fatalrat | 23e975c4d458f7e301752b7973418a6b07659ab1731e2cd19fe89995dc52ac7e

Analysis

max time kernel
141s
max time network
150s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
27-02-2023 08:26

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General

Target

d747bab2dbb84ce007f7c48d2a3fc352.dll
Size

64KB
MD5

d747bab2dbb84ce007f7c48d2a3fc352
SHA1

73fafe93ad6fd104fcfb8feae8d782d0f0e7ead4
SHA256

23e975c4d458f7e301752b7973418a6b07659ab1731e2cd19fe89995dc52ac7e
SHA512

33341583fbf9ad00bb647a0362279c1ea4d83a1d2bf8ab174fa87a24fe3f5a4768aa0a2a03ca010b989181943ca07f2987a16834cc17e3d9418896c367724ad4
SSDEEP

1536:54kwdbdWdqFMrUt1KoyqkzhjShwP6eSTyCJLmWYNW:54kwdbdkqpQqKI4zELOQ

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 2 IoCs

rat infostealer

Processes:

resource	yara_rule
behavioral1/memory/1952-56-0x0000000000900000-0x000000000094E000-memory.dmp	fatalrat
behavioral1/memory/1952-57-0x0000000000950000-0x0000000000978000-memory.dmp	fatalrat

Blocklisted process makes network request 2 IoCs

Processes:

rundll32.exe

flow pid process

1 1952 rundll32.exe
2 1952 rundll32.exe

flow	pid	process
1	1952	rundll32.exe
2	1952	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

Processes:

rundll32.exe

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

Suspicious behavior: EnumeratesProcesses 51 IoCs

Processes:

rundll32.exe

pid	process
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe
1952	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 1604 wrote to memory of 1952	1604	rundll32.exe	rundll32.exe
PID 1604 wrote to memory of 1952	1604	rundll32.exe	rundll32.exe
PID 1604 wrote to memory of 1952	1604	rundll32.exe	rundll32.exe
PID 1604 wrote to memory of 1952	1604	rundll32.exe	rundll32.exe
PID 1604 wrote to memory of 1952	1604	rundll32.exe	rundll32.exe
PID 1604 wrote to memory of 1952	1604	rundll32.exe	rundll32.exe
PID 1604 wrote to memory of 1952	1604	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\d747bab2dbb84ce007f7c48d2a3fc352.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1604

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\d747bab2dbb84ce007f7c48d2a3fc352.dll,#1
2⤵
- Blocklisted process makes network request
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:1952

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/1952-54-0x0000000010000000-0x000000001001E000-memory.dmp

Filesize
120KB

Download
memory/1952-55-0x0000000010000000-0x000000001001E000-memory.dmp

Filesize
120KB

Download
memory/1952-56-0x0000000000900000-0x000000000094E000-memory.dmp

Filesize
312KB

Download
memory/1952-57-0x0000000000950000-0x0000000000978000-memory.dmp

Filesize
160KB

Download