fatalrat | e57a8d682aa0a7821d791f13f52fd5567f2dd38d4e64f7eba8d98544549d62c6

General

Target

win32-quickq_1.exe
Size

98.2MB
MD5

b8dea70bf788929e2129e066c9c1d401
SHA1

7403aa225eed41dc69dfad368db97685fbc9eb1c
SHA256

e57a8d682aa0a7821d791f13f52fd5567f2dd38d4e64f7eba8d98544549d62c6
SHA512

a4497706a62dc6cd39c3e0a9f7d78fb18fe3b542bcc17e5848ecf92f3dd4a798ed700e90775c12025987a91dcfcff333a5e165f2fb111b4d85b8790a5594eb28
SSDEEP

3145728:48qC2GLfwe8O2YxkkCa+w0SPh5BU7xaszy:rPpnxKJwdJCasu

Score

10^/10

fatalrat aspackv2 discovery evasion infostealer persistence rat trojan upx

Malware Config

Signatures

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

Fatal Rat payload 1 IoCs

rat infostealer

Processes:

resource	yara_rule
behavioral1/memory/2840-75-0x0000000010000000-0x0000000010029000-memory.dmp	fatalrat

ASPack v2.12-2.42 1 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

Processes:

resource	yara_rule
\Program Files (x86)\u1.exe	aspack_v212_v242

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

2364 cmd.exe
Executes dropped EXE 5 IoCs

Processes:

u1.exeQTalk.exespolsvt.exespolsvt.exesvcoth.exe

pid process

1820 u1.exe
2240 QTalk.exe
2800 spolsvt.exe
2840 spolsvt.exe
2676 svcoth.exe
Loads dropped DLL 8 IoCs

Processes:

win32-quickq_1.exeu1.exeQTalk.exespolsvt.exe

pid process

2388 win32-quickq_1.exe
1820 u1.exe
2240 QTalk.exe
2240 QTalk.exe
2800 spolsvt.exe
2800 spolsvt.exe
2800 spolsvt.exe
2800 spolsvt.exe

pid	process
2364	cmd.exe

pid	process
2388	win32-quickq_1.exe
1820	u1.exe
2240	QTalk.exe
2240	QTalk.exe
2800	spolsvt.exe
2800	spolsvt.exe
2800	spolsvt.exe
2800	spolsvt.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

u1.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Çý¶¯ÈËÉú = "C:\\Users\\Public\\Documents\\sougou\\PTvrst.exe"	u1.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

u1.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA u1.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	u1.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

QTalk.exespolsvt.exe

description	pid	process	target process
PID 2240 set thread context of 2800	2240	QTalk.exe	spolsvt.exe
PID 2800 set thread context of 2840	2800	spolsvt.exe	spolsvt.exe
PID 2800 set thread context of 2676	2800	spolsvt.exe	svcoth.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral1/memory/2388-0-0x0000000000400000-0x00000000004AB000-memory.dmp	upx
behavioral1/memory/2388-115-0x0000000000400000-0x00000000004AB000-memory.dmp	upx

Drops file in Program Files directory 4 IoCs

Processes:

win32-quickq_1.exe

description	ioc	process
File created	C:\Program Files (x86)\u1.exe	win32-quickq_1.exe
File opened for modification	C:\Program Files (x86)\u1.exe	win32-quickq_1.exe
File created	C:\Program Files (x86)\win32-quickq.exe	win32-quickq_1.exe
File opened for modification	C:\Program Files (x86)\win32-quickq.exe	win32-quickq_1.exe

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.exeu1.exeQTalk.exespolsvt.exespolsvt.exesvcoth.execmd.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	u1.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 56 IoCs

Processes:

u1.exespolsvt.exe

pid	process
1820	u1.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe
2840	spolsvt.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

spolsvt.exe

description pid process

Token: SeDebugPrivilege 2840 spolsvt.exe
Suspicious use of SetWindowsHookEx 5 IoCs

Processes:

u1.exeQTalk.exespolsvt.exe

pid process

1820 u1.exe
1820 u1.exe
2240 QTalk.exe
2240 QTalk.exe
2800 spolsvt.exe

description	pid	process
Token: SeDebugPrivilege	2840	spolsvt.exe

Suspicious use of WriteProcessMemory 41 IoCs

Processes:

win32-quickq_1.exeu1.exeQTalk.exespolsvt.exe

description	pid	process	target process
PID 2388 wrote to memory of 1820	2388	win32-quickq_1.exe	u1.exe
PID 2388 wrote to memory of 1820	2388	win32-quickq_1.exe	u1.exe
PID 2388 wrote to memory of 1820	2388	win32-quickq_1.exe	u1.exe
PID 2388 wrote to memory of 1820	2388	win32-quickq_1.exe	u1.exe
PID 1820 wrote to memory of 2240	1820	u1.exe	QTalk.exe
PID 1820 wrote to memory of 2240	1820	u1.exe	QTalk.exe
PID 1820 wrote to memory of 2240	1820	u1.exe	QTalk.exe
PID 1820 wrote to memory of 2240	1820	u1.exe	QTalk.exe
PID 2240 wrote to memory of 2800	2240	QTalk.exe	spolsvt.exe
PID 2240 wrote to memory of 2800	2240	QTalk.exe	spolsvt.exe
PID 2240 wrote to memory of 2800	2240	QTalk.exe	spolsvt.exe
PID 2240 wrote to memory of 2800	2240	QTalk.exe	spolsvt.exe
PID 2240 wrote to memory of 2800	2240	QTalk.exe	spolsvt.exe
PID 2240 wrote to memory of 2800	2240	QTalk.exe	spolsvt.exe
PID 2240 wrote to memory of 2800	2240	QTalk.exe	spolsvt.exe
PID 2240 wrote to memory of 2800	2240	QTalk.exe	spolsvt.exe
PID 2240 wrote to memory of 2800	2240	QTalk.exe	spolsvt.exe
PID 2800 wrote to memory of 2840	2800	spolsvt.exe	spolsvt.exe
PID 2800 wrote to memory of 2840	2800	spolsvt.exe	spolsvt.exe
PID 2800 wrote to memory of 2840	2800	spolsvt.exe	spolsvt.exe
PID 2800 wrote to memory of 2840	2800	spolsvt.exe	spolsvt.exe
PID 2800 wrote to memory of 2840	2800	spolsvt.exe	spolsvt.exe
PID 2800 wrote to memory of 2840	2800	spolsvt.exe	spolsvt.exe
PID 2800 wrote to memory of 2840	2800	spolsvt.exe	spolsvt.exe
PID 2800 wrote to memory of 2840	2800	spolsvt.exe	spolsvt.exe
PID 2800 wrote to memory of 2840	2800	spolsvt.exe	spolsvt.exe
PID 2800 wrote to memory of 2676	2800	spolsvt.exe	svcoth.exe
PID 2800 wrote to memory of 2676	2800	spolsvt.exe	svcoth.exe
PID 2800 wrote to memory of 2676	2800	spolsvt.exe	svcoth.exe
PID 2800 wrote to memory of 2676	2800	spolsvt.exe	svcoth.exe
PID 2800 wrote to memory of 2676	2800	spolsvt.exe	svcoth.exe
PID 2800 wrote to memory of 2676	2800	spolsvt.exe	svcoth.exe
PID 2800 wrote to memory of 2676	2800	spolsvt.exe	svcoth.exe
PID 2800 wrote to memory of 2676	2800	spolsvt.exe	svcoth.exe
PID 2800 wrote to memory of 2676	2800	spolsvt.exe	svcoth.exe
PID 2800 wrote to memory of 2676	2800	spolsvt.exe	svcoth.exe
PID 2800 wrote to memory of 2676	2800	spolsvt.exe	svcoth.exe
PID 2388 wrote to memory of 2364	2388	win32-quickq_1.exe	cmd.exe
PID 2388 wrote to memory of 2364	2388	win32-quickq_1.exe	cmd.exe
PID 2388 wrote to memory of 2364	2388	win32-quickq_1.exe	cmd.exe
PID 2388 wrote to memory of 2364	2388	win32-quickq_1.exe	cmd.exe

C:\Users\Admin\AppData\Local\Temp\win32-quickq_1.exe
"C:\Users\Admin\AppData\Local\Temp\win32-quickq_1.exe"
1⤵
- Loads dropped DLL
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2388
- C:\Program Files (x86)\u1.exe
  "C:\Program Files (x86)\u1.exe"
  2⤵
  - Executes dropped EXE
  - 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:1820
- - 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
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2240
  - - C:\Users\Public\Documents\sougou\spolsvt.exe
      C:\Users\Public\Documents\sougou\spolsvt.exe
      4⤵
      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:2800
    - - 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:2840
    - - 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:2676
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\7ZSfx000.cmd" "
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2364

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\7ZSfx000.cmd

Filesize
200B

MD5
b328abad928aff55a0639c53d55435b4

SHA1
b87ab9e5433122e0ac1a9b43110264caec98ac68

SHA256
41b6e385c4ec964f7975d02186c83ab4eadb62fc4b80aad28e0f15d2ea7b9740

SHA512
a503861224097ccb8f2802c2869acbe45f48b8fd6f8cbe93e8a3097de11a81f4917e61e99398038059ee94fbbc9d3adac95fa48c0b75f705463d0da794b3d2a5

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
\Program Files (x86)\u1.exe

Filesize
3.4MB

MD5
37e0b13e0b6f991db932f0920a63da57

SHA1
013956f4312da803ee7145e44b16c40faaa0a6d5

SHA256
05f77365e284df754cba4ebcd3d6af41c673194dfc7a2375bacce90b9795ff0e

SHA512
a17a65ea4c635afae2c737e40a07af4a8266b98321d96c5577ceede0f95dc435ffebf70e3a31f377ce9300b0bf95bb7a45a6561e68cf09ee03225628c9c48a8b

Download Submit
memory/1820-54-0x0000000000400000-0x00000000009E9000-memory.dmp

Filesize
5.9MB

Download
memory/1820-11-0x0000000000400000-0x00000000009E9000-memory.dmp

Filesize
5.9MB

Download
memory/1820-13-0x0000000000400000-0x00000000009E9000-memory.dmp

Filesize
5.9MB

Download
memory/1820-14-0x0000000000400000-0x00000000009E9000-memory.dmp

Filesize
5.9MB

Download
memory/1820-24-0x0000000002550000-0x0000000002B39000-memory.dmp

Filesize
5.9MB

Download
memory/1820-15-0x0000000000401000-0x00000000004A1000-memory.dmp

Filesize
640KB

Download
memory/1820-12-0x0000000000400000-0x00000000009E9000-memory.dmp

Filesize
5.9MB

Download
memory/2240-30-0x0000000000400000-0x00000000009E9000-memory.dmp

Filesize
5.9MB

Download
memory/2240-52-0x0000000000400000-0x00000000009E9000-memory.dmp

Filesize
5.9MB

Download
memory/2240-26-0x0000000000400000-0x00000000009E9000-memory.dmp

Filesize
5.9MB

Download
memory/2388-0-0x0000000000400000-0x00000000004AB000-memory.dmp

Filesize
684KB

Download
memory/2388-115-0x0000000000400000-0x00000000004AB000-memory.dmp

Filesize
684KB

Download
memory/2388-10-0x0000000002970000-0x0000000002F59000-memory.dmp

Filesize
5.9MB

Download
memory/2676-96-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2676-94-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2676-100-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2676-104-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2676-98-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2676-92-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2676-91-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2676-90-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2800-35-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/2800-39-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/2800-46-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2800-45-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/2800-42-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/2800-50-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/2800-37-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/2840-71-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2840-75-0x0000000010000000-0x0000000010029000-memory.dmp

Filesize
164KB

Download
memory/2840-64-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2840-65-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2840-68-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2840-70-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2840-74-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2840-66-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads