fatalrat | a077489b265c104221dfb96cc6ae35abc267eba883fc6100cc878e223fb5f411

Analysis

max time kernel
143s
max time network
165s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
06-01-2024 09:47

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General

Target

a077489b265c104221dfb96cc6ae35abc267eba883fc6100cc878e223fb5f411.dll
Size

1.3MB
MD5

7ca7294f899f09df43135243afabc81f
SHA1

552fe1a6014a07963edea0187b3422771ca04c26
SHA256

a077489b265c104221dfb96cc6ae35abc267eba883fc6100cc878e223fb5f411
SHA512

c41a24abb8a6b4e39b1a99cfbc7db0d29d171f00e1be9e130a0c630147d99c4e7385f3fc05946e18aed3524acd8c0f1daecb87c5620e3e5bfc37bde587af6d9f
SSDEEP

24576:qt8lUXMfdZFwH4ucgkrJiu+72qLs9qOet1Wz6f99tHP7F6X8VZH:qqXSY3uu+72Es9VeDW+R+o

Score

10^/10

fatalrat gh0strat infostealer rat

Malware Config

Signatures

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

Gh0st RAT payload 3 IoCs

resource	yara_rule
behavioral2/memory/2032-1-0x00000000034C0000-0x0000000003502000-memory.dmp	family_gh0strat
behavioral2/memory/2032-9-0x0000000010000000-0x00000000103DD000-memory.dmp	family_gh0strat
behavioral2/memory/2032-10-0x0000000010000000-0x00000000103DD000-memory.dmp	family_gh0strat

Gh0strat
Gh0st RAT is a remote access tool (RAT) with its source code public and it has been used by multiple Chinese groups.
rat gh0strat

Fatal Rat payload 3 IoCs

rat infostealer

resource	yara_rule
behavioral2/memory/2032-1-0x00000000034C0000-0x0000000003502000-memory.dmp	fatalrat
behavioral2/memory/2032-9-0x0000000010000000-0x00000000103DD000-memory.dmp	fatalrat
behavioral2/memory/2032-10-0x0000000010000000-0x00000000103DD000-memory.dmp	fatalrat

Blocklisted process makes network request 1 IoCs

flow	pid	Process
44	2032	rundll32.exe

Executes dropped EXE 1 IoCs

pid	Process
4628	Svwxya.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\rundll32.exe	rundll32.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2032	rundll32.exe
2032	rundll32.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Svwxya.exe	rundll32.exe
File created	C:\Windows\Svwxya.exe	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

Kills process with taskkill 1 IoCs

evasion

pid	Process
528	taskkill.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2032	rundll32.exe
2032	rundll32.exe
2032	rundll32.exe
2032	rundll32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2032	rundll32.exe
Token: SeDebugPrivilege	528	taskkill.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2032	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4904 wrote to memory of 2032	4904	rundll32.exe	88
PID 4904 wrote to memory of 2032	4904	rundll32.exe	88
PID 4904 wrote to memory of 2032	4904	rundll32.exe	88
PID 2032 wrote to memory of 528	2032	rundll32.exe	94
PID 2032 wrote to memory of 528	2032	rundll32.exe	94
PID 2032 wrote to memory of 528	2032	rundll32.exe	94

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a077489b265c104221dfb96cc6ae35abc267eba883fc6100cc878e223fb5f411.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4904
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\a077489b265c104221dfb96cc6ae35abc267eba883fc6100cc878e223fb5f411.dll,#1
  2⤵
  - Blocklisted process makes network request
  - Drops file in System32 directory
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Drops file in Windows directory
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2032
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /f /im rundll32.exe
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:528

C:\Windows\Svwxya.exe
C:\Windows\Svwxya.exe
1⤵
- Executes dropped EXE
PID:4628

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

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Downloads

C:\Windows\Svwxya.exe

Filesize
60KB

MD5
889b99c52a60dd49227c5e485a016679

SHA1
8fa889e456aa646a4d0a4349977430ce5fa5e2d7

SHA256
6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910

SHA512
08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641

Download Submit
memory/2032-0-0x0000000010000000-0x00000000103DD000-memory.dmp

Filesize
3.9MB

Download
memory/2032-1-0x00000000034C0000-0x0000000003502000-memory.dmp

Filesize
264KB

Download
memory/2032-9-0x0000000010000000-0x00000000103DD000-memory.dmp

Filesize
3.9MB

Download
memory/2032-10-0x0000000010000000-0x00000000103DD000-memory.dmp

Filesize
3.9MB

Download