SHA1

23e897410c65b06cdfa4a166bc8929d8ee796243
SHA256

9efc728c4724ade5ee477f4c73b97bd1bc3fe05a2bedb1f435f908d5c7ba908e
SHA512

b6cb5b6e6bb88f59ce3a03fcdeeb5f1fae68b09b1adbf6780d4ed17b57b987554ce621fd5f91ba4e06859572740bdb1c681e755d34d1899eae35266227614863
SSDEEP

24576:lRjbjmGfDjGbQD9u3G1WZGsR1BTl6XlzPmdoIK:uMeQZcG5sRT+lbm6Z

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
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000_CLASSES\bin_auto_file\shell\Read	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000_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-1-5-21-1914912747-3343861975-731272777-1000_CLASSES\.bin	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000_CLASSES\.bin\ = "bin_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000_CLASSES\bin_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000_CLASSES\bin_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000_CLASSES\bin_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000_CLASSES\bin_auto_file\	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

AcroRd32.exe

pid process

1052 AcroRd32.exe
1052 AcroRd32.exe

pid	process
1052	AcroRd32.exe
1052	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 1056 wrote to memory of 1672	1056	cmd.exe	rundll32.exe
PID 1056 wrote to memory of 1672	1056	cmd.exe	rundll32.exe
PID 1056 wrote to memory of 1672	1056	cmd.exe	rundll32.exe
PID 1672 wrote to memory of 1052	1672	rundll32.exe	AcroRd32.exe
PID 1672 wrote to memory of 1052	1672	rundll32.exe	AcroRd32.exe
PID 1672 wrote to memory of 1052	1672	rundll32.exe	AcroRd32.exe
PID 1672 wrote to memory of 1052	1672	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Windows\Boot\DVD\EFI\en-US\efisys_noprompt.bin
1⤵
- Suspicious use of WriteProcessMemory
PID:1056

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_noprompt.bin
2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1672

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_noprompt.bin"
3⤵
- Suspicious use of SetWindowsHookEx
PID:1052

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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