c0ad73aea5ef4092736db44c301ddd6b2f4caa7ef051d67c9a4087eebca2db59

Analysis

max time kernel
120s
max time network
121s
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/dirent.h
Size 3KB
Sample240503-a2rnmscg34
SHA256 88c1f767fdcd6d51b991ee3234792da48c8576f5f8816f17a42344f9c8bbb1c1
MD5 afbe32ee6ded8cbad33d6fe3fbbf077d
SHA1 a7f0d3edee5f49e127575eb25e64e2747108e7c3
SHA512 f655a40f8c87a0cb43a34ae47612d5cef2cf7814fd2ae9ce1c8566f97f45e91470364bd87e8c12861cce44fb8cca54717546baacc6ccbdace51d0d15206304dd
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-1-5-21-2721934792-624042501-2768869379-1000_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
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\ = "h_auto_file"	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
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
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
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
2708	NOTEPAD.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1792 wrote to memory of 2672	1792	cmd.exe	29
PID 1792 wrote to memory of 2672	1792	cmd.exe	29
PID 1792 wrote to memory of 2672	1792	cmd.exe	29
PID 2672 wrote to memory of 2708	2672	rundll32.exe	30
PID 2672 wrote to memory of 2708	2672	rundll32.exe	30
PID 2672 wrote to memory of 2708	2672	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Release\Compilers\tinycc\include\dirent.h
1⤵
- Suspicious use of WriteProcessMemory
PID:1792
- 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\dirent.h
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2672
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\Release\Compilers\tinycc\include\dirent.h
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:2708

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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