fatalrat | 81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb

Analysis

max time kernel
120s
max time network
139s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
27-09-2024 04:56

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General

Target

81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe
Size

932KB
MD5

1db213df340e2fadf2a36c6ddd31f2ec
SHA1

f10891c0f9008bdd1978a214f9d76c895f156bbf
SHA256

81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb
SHA512

49168b4f02bcd44f01844e68b25fb333c5263aca187c1630c3c329e902e3abd21d89ea9d5233340d3876a7df958d77527daa19a94b24004b8c9fd197e8b0180e
SSDEEP

12288:uQ4DOHltXYiYTe/+h3p/ogPeHSA1Kz+EAeuOvth0IZfKErUkqo3KrTm:uQGOFtYpTw+1prwVeuCD9KEolokTm

Score

10^/10

fatalrat discovery infostealer rat

Malware Config

Signatures

FatalRat
FatalRat is a modular infostealer family written in C++ first appearing in June 2021.
infostealer rat fatalrat

Fatal Rat payload 1 IoCs

rat infostealer

Processes:

resource	yara_rule
behavioral1/memory/2340-25-0x0000000010000000-0x000000001002A000-memory.dmp	fatalrat

Executes dropped EXE 1 IoCs

Processes:

spolsvt.exe

pid	Process
2340	spolsvt.exe

Loads dropped DLL 2 IoCs

Processes:

81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe

pid	Process
2272	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe
2272	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe

description	pid	Process	procid_target
PID 2272 set thread context of 2340	2272	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe	30

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:

81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exespolsvt.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spolsvt.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:

spolsvt.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	spolsvt.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	spolsvt.exe

Suspicious behavior: EnumeratesProcesses 55 IoCs

Processes:

spolsvt.exe81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe

pid	Process
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2340	spolsvt.exe
2272	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe
2272	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe
2272	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe
2272	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

spolsvt.exe

description	pid	Process
Token: SeDebugPrivilege	2340	spolsvt.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe

pid	Process
2272	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe
2272	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe

description	pid	Process	procid_target
PID 2272 wrote to memory of 2340	2272	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe	30
PID 2272 wrote to memory of 2340	2272	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe	30
PID 2272 wrote to memory of 2340	2272	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe	30
PID 2272 wrote to memory of 2340	2272	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe	30
PID 2272 wrote to memory of 2340	2272	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe	30
PID 2272 wrote to memory of 2340	2272	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe	30
PID 2272 wrote to memory of 2340	2272	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe	30
PID 2272 wrote to memory of 2340	2272	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe	30
PID 2272 wrote to memory of 2340	2272	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe	30

C:\Users\Admin\AppData\Local\Temp\81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe
"C:\Users\Admin\AppData\Local\Temp\81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2272
- C:\Users\Public\Documents\t\spolsvt.exe
  C:\Users\Public\Documents\t\spolsvt.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2340

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Public\Documents\t\spolsvt.exe

Filesize
16KB

MD5
cdce4713e784ae069d73723034a957ff

SHA1
9a393a6bab6568f1a774fb753353223f11367e09

SHA256
b29e48102ecb3d3614e8980a8b8cc63dd2b993c6346f466479244ec2b47b69d8

SHA512
0a3a59a305cc2a6fad4e1315b0bcc5a4129595dfe1e8b703363fa02528d2d7c48d3fd22d365708be84a5557cf1916873df9563c454732f93f94a66e7e3b9fb0f

Download Submit
memory/2340-11-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2340-24-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2340-20-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2340-19-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2340-16-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2340-14-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2340-9-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2340-25-0x0000000010000000-0x000000001002A000-memory.dmp

Filesize
168KB

Download