42f47cb41507151ec2db8422662adfd8d234533874740b6680ebd06f4f359403

Analysis

max time kernel
118s
max time network
118s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
03-07-2024 03:33

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General

Target

PySilon-malware-3.7.5/builder.py
Size

30KB
MD5

f011ab09f5e640bbf339d9edd93e2739
SHA1

cfe055600b42ed2eb3b77c3f9632301cd4c3e6dd
SHA256

443bd85e3bf8d6a5880400025047933bf58e7cccdb9f1c7585fc6932113f2fdb
SHA512

bdae087b6fa1a781805fa8a1a2b248e23226261bb4be179dcf1b762f0a1241f7d697797434f23e0820ab39b4c6156c9b4674383cdfb251ce346351132b6ee3b3
SSDEEP

768:d2PufIVSZvFWL2sthHqxFgYP0kqhvqeju:d22QEZvMLp/HqxFgYP0kqhvqei

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-1-5-21-1298544033-3225604241-2703760938-1000_Classes\Local Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\py_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\py_auto_file\shell\Read	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\py_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\py_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\.py	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\.py\ = "py_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\py_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\py_auto_file\shell\Read\command	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

AcroRd32.exe

pid process

2724 AcroRd32.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

AcroRd32.exe

pid process

2724 AcroRd32.exe
2724 AcroRd32.exe

pid	process
2724	AcroRd32.exe

pid	process
2724	AcroRd32.exe
2724	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 2344 wrote to memory of 2376	2344	cmd.exe	rundll32.exe
PID 2344 wrote to memory of 2376	2344	cmd.exe	rundll32.exe
PID 2344 wrote to memory of 2376	2344	cmd.exe	rundll32.exe
PID 2376 wrote to memory of 2724	2376	rundll32.exe	AcroRd32.exe
PID 2376 wrote to memory of 2724	2376	rundll32.exe	AcroRd32.exe
PID 2376 wrote to memory of 2724	2376	rundll32.exe	AcroRd32.exe
PID 2376 wrote to memory of 2724	2376	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\PySilon-malware-3.7.5\builder.py
1⤵
- Suspicious use of WriteProcessMemory
PID:2344

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\PySilon-malware-3.7.5\builder.py
2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2376

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\PySilon-malware-3.7.5\builder.py"
3⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:2724

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Adobe\Acrobat\9.0\SharedDataEvents
Filesize
3KB

MD5
fa0c79f96e732946f0401ac9b0ad6736

SHA1
4b0d672ec34f5d6633e391f9ae68703e7a7882c8

SHA256
8f5664bcf27daf8beb63bef0f1903e14c5f3f563bf85520edb597c986cbe7edd

SHA512
9b5d6d4f9b0a38cf039f13e4eabde515829968fb497534c291cbd457eb010e0764a3a279903fa4a402505a3708916f593778dcad09844a90228ea33a19c9d802

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