fatalrat | 81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb

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/1524-25-0x0000000010000000-0x000000001002A000-memory.dmp	fatalrat

Executes dropped EXE 1 IoCs

Processes:

spolsvt.exe

pid process

1524 spolsvt.exe

Loads dropped DLL 2 IoCs

Processes:

81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe

pid	process
2400	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe
2400	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe

description	pid	process	target process
PID 2400 set thread context of 1524	2400	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe	spolsvt.exe

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

Suspicious behavior: EnumeratesProcesses 55 IoCs

Processes:

spolsvt.exe81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe

pid	process
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
1524	spolsvt.exe
2400	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe
2400	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe
2400	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe
2400	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

spolsvt.exe

description pid process

Token: SeDebugPrivilege 1524 spolsvt.exe

description	pid	process
Token: SeDebugPrivilege	1524	spolsvt.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe

pid	process
2400	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe
2400	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe

description	pid	process	target process
PID 2400 wrote to memory of 1524	2400	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe	spolsvt.exe
PID 2400 wrote to memory of 1524	2400	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe	spolsvt.exe
PID 2400 wrote to memory of 1524	2400	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe	spolsvt.exe
PID 2400 wrote to memory of 1524	2400	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe	spolsvt.exe
PID 2400 wrote to memory of 1524	2400	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe	spolsvt.exe
PID 2400 wrote to memory of 1524	2400	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe	spolsvt.exe
PID 2400 wrote to memory of 1524	2400	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe	spolsvt.exe
PID 2400 wrote to memory of 1524	2400	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe	spolsvt.exe
PID 2400 wrote to memory of 1524	2400	81aa5f2d6f5ea81d39ea4588900b147b4890efa32d9c0d6d92d0cc2740d136fb.exe	spolsvt.exe

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:2400
- 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:1524

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
16KB

MD5
cdce4713e784ae069d73723034a957ff

SHA1
9a393a6bab6568f1a774fb753353223f11367e09

SHA256
b29e48102ecb3d3614e8980a8b8cc63dd2b993c6346f466479244ec2b47b69d8

SHA512
0a3a59a305cc2a6fad4e1315b0bcc5a4129595dfe1e8b703363fa02528d2d7c48d3fd22d365708be84a5557cf1916873df9563c454732f93f94a66e7e3b9fb0f

Download Submit
memory/1524-12-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1524-13-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1524-24-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1524-20-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1524-19-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1524-9-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1524-16-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1524-25-0x0000000010000000-0x000000001002A000-memory.dmp

Filesize
168KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads