runningrat | cf6be26cbfc87fb85d345f97edd03ddc1f157c57fa3cd60da23a8cba71615842

General

Target
cf6be26cbfc87fb85d345f97edd03ddc1f157c57fa3cd60da23a8cba71615842.exe
Size 68KB
Sample220129-1pb1jaaff5
SHA256 cf6be26cbfc87fb85d345f97edd03ddc1f157c57fa3cd60da23a8cba71615842
MD5 bf130acead582841f356719dd6d29e98
SHA1 a0a4863bea2e364a5c5281a4f1a8b1361607b27a
SHA512 353cdb2d6874cbdb359eebdf7f10f09dd0edc5d6ca7b4e23edf80f039f7366b4e4ec735d396e5577dd7a46e6d9359a8ccf44dc31e5852683d98a270cbf24241b
MD5 SHA1 SHA512

Score

10^/10

runningrat persistence rat

Malware Config

Signatures

RunningRat
RunningRat is a remote access trojan first seen in 2018.
rat runningrat

RunningRat Payload 1 IoCs

resource	yara_rule
behavioral2/memory/3516-115-0x0000000010000000-0x000000001000F000-memory.dmp	family_runningrat

Executes dropped EXE 1 IoCs

pid	Process
4100	NETDLLDSL.exe

Sets DLL path for service in the registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\ini.ini	cf6be26cbfc87fb85d345f97edd03ddc1f157c57fa3cd60da23a8cba71615842.exe
File created	C:\Windows\SysWOW64\NETDLLDSL.exe	svchost.exe
File opened for modification	C:\Windows\SysWOW64\NETDLLDSL.exe	svchost.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\259366109.dll	cf6be26cbfc87fb85d345f97edd03ddc1f157c57fa3cd60da23a8cba71615842.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	NETDLLDSL.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	NETDLLDSL.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software	NETDLLDSL.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft	NETDLLDSL.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie	NETDLLDSL.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie\devenum\Version = "7"	NETDLLDSL.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie\devenum	NETDLLDSL.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3776 wrote to memory of 4100	3776	svchost.exe	70
PID 3776 wrote to memory of 4100	3776	svchost.exe	70
PID 3776 wrote to memory of 4100	3776	svchost.exe	70

C:\Users\Admin\AppData\Local\Temp\cf6be26cbfc87fb85d345f97edd03ddc1f157c57fa3cd60da23a8cba71615842.exe
"C:\Users\Admin\AppData\Local\Temp\cf6be26cbfc87fb85d345f97edd03ddc1f157c57fa3cd60da23a8cba71615842.exe"
1⤵
- Drops file in System32 directory
- Drops file in Windows directory
PID:3516

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k "NETDLLDSL"
1⤵
PID:3784

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k "NETDLLDSL"
1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:3776
- C:\Windows\SysWOW64\NETDLLDSL.exe
  C:\Windows\system32\NETDLLDSL.exe "c:\windows\259366109.dll",MainThread
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Modifies data under HKEY_USERS
  PID:4100

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/3516-115-0x0000000010000000-0x000000001000F000-memory.dmp

Download

memory/3516-118-0x0000000000580000-0x000000000058D000-memory.dmp