fatalrat | 24b31819e09dd8eaa1c26a08c1a4e7ae55063c7ebb3dbd0273968d13a4f0d0e3

Analysis

max time kernel
146s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
02-12-2024 07:04

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

24b31819e09dd8eaa1c26a08c1a4e7ae55063c7ebb3dbd0273968d13a4f0d0e3.exe
Size

4.5MB
MD5

0b002ffd1ba0c617cfd6f25f75d8432e
SHA1

9a102e169744d9a28e575efecadc53b9d77fb751
SHA256

24b31819e09dd8eaa1c26a08c1a4e7ae55063c7ebb3dbd0273968d13a4f0d0e3
SHA512

52236ec4b8d3df89a7c60937c8d886ca05285cd77e639b731075368ef6bf80f973ae978d24123127d3785c8254f718c0556dc6b55be9355c4ac77bfb88f7172b
SSDEEP

49152:9YJMpJc32PMgJjQhGp7fOU3h1hyiTrMIx7Rtpb68N54+97boAXuE+OPnmr7DvjZd:9Og51Mgr/txTbV7+6W

Score

10^/10

fatalrat discovery infostealer rat

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
behavioral2/memory/4032-39-0x00000000026F0000-0x000000000271A000-memory.dmp	fatalrat

Drops startup file 2 IoCs

Processes:

b6VxgT.exe

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Macromedia-Packages.lnk	b6VxgT.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Macromedia-Packages.lnk	b6VxgT.exe

Executes dropped EXE 2 IoCs

Processes:

b6VxgT.exeb6VxgT.exe

pid	Process
4144	b6VxgT.exe
4032	b6VxgT.exe

Loads dropped DLL 1 IoCs

Processes:

b6VxgT.exe

pid	Process
4032	b6VxgT.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 2 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:

b6VxgT.exeb6VxgT.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b6VxgT.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b6VxgT.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:

b6VxgT.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	b6VxgT.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	b6VxgT.exe

Modifies data under HKEY_USERS 7 IoCs

Processes:

cmd.exe

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	cmd.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	cmd.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	cmd.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Shell Extensions\Cached	cmd.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Shell Extensions\Cached\{00021401-0000-0000-C000-000000000046} {000214E4-0000-0000-C000-000000000046} 0xFFFF = 0100000000000000db0684718844db01	cmd.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	cmd.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	cmd.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

24b31819e09dd8eaa1c26a08c1a4e7ae55063c7ebb3dbd0273968d13a4f0d0e3.exeb6VxgT.exe

pid	Process
4728	24b31819e09dd8eaa1c26a08c1a4e7ae55063c7ebb3dbd0273968d13a4f0d0e3.exe
4728	24b31819e09dd8eaa1c26a08c1a4e7ae55063c7ebb3dbd0273968d13a4f0d0e3.exe
4728	24b31819e09dd8eaa1c26a08c1a4e7ae55063c7ebb3dbd0273968d13a4f0d0e3.exe
4728	24b31819e09dd8eaa1c26a08c1a4e7ae55063c7ebb3dbd0273968d13a4f0d0e3.exe
4728	24b31819e09dd8eaa1c26a08c1a4e7ae55063c7ebb3dbd0273968d13a4f0d0e3.exe
4728	24b31819e09dd8eaa1c26a08c1a4e7ae55063c7ebb3dbd0273968d13a4f0d0e3.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe
4032	b6VxgT.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

b6VxgT.exe

description	pid	Process
Token: SeDebugPrivilege	4032	b6VxgT.exe
Token: SeDebugPrivilege	4032	b6VxgT.exe

Suspicious use of SetWindowsHookEx 6 IoCs

Processes:

wordpad.exeb6VxgT.exe

pid	Process
1140	wordpad.exe
1140	wordpad.exe
1140	wordpad.exe
1140	wordpad.exe
1140	wordpad.exe
4032	b6VxgT.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

24b31819e09dd8eaa1c26a08c1a4e7ae55063c7ebb3dbd0273968d13a4f0d0e3.exewrite.execmd.execmd.exe

description	pid	Process	procid_target
PID 4728 wrote to memory of 2404	4728	24b31819e09dd8eaa1c26a08c1a4e7ae55063c7ebb3dbd0273968d13a4f0d0e3.exe	91
PID 4728 wrote to memory of 2404	4728	24b31819e09dd8eaa1c26a08c1a4e7ae55063c7ebb3dbd0273968d13a4f0d0e3.exe	91
PID 2404 wrote to memory of 1140	2404	write.exe	93
PID 2404 wrote to memory of 1140	2404	write.exe	93
PID 4916 wrote to memory of 4144	4916	cmd.exe	94
PID 4916 wrote to memory of 4144	4916	cmd.exe	94
PID 4916 wrote to memory of 4144	4916	cmd.exe	94
PID 4728 wrote to memory of 2788	4728	24b31819e09dd8eaa1c26a08c1a4e7ae55063c7ebb3dbd0273968d13a4f0d0e3.exe	101
PID 4728 wrote to memory of 2788	4728	24b31819e09dd8eaa1c26a08c1a4e7ae55063c7ebb3dbd0273968d13a4f0d0e3.exe	101
PID 2788 wrote to memory of 4032	2788	cmd.exe	102
PID 2788 wrote to memory of 4032	2788	cmd.exe	102
PID 2788 wrote to memory of 4032	2788	cmd.exe	102

C:\Users\Admin\AppData\Local\Temp\24b31819e09dd8eaa1c26a08c1a4e7ae55063c7ebb3dbd0273968d13a4f0d0e3.exe
"C:\Users\Admin\AppData\Local\Temp\24b31819e09dd8eaa1c26a08c1a4e7ae55063c7ebb3dbd0273968d13a4f0d0e3.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4728
- C:\Windows\System32\write.exe
  "C:\Windows\System32\write.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2404
- - C:\Program Files\Windows NT\Accessories\wordpad.exe
    "C:\Program Files\Windows NT\Accessories\wordpad.exe"
    3⤵
    - Suspicious use of SetWindowsHookEx
    PID:1140
- C:\Windows\System32\cmd.exe
  cmd /c start "" "C:\ProgramData\b6VxgT\b6VxgT.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2788
- - C:\ProgramData\b6VxgT\b6VxgT.exe
    "C:\ProgramData\b6VxgT\b6VxgT.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:4032

C:\Windows\system32\cmd.exe
cmd /c start C:\Users\Admin\Desktop\b6Vx.lnk
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of WriteProcessMemory
PID:4916
- C:\Users\Admin\AppData\Roaming\b6VxgT.exe
  "C:\Users\Admin\AppData\Roaming\b6VxgT.exe" -n C:\Users\Admin\AppData\Roaming\b6Vxg.zip -d C:\Users\Admin\AppData\Roaming
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:4144

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc
1⤵
PID:4392

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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

Loading Replay Monitor...

Downloads

C:\ProgramData\b6VxgT\VEDecoder.dll

Filesize
1.6MB

MD5
d6a3fed112ab4e6bfe32cbe220dc225d

SHA1
bb9190ee490c46959e2bc192009f7773222dfa12

SHA256
8d89d4282f514acf2d7ef3ff7a618bbd513a84538ad309f2a48bff77c202bd58

SHA512
043b866e32db62bf8deb4ad9aa896b8274813cf1e6e4e575a3afc595893b5e5265a0430f6a1010c80db955114a0f9d9c3f4e0b3ee47b3323fb2bbcda5b6b7f61

Download Submit
C:\ProgramData\b6VxgT\b6VxgT.exe

Filesize
508KB

MD5
a79a2e0b7f299ab2f80ee8315679baee

SHA1
43d76adbcc19e4c8b60ffba419797a22b756e927

SHA256
0a804e7efe38d6eba358781597205519b936239e9daebcdf2f71c62c6a416f5c

SHA512
f246044eb82e2d4562081b0041ba2109cbda385b335b3bf10d3408acda6ae0c605ab1a522a7f5f363dfd6417e6825ff7d2831d42b8e4440d012fdf33ec605649

Download Submit
C:\ProgramData\b6VxgT\longlq.cl

Filesize
1.2MB

MD5
6652b3a6e7290de3f12a5f94b9b72b8c

SHA1
4702a4305f14c8437787343de339fa4f0a4b4d75

SHA256
946d9c70c3ae9d8b22530a844547494c60668a6a3b0cf4e25f84f03a0781743e

SHA512
38950c74297de0820ba606680ad74252dc0f8a4c9d46bdb73b903da55ab7b243a4ae7fa6812f026d2b4ec47b8000454e944be587cb788d592ab30d3848b77d34

Download Submit
C:\Users\Admin\AppData\Roaming\b6Vxg.zip

Filesize
653B

MD5
952fd5c98e668e93ae85657a20afdc6e

SHA1
cf2f42d33b6096255f01af9713e1b89cbe88bbb9

SHA256
6993e62c599201f2d2ac1b48ccd468b41ed1d032660f4aeb6d94f9631da2fad2

SHA512
ac5a37e01c74477c115b43259f1172e800420f447c7c3dd0c84cf0b06311d5ea5e229a79ccb785abd467c83106ea9676d8e6432a62a5561ba4e533b415d3b53d

Download Submit
C:\Users\Admin\AppData\Roaming\b6VxgT.exe

Filesize
105KB

MD5
6b8ebc942fe392c669b0b21bc8f83a03

SHA1
18fb9645a7365ae17b8386e47bec0b5ba6f5122f

SHA256
e5a35deff01c93f658ab8c4192570ad9ae5ffaa4f5f6d1b4db99f176bf5bdbe7

SHA512
0953d528c5d07b22fa0a969c98d569cf68e58450e1fc0179ddb2068cb4c429d23044a71005fd0daebe7e0c896c5a7598c5329e4c040be9099dfb1e62a2686589

Download Submit
C:\Users\Admin\Desktop\b6Vx.lnk

Filesize
948B

MD5
3bd51e2c73a52e1d17c37fd05c49514f

SHA1
6c4d3db6ee40298ebd75410b26968459f3fc112a

SHA256
b219079458b2f4099e8fc71e7b66ff75ef648b99e34dd564bd0f61c2e360634d

SHA512
2da27504300c28323d31be9b4229f2d448f369cb9cc4f63144792f06ed98e0354f518a7e7dcb2d683ac2ba4936ed924a042a5015b83461335601b7c8a27386c3

Download Submit
C:\Users\Admin\Desktop\b6Vx.lnk

Filesize
1KB

MD5
8d1832abc7fd38a773600206253e7598

SHA1
7683c40b2d573bd7ea829f0fc6f86ec56b25357c

SHA256
d2b5f1b0346e5ada428acffe8067bb07b8090a50647b026b4ce50828f6c7b3c5

SHA512
be97731104c1967beb5acd4dff5b7e03cba39a3599c624c8e39aa8692f35fa2d8038f9c128f5cd85de9191deba64b0a9dd81752e8707856f292beff3589a59d5

Download Submit
memory/4032-39-0x00000000026F0000-0x000000000271A000-memory.dmp

Filesize
168KB

Download
memory/4144-23-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/4728-0-0x00000000024E0000-0x00000000028C6000-memory.dmp

Filesize
3.9MB

Download
memory/4728-35-0x0000000000400000-0x0000000000890000-memory.dmp

Filesize
4.6MB

Download
memory/4728-36-0x00000000024E0000-0x00000000028C6000-memory.dmp

Filesize
3.9MB

Download