fatalrat | 4a857879a18963c27be6897ff664345350c73fa03d9b6d4abd5fc3cbb340f65b

General

Target

win32-quickq_1.exe
Size

98.7MB
MD5

04aa93ac264dad188b6ff159cecd91bb
SHA1

fa0195948980e2c87b19fa204dcf59fcbc3b617a
SHA256

4a857879a18963c27be6897ff664345350c73fa03d9b6d4abd5fc3cbb340f65b
SHA512

84edfddda0c508ce2ecd2cafab0dd25bbcc0a629e746629f496e9652ac865e2801093d54db085f6da5af5b3875fa87fabf90664694bf1152653c502fccc04f82
SSDEEP

3145728:nHjklfmY8m9A8zcpSKpTVfmYOo683CMD7++t6:HjksCofphNO4nm+t

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/220-63-0x0000000010000000-0x000000001002A000-memory.dmp	fatalrat

Executes dropped EXE 6 IoCs

Processes:

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

pid process

436 sg.tmp
892 uyd.exe
3452 QTalk.exe
3808 spolsvt.exe
220 spolsvt.exe
1612 svcoth.exe

pid	process
436	sg.tmp
892	uyd.exe
3452	QTalk.exe
3808	spolsvt.exe
220	spolsvt.exe
1612	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 3452 set thread context of 3808	3452	QTalk.exe	spolsvt.exe
PID 3808 set thread context of 220	3808	spolsvt.exe	spolsvt.exe
PID 3808 set thread context of 1612	3808	spolsvt.exe	svcoth.exe

Drops file in Program Files directory 5 IoCs

Processes:

sg.tmpwin32-quickq_1.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\uyd.exe	sg.tmp
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	win32-quickq_1.exe
File created	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:

win32-quickq_1.exewin32-quickq_1.exeuyd.exeQTalk.exespolsvt.exespolsvt.exesvcoth.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	win32-quickq_1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	win32-quickq_1.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spolsvt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svcoth.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:

spolsvt.exe

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

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

uyd.exewin32-quickq_1.exespolsvt.exe

pid	process
892	uyd.exe
892	uyd.exe
4784	win32-quickq_1.exe
4784	win32-quickq_1.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe
220	spolsvt.exe

Suspicious use of AdjustPrivilegeToken 23 IoCs

Processes:

win32-quickq_1.exewin32-quickq_1.exesg.tmpspolsvt.exe

description	pid	process
Token: SeBackupPrivilege	4784	win32-quickq_1.exe
Token: SeRestorePrivilege	4784	win32-quickq_1.exe
Token: 33	4784	win32-quickq_1.exe
Token: SeIncBasePriorityPrivilege	4784	win32-quickq_1.exe
Token: SeCreateGlobalPrivilege	4784	win32-quickq_1.exe
Token: 33	4784	win32-quickq_1.exe
Token: SeIncBasePriorityPrivilege	4784	win32-quickq_1.exe
Token: 33	4784	win32-quickq_1.exe
Token: SeIncBasePriorityPrivilege	4784	win32-quickq_1.exe
Token: SeBackupPrivilege	4992	win32-quickq_1.exe
Token: SeRestorePrivilege	4992	win32-quickq_1.exe
Token: 33	4992	win32-quickq_1.exe
Token: SeIncBasePriorityPrivilege	4992	win32-quickq_1.exe
Token: 33	4784	win32-quickq_1.exe
Token: SeIncBasePriorityPrivilege	4784	win32-quickq_1.exe
Token: SeRestorePrivilege	436	sg.tmp
Token: 35	436	sg.tmp
Token: SeSecurityPrivilege	436	sg.tmp
Token: SeSecurityPrivilege	436	sg.tmp
Token: 33	4784	win32-quickq_1.exe
Token: SeIncBasePriorityPrivilege	4784	win32-quickq_1.exe
Token: SeDebugPrivilege	4784	win32-quickq_1.exe
Token: SeDebugPrivilege	220	spolsvt.exe

Suspicious use of SetWindowsHookEx 5 IoCs

Processes:

uyd.exeQTalk.exespolsvt.exe

pid process

892 uyd.exe
892 uyd.exe
3452 QTalk.exe
3452 QTalk.exe
3808 spolsvt.exe

Suspicious use of WriteProcessMemory 40 IoCs

Processes:

win32-quickq_1.exeuyd.exeQTalk.exespolsvt.exe

description	pid	process	target process
PID 4784 wrote to memory of 1448	4784	win32-quickq_1.exe	cmd.exe
PID 4784 wrote to memory of 1448	4784	win32-quickq_1.exe	cmd.exe
PID 4784 wrote to memory of 4992	4784	win32-quickq_1.exe	win32-quickq_1.exe
PID 4784 wrote to memory of 4992	4784	win32-quickq_1.exe	win32-quickq_1.exe
PID 4784 wrote to memory of 4992	4784	win32-quickq_1.exe	win32-quickq_1.exe
PID 4784 wrote to memory of 436	4784	win32-quickq_1.exe	sg.tmp
PID 4784 wrote to memory of 436	4784	win32-quickq_1.exe	sg.tmp
PID 4784 wrote to memory of 436	4784	win32-quickq_1.exe	sg.tmp
PID 4784 wrote to memory of 892	4784	win32-quickq_1.exe	uyd.exe
PID 4784 wrote to memory of 892	4784	win32-quickq_1.exe	uyd.exe
PID 4784 wrote to memory of 892	4784	win32-quickq_1.exe	uyd.exe
PID 892 wrote to memory of 3452	892	uyd.exe	QTalk.exe
PID 892 wrote to memory of 3452	892	uyd.exe	QTalk.exe
PID 892 wrote to memory of 3452	892	uyd.exe	QTalk.exe
PID 3452 wrote to memory of 3808	3452	QTalk.exe	spolsvt.exe
PID 3452 wrote to memory of 3808	3452	QTalk.exe	spolsvt.exe
PID 3452 wrote to memory of 3808	3452	QTalk.exe	spolsvt.exe
PID 3452 wrote to memory of 3808	3452	QTalk.exe	spolsvt.exe
PID 3452 wrote to memory of 3808	3452	QTalk.exe	spolsvt.exe
PID 3452 wrote to memory of 3808	3452	QTalk.exe	spolsvt.exe
PID 3452 wrote to memory of 3808	3452	QTalk.exe	spolsvt.exe
PID 3452 wrote to memory of 3808	3452	QTalk.exe	spolsvt.exe
PID 3808 wrote to memory of 220	3808	spolsvt.exe	spolsvt.exe
PID 3808 wrote to memory of 220	3808	spolsvt.exe	spolsvt.exe
PID 3808 wrote to memory of 220	3808	spolsvt.exe	spolsvt.exe
PID 3808 wrote to memory of 220	3808	spolsvt.exe	spolsvt.exe
PID 3808 wrote to memory of 220	3808	spolsvt.exe	spolsvt.exe
PID 3808 wrote to memory of 220	3808	spolsvt.exe	spolsvt.exe
PID 3808 wrote to memory of 220	3808	spolsvt.exe	spolsvt.exe
PID 3808 wrote to memory of 220	3808	spolsvt.exe	spolsvt.exe
PID 3808 wrote to memory of 1612	3808	spolsvt.exe	svcoth.exe
PID 3808 wrote to memory of 1612	3808	spolsvt.exe	svcoth.exe
PID 3808 wrote to memory of 1612	3808	spolsvt.exe	svcoth.exe
PID 3808 wrote to memory of 1612	3808	spolsvt.exe	svcoth.exe
PID 3808 wrote to memory of 1612	3808	spolsvt.exe	svcoth.exe
PID 3808 wrote to memory of 1612	3808	spolsvt.exe	svcoth.exe
PID 3808 wrote to memory of 1612	3808	spolsvt.exe	svcoth.exe
PID 3808 wrote to memory of 1612	3808	spolsvt.exe	svcoth.exe
PID 3808 wrote to memory of 1612	3808	spolsvt.exe	svcoth.exe
PID 3808 wrote to memory of 1612	3808	spolsvt.exe	svcoth.exe

C:\Users\Admin\AppData\Local\Temp\win32-quickq_1.exe
"C:\Users\Admin\AppData\Local\Temp\win32-quickq_1.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:4784
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c set
  2⤵
  PID:1448
- C:\Users\Admin\AppData\Local\Temp\win32-quickq_1.exe
  PECMD**pecmd-cmd* PUTF -dd -skipb=1627136 -len=101900229 "C:\Users\Admin\AppData\Local\Temp\~5077567658294961666.tmp",,C:\Users\Admin\AppData\Local\Temp\win32-quickq_1.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:4992
- C:\Users\Admin\AppData\Local\Temp\~9089149993456443795~\sg.tmp
  7zG_exe x "C:\Users\Admin\AppData\Local\Temp\~5077567658294961666.tmp" -y -aoa -o"C:\Program Files (x86)\"
  2⤵
  - Executes dropped EXE
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  PID:436
- 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:892
- - 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:3452
  - - 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:3808
    - - C:\Users\Public\Documents\dd\spolsvt.exe
        
        C:\Users\Public\Documents\dd\spolsvt.exe
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Checks processor information in registry
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:220
    - - 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:1612
- C:\Users\Admin\AppData\Local\Temp\win32-quickq_1.exe
  PECMD**pecmd-cmd* EXEC -wd:C: -hide cmd /c "C:\Users\Admin\AppData\Local\Temp\~6842340550024472565.cmd"
  2⤵
  PID:2624
- - C:\Windows\SYSTEM32\cmd.exe
    cmd /c "C:\Users\Admin\AppData\Local\Temp\~6842340550024472565.cmd"
    3⤵
    PID:4536
- C:\Users\Admin\AppData\Local\Temp\win32-quickq_1.exe
  PECMD**pecmd-cmd* EXEC -wd:C: -hide cmd /c "C:\Users\Admin\AppData\Local\Temp\~1086201189180184225.cmd"
  2⤵
  PID:2600
- - C:\Windows\SYSTEM32\cmd.exe
    cmd /c "C:\Users\Admin\AppData\Local\Temp\~1086201189180184225.cmd"
    3⤵
    PID:2208

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

Query Registry

1

T1012

System Information Discovery

3

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
5.5MB

MD5
52a442f3ec0cc6160b36b4c2cee0c96b

SHA1
fcdcde577a1d08592f7c7fda24d53b877423e983

SHA256
f1ef9b4b561851c3d8a7ecb9e32f65639233008c5799e1e889bdf5e6fac34446

SHA512
e3718caaa784dcfdad5efec6dadef056923a96cad961f4a35766f067f4f648dbb8164e9c013b5854b5afb75d4630a0e0a6465c29c9564fcd80c970c26cd82e42

Download Submit
C:\Users\Admin\AppData\Local\Temp\~1086201189180184225.cmd

Filesize
371B

MD5
add56cb152aa026cea55fbc27df898f8

SHA1
d59e2c9fccc7bd67ae36169a85ab14ce94068461

SHA256
631ee56fa2a73bc6d333580c237b3d18663ae269d26073bf1224266fa0b664b0

SHA512
7f17831b0e19795cb60c66544a10ae7451bb1d7ffecb0ade1af352ccb360ff177af2be88c381d45f53b34912117fe8ddd64ce485f87f0e2e9f48f18ae939e5c8

Download Submit
C:\Users\Admin\AppData\Local\Temp\~6842340550024472565.cmd

Filesize
280B

MD5
42ff656bd4ee3e19a5828940041fdfdb

SHA1
2e3c7f0fd42dd48b014e82e9e5edf50664ae5698

SHA256
b326705c28abc9947182f84830e0e680d35551157b408a0f9cfd137279a02838

SHA512
4ba36b5e44c94df09b91b3557237dae6b74a9fe04da686f157938446cf635c464f616126e937400ee4d577708b3bdcb7f88cec8df23d344bfd7105b75f9ec7b0

Download Submit
C:\Users\Admin\AppData\Local\Temp\~9089149993456443795~\sg.tmp

Filesize
715KB

MD5
7c4718943bd3f66ebdb47ccca72c7b1e

SHA1
f9edfaa7adb8fa528b2e61b2b251f18da10a6969

SHA256
4cc32d00338fc7b206a7c052297acf9ac304ae7de9d61a2475a116959c1524fc

SHA512
e18c40d646fa4948f90f7471da55489df431f255041ebb6dcef86346f91078c9b27894e27216a4b2fe2a1c5e501c7953c77893cf696930123d28a322d49e1516

Download Submit
C:\Users\Admin\AppData\Local\Temp\~~4102952202833883920.tmp

Filesize
124B

MD5
8f9ad14882597398dcd7acba1d420d7f

SHA1
74c54aca8013aa654be6366208a35f2604937ca9

SHA256
a603e8465eaea49e7c6baf0c1a88fdbfcd7a40e9d338654ccfd214f21187b0a3

SHA512
633622298132f43ae2969284835d107c56f41bf774d52334654788abad3c5cf588046bb3b544f7bf1ce01ff78b8935b8989ecc3a599676e1a5398b7ad60ef685

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
221KB

MD5
e2b34ec017d44af92fcfeb6ec1442f5c

SHA1
1cc5e4c708417b9f148b98db95b9f0733ac60a3d

SHA256
986438d1af76d1a47409b9a7e25e9f0516d89320ad1e03468b04530b46aad9ba

SHA512
7d3e163ea3f3029498951385fa52f18a5e334ae263692e51d96cdd7e25624ddc9c21909f5c0eefaa2ff1845fc2d944c52ec95c619656fc1f60cdbf0c11888482

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

Filesize
9KB

MD5
523d5c39f9d8d2375c3df68251fa2249

SHA1
d4ed365c44bec9246fc1a65a32a7791792647a10

SHA256
20e3dc90a3e83b6202e2a7f4603b60e5e859639cb68693426c400b13aaeabd78

SHA512
526e1bba30d03f1ac177c6ab7409187a730969c429cebef15da68ffcf44b3b93227781eebc827b2f7a0fa17c391e00a0e532263fd0167aeaeb0456f96cfe3ae4

Download Submit
memory/220-63-0x0000000010000000-0x000000001002A000-memory.dmp

Filesize
168KB

Download
memory/220-56-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/220-57-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/220-61-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/220-55-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/892-26-0x0000000000400000-0x00000000009B4000-memory.dmp

Filesize
5.7MB

Download
memory/892-62-0x0000000000400000-0x00000000009B4000-memory.dmp

Filesize
5.7MB

Download
memory/1612-76-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/1612-74-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/1612-80-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/1612-75-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/1612-73-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/1612-72-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/3452-51-0x0000000000400000-0x00000000009B4000-memory.dmp

Filesize
5.7MB

Download
memory/3808-42-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/3808-43-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/3808-48-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/3808-44-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/3808-49-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads