51b3773145652b5d559396a08e1282a3a1d92d4df473f774d61791386fca0598

Resubmissions

22-11-2024 22:54

241122-2vh7gaxmfl 10

22-11-2024 03:27

241122-dzqkcatmht 10

22-11-2024 03:16

241122-dsgc4atlgs 10

Analysis

max time kernel
144s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
22-11-2024 22:54

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General

Target

bfb8f7f6cbe24330a310e5c7cbe99ed4_api-ms-win-system-wer-l1-1-0.dll
Size

440KB
MD5

bfb8f7f6cbe24330a310e5c7cbe99ed4
SHA1

cfb97a66c90bff92b5d72eb9e81b2e9d8013b66d
SHA256

a4e9c151a50595b59e787dd3b361ac53d02dd7f212d6b22639dc01776c886d05
SHA512

f8a4c341b50a37b15c8a11979d8b0ce82c33fb4fd6a9749b4c561db84627e850f8fc23778f78d085b218ea40cdecf05864e68b73f5cc606d7ef30a0454c09550
SSDEEP

6144:muStbEUJp4qjMO3QZW+PeT9JiPZCL/qrS9spyM:dStbJaE+NCLEnp

Score

8^/10

discovery spyware stealer

Malware Config

Signatures

Blocklisted process makes network request 2 IoCs

Processes:

rundll32.exe

flow pid process

22 3836 rundll32.exe
41 3836 rundll32.exe
Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

flow	pid	process
22	3836	rundll32.exe
41	3836	rundll32.exe

Enumerates connected drives 3 TTPs 22 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)	\??\X:	rundll32.exe
File opened (read-only)	\??\M:	rundll32.exe
File opened (read-only)	\??\I:	rundll32.exe
File opened (read-only)	\??\G:	rundll32.exe
File opened (read-only)	\??\E:	rundll32.exe
File opened (read-only)	\??\Y:	rundll32.exe
File opened (read-only)	\??\V:	rundll32.exe
File opened (read-only)	\??\P:	rundll32.exe
File opened (read-only)	\??\K:	rundll32.exe
File opened (read-only)	\??\B:	rundll32.exe
File opened (read-only)	\??\Z:	rundll32.exe
File opened (read-only)	\??\W:	rundll32.exe
File opened (read-only)	\??\U:	rundll32.exe
File opened (read-only)	\??\R:	rundll32.exe
File opened (read-only)	\??\O:	rundll32.exe
File opened (read-only)	\??\H:	rundll32.exe
File opened (read-only)	\??\T:	rundll32.exe
File opened (read-only)	\??\S:	rundll32.exe
File opened (read-only)	\??\Q:	rundll32.exe
File opened (read-only)	\??\N:	rundll32.exe
File opened (read-only)	\??\L:	rundll32.exe
File opened (read-only)	\??\J:	rundll32.exe

Drops file in Program Files directory 3 IoCs

Processes:

rundll32.exerundll32.exe

description	ioc	process
File created	C:\PROGRA~3\RUNDLL32.EXE-1192.txt	rundll32.exe
File created	C:\PROGRA~3\RUNDLL32.EXE-3836.txt	rundll32.exe
File created	C:\PROGRA~3\3EB10C382B31.dat	rundll32.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

rundll32.exerundll32.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Checks processor information in registry 2 TTPs 6 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

rundll32.exerundll32.exe

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

Enumerates system info in registry 2 TTPs 6 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

rundll32.exerundll32.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\BIOSVendor	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\BIOSVendor	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 4220 wrote to memory of 1192	4220	rundll32.exe	rundll32.exe
PID 4220 wrote to memory of 1192	4220	rundll32.exe	rundll32.exe
PID 4220 wrote to memory of 1192	4220	rundll32.exe	rundll32.exe
PID 1192 wrote to memory of 3836	1192	rundll32.exe	rundll32.exe
PID 1192 wrote to memory of 3836	1192	rundll32.exe	rundll32.exe
PID 1192 wrote to memory of 3836	1192	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\bfb8f7f6cbe24330a310e5c7cbe99ed4_api-ms-win-system-wer-l1-1-0.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4220
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\bfb8f7f6cbe24330a310e5c7cbe99ed4_api-ms-win-system-wer-l1-1-0.dll,#1
  2⤵
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of WriteProcessMemory
  PID:1192
- - C:\Windows\SysWOW64\rundll32.exe
    C:\Windows\\system32\rundll32.exe C:\Users\Admin\AppData\Local\Temp\bfb8f7f6cbe24330a310e5c7cbe99ed4_api-ms-win-system-wer-l1-1-0.dll,AccessToken
    3⤵
    - Blocklisted process makes network request
    - Enumerates connected drives
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Checks processor information in registry
    - Enumerates system info in registry
    PID:3836

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1192-0-0x0000000000810000-0x0000000000811000-memory.dmp

Filesize
4KB

Download
memory/1192-1-0x000000000B000000-0x000000000B06F000-memory.dmp

Filesize
444KB

Download
memory/3836-14-0x000000000B000000-0x000000000B06F000-memory.dmp

Filesize
444KB

Download
memory/3836-15-0x000000000B000000-0x000000000B06F000-memory.dmp

Filesize
444KB

Download
memory/3836-16-0x000000000B000000-0x000000000B06F000-memory.dmp

Filesize
444KB

Download