fatalrat | d5f1a67929e16bc93f8f1b889bfa38fdf4236391319b2fc9682aff365124cc2b

Analysis

max time kernel
149s
max time network
149s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
10-09-2024 04:39

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General

Target

uyd.exe
Size

5.6MB
MD5

2295488c4b91a2e19e098945b5d52bf7
SHA1

2b2c51cf640e158b9a811bb520e1d5f0844ea021
SHA256

41bd610f99dfe3d52e864906ea891f2df5f4072726591697bfc678bfa26ecd69
SHA512

b47bab5f79d64eaaa6dea25cc6d69dc1aca6fd8ca39dc7813660eb20df2d592fdbf28b8671e01a0f0cbc388ed638aae397bbe056a926cc1dda8d0ff8611e02a4
SSDEEP

98304:JJIK4qnhD6HBnpg5negdwSfeP6cBMGZ7lo+H3FtoqFZojg1:JJIKtmpg9ASfeP6ceYH3FtoqFOQ

Score

10^/10

fatalrat discovery evasion infostealer persistence rat trojan

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/3068-70-0x0000000010000000-0x0000000010029000-memory.dmp	fatalrat

Executes dropped EXE 4 IoCs

Processes:

QTalk.exespolsvt.exespolsvt.exesvcoth.exe

pid	Process
2808	QTalk.exe
2964	spolsvt.exe
3068	spolsvt.exe
2628	svcoth.exe

Loads dropped DLL 7 IoCs

Processes:

uyd.exeQTalk.exespolsvt.exe

pid	Process
1852	uyd.exe
2808	QTalk.exe
2808	QTalk.exe
2964	spolsvt.exe
2964	spolsvt.exe
2964	spolsvt.exe
2964	spolsvt.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

uyd.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Çý¶¯ÈËÉú = "C:\\Users\\Public\\Documents\\sougou\\PTvrst.exe"	uyd.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

uyd.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	uyd.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

QTalk.exespolsvt.exe

description	pid	Process	procid_target
PID 2808 set thread context of 2964	2808	QTalk.exe	33
PID 2964 set thread context of 3068	2964	spolsvt.exe	34
PID 2964 set thread context of 2628	2964	spolsvt.exe	35

System Location Discovery: System Language Discovery 1 TTPs 5 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:

uyd.exeQTalk.exespolsvt.exespolsvt.exesvcoth.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	uyd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	QTalk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spolsvt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spolsvt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svcoth.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

uyd.exe

pid	Process
1852	uyd.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

spolsvt.exe

description	pid	Process
Token: SeDebugPrivilege	3068	spolsvt.exe

Suspicious use of SetWindowsHookEx 5 IoCs

Processes:

uyd.exeQTalk.exespolsvt.exe

pid	Process
1852	uyd.exe
1852	uyd.exe
2808	QTalk.exe
2808	QTalk.exe
2964	spolsvt.exe

Suspicious use of WriteProcessMemory 33 IoCs

Processes:

uyd.exeQTalk.exespolsvt.exe

description	pid	Process	procid_target
PID 1852 wrote to memory of 2808	1852	uyd.exe	32
PID 1852 wrote to memory of 2808	1852	uyd.exe	32
PID 1852 wrote to memory of 2808	1852	uyd.exe	32
PID 1852 wrote to memory of 2808	1852	uyd.exe	32
PID 2808 wrote to memory of 2964	2808	QTalk.exe	33
PID 2808 wrote to memory of 2964	2808	QTalk.exe	33
PID 2808 wrote to memory of 2964	2808	QTalk.exe	33
PID 2808 wrote to memory of 2964	2808	QTalk.exe	33
PID 2808 wrote to memory of 2964	2808	QTalk.exe	33
PID 2808 wrote to memory of 2964	2808	QTalk.exe	33
PID 2808 wrote to memory of 2964	2808	QTalk.exe	33
PID 2808 wrote to memory of 2964	2808	QTalk.exe	33
PID 2808 wrote to memory of 2964	2808	QTalk.exe	33
PID 2964 wrote to memory of 3068	2964	spolsvt.exe	34
PID 2964 wrote to memory of 3068	2964	spolsvt.exe	34
PID 2964 wrote to memory of 3068	2964	spolsvt.exe	34
PID 2964 wrote to memory of 3068	2964	spolsvt.exe	34
PID 2964 wrote to memory of 3068	2964	spolsvt.exe	34
PID 2964 wrote to memory of 3068	2964	spolsvt.exe	34
PID 2964 wrote to memory of 3068	2964	spolsvt.exe	34
PID 2964 wrote to memory of 3068	2964	spolsvt.exe	34
PID 2964 wrote to memory of 3068	2964	spolsvt.exe	34
PID 2964 wrote to memory of 2628	2964	spolsvt.exe	35
PID 2964 wrote to memory of 2628	2964	spolsvt.exe	35
PID 2964 wrote to memory of 2628	2964	spolsvt.exe	35
PID 2964 wrote to memory of 2628	2964	spolsvt.exe	35
PID 2964 wrote to memory of 2628	2964	spolsvt.exe	35
PID 2964 wrote to memory of 2628	2964	spolsvt.exe	35
PID 2964 wrote to memory of 2628	2964	spolsvt.exe	35
PID 2964 wrote to memory of 2628	2964	spolsvt.exe	35
PID 2964 wrote to memory of 2628	2964	spolsvt.exe	35
PID 2964 wrote to memory of 2628	2964	spolsvt.exe	35
PID 2964 wrote to memory of 2628	2964	spolsvt.exe	35

C:\Users\Admin\AppData\Local\Temp\uyd.exe
"C:\Users\Admin\AppData\Local\Temp\uyd.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Checks whether UAC is enabled
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1852
- C:\Users\Public\Documents\sougou\V4.6.80\Bin\QTalk.exe
  C:\Users\Public\Documents\sougou\V4.6.80\Bin\QTalk.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2808
- - C:\Users\Public\Documents\sougou\spolsvt.exe
    C:\Users\Public\Documents\sougou\spolsvt.exe
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2964
  - - C:\Users\Public\Documents\dd\spolsvt.exe
      C:\Users\Public\Documents\dd\spolsvt.exe
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      PID:3068
  - - C:\Users\Public\Documents\uu\svcoth.exe
      C:\Users\Public\Documents\uu\svcoth.exe
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:2628

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Public\Documents\dd\spolsvt.exe

Filesize
16KB

MD5
cdce4713e784ae069d73723034a957ff

SHA1
9a393a6bab6568f1a774fb753353223f11367e09

SHA256
b29e48102ecb3d3614e8980a8b8cc63dd2b993c6346f466479244ec2b47b69d8

SHA512
0a3a59a305cc2a6fad4e1315b0bcc5a4129595dfe1e8b703363fa02528d2d7c48d3fd22d365708be84a5557cf1916873df9563c454732f93f94a66e7e3b9fb0f

Download Submit
C:\Users\Public\Documents\sougou\Mpec.mbt

Filesize
219KB

MD5
6fa8f3c5e7670094a1f66035bdce541c

SHA1
122fcba8f761eb3695a948b68be2cb803a43d903

SHA256
f2a8b444d6cc5d3a88d10e5d2388e91a17248a1191d8780c62761bae10574c45

SHA512
9e6d3b2d764e2ad716c9246c574af62eec2a6e76f1b95db7c8ac684372e6660a43d8dd2bbcabffe66013ea99612114dea28a62caaef530add20725a230672e67

Download Submit
\Users\Public\Documents\sougou\V4.6.80\Bin\QTalk.exe

Filesize
5.6MB

MD5
2295488c4b91a2e19e098945b5d52bf7

SHA1
2b2c51cf640e158b9a811bb520e1d5f0844ea021

SHA256
41bd610f99dfe3d52e864906ea891f2df5f4072726591697bfc678bfa26ecd69

SHA512
b47bab5f79d64eaaa6dea25cc6d69dc1aca6fd8ca39dc7813660eb20df2d592fdbf28b8671e01a0f0cbc388ed638aae397bbe056a926cc1dda8d0ff8611e02a4

Download Submit
\Users\Public\Documents\sougou\spolsvt.exe

Filesize
9KB

MD5
523d5c39f9d8d2375c3df68251fa2249

SHA1
d4ed365c44bec9246fc1a65a32a7791792647a10

SHA256
20e3dc90a3e83b6202e2a7f4603b60e5e859639cb68693426c400b13aaeabd78

SHA512
526e1bba30d03f1ac177c6ab7409187a730969c429cebef15da68ffcf44b3b93227781eebc827b2f7a0fa17c391e00a0e532263fd0167aeaeb0456f96cfe3ae4

Download Submit
memory/1852-0-0x0000000000400000-0x00000000009D1000-memory.dmp

Filesize
5.8MB

Download
memory/1852-69-0x0000000000400000-0x00000000009D1000-memory.dmp

Filesize
5.8MB

Download
memory/2628-86-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2628-85-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2628-84-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2628-88-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2628-90-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2628-92-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2628-98-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2628-94-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2808-44-0x0000000000400000-0x00000000009D1000-memory.dmp

Filesize
5.8MB

Download
memory/2808-22-0x0000000000400000-0x00000000009D1000-memory.dmp

Filesize
5.8MB

Download
memory/2964-38-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2964-29-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/2964-27-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/2964-42-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/2964-37-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/2964-34-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/2964-31-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/3068-57-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/3068-53-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/3068-60-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/3068-70-0x0000000010000000-0x0000000010029000-memory.dmp

Filesize
164KB

Download
memory/3068-55-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/3068-68-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/3068-63-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/3068-64-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download