c0ad73aea5ef4092736db44c301ddd6b2f4caa7ef051d67c9a4087eebca2db59

Analysis

max time kernel
118s
max time network
120s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
03/05/2024, 00:42

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General

Target
Release/Compilers/tinycc/include/dos.h
Size 1KB
Sample240503-a2rnmscg34
SHA256 3afea4ae85c68987fe59f40592ac5ea3ef1049b4fb72612bb185358d628e2dec
MD5 3b6fbc94238df0fd001b04d55bc899db
SHA1 231e18ce6a5488b2353fb9ef052fd6677c2cf555
SHA512 28ba3ed6cc9511f17798822fa81a2d16da17ca4af9da64f3edc9170fbb883801bf07390214c54b58a32251e6a1c3bb359cb76e892ddb77fbf8c1bf3985e13e5e
MD5 SHA1 SHA512

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-1-5-21-481678230-3773327859-3495911762-1000_CLASSES\h_auto_file\shell\open	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000_CLASSES\h_auto_file\shell\open\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000_CLASSES\h_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000_CLASSES\.h	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000_CLASSES\h_auto_file\shell\edit\command\ = "%SystemRoot%\\system32\\NOTEPAD.EXE %1"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000_CLASSES\h_auto_file\shell\edit	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000_CLASSES\h_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000_CLASSES\h_auto_file\shell\edit\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000_CLASSES\h_auto_file\shell\open\command\ = "%SystemRoot%\\system32\\NOTEPAD.EXE %1"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000_Classes\Local Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000_CLASSES\h_auto_file\	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000_CLASSES\.h\ = "h_auto_file"	rundll32.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
2508	NOTEPAD.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1936 wrote to memory of 2768	1936	cmd.exe	29
PID 1936 wrote to memory of 2768	1936	cmd.exe	29
PID 1936 wrote to memory of 2768	1936	cmd.exe	29
PID 2768 wrote to memory of 2508	2768	rundll32.exe	30
PID 2768 wrote to memory of 2508	2768	rundll32.exe	30
PID 2768 wrote to memory of 2508	2768	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Release\Compilers\tinycc\include\dos.h
1⤵
- Suspicious use of WriteProcessMemory
PID:1936
- 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\dos.h
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2768
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\Release\Compilers\tinycc\include\dos.h
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:2508

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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Downloads