fatalrat | 42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
13-09-2024 19:55

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General

Target

42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
Size

11.0MB
MD5

f3912f8a1495fc0372931b6bb77d0906
SHA1

5371fd9aa587ef833b152b895870d346c5113d3f
SHA256

42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3
SHA512

31ea2a07fa16beba63702237a07603eeda122d2f85fc7197e875c954204f510bd7a9f70978424c56d1ef4f7ac14d764d850c7a1504b5985f2154a12169373b90
SSDEEP

196608:wtkBOgSWQdTEsAVwwBpMXF9xxAZle/7GpCFb58bKBe2dsltmvlCxqWPzlbVB0Qef:wtKORTDAnM3U8/+CFbKGB5KtmvlCxlP6

Score

10^/10

fatalrat discovery infostealer persistence rat upx vmprotect

Malware Config

Signatures

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

Fatal Rat payload 4 IoCs

rat infostealer

Processes:

resource	yara_rule
behavioral2/memory/4104-16366-0x0000000010000000-0x000000001002A000-memory.dmp	fatalrat
behavioral2/memory/4104-16382-0x0000000000400000-0x00000000004F8000-memory.dmp	fatalrat
behavioral2/memory/16968-29459-0x0000000010000000-0x000000001002A000-memory.dmp	fatalrat
behavioral2/memory/16968-29465-0x0000000000400000-0x00000000004F8000-memory.dmp	fatalrat

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

sevchost.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	sevchost.exe

Executes dropped EXE 3 IoCs

Processes:

sevchost.exesevchost.exesevchost.exe

pid	Process
5088	sevchost.exe
4104	sevchost.exe
16968	sevchost.exe

Loads dropped DLL 1 IoCs

Processes:

42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe

pid	Process
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe

UPX packed file 1 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3464-19-0x0000000003F80000-0x0000000003FA6000-memory.dmp	upx

VMProtect packed file 8 IoCs

Detects executables packed with VMProtect commercial packer.

vmprotect

Processes:

resource	yara_rule
behavioral2/memory/3464-11-0x0000000000400000-0x0000000001DEA000-memory.dmp	vmprotect
behavioral2/memory/3464-12-0x0000000000400000-0x0000000001DEA000-memory.dmp	vmprotect
behavioral2/memory/3464-13-0x0000000000400000-0x0000000001DEA000-memory.dmp	vmprotect
behavioral2/memory/3464-25-0x0000000000400000-0x0000000001DEA000-memory.dmp	vmprotect
behavioral2/memory/3464-11945-0x0000000000400000-0x0000000001DEA000-memory.dmp	vmprotect
behavioral2/memory/3464-16374-0x0000000000400000-0x0000000001DEA000-memory.dmp	vmprotect
behavioral2/memory/3464-18531-0x0000000000400000-0x0000000001DEA000-memory.dmp	vmprotect
behavioral2/memory/3464-24157-0x0000000000400000-0x0000000001DEA000-memory.dmp	vmprotect

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

sevchost.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SVP7 = "C:\\Users\\Admin\\AppData\\Local\\sevchost.exe"	sevchost.exe

Enumerates connected drives 3 TTPs 1 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe

description	ioc	Process
File opened (read-only)	\??\E:	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 37 IoCs

Processes:

sevchost.exesevchost.exe

pid	Process
4104	sevchost.exe
4104	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.exe
16968	sevchost.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 4 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:

42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exesevchost.exesevchost.exesevchost.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sevchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sevchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sevchost.exe

Suspicious behavior: EnumeratesProcesses 28 IoCs

Processes:

42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe

pid	Process
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

sevchost.exesevchost.exe

description	pid	Process
Token: SeDebugPrivilege	4104	sevchost.exe
Token: SeDebugPrivilege	16968	sevchost.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe

pid	Process
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exesevchost.exe

description	pid	Process	procid_target
PID 3464 wrote to memory of 5088	3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe	86
PID 3464 wrote to memory of 5088	3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe	86
PID 3464 wrote to memory of 5088	3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe	86
PID 3464 wrote to memory of 4104	3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe	89
PID 3464 wrote to memory of 4104	3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe	89
PID 3464 wrote to memory of 4104	3464	42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe	89
PID 4104 wrote to memory of 16968	4104	sevchost.exe	90
PID 4104 wrote to memory of 16968	4104	sevchost.exe	90
PID 4104 wrote to memory of 16968	4104	sevchost.exe	90

C:\Users\Admin\AppData\Local\Temp\42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe
"C:\Users\Admin\AppData\Local\Temp\42d3f739021157d43f5608db253455463b6d8cc1150d2a7baf81f038a31650c3.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3464
- C:\Users\Admin\AppData\Local\Temp\sevchost.exe
  C:\Users\Admin\AppData\Local\Temp\\sevchost.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:5088
- C:\Users\Admin\Documents\sevchost.exe
  C:\Users\Admin\Documents\\sevchost.exe
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4104
- - C:\Users\Admin\AppData\Local\sevchost.exe
    "C:\Users\Admin\AppData\Local\sevchost.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:16968

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

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\sevchost.exe

Filesize
908KB

MD5
8390ee2fd97cde38668ab3cf59efa7eb

SHA1
596911c48f40c00e494abc04f603f2a3244b25e7

SHA256
5bbab49b432fc0fb0e4874116b896e4aaae495bb35bad16424e2ac7c67ba1159

SHA512
5c4cd607203f9028b3bc1b0c69dd8e2dc4e52c989fb5a764f6d43364bd055644a1c19b106d8bb207d76b2dd287e9564df63cd9ea0d29c4f9ea51d96dfa3df1c8

Download Submit
C:\Users\Admin\Documents\CCStudio\HpSocket4C.dll

Filesize
2.8MB

MD5
4bc970a97300b1a725d44bba23d8697a

SHA1
6f1eb181153692814e038e2f851d0734646f78f8

SHA256
c9d8fb5311ae6018dc1ca72774cb7efeba5c115c827a5cfb795b3580499e323d

SHA512
03968ca876b7e584de0a1418cca1dd2036fd0b4744f86d69aee5691a42061e284f8d9577293ef3f656be332f7da5ca276f85c6393bd6d8eb7de181baec0285f8

Download Submit
memory/3464-13-0x0000000000400000-0x0000000001DEA000-memory.dmp

Filesize
25.9MB

Download
memory/3464-3-0x0000000002400000-0x0000000002401000-memory.dmp

Filesize
4KB

Download
memory/3464-6-0x0000000000D5C000-0x00000000012EC000-memory.dmp

Filesize
5.6MB

Download
memory/3464-5-0x0000000002420000-0x0000000002421000-memory.dmp

Filesize
4KB

Download
memory/3464-4-0x0000000002410000-0x0000000002411000-memory.dmp

Filesize
4KB

Download
memory/3464-2-0x00000000023D0000-0x00000000023D1000-memory.dmp

Filesize
4KB

Download
memory/3464-11-0x0000000000400000-0x0000000001DEA000-memory.dmp

Filesize
25.9MB

Download
memory/3464-12-0x0000000000400000-0x0000000001DEA000-memory.dmp

Filesize
25.9MB

Download
memory/3464-1-0x00000000023C0000-0x00000000023C1000-memory.dmp

Filesize
4KB

Download
memory/3464-7-0x0000000002430000-0x0000000002431000-memory.dmp

Filesize
4KB

Download
memory/3464-19-0x0000000003F80000-0x0000000003FA6000-memory.dmp

Filesize
152KB

Download
memory/3464-0-0x0000000001E90000-0x0000000001E91000-memory.dmp

Filesize
4KB

Download
memory/3464-25-0x0000000000400000-0x0000000001DEA000-memory.dmp

Filesize
25.9MB

Download
memory/3464-24157-0x0000000000400000-0x0000000001DEA000-memory.dmp

Filesize
25.9MB

Download
memory/3464-24320-0x0000000000D5C000-0x00000000012EC000-memory.dmp

Filesize
5.6MB

Download
memory/3464-18531-0x0000000000400000-0x0000000001DEA000-memory.dmp

Filesize
25.9MB

Download
memory/3464-16374-0x0000000000400000-0x0000000001DEA000-memory.dmp

Filesize
25.9MB

Download
memory/3464-11945-0x0000000000400000-0x0000000001DEA000-memory.dmp

Filesize
25.9MB

Download
memory/4104-9176-0x0000000075900000-0x000000007597A000-memory.dmp

Filesize
488KB

Download
memory/4104-16365-0x0000000000400000-0x00000000004F8000-memory.dmp

Filesize
992KB

Download
memory/4104-16363-0x0000000000400000-0x00000000004F8000-memory.dmp

Filesize
992KB

Download
memory/4104-16362-0x0000000000400000-0x00000000004F8000-memory.dmp

Filesize
992KB

Download
memory/4104-16366-0x0000000010000000-0x000000001002A000-memory.dmp

Filesize
168KB

Download
memory/4104-3292-0x0000000075FC0000-0x00000000761D5000-memory.dmp

Filesize
2.1MB

Download
memory/4104-16382-0x0000000000400000-0x00000000004F8000-memory.dmp

Filesize
992KB

Download
memory/4104-1232-0x0000000000400000-0x00000000004F8000-memory.dmp

Filesize
992KB

Download
memory/4104-7167-0x0000000076790000-0x0000000076930000-memory.dmp

Filesize
1.6MB

Download
memory/5088-27-0x0000000075FC0000-0x00000000761D5000-memory.dmp

Filesize
2.1MB

Download
memory/5088-29472-0x0000000000400000-0x00000000004F8000-memory.dmp

Filesize
992KB

Download
memory/5088-26-0x0000000000400000-0x00000000004F8000-memory.dmp

Filesize
992KB

Download
memory/16968-22268-0x0000000075900000-0x000000007597A000-memory.dmp

Filesize
488KB

Download
memory/16968-20259-0x0000000076790000-0x0000000076930000-memory.dmp

Filesize
1.6MB

Download
memory/16968-29458-0x0000000000400000-0x00000000004F8000-memory.dmp

Filesize
992KB

Download
memory/16968-29456-0x0000000000400000-0x00000000004F8000-memory.dmp

Filesize
992KB

Download
memory/16968-29455-0x0000000000400000-0x00000000004F8000-memory.dmp

Filesize
992KB

Download
memory/16968-29464-0x00000000006B0000-0x00000000006B1000-memory.dmp

Filesize
4KB

Download
memory/16968-29459-0x0000000010000000-0x000000001002A000-memory.dmp

Filesize
168KB

Download
memory/16968-29465-0x0000000000400000-0x00000000004F8000-memory.dmp

Filesize
992KB

Download
memory/16968-16384-0x0000000075FC0000-0x00000000761D5000-memory.dmp

Filesize
2.1MB

Download