fatalrat | a3c88dbd18aa404126501e6531d3f7c1074d4fda766a352169f6fb2f456eb7aa

Analysis

max time kernel
120s
max time network
144s
platform
windows7_x64
resource
win7-20230831-en
resource tags

arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
submitted
02/10/2023, 10:55

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

a3c88dbd18aa404126501e6531d3f7c1074d4fda766a352169f6fb2f456eb7aa.dll
Size

338KB
MD5

b22437509d9d7ccd0205cd16dd0e8a20
SHA1

789e491faba1231d45c2a66467e0e8a33748458b
SHA256

a3c88dbd18aa404126501e6531d3f7c1074d4fda766a352169f6fb2f456eb7aa
SHA512

9920509fea6faa3f9e916d43f7ec509d39f533ce901d7f077b6abf9843fad2cf02607aaf97d285123870a6080540d6681cd4145bfb2f3c0ebeb7dc802a37048f
SSDEEP

3072:Nzm0lMGsY4Xjn7TmVlbvWa3EzPELCgx6vY:YDGV4Xz7aoGUvY

Score

10^/10

fatalrat 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

resource	yara_rule
behavioral1/memory/2820-6-0x0000000000830000-0x000000000085A000-memory.dmp	fatalrat

Blocklisted process makes network request 2 IoCs

flow	pid	Process
2	2820	rundll32.exe
3	2820	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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	rundll32.exe

Suspicious behavior: EnumeratesProcesses 51 IoCs

pid	Process
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe
2820	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2820	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2052 wrote to memory of 2820	2052	rundll32.exe	28
PID 2052 wrote to memory of 2820	2052	rundll32.exe	28
PID 2052 wrote to memory of 2820	2052	rundll32.exe	28
PID 2052 wrote to memory of 2820	2052	rundll32.exe	28
PID 2052 wrote to memory of 2820	2052	rundll32.exe	28
PID 2052 wrote to memory of 2820	2052	rundll32.exe	28
PID 2052 wrote to memory of 2820	2052	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a3c88dbd18aa404126501e6531d3f7c1074d4fda766a352169f6fb2f456eb7aa.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2052
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\a3c88dbd18aa404126501e6531d3f7c1074d4fda766a352169f6fb2f456eb7aa.dll,#1
  2⤵
  - Blocklisted process makes network request
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2820

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/2820-0-0x00000000002B0000-0x00000000002E5000-memory.dmp

Filesize
212KB

Download
memory/2820-1-0x0000000000100000-0x0000000000101000-memory.dmp

Filesize
4KB

Download
memory/2820-3-0x00000000007F0000-0x0000000000828000-memory.dmp

Filesize
224KB

Download
memory/2820-2-0x0000000010000000-0x0000000010031000-memory.dmp

Filesize
196KB

Download
memory/2820-6-0x0000000000830000-0x000000000085A000-memory.dmp

Filesize
168KB

Download
memory/2820-11-0x00000000002B0000-0x00000000002E5000-memory.dmp

Filesize
212KB

Download