fatalrat | 4f45fa1686e9ded78d6b3f2ea6d7f21a92f09be8af2f0f4bebff992ee4e4d74b

General

Target

win32quickq.exe
Size

98.7MB
MD5

274b5005729ff3ca3a84bdde29ed25df
SHA1

10ced7c4d0e30cc4c778c2b6f699d0da15634785
SHA256

4f45fa1686e9ded78d6b3f2ea6d7f21a92f09be8af2f0f4bebff992ee4e4d74b
SHA512

7ea1c9e10cdc609590db8301feb78bea0225be0412a4d31c9d286d152a8b6b1ae4e11068838a23621e744e7e4c16999a9b144c549f5878ecb71ef0aa74383f69
SSDEEP

3145728:nHFnG0mmO2y9E/IVswt2FKgFeCmn8b7OEzw:HL60as5YgtFmEz

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
behavioral2/memory/3068-63-0x0000000010000000-0x0000000010029000-memory.dmp	fatalrat

Executes dropped EXE 6 IoCs

Processes:

sg.tmpuyd.exeQTalk.exespolsvt.exespolsvt.exesvcoth.exe

pid process

3004 sg.tmp
2368 uyd.exe
2896 QTalk.exe
4996 spolsvt.exe
3068 spolsvt.exe
4248 svcoth.exe

pid	process
3004	sg.tmp
2368	uyd.exe
2896	QTalk.exe
4996	spolsvt.exe
3068	spolsvt.exe
4248	svcoth.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

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	target process
PID 2896 set thread context of 4996	2896	QTalk.exe	spolsvt.exe
PID 4996 set thread context of 3068	4996	spolsvt.exe	spolsvt.exe
PID 4996 set thread context of 4248	4996	spolsvt.exe	svcoth.exe

Drops file in Program Files directory 5 IoCs

Processes:

sg.tmpwin32quickq.exe

description	ioc	process
File created	C:\Program Files (x86)\win32-quickq.exe	sg.tmp
File opened for modification	C:\Program Files (x86)\win32-quickq.exe	sg.tmp
File opened for modification	C:\Program Files (x86)\Internet Explorer\images	win32quickq.exe
File created	C:\Program Files (x86)\uyd.exe	sg.tmp
File opened for modification	C:\Program Files (x86)\uyd.exe	sg.tmp

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 7 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:

spolsvt.exesvcoth.exewin32quickq.exewin32quickq.exeuyd.exeQTalk.exespolsvt.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spolsvt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svcoth.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	win32quickq.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	win32quickq.exe
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

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

uyd.exewin32quickq.exespolsvt.exe

pid	process
2368	uyd.exe
2368	uyd.exe
1060	win32quickq.exe
1060	win32quickq.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe
3068	spolsvt.exe

Suspicious use of AdjustPrivilegeToken 23 IoCs

Processes:

win32quickq.exewin32quickq.exesg.tmpspolsvt.exe

description	pid	process
Token: SeBackupPrivilege	1060	win32quickq.exe
Token: SeRestorePrivilege	1060	win32quickq.exe
Token: 33	1060	win32quickq.exe
Token: SeIncBasePriorityPrivilege	1060	win32quickq.exe
Token: SeCreateGlobalPrivilege	1060	win32quickq.exe
Token: 33	1060	win32quickq.exe
Token: SeIncBasePriorityPrivilege	1060	win32quickq.exe
Token: 33	1060	win32quickq.exe
Token: SeIncBasePriorityPrivilege	1060	win32quickq.exe
Token: SeBackupPrivilege	1744	win32quickq.exe
Token: SeRestorePrivilege	1744	win32quickq.exe
Token: 33	1744	win32quickq.exe
Token: SeIncBasePriorityPrivilege	1744	win32quickq.exe
Token: 33	1060	win32quickq.exe
Token: SeIncBasePriorityPrivilege	1060	win32quickq.exe
Token: SeRestorePrivilege	3004	sg.tmp
Token: 35	3004	sg.tmp
Token: SeSecurityPrivilege	3004	sg.tmp
Token: SeSecurityPrivilege	3004	sg.tmp
Token: 33	1060	win32quickq.exe
Token: SeIncBasePriorityPrivilege	1060	win32quickq.exe
Token: SeDebugPrivilege	1060	win32quickq.exe
Token: SeDebugPrivilege	3068	spolsvt.exe

Suspicious use of SetWindowsHookEx 5 IoCs

Processes:

uyd.exeQTalk.exespolsvt.exe

pid process

2368 uyd.exe
2368 uyd.exe
2896 QTalk.exe
2896 QTalk.exe
4996 spolsvt.exe

Suspicious use of WriteProcessMemory 40 IoCs

Processes:

win32quickq.exeuyd.exeQTalk.exespolsvt.exe

description	pid	process	target process
PID 1060 wrote to memory of 3580	1060	win32quickq.exe	cmd.exe
PID 1060 wrote to memory of 3580	1060	win32quickq.exe	cmd.exe
PID 1060 wrote to memory of 1744	1060	win32quickq.exe	win32quickq.exe
PID 1060 wrote to memory of 1744	1060	win32quickq.exe	win32quickq.exe
PID 1060 wrote to memory of 1744	1060	win32quickq.exe	win32quickq.exe
PID 1060 wrote to memory of 3004	1060	win32quickq.exe	sg.tmp
PID 1060 wrote to memory of 3004	1060	win32quickq.exe	sg.tmp
PID 1060 wrote to memory of 3004	1060	win32quickq.exe	sg.tmp
PID 1060 wrote to memory of 2368	1060	win32quickq.exe	uyd.exe
PID 1060 wrote to memory of 2368	1060	win32quickq.exe	uyd.exe
PID 1060 wrote to memory of 2368	1060	win32quickq.exe	uyd.exe
PID 2368 wrote to memory of 2896	2368	uyd.exe	QTalk.exe
PID 2368 wrote to memory of 2896	2368	uyd.exe	QTalk.exe
PID 2368 wrote to memory of 2896	2368	uyd.exe	QTalk.exe
PID 2896 wrote to memory of 4996	2896	QTalk.exe	spolsvt.exe
PID 2896 wrote to memory of 4996	2896	QTalk.exe	spolsvt.exe
PID 2896 wrote to memory of 4996	2896	QTalk.exe	spolsvt.exe
PID 2896 wrote to memory of 4996	2896	QTalk.exe	spolsvt.exe
PID 2896 wrote to memory of 4996	2896	QTalk.exe	spolsvt.exe
PID 2896 wrote to memory of 4996	2896	QTalk.exe	spolsvt.exe
PID 2896 wrote to memory of 4996	2896	QTalk.exe	spolsvt.exe
PID 2896 wrote to memory of 4996	2896	QTalk.exe	spolsvt.exe
PID 4996 wrote to memory of 3068	4996	spolsvt.exe	spolsvt.exe
PID 4996 wrote to memory of 3068	4996	spolsvt.exe	spolsvt.exe
PID 4996 wrote to memory of 3068	4996	spolsvt.exe	spolsvt.exe
PID 4996 wrote to memory of 3068	4996	spolsvt.exe	spolsvt.exe
PID 4996 wrote to memory of 3068	4996	spolsvt.exe	spolsvt.exe
PID 4996 wrote to memory of 3068	4996	spolsvt.exe	spolsvt.exe
PID 4996 wrote to memory of 3068	4996	spolsvt.exe	spolsvt.exe
PID 4996 wrote to memory of 3068	4996	spolsvt.exe	spolsvt.exe
PID 4996 wrote to memory of 4248	4996	spolsvt.exe	svcoth.exe
PID 4996 wrote to memory of 4248	4996	spolsvt.exe	svcoth.exe
PID 4996 wrote to memory of 4248	4996	spolsvt.exe	svcoth.exe
PID 4996 wrote to memory of 4248	4996	spolsvt.exe	svcoth.exe
PID 4996 wrote to memory of 4248	4996	spolsvt.exe	svcoth.exe
PID 4996 wrote to memory of 4248	4996	spolsvt.exe	svcoth.exe
PID 4996 wrote to memory of 4248	4996	spolsvt.exe	svcoth.exe
PID 4996 wrote to memory of 4248	4996	spolsvt.exe	svcoth.exe
PID 4996 wrote to memory of 4248	4996	spolsvt.exe	svcoth.exe
PID 4996 wrote to memory of 4248	4996	spolsvt.exe	svcoth.exe

C:\Users\Admin\AppData\Local\Temp\win32quickq.exe
"C:\Users\Admin\AppData\Local\Temp\win32quickq.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1060
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c set
  2⤵
  PID:3580
- C:\Users\Admin\AppData\Local\Temp\win32quickq.exe
  PECMD**pecmd-cmd* PUTF -dd -skipb=1627136 -len=101907377 "C:\Users\Admin\AppData\Local\Temp\~4006219909093404879.tmp",,C:\Users\Admin\AppData\Local\Temp\win32quickq.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:1744
- C:\Users\Admin\AppData\Local\Temp\~1219350269528858537~\sg.tmp
  7zG_exe x "C:\Users\Admin\AppData\Local\Temp\~4006219909093404879.tmp" -y -aoa -o"C:\Program Files (x86)\"
  2⤵
  - Executes dropped EXE
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  PID:3004
- C:\Program Files (x86)\uyd.exe
  "C:\Program Files (x86)\\uyd.exe"
  2⤵
  - Executes dropped EXE
  - 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:2368
- - C:\Users\Public\Documents\sougou\V4.6.80\Bin\QTalk.exe
    C:\Users\Public\Documents\sougou\V4.6.80\Bin\QTalk.exe
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2896
  - - C:\Users\Public\Documents\sougou\spolsvt.exe
      C:\Users\Public\Documents\sougou\spolsvt.exe
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:4996
    - - C:\Users\Public\Documents\dd\spolsvt.exe
        
        C:\Users\Public\Documents\dd\spolsvt.exe
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3068
    - - C:\Users\Public\Documents\uu\svcoth.exe
        
        C:\Users\Public\Documents\uu\svcoth.exe
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        
        PID:4248

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files (x86)\uyd.exe

Filesize
5.5MB

MD5
d93c1d23a9fc68d89b3e3fcd43f0eb5b

SHA1
bc3220fb83d7dd0cddc538f7a33210db69786d20

SHA256
34951139a5201dd1d13d11c5aec344a25dedc79bc0fce0e7e59fdb46af10ca37

SHA512
730567800469641b24bca28af77a82462b0a7f3b16ea318fb945be106250b20db4fb3fb19b098a1cefed6d4b222989195eac606b028f4652332025b1554d7ab1

Download Submit
C:\Users\Admin\AppData\Local\Temp\~1219350269528858537~\sg.tmp

Filesize
715KB

MD5
7c4718943bd3f66ebdb47ccca72c7b1e

SHA1
f9edfaa7adb8fa528b2e61b2b251f18da10a6969

SHA256
4cc32d00338fc7b206a7c052297acf9ac304ae7de9d61a2475a116959c1524fc

SHA512
e18c40d646fa4948f90f7471da55489df431f255041ebb6dcef86346f91078c9b27894e27216a4b2fe2a1c5e501c7953c77893cf696930123d28a322d49e1516

Download Submit
C:\Users\Admin\AppData\Local\Temp\~~2504204694851650911.tmp

Filesize
124B

MD5
378418d75ea13c69105a1e1ab4461fd3

SHA1
450c36ae2da3e5ba697597ed436a35f972f03aab

SHA256
256183e2d420da3614bfcbe6f0f52cfc50c6615723d439932936d8a6caf73e75

SHA512
6382d97ae3616d4d1092fe317132e97989890c7e6db37d78431147d8c331cf82fe7d978952c6448197b9eabceff44bd8bb2c7d9af5875536a6715e47be85954d

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

Filesize
9KB

MD5
523d5c39f9d8d2375c3df68251fa2249

SHA1
d4ed365c44bec9246fc1a65a32a7791792647a10

SHA256
20e3dc90a3e83b6202e2a7f4603b60e5e859639cb68693426c400b13aaeabd78

SHA512
526e1bba30d03f1ac177c6ab7409187a730969c429cebef15da68ffcf44b3b93227781eebc827b2f7a0fa17c391e00a0e532263fd0167aeaeb0456f96cfe3ae4

Download Submit
memory/2368-26-0x0000000000400000-0x00000000009BE000-memory.dmp

Filesize
5.7MB

Download
memory/2368-62-0x0000000000400000-0x00000000009BE000-memory.dmp

Filesize
5.7MB

Download
memory/2896-50-0x0000000000400000-0x00000000009BE000-memory.dmp

Filesize
5.7MB

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

Filesize
192KB

Download
memory/3068-63-0x0000000010000000-0x0000000010029000-memory.dmp

Filesize
164KB

Download
memory/3068-56-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

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

Filesize
192KB

Download
memory/3068-61-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/4248-80-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/4248-75-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/4248-76-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/4248-73-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/4248-74-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/4248-72-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/4996-49-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/4996-44-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/4996-42-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/4996-48-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/4996-43-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads