c0ad73aea5ef4092736db44c301ddd6b2f4caa7ef051d67c9a4087eebca2db59

Analysis

max time kernel
121s
max time network
123s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
03/05/2024, 00:42

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General

Target
Release/Compilers/tinycc/include/io.h
Size 12KB
Sample240503-a2rnmscg34
SHA256 5da97c850e8e2ab608c42947a33411f556f6d75b8264e1e5cf29ca7ba7b96256
MD5 4ac0744ef16453febed8de4242997946
SHA1 b092c9006de0a8dbe7f0ff568b6caafb00b4c90a
SHA512 1ec9947c6fe0160954f3922d6990863865d274874c31355f0838ccbb1bbf6650a9a3f0d3590537a189afbf80e33cde5393260fdd5f3ea5a736a066cdcc5ff815
SSDEEP 384:Y8Bx8BjP8BJPKf37Rw8z/hI9B3mpv6O3O8iONUO5OG0xLIJ8SNgVSAMczPO8cONU:r02oxz7vX+8fNxIG0S8SNgVxz28ZNU
MD5 SHA1 SHA512 SSDEEP

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 12 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\.h	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\h_auto_file\shell\edit\command\ = "%SystemRoot%\\system32\\NOTEPAD.EXE %1"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\h_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\h_auto_file\	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\.h\ = "h_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\h_auto_file\shell\edit	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\h_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\h_auto_file\shell\edit\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\h_auto_file\shell\open	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\h_auto_file\shell\open\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_Classes\Local Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000_CLASSES\h_auto_file\shell\open\command\ = "%SystemRoot%\\system32\\NOTEPAD.EXE %1"	rundll32.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
2812	NOTEPAD.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2852 wrote to memory of 3024	2852	cmd.exe	29
PID 2852 wrote to memory of 3024	2852	cmd.exe	29
PID 2852 wrote to memory of 3024	2852	cmd.exe	29
PID 3024 wrote to memory of 2812	3024	rundll32.exe	30
PID 3024 wrote to memory of 2812	3024	rundll32.exe	30
PID 3024 wrote to memory of 2812	3024	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Release\Compilers\tinycc\include\io.h
1⤵
- Suspicious use of WriteProcessMemory
PID:2852
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\Release\Compilers\tinycc\include\io.h
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:3024
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\Release\Compilers\tinycc\include\io.h
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:2812

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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