dd50c3ba967fa3422b1656f1f231fc4d3d8adfefce64d28c220b2bdc6a3319be

Analysis

max time kernel
67s
max time network
74s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
24-11-2022 18:10

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General

Target

Rensenware.exe
Size

96KB
MD5

60335edf459643a87168da8ed74c2b60
SHA1

61f3e01174a6557f9c0bfc89ae682d37a7e91e2e
SHA256

7bf5623f0a10dfa148a35bebd899b7758612f1693d2a9910f716cf15a921a76a
SHA512

b4e5e4d4f0b4a52243d6756c66b4fe6f4b39e64df7790072046e8a3dadad3a1be30b8689a1bab8257cc35cb4df652888ddf62b4e1fccb33e1bbf1f5416d73efb
SSDEEP

3072:kGXc7vE4k8sWJnmiWpJtCkGwJ1ED7qztG:RXD8sWBmiW0wX6Gx

Score

8^/10

ransomware spyware stealer

Malware Config

Signatures

Modifies extensions of user files 1 IoCs
Ransomware generally changes the extension on encrypted files.
ransomware

Processes:

Rensenware.exe

description ioc process

File created C:\Users\Admin\Pictures\PublishRemove.raw.RENSENWARE Rensenware.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

description	ioc	process
File created	C:\Users\Admin\Pictures\PublishRemove.raw.RENSENWARE	Rensenware.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

dw20.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dw20.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

dw20.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	dw20.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1484 EXCEL.EXE
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

dw20.exe

description pid process

Token: SeBackupPrivilege 2560 dw20.exe
Token: SeBackupPrivilege 2560 dw20.exe

description	pid	process
Token: SeBackupPrivilege	2560	dw20.exe
Token: SeBackupPrivilege	2560	dw20.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
1484	EXCEL.EXE
1484	EXCEL.EXE
1484	EXCEL.EXE
1484	EXCEL.EXE
1484	EXCEL.EXE
1484	EXCEL.EXE
1484	EXCEL.EXE
1484	EXCEL.EXE
1484	EXCEL.EXE
1484	EXCEL.EXE
1484	EXCEL.EXE
1484	EXCEL.EXE

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

Rensenware.exe

description	pid	process	target process
PID 1904 wrote to memory of 2560	1904	Rensenware.exe	dw20.exe
PID 1904 wrote to memory of 2560	1904	Rensenware.exe	dw20.exe

C:\Users\Admin\AppData\Local\Temp\Rensenware.exe
"C:\Users\Admin\AppData\Local\Temp\Rensenware.exe"
1⤵
- Modifies extensions of user files
- Suspicious use of WriteProcessMemory
PID:1904

C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe
dw20.exe -x -s 852
2⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
PID:2560

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\Desktop\RepairRead.bat" "
1⤵
PID:4644

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\Desktop\EnterSwitch.vbs"
1⤵
PID:3984

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\Desktop\SaveSearch.csv"
1⤵
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1484

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1484-134-0x00007FFD55B10000-0x00007FFD55B20000-memory.dmp

Filesize
64KB

Download
memory/1484-136-0x00007FFD55B10000-0x00007FFD55B20000-memory.dmp

Filesize
64KB

Download
memory/1484-137-0x00007FFD55B10000-0x00007FFD55B20000-memory.dmp

Filesize
64KB

Download
memory/1484-135-0x00007FFD55B10000-0x00007FFD55B20000-memory.dmp

Filesize
64KB

Download
memory/1484-138-0x00007FFD55B10000-0x00007FFD55B20000-memory.dmp

Filesize
64KB

Download
memory/1484-139-0x00007FFD531B0000-0x00007FFD531C0000-memory.dmp

Filesize
64KB

Download
memory/1484-140-0x00007FFD531B0000-0x00007FFD531C0000-memory.dmp

Filesize
64KB

Download
memory/1904-132-0x00007FFD76BD0000-0x00007FFD77606000-memory.dmp

Filesize
10.2MB

Download
memory/2560-133-0x0000000000000000-mapping.dmp

Download