fatalrat | a077489b265c104221dfb96cc6ae35abc267eba883fc6100cc878e223fb5f411

Analysis

max time kernel
148s
max time network
93s
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 10:09

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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 2 IoCs

resource	yara_rule
behavioral2/memory/2264-9-0x0000000010000000-0x00000000103DD000-memory.dmp	family_gh0strat
behavioral2/memory/2264-1-0x0000000002470000-0x00000000024B2000-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 2 IoCs

rat infostealer

resource	yara_rule
behavioral2/memory/2264-9-0x0000000010000000-0x00000000103DD000-memory.dmp	fatalrat
behavioral2/memory/2264-1-0x0000000002470000-0x00000000024B2000-memory.dmp	fatalrat

Blocklisted process makes network request 1 IoCs

flow	pid	Process
7	2264	rundll32.exe

Executes dropped EXE 1 IoCs

pid	Process
4880	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 1 IoCs

pid	Process
2264	rundll32.exe

Drops file in Windows directory 2 IoCs

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

Kills process with taskkill 1 IoCs

evasion

pid	Process
3048	taskkill.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2264	rundll32.exe
2264	rundll32.exe
2264	rundll32.exe
2264	rundll32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2264	rundll32.exe
Token: SeDebugPrivilege	3048	taskkill.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2264	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4444 wrote to memory of 2264	4444	rundll32.exe	17
PID 4444 wrote to memory of 2264	4444	rundll32.exe	17
PID 4444 wrote to memory of 2264	4444	rundll32.exe	17
PID 2264 wrote to memory of 3048	2264	rundll32.exe	46
PID 2264 wrote to memory of 3048	2264	rundll32.exe	46
PID 2264 wrote to memory of 3048	2264	rundll32.exe	46

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a077489b265c104221dfb96cc6ae35abc267eba883fc6100cc878e223fb5f411.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4444
- 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
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2264
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /f /im rundll32.exe
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3048

C:\Windows\Svwxya.exe
C:\Windows\Svwxya.exe
1⤵
- Executes dropped EXE
PID:4880

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

C:\Windows\Svwxya.exe

Filesize
19KB

MD5
35b3d57c1b8893f19c358ba05189f6af

SHA1
8fca5f1978271b5d27d7de0c9f8e072244225662

SHA256
fec5463a752ba5655f9ef640190a284aed586a0346a413d8331c65a15b784bb0

SHA512
53ac5fd111209a3b1feca8f84f00b926ac4042afe7979152cbb0dc7c9ec4783f752bf25bfb248e360599aa397e2e93ad2dc6046d7f0ba421cba327e7b15195f2

Download Submit
memory/2264-0-0x0000000010000000-0x00000000103DD000-memory.dmp

Filesize
3.9MB

Download
memory/2264-9-0x0000000010000000-0x00000000103DD000-memory.dmp

Filesize
3.9MB

Download
memory/2264-1-0x0000000002470000-0x00000000024B2000-memory.dmp

Filesize
264KB

Download