fatalrat | 8a184783ce65a3956db6367a6aa547a82bb431ce6cd5c82de772a9711febc1ac

General

Target

sterverexe.exe
Size

2.6MB
MD5

6bd5512a96b83249d901a839219d2b0a
SHA1

135782fae43c702daa401e2faaaf963f66e95d46
SHA256

a70fe514acbae5c180dbd53901ac1b9cfeab7d9c20b8c096eeb0fe124d3f28ca
SHA512

e78746312eb6b307a99566412d5de56e1fa0fa8d3eb760f7268eca36bc491f9dcbe86518d0399ffabd4f237b0461e4191f6c5cb77a2fcc2526b8f5ca901c9b2f
SSDEEP

49152:KnsHyjtk2MYC5GDbZnsHyjtk2MYC5GD+TncLwB/S5jSWIOva6DwmI7qmPV8WXTlh:Knsmtk2aaZnsmtk2apcL

Score

10^/10

fatalrat infostealer persistence rat

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
behavioral2/memory/3056-43-0x0000000010000000-0x000000001002A000-memory.dmp	fatalrat

Checks computer location settings 2 TTPs 4 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	._cache_sterverexe.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	._cache_Synaptics.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	sterverexe.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	Synaptics.exe

Executes dropped EXE 5 IoCs

pid	Process
3056	._cache_sterverexe.exe
1332	Synaptics.exe
3276	._cache_Synaptics.exe
2276	._cache_sterverexe.exe
540	._cache_Synaptics.exe

Adds Run key to start application 2 TTPs 3 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\Synaptics Pointing Device Driver = "C:\\ProgramData\\Synaptics\\Synaptics.exe"	sterverexe.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SVP7 = "C:\\Users\\Admin\\AppData\\Local\\._cache_sterverexe.exe"	._cache_sterverexe.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SVP7 = "C:\\Users\\Admin\\AppData\\Local\\._cache_Synaptics.exe"	._cache_Synaptics.exe

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

System Information Discovery
T1082

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	sterverexe.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	Synaptics.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3056	._cache_sterverexe.exe
Token: SeDebugPrivilege	3276	._cache_Synaptics.exe
Token: SeDebugPrivilege	2276	._cache_sterverexe.exe
Token: SeDebugPrivilege	540	._cache_Synaptics.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1668 wrote to memory of 3056	1668	sterverexe.exe	80
PID 1668 wrote to memory of 3056	1668	sterverexe.exe	80
PID 1668 wrote to memory of 3056	1668	sterverexe.exe	80
PID 1668 wrote to memory of 1332	1668	sterverexe.exe	81
PID 1668 wrote to memory of 1332	1668	sterverexe.exe	81
PID 1668 wrote to memory of 1332	1668	sterverexe.exe	81
PID 1332 wrote to memory of 3276	1332	Synaptics.exe	82
PID 1332 wrote to memory of 3276	1332	Synaptics.exe	82
PID 1332 wrote to memory of 3276	1332	Synaptics.exe	82
PID 3056 wrote to memory of 2276	3056	._cache_sterverexe.exe	90
PID 3056 wrote to memory of 2276	3056	._cache_sterverexe.exe	90
PID 3056 wrote to memory of 2276	3056	._cache_sterverexe.exe	90
PID 3276 wrote to memory of 540	3276	._cache_Synaptics.exe	91
PID 3276 wrote to memory of 540	3276	._cache_Synaptics.exe	91
PID 3276 wrote to memory of 540	3276	._cache_Synaptics.exe	91

C:\Users\Admin\AppData\Local\Temp\sterverexe.exe
"C:\Users\Admin\AppData\Local\Temp\sterverexe.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1668
- C:\Users\Admin\AppData\Local\Temp\._cache_sterverexe.exe
  "C:\Users\Admin\AppData\Local\Temp\._cache_sterverexe.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3056
- - C:\Users\Admin\AppData\Local\._cache_sterverexe.exe
    "C:\Users\Admin\AppData\Local\._cache_sterverexe.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2276
- C:\ProgramData\Synaptics\Synaptics.exe
  "C:\ProgramData\Synaptics\Synaptics.exe" InjUpdate
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1332
- - C:\Users\Admin\AppData\Local\Temp\._cache_Synaptics.exe
    "C:\Users\Admin\AppData\Local\Temp\._cache_Synaptics.exe" InjUpdate
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3276
  - - C:\Users\Admin\AppData\Local\._cache_Synaptics.exe
      "C:\Users\Admin\AppData\Local\._cache_Synaptics.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      PID:540

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

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\Synaptics\Synaptics.exe

Filesize
2.6MB

MD5
6bd5512a96b83249d901a839219d2b0a

SHA1
135782fae43c702daa401e2faaaf963f66e95d46

SHA256
a70fe514acbae5c180dbd53901ac1b9cfeab7d9c20b8c096eeb0fe124d3f28ca

SHA512
e78746312eb6b307a99566412d5de56e1fa0fa8d3eb760f7268eca36bc491f9dcbe86518d0399ffabd4f237b0461e4191f6c5cb77a2fcc2526b8f5ca901c9b2f

Download Submit
C:\Users\Admin\AppData\Local\Temp\._cache_sterverexe.exe

Filesize
192KB

MD5
7c8d0f0df1f11b55991502a51dece2f3

SHA1
6b71fd7070d4411dfe81df3c8b6f7f6f3e1a45b5

SHA256
88feba24748c14a3b285e4add02391fb2a34c9eb714710cb7b64df6ec4d99017

SHA512
2cba88017529b4cdc4837794479b44d2e0691015516007eaa094f41fdeb506171dfaeab2c0b18e93189edc2ea5ff2daeef948c22ba279418e7c83c605c5fbdc1

Download Submit
memory/1332-107-0x0000000002300000-0x0000000002301000-memory.dmp

Filesize
4KB

Download
memory/1332-146-0x0000000000400000-0x000000000069F000-memory.dmp

Filesize
2.6MB

Download
memory/1332-176-0x0000000002300000-0x0000000002301000-memory.dmp

Filesize
4KB

Download
memory/1332-193-0x0000000000400000-0x000000000069F000-memory.dmp

Filesize
2.6MB

Download
memory/1332-200-0x0000000000400000-0x000000000069F000-memory.dmp

Filesize
2.6MB

Download
memory/1668-0-0x00000000022F0000-0x00000000022F1000-memory.dmp

Filesize
4KB

Download
memory/1668-105-0x0000000000400000-0x000000000069F000-memory.dmp

Filesize
2.6MB

Download
memory/3056-43-0x0000000010000000-0x000000001002A000-memory.dmp

Filesize
168KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads