fatalrat | 8795836a86dc61f9fe1d4b3f798ebf3a4c1900ddac2f207f4d1f46e87b85850f

Analysis

max time kernel
150s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
21-05-2022 11:58

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General

Target

EduCefWarper.dll
Size

1.1MB
MD5

55c32cb9a881b49bcc0d1b36868a3e98
SHA1

e0d623b55e5e307540d05a55fadc323d9615d3b2
SHA256

8795836a86dc61f9fe1d4b3f798ebf3a4c1900ddac2f207f4d1f46e87b85850f
SHA512

dba66ec3002d7f08bc17c63b34028775d5d9dde7c0c3cd0778e120aba0a273ed130924954a23fcdbbcac4c10c76c991712895ff971979a9a865632bb659e0414

Score

10^/10

fatalrat infostealer persistence rat suricata

Malware Config

Signatures

FatalRat
FatalRat is a modular infostealer family written in C++ first appearing in June 2021.
infostealer rat fatalrat
suricata: ET MALWARE FatalRAT CnC Activity
suricata: ET MALWARE FatalRAT CnC Activity
suricata

Fatal Rat Payload 2 IoCs

rat infostealer

resource	yara_rule
behavioral2/memory/4200-1484-0x0000000001540000-0x000000000155D000-memory.dmp	fatalrat
behavioral2/memory/4200-1485-0x0000000010000000-0x00000000100E7000-memory.dmp	fatalrat

Executes dropped EXE 1 IoCs

pid	Process
4200	ApplicationFrame.exe

Sets service image path in registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112

Loads dropped DLL 1 IoCs

pid	Process
4200	ApplicationFrame.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\software\WOW6432Node\microsoft\windows\CurrentVersion\Run	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Éù¿¨Çý¶¯ = "C:\\Windows\\SysWOW64\\rundll32.exe"	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ = "C:\\Users\\Public\\Downloads\\Tencente\\YYDS\\ApplicationFrame.exe"	ApplicationFrame.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\TestDriver.sys	rundll32.exe
File created	C:\Windows\SysWOW64\AAscit.exe	rundll32.exe
File created	C:\Windows\SysWOW64\Perl510.dll	rundll32.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
4200	ApplicationFrame.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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	ApplicationFrame.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	ApplicationFrame.exe

Modifies data under HKEY_USERS 1 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\@%SystemRoot%\system32\hnetcfgclient.dll,-201 = "HNetCfg Client"	svchost.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4324	rundll32.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe
4200	ApplicationFrame.exe

Suspicious behavior: LoadsDriver 4 IoCs

pid	Process
664	Process not Found
664	Process not Found
664	Process not Found
664	Process not Found

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeShutdownPrivilege	216	svchost.exe
Token: SeCreatePagefilePrivilege	216	svchost.exe
Token: SeLoadDriverPrivilege	4420	svchost.exe
Token: SeLoadDriverPrivilege	4420	svchost.exe
Token: SeDebugPrivilege	4200	ApplicationFrame.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4532 wrote to memory of 4324	4532	rundll32.exe	83
PID 4532 wrote to memory of 4324	4532	rundll32.exe	83
PID 4532 wrote to memory of 4324	4532	rundll32.exe	83
PID 4324 wrote to memory of 4200	4324	rundll32.exe	88
PID 4324 wrote to memory of 4200	4324	rundll32.exe	88
PID 4324 wrote to memory of 4200	4324	rundll32.exe	88

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\EduCefWarper.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4532
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\EduCefWarper.dll,#1
  2⤵
  - Adds Run key to start application
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4324
- - C:\Users\Public\Downloads\Tencente\YYDS\ApplicationFrame.exe
    C:\Users\Public\Downloads\Tencente\YYDS\ApplicationFrame.exe
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Adds Run key to start application
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4200

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s Netman
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:4420

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k netsvcs -p -s NetSetupSvc
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:216

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Public\Downloads\Tencente\YYDS\ApplicationFrame.exe

Filesize
44KB

MD5
8b7741a2ae1664d9f1e45c3db481d896

SHA1
e841741c443fab28c4370e1404106c104e0b139b

SHA256
3b79bc26d722162b14619636e96efe06f9586da5fad9d7673555be99bf194e82

SHA512
4ec159948450af0d2deab7bb9f4ea6e83503b1f61d4322c6dbef90f0fb7a101158886712124862c8f52c73eb9928b6028ea01608b7a19269c28bd7b1876ae5cc

Download Submit
C:\Users\Public\Downloads\Tencente\YYDS\ApplicationFrame.exe

Filesize
44KB

MD5
8b7741a2ae1664d9f1e45c3db481d896

SHA1
e841741c443fab28c4370e1404106c104e0b139b

SHA256
3b79bc26d722162b14619636e96efe06f9586da5fad9d7673555be99bf194e82

SHA512
4ec159948450af0d2deab7bb9f4ea6e83503b1f61d4322c6dbef90f0fb7a101158886712124862c8f52c73eb9928b6028ea01608b7a19269c28bd7b1876ae5cc

Download Submit
C:\Users\Public\Downloads\Tencente\YYDS\Perl510.dll

Filesize
924KB

MD5
dbf8b9ab8ae650d5b452240c0e9c90df

SHA1
1215872c6f7306d6ba14133eb706483f04445885

SHA256
9c7feb98fb5804f1f80dd03db1f84a06b68ea6043d2d34ab53edce82b83827b2

SHA512
f9ab16d7946f4dfab4abbe368d6863dbaa1e0c49b6b051ff44eecdf0053ee0d1204272b08ffc925d76335874ca1099ebebc84ba80be3aa9c9bd5e5007a62d3a9

Download Submit
C:\Users\Public\Downloads\Tencente\YYDS\perl510.dll

Filesize
924KB

MD5
dbf8b9ab8ae650d5b452240c0e9c90df

SHA1
1215872c6f7306d6ba14133eb706483f04445885

SHA256
9c7feb98fb5804f1f80dd03db1f84a06b68ea6043d2d34ab53edce82b83827b2

SHA512
f9ab16d7946f4dfab4abbe368d6863dbaa1e0c49b6b051ff44eecdf0053ee0d1204272b08ffc925d76335874ca1099ebebc84ba80be3aa9c9bd5e5007a62d3a9

Download Submit
memory/4200-136-0x00000000777E0000-0x0000000077983000-memory.dmp

Filesize
1.6MB

Download
memory/4200-137-0x00000000769C0000-0x0000000076BD5000-memory.dmp

Filesize
2.1MB

Download
memory/4200-139-0x0000000075900000-0x0000000075AA0000-memory.dmp

Filesize
1.6MB

Download
memory/4200-140-0x0000000075FF0000-0x000000007606A000-memory.dmp

Filesize
488KB

Download
memory/4200-1484-0x0000000001540000-0x000000000155D000-memory.dmp

Filesize
116KB

Download
memory/4200-1485-0x0000000010000000-0x00000000100E7000-memory.dmp

Filesize
924KB

Download
memory/4200-1486-0x00000000052D0000-0x00000000053D0000-memory.dmp

Filesize
1024KB

Download