3041536c2a8e1a90ee11ba958e9ee764404a801fda04af11d256475064f752a6

Analysis

max time kernel
88s
max time network
33s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
14-12-2022 23:03

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General

Target

RRFB17.vhd
Size

2.0MB
MD5

9550997039bcbbbfb97efcb802b53a93
SHA1

9db73320291c262c35c944011dd6c9b1ee9a4c0b
SHA256

3041536c2a8e1a90ee11ba958e9ee764404a801fda04af11d256475064f752a6
SHA512

277fc3df93591324dd6796d586f6d9a74376f68ae9369982b6777e2efe7dad5b7e066600b9243dae9ef89ac2f0a31ccf21e8d0d7f9a854e99f0d3dbc43fcc3fe
SSDEEP

24576:ldBrbfL6VHOe+lhMjcxy9tnYu8UQw8Md:ldBXT6FOe+l+j4Yx8UQw8M

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 2 IoCs

Processes:

rundll32.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

rundll32.exe

pid process

752 rundll32.exe

pid	process
752	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

cmd.exe

description	pid	process	target process
PID 1744 wrote to memory of 752	1744	cmd.exe	rundll32.exe
PID 1744 wrote to memory of 752	1744	cmd.exe	rundll32.exe
PID 1744 wrote to memory of 752	1744	cmd.exe	rundll32.exe

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\RRFB17.vhd
1⤵
- Suspicious use of WriteProcessMemory
PID:1744

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RRFB17.vhd
2⤵
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
PID:752

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/752-76-0x0000000000000000-mapping.dmp

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memory/1744-54-0x000007FEFC071000-0x000007FEFC073000-memory.dmp

Filesize
8KB

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