d1e70155a0fe1b2fa003997448f63f865fc9b3a6b3071ba91e09ce39fee7d5ba

Analysis

max time kernel
92s
max time network
138s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
18/04/2024, 23:27

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General

Target

tears.pyc
Size

61KB
MD5

3a4927909a671a6792926fa5f3841c4e
SHA1

28b517b8f63c2f2b5b4330724cb01a2abf1fe126
SHA256

037769954da26da1a8b9ca91982471d84382be3608628e74bd6633717af8c6eb
SHA512

7bdeb9fb0f11139d9a67c753a0ca322e857ce4f876ff2761aace2c5b2084d171d928493834387c2818dce12624c61f00fd849914c88f1112903222519c4713df
SSDEEP

768:iANZ4t/Wpuem0hVCZvxzsGW/fYkLUG66/wpjxdJ+Fb4DT:iOJmDdC8aFoT

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-1-5-21-259785868-298165991-4178590326-1000_Classes\Local Settings	OpenWith.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000_Classes\.pyc\ = "pyc_auto_file"	OpenWith.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000_Classes\pyc_auto_file\shell\edit\command\ = "%SystemRoot%\\system32\\NOTEPAD.EXE %1"	OpenWith.exe
Key created	\REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000_Classes\pyc_auto_file\shell\open	OpenWith.exe
Key created	\REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000_Classes\pyc_auto_file\shell\open\command	OpenWith.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000_Classes\pyc_auto_file\shell\open\command\ = "%SystemRoot%\\system32\\NOTEPAD.EXE %1"	OpenWith.exe
Key created	\REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000_Classes\Local Settings	cmd.exe
Key created	\REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000_Classes\.pyc	OpenWith.exe
Key created	\REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000_Classes\pyc_auto_file	OpenWith.exe
Key created	\REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000_Classes\pyc_auto_file\shell\edit	OpenWith.exe
Key created	\REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000_Classes\pyc_auto_file\shell	OpenWith.exe
Key created	\REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000_Classes\pyc_auto_file\shell\edit\command	OpenWith.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
4656	NOTEPAD.EXE

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3688	OpenWith.exe

Suspicious use of SetWindowsHookEx 9 IoCs

pid	Process
3688	OpenWith.exe
3688	OpenWith.exe
3688	OpenWith.exe
3688	OpenWith.exe
3688	OpenWith.exe
3688	OpenWith.exe
3688	OpenWith.exe
3688	OpenWith.exe
3688	OpenWith.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3688 wrote to memory of 4656	3688	OpenWith.exe	99
PID 3688 wrote to memory of 4656	3688	OpenWith.exe	99

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\tears.pyc
1⤵
- Modifies registry class
PID:5032

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
1⤵
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3688
- C:\Windows\system32\NOTEPAD.EXE
  "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\tears.pyc
  2⤵
  - Opens file in notepad (likely ransom note)
  PID:4656

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

Windows 7 deprecation

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