be8c72e77bd4a9453a3ffbf89383ca1487c650c3eb006b8c58e5e6490089b38c

Analysis

max time kernel
32s
max time network
29s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
23-04-2023 15:14

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General

Target

BlitzedPrem.7z
Size

5.3MB
MD5

7c73dbaf4675062445763268ae30fd50
SHA1

6a26872339fc0cecee551c81317cd40fcfb30cbd
SHA256

be8c72e77bd4a9453a3ffbf89383ca1487c650c3eb006b8c58e5e6490089b38c
SHA512

93ac3e0594c1ecd17579e9dd52ecdbd47c68fdde7a9a2a362f82e3c13f4eb2aa42ed8072de4b21eece9c75a460ba8b2fb79d66acd55b3ab78e3b12ff91efb653
SSDEEP

98304:jbDchxaZZXeYfaXv/zEvWNk9Od2/pfFz2zy24/SU1xyhuoYIDhMKJYPg:vDoaZZOYe/4We9o2952OHDwNJdJX

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

Processes:

rundll32.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_CLASSES\7z_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_CLASSES\7z_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_CLASSES\7z_auto_file\shell\edit	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_CLASSES\7z_auto_file\shell\edit\command\ = "%SystemRoot%\\system32\\NOTEPAD.EXE %1"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_CLASSES\7z_auto_file\shell\open\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_CLASSES\7z_auto_file\shell\open\command\ = "%SystemRoot%\\system32\\NOTEPAD.EXE %1"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_CLASSES\.7z	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_CLASSES\.7z\ = "7z_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_CLASSES\7z_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_CLASSES\7z_auto_file\shell\edit\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_CLASSES\7z_auto_file\shell\open	rundll32.exe

Opens file in notepad (likely ransom note) 1 IoCs
ransomware

Processes:

NOTEPAD.EXE

pid process

112 NOTEPAD.EXE
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

rundll32.exe

pid process

1540 rundll32.exe

pid	process
112	NOTEPAD.EXE

pid	process
1540	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

cmd.exerundll32.exe

description	pid	process	target process
PID 1968 wrote to memory of 1540	1968	cmd.exe	rundll32.exe
PID 1968 wrote to memory of 1540	1968	cmd.exe	rundll32.exe
PID 1968 wrote to memory of 1540	1968	cmd.exe	rundll32.exe
PID 1540 wrote to memory of 112	1540	rundll32.exe	NOTEPAD.EXE
PID 1540 wrote to memory of 112	1540	rundll32.exe	NOTEPAD.EXE
PID 1540 wrote to memory of 112	1540	rundll32.exe	NOTEPAD.EXE

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\BlitzedPrem.7z
1⤵
- Suspicious use of WriteProcessMemory
PID:1968

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\BlitzedPrem.7z
2⤵
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:1540

C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\BlitzedPrem.7z
3⤵
- Opens file in notepad (likely ransom note)
PID:112

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

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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