7974252b4b71bf7d723292f95b8d07e5044efd45225e53c8d1b205f6ccd0bc8b

Analysis

max time kernel
150s
max time network
51s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
29-11-2022 20:14

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General

Target

attachment-1.tnef
Size

2KB
MD5

9fb6c061f91fa05246af6af63e588e38
SHA1

31d01e74a4346149b66685793311038d4050d695
SHA256

1924d39d08512972c34ca46b76ab5b5e1349e5783670b1c4fce32e06998f6705
SHA512

e0e269f85d481ea27aad204f7f1224d22e967c28e5f52e81cd3a924a8a3eb0a68777b22bd450d07cfaf99db29f3dd2e02f2334ce06d61570d99379159528e32c

Score

3^/10

Malware Config

Signatures

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Modifies registry class 10 IoCs

Processes:

rundll32.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000_CLASSES\tnef_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000_CLASSES\.tnef	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000_CLASSES\tnef_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000_CLASSES\tnef_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000_CLASSES\.tnef\ = "tnef_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000_CLASSES\tnef_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000_CLASSES\tnef_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000_CLASSES\tnef_auto_file\shell\Read\command	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

AcroRd32.exe

pid process

1896 AcroRd32.exe
1896 AcroRd32.exe
1896 AcroRd32.exe

pid	process
1896	AcroRd32.exe
1896	AcroRd32.exe
1896	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 1416 wrote to memory of 684	1416	cmd.exe	rundll32.exe
PID 1416 wrote to memory of 684	1416	cmd.exe	rundll32.exe
PID 1416 wrote to memory of 684	1416	cmd.exe	rundll32.exe
PID 684 wrote to memory of 1896	684	rundll32.exe	AcroRd32.exe
PID 684 wrote to memory of 1896	684	rundll32.exe	AcroRd32.exe
PID 684 wrote to memory of 1896	684	rundll32.exe	AcroRd32.exe
PID 684 wrote to memory of 1896	684	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\attachment-1.tnef
1⤵
- Suspicious use of WriteProcessMemory
PID:1416

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\attachment-1.tnef
2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:684

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\attachment-1.tnef"
3⤵
- Suspicious use of SetWindowsHookEx
PID:1896

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/684-76-0x0000000000000000-mapping.dmp

Download
memory/1416-54-0x000007FEFB9E1000-0x000007FEFB9E3000-memory.dmp

Filesize
8KB

Download
memory/1896-81-0x0000000000000000-mapping.dmp

Download
memory/1896-82-0x0000000074DC1000-0x0000000074DC3000-memory.dmp

Filesize
8KB

Download