ca335fb2ca46c19a6c56c843ef622782b5e65169ae512918dc425acad023cd38

Analysis

max time kernel
161s
max time network
175s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
19-04-2024 05:15

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General

Target

ca335fb2ca46c19a6c56c843ef622782b5e65169ae512918dc425acad023cd38.dll
Size

240KB
MD5

dbae6edd483722415063188a27f4c1fd
SHA1

6018b3c7b290925c9e2d146ab39bfddca02ee7b5
SHA256

ca335fb2ca46c19a6c56c843ef622782b5e65169ae512918dc425acad023cd38
SHA512

8c9034cc4c244377a98e75fca5af018e33d9a092c96af9b94108f472f7433331a8898e96fb79169edfec9a1338e6592c404f74affe5b25099d3a5c724bd23aba
SSDEEP

6144:65r3lV6n42+3WSKhxD8RVo2rcaGKNqAwyotp2G:6C+3xWDY9IpKNTwyo/

Score

8^/10

bootkit persistence spyware stealer

Malware Config

Signatures

Blocklisted process makes network request 8 IoCs

Processes:

rundll32.exe

flow	pid	process
25	4900	rundll32.exe
42	4900	rundll32.exe
43	4900	rundll32.exe
44	4900	rundll32.exe
45	4900	rundll32.exe
46	4900	rundll32.exe
57	4900	rundll32.exe
61	4900	rundll32.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
T1552.001

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

rundll32.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1230272463-3683322193-511842230-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Platform = "C:\\Windows\\SysWOW64\\rundll32.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\ca335fb2ca46c19a6c56c843ef622782b5e65169ae512918dc425acad023cd38.dll\",Erase"	rundll32.exe

Enumerates connected drives 3 TTPs 2 IoCs
Attempts to read the root path of hard drives other than the default C: drive.

Query Registry
T1012

Peripheral Device Discovery
T1120

System Information Discovery
T1082

Processes:

rundll32.exe

description ioc process

File opened (read-only) \??\a: rundll32.exe
File opened (read-only) \??\b: rundll32.exe
Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
bootkit persistence

Bootkit
T1542.003

Processes:

rundll32.exe

description ioc process

File opened for modification \??\PHYSICALDRIVE0 rundll32.exe

description	ioc	process
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe

description	ioc	process
File opened for modification	\??\PHYSICALDRIVE0	rundll32.exe

Checks processor information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

rundll32.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

rundll32.exe

pid process

4900 rundll32.exe
4900 rundll32.exe
4900 rundll32.exe
4900 rundll32.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

rundll32.exe

description pid process

Token: SeDebugPrivilege 4900 rundll32.exe

pid	process
4900	rundll32.exe
4900	rundll32.exe
4900	rundll32.exe
4900	rundll32.exe

description	pid	process
Token: SeDebugPrivilege	4900	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 3196 wrote to memory of 4900	3196	rundll32.exe	rundll32.exe
PID 3196 wrote to memory of 4900	3196	rundll32.exe	rundll32.exe
PID 3196 wrote to memory of 4900	3196	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ca335fb2ca46c19a6c56c843ef622782b5e65169ae512918dc425acad023cd38.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3196

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ca335fb2ca46c19a6c56c843ef622782b5e65169ae512918dc425acad023cd38.dll,#1
2⤵
- Blocklisted process makes network request
- Adds Run key to start application
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4900

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

memory/4900-0-0x0000000010000000-0x000000001008E000-memory.dmp

Filesize
568KB

Download
memory/4900-1-0x0000000010000000-0x000000001008E000-memory.dmp

Filesize
568KB

Download
memory/4900-4-0x0000000010000000-0x000000001008E000-memory.dmp

Filesize
568KB

Download