fatalrat | 7f39379d5a00823230db97e51a97994ba7eb7e653f70d5db7fdea809640bfbc0

Analysis

max time kernel
121s
max time network
162s
platform
windows7_x64
resource
win7-20231020-en
resource tags

arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
submitted
07-11-2023 15:01

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

7f39379d5a00823230db97e51a97994ba7eb7e653f70d5db7fdea809640bfbc0.exe
Size

532KB
MD5

19f228f2b03012748f224bb8bb7b4982
SHA1

410bb016e57d520928c90ebea855569ea3f2bd9d
SHA256

7f39379d5a00823230db97e51a97994ba7eb7e653f70d5db7fdea809640bfbc0
SHA512

8319cae9045714e508928391f331597a8e7531dd11874478fd5c1d7da68849f94695f84e9322f350b9d3ce936e4432f59e4abc195fddc16b12014a24dc6cc9b0
SSDEEP

12288:9ZrM7Q5qzwjlEMbT7RwwWKpPu7uLXZBmA1:z4k5ucEM/2wWYaepV

Score

10^/10

fatalrat evasion infostealer persistence rat upx

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

resource	yara_rule
behavioral1/memory/1052-90-0x0000000010000000-0x000000001002A000-memory.dmp	fatalrat

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	PTvrst.exe

Downloads MZ/PE file

Executes dropped EXE 3 IoCs

pid	Process
2988	PTvrst.exe
2916	spolsvt.exe
1052	spolsvt.exe

Identifies Wine through registry keys 2 TTPs 1 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2084844033-2744876406-2053742436-1000\Software\Wine	PTvrst.exe

Loads dropped DLL 2 IoCs

pid	Process
2988	PTvrst.exe
2916	spolsvt.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1028-0-0x0000000000400000-0x000000000057E000-memory.dmp	upx
behavioral1/memory/1028-13-0x0000000000400000-0x000000000057E000-memory.dmp	upx
behavioral1/memory/1028-14-0x0000000000400000-0x000000000057E000-memory.dmp	upx
behavioral1/memory/1028-103-0x0000000000400000-0x000000000057E000-memory.dmp	upx
behavioral1/memory/1028-108-0x0000000000400000-0x000000000057E000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Therecontinuous = "C:\\WINDOWS\\DNomb\\PTvrst.exe"	PTvrst.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\ÏµÍ³×é¼þ = "C:\\Users\\Public\\Documents\\123\\PTvrst.exe"	spolsvt.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2988	PTvrst.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2988 set thread context of 2916	2988	PTvrst.exe	31
PID 2916 set thread context of 1052	2916	spolsvt.exe	32

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\DNomb\spolsvt.exe	7f39379d5a00823230db97e51a97994ba7eb7e653f70d5db7fdea809640bfbc0.exe
File created	C:\Windows\DNomb\Mpec.mbt	7f39379d5a00823230db97e51a97994ba7eb7e653f70d5db7fdea809640bfbc0.exe
File opened for modification	C:\Windows\DNomb\Mpec.mbt	7f39379d5a00823230db97e51a97994ba7eb7e653f70d5db7fdea809640bfbc0.exe
File created	C:\Windows\DNomb\PTvrst.exe	7f39379d5a00823230db97e51a97994ba7eb7e653f70d5db7fdea809640bfbc0.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

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

pid	Process
1028	7f39379d5a00823230db97e51a97994ba7eb7e653f70d5db7fdea809640bfbc0.exe
1028	7f39379d5a00823230db97e51a97994ba7eb7e653f70d5db7fdea809640bfbc0.exe
1028	7f39379d5a00823230db97e51a97994ba7eb7e653f70d5db7fdea809640bfbc0.exe
1028	7f39379d5a00823230db97e51a97994ba7eb7e653f70d5db7fdea809640bfbc0.exe
1028	7f39379d5a00823230db97e51a97994ba7eb7e653f70d5db7fdea809640bfbc0.exe
1028	7f39379d5a00823230db97e51a97994ba7eb7e653f70d5db7fdea809640bfbc0.exe
1028	7f39379d5a00823230db97e51a97994ba7eb7e653f70d5db7fdea809640bfbc0.exe
1028	7f39379d5a00823230db97e51a97994ba7eb7e653f70d5db7fdea809640bfbc0.exe
2988	PTvrst.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
1052	spolsvt.exe
2916	spolsvt.exe
2916	spolsvt.exe
1028	7f39379d5a00823230db97e51a97994ba7eb7e653f70d5db7fdea809640bfbc0.exe
1028	7f39379d5a00823230db97e51a97994ba7eb7e653f70d5db7fdea809640bfbc0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1052	spolsvt.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
1028	7f39379d5a00823230db97e51a97994ba7eb7e653f70d5db7fdea809640bfbc0.exe
1028	7f39379d5a00823230db97e51a97994ba7eb7e653f70d5db7fdea809640bfbc0.exe
2988	PTvrst.exe
2988	PTvrst.exe
2916	spolsvt.exe
2916	spolsvt.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2988 wrote to memory of 2916	2988	PTvrst.exe	31
PID 2988 wrote to memory of 2916	2988	PTvrst.exe	31
PID 2988 wrote to memory of 2916	2988	PTvrst.exe	31
PID 2988 wrote to memory of 2916	2988	PTvrst.exe	31
PID 2988 wrote to memory of 2916	2988	PTvrst.exe	31
PID 2988 wrote to memory of 2916	2988	PTvrst.exe	31
PID 2988 wrote to memory of 2916	2988	PTvrst.exe	31
PID 2988 wrote to memory of 2916	2988	PTvrst.exe	31
PID 2988 wrote to memory of 2916	2988	PTvrst.exe	31
PID 2988 wrote to memory of 2916	2988	PTvrst.exe	31
PID 2988 wrote to memory of 2916	2988	PTvrst.exe	31
PID 2988 wrote to memory of 2916	2988	PTvrst.exe	31
PID 2988 wrote to memory of 2916	2988	PTvrst.exe	31
PID 2916 wrote to memory of 1052	2916	spolsvt.exe	32
PID 2916 wrote to memory of 1052	2916	spolsvt.exe	32
PID 2916 wrote to memory of 1052	2916	spolsvt.exe	32
PID 2916 wrote to memory of 1052	2916	spolsvt.exe	32
PID 2916 wrote to memory of 1052	2916	spolsvt.exe	32
PID 2916 wrote to memory of 1052	2916	spolsvt.exe	32
PID 2916 wrote to memory of 1052	2916	spolsvt.exe	32
PID 2916 wrote to memory of 1052	2916	spolsvt.exe	32
PID 2916 wrote to memory of 1052	2916	spolsvt.exe	32
PID 2916 wrote to memory of 1052	2916	spolsvt.exe	32
PID 2916 wrote to memory of 1052	2916	spolsvt.exe	32
PID 2916 wrote to memory of 1052	2916	spolsvt.exe	32

C:\Users\Admin\AppData\Local\Temp\7f39379d5a00823230db97e51a97994ba7eb7e653f70d5db7fdea809640bfbc0.exe
"C:\Users\Admin\AppData\Local\Temp\7f39379d5a00823230db97e51a97994ba7eb7e653f70d5db7fdea809640bfbc0.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:1028

C:\Users\Public\Documents\123\PTvrst.exe
"C:\Users\Public\Documents\123\PTvrst.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Executes dropped EXE
- Identifies Wine through registry keys
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2988
- C:\WINDOWS\DNomb\spolsvt.exe
  C:\WINDOWS\DNomb\spolsvt.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2916
- - C:\Users\Public\Documents\t\spolsvt.exe
    C:\Users\Public\Documents\t\spolsvt.exe
    3⤵
    - Executes dropped EXE
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1052

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

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Public\Documents\123\PTvrst.exe

Filesize
1.2MB

MD5
d22cfb5bfaeb1503b12b07e53ef0a149

SHA1
8ea2c85e363f551a159fabd65377affed4e417a1

SHA256
260464fb05210cfb30ef7a12d568f75eb781634b251d958cae8911948f6ca360

SHA512
151024cb2960b1ee485ded7ccbb753fe368a93fda5699af72e568667fa54bfb0d1732444e7b60efaab6d372204157cdb6abbf8862d0e89d612dd963342215e45

Download Submit
C:\Users\Public\Documents\123\PTvrst.exe

Filesize
1.2MB

MD5
d22cfb5bfaeb1503b12b07e53ef0a149

SHA1
8ea2c85e363f551a159fabd65377affed4e417a1

SHA256
260464fb05210cfb30ef7a12d568f75eb781634b251d958cae8911948f6ca360

SHA512
151024cb2960b1ee485ded7ccbb753fe368a93fda5699af72e568667fa54bfb0d1732444e7b60efaab6d372204157cdb6abbf8862d0e89d612dd963342215e45

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

Filesize
16KB

MD5
cdce4713e784ae069d73723034a957ff

SHA1
9a393a6bab6568f1a774fb753353223f11367e09

SHA256
b29e48102ecb3d3614e8980a8b8cc63dd2b993c6346f466479244ec2b47b69d8

SHA512
0a3a59a305cc2a6fad4e1315b0bcc5a4129595dfe1e8b703363fa02528d2d7c48d3fd22d365708be84a5557cf1916873df9563c454732f93f94a66e7e3b9fb0f

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

Filesize
16KB

MD5
cdce4713e784ae069d73723034a957ff

SHA1
9a393a6bab6568f1a774fb753353223f11367e09

SHA256
b29e48102ecb3d3614e8980a8b8cc63dd2b993c6346f466479244ec2b47b69d8

SHA512
0a3a59a305cc2a6fad4e1315b0bcc5a4129595dfe1e8b703363fa02528d2d7c48d3fd22d365708be84a5557cf1916873df9563c454732f93f94a66e7e3b9fb0f

Download Submit
C:\WINDOWS\DNomb\Mpec.mbt

Filesize
488KB

MD5
2574fda691d172cbc388ecf8519946b1

SHA1
b2026e000ba42db4339810a9cd6e166cbba0ffa0

SHA256
57dc57a72f09c0e9d9b3b98102fbcd2c7ff8f276b4f02832b300430bfebaa38c

SHA512
67c51cb0da666f2ec0810a0a27a8ca1c43a767f0d5a7b42474d383a1be926264645552af466393eb7a51ccd2d02033c3ddc7feb8f2d00a2db7a7f494e144ab1a

Download Submit
C:\WINDOWS\DNomb\spolsvt.exe

Filesize
9KB

MD5
523d5c39f9d8d2375c3df68251fa2249

SHA1
d4ed365c44bec9246fc1a65a32a7791792647a10

SHA256
20e3dc90a3e83b6202e2a7f4603b60e5e859639cb68693426c400b13aaeabd78

SHA512
526e1bba30d03f1ac177c6ab7409187a730969c429cebef15da68ffcf44b3b93227781eebc827b2f7a0fa17c391e00a0e532263fd0167aeaeb0456f96cfe3ae4

Download Submit
C:\Windows\DNomb\spolsvt.exe

Filesize
9KB

MD5
523d5c39f9d8d2375c3df68251fa2249

SHA1
d4ed365c44bec9246fc1a65a32a7791792647a10

SHA256
20e3dc90a3e83b6202e2a7f4603b60e5e859639cb68693426c400b13aaeabd78

SHA512
526e1bba30d03f1ac177c6ab7409187a730969c429cebef15da68ffcf44b3b93227781eebc827b2f7a0fa17c391e00a0e532263fd0167aeaeb0456f96cfe3ae4

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

Filesize
16KB

MD5
cdce4713e784ae069d73723034a957ff

SHA1
9a393a6bab6568f1a774fb753353223f11367e09

SHA256
b29e48102ecb3d3614e8980a8b8cc63dd2b993c6346f466479244ec2b47b69d8

SHA512
0a3a59a305cc2a6fad4e1315b0bcc5a4129595dfe1e8b703363fa02528d2d7c48d3fd22d365708be84a5557cf1916873df9563c454732f93f94a66e7e3b9fb0f

Download Submit
\Windows\DNomb\spolsvt.exe

Filesize
9KB

MD5
523d5c39f9d8d2375c3df68251fa2249

SHA1
d4ed365c44bec9246fc1a65a32a7791792647a10

SHA256
20e3dc90a3e83b6202e2a7f4603b60e5e859639cb68693426c400b13aaeabd78

SHA512
526e1bba30d03f1ac177c6ab7409187a730969c429cebef15da68ffcf44b3b93227781eebc827b2f7a0fa17c391e00a0e532263fd0167aeaeb0456f96cfe3ae4

Download Submit
memory/1028-108-0x0000000000400000-0x000000000057E000-memory.dmp

Filesize
1.5MB

Download
memory/1028-103-0x0000000000400000-0x000000000057E000-memory.dmp

Filesize
1.5MB

Download
memory/1028-14-0x0000000000400000-0x000000000057E000-memory.dmp

Filesize
1.5MB

Download
memory/1028-13-0x0000000000400000-0x000000000057E000-memory.dmp

Filesize
1.5MB

Download
memory/1028-0-0x0000000000400000-0x000000000057E000-memory.dmp

Filesize
1.5MB

Download
memory/1052-85-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1052-89-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1052-73-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1052-75-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1052-84-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1052-90-0x0000000010000000-0x000000001002A000-memory.dmp

Filesize
168KB

Download
memory/1052-80-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1052-77-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2916-60-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2916-56-0x0000000000400000-0x0000000000516000-memory.dmp

Filesize
1.1MB

Download
memory/2916-53-0x0000000000400000-0x0000000000516000-memory.dmp

Filesize
1.1MB

Download
memory/2916-50-0x0000000000400000-0x0000000000516000-memory.dmp

Filesize
1.1MB

Download
memory/2916-47-0x0000000000400000-0x0000000000516000-memory.dmp

Filesize
1.1MB

Download
memory/2916-45-0x0000000000400000-0x0000000000516000-memory.dmp

Filesize
1.1MB

Download
memory/2916-59-0x0000000000400000-0x0000000000516000-memory.dmp

Filesize
1.1MB

Download
memory/2916-64-0x0000000000400000-0x0000000000516000-memory.dmp

Filesize
1.1MB

Download
memory/2988-37-0x0000000004380000-0x0000000004381000-memory.dmp

Filesize
4KB

Download
memory/2988-44-0x00000000021F0000-0x00000000021F1000-memory.dmp

Filesize
4KB

Download
memory/2988-38-0x0000000000400000-0x00000000006A2000-memory.dmp

Filesize
2.6MB

Download
memory/2988-40-0x0000000004370000-0x0000000004371000-memory.dmp

Filesize
4KB

Download
memory/2988-39-0x0000000004290000-0x0000000004291000-memory.dmp

Filesize
4KB

Download
memory/2988-20-0x0000000004310000-0x0000000004311000-memory.dmp

Filesize
4KB

Download
memory/2988-21-0x00000000041D0000-0x00000000041D1000-memory.dmp

Filesize
4KB

Download
memory/2988-22-0x00000000042A0000-0x00000000042A1000-memory.dmp

Filesize
4KB

Download
memory/2988-23-0x0000000004270000-0x0000000004271000-memory.dmp

Filesize
4KB

Download
memory/2988-24-0x0000000004300000-0x0000000004301000-memory.dmp

Filesize
4KB

Download
memory/2988-25-0x00000000042F0000-0x00000000042F1000-memory.dmp

Filesize
4KB

Download
memory/2988-26-0x0000000004200000-0x0000000004201000-memory.dmp

Filesize
4KB

Download
memory/2988-27-0x00000000042E0000-0x00000000042E2000-memory.dmp

Filesize
8KB

Download
memory/2988-34-0x00000000021E0000-0x00000000021E1000-memory.dmp

Filesize
4KB

Download
memory/2988-35-0x00000000042C0000-0x00000000042C1000-memory.dmp

Filesize
4KB

Download
memory/2988-36-0x0000000004350000-0x0000000004351000-memory.dmp

Filesize
4KB

Download
memory/2988-29-0x0000000004070000-0x0000000004071000-memory.dmp

Filesize
4KB

Download
memory/2988-28-0x00000000041F0000-0x00000000041F1000-memory.dmp

Filesize
4KB

Download
memory/2988-31-0x00000000042D0000-0x00000000042D1000-memory.dmp

Filesize
4KB

Download
memory/2988-32-0x00000000042B0000-0x00000000042B1000-memory.dmp

Filesize
4KB

Download
memory/2988-30-0x0000000004280000-0x0000000004281000-memory.dmp

Filesize
4KB

Download
memory/2988-33-0x0000000004320000-0x0000000004321000-memory.dmp

Filesize
4KB

Download
memory/2988-99-0x0000000000400000-0x00000000006A2000-memory.dmp

Filesize
2.6MB

Download
memory/2988-18-0x0000000077190000-0x0000000077192000-memory.dmp

Filesize
8KB

Download
memory/2988-16-0x0000000000400000-0x00000000006A2000-memory.dmp

Filesize
2.6MB

Download