100b85a1e544ca868a5498cc88fb5d5f5775fa70bb336c87efa07528bc313271

Analysis

max time kernel
211s
max time network
280s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
22-08-2024 07:09

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General

Target

MultiMC/libLauncher_rainbow.dll
Size

67KB
MD5

a01626f7ba38cf763ee9c4009b162093
SHA1

045af643a25cf790fef399f840fc2b712dc6dc12
SHA256

02a182c260743184c63fbcc1248dac87a870b8377534806522b489dd1e8d5cc1
SHA512

9d745f086e87fdb8ae66147224f5d62049bde6894648bfe3cc9cdec07adbaae98ab9eb20cf7a4ef27d9a249281d989e67c428d30c16d6022e5c62b80fd344497
SSDEEP

768:SEg24DKoyYH150BEexXfz2xGpsy/a2MaOtRd9P9mg8rO71:SFVD11ij11DM5hP7x

Score

3^/10

discovery

Malware Config

Signatures

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

8 3736 WerFault.exe rundll32.exe
System Location Discovery: System Language Discovery 1 TTPs 1 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.exe

description ioc process

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

pid	pid_target	process	target process
8	3736	WerFault.exe	rundll32.exe

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

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 4408 wrote to memory of 3736	4408	rundll32.exe	rundll32.exe
PID 4408 wrote to memory of 3736	4408	rundll32.exe	rundll32.exe
PID 4408 wrote to memory of 3736	4408	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\MultiMC\libLauncher_rainbow.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4408

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\MultiMC\libLauncher_rainbow.dll,#1
2⤵
- System Location Discovery: System Language Discovery
PID:3736

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3736 -s 620
3⤵
- Program crash
PID:8

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3736 -ip 3736
1⤵
PID:2836

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

memory/3736-1-0x0000000002420000-0x000000000294F000-memory.dmp

Filesize
5.2MB

Download
memory/3736-5-0x0000000002421000-0x00000000026C9000-memory.dmp

Filesize
2.7MB

Download
memory/3736-6-0x0000000002420000-0x000000000294F000-memory.dmp

Filesize
5.2MB

Download
memory/3736-3-0x0000000002420000-0x000000000294F000-memory.dmp

Filesize
5.2MB

Download
memory/3736-9-0x0000000068AC0000-0x0000000068ACC000-memory.dmp

Filesize
48KB

Download
memory/3736-10-0x000000006FC40000-0x000000006FD41000-memory.dmp

Filesize
1.0MB

Download
memory/3736-11-0x0000000064940000-0x0000000064954000-memory.dmp

Filesize
80KB

Download
memory/3736-8-0x000000006E940000-0x000000006E964000-memory.dmp

Filesize
144KB

Download
memory/3736-7-0x0000000063400000-0x0000000063415000-memory.dmp

Filesize
84KB

Download
memory/3736-12-0x0000000061940000-0x0000000061EB5000-memory.dmp

Filesize
5.5MB

Download