runningrat | b10884a495070c2f9ee183bbbb6d1b8f7351fc75d094f4bb212c38c859a6e867

General

Target

me.exe
Size

68KB
MD5

04485ee0f0313f990255aa4a06546abb
SHA1

fa87b9a7b914c11fb75b775e391a3ad46d4eb432
SHA256

b10884a495070c2f9ee183bbbb6d1b8f7351fc75d094f4bb212c38c859a6e867
SHA512

d95011d0bbae4c63ab0acf26568d0759990f26ed87dbc60ed01fdb840477519adb931feff6a6029c0b32d4ba4623ef2951ca260fcfabc609b364f51f775f024b
SSDEEP

768:BCB8S+OR7dOahyoHokBtqN74W7bZZmYb9PyzcjRlYlwa6NVdkPnJJMI4V:BHJaAoHoc2x7bZoYBAcQlwJdME

Score

10^/10

runningrat discovery persistence rat

Malware Config

Extracted

Family

runningrat

Signatures

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

RunningRat payload 1 IoCs

resource	yara_rule
behavioral2/memory/4820-1-0x0000000010000000-0x000000001000F000-memory.dmp	family_runningrat

Runningrat family
runningrat

Server Software Component: Terminal Services DLL 1 TTPs 1 IoCs

persistence

Terminal Services DLL

T1505.005

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\NETSYSDDL\Parameters\ServiceDll = "C:\\Windows\\system32\\240626437.dll"	me.exe

Executes dropped EXE 1 IoCs

pid	Process
2468	NETSYSDDL.exe

Loads dropped DLL 4 IoCs

pid	Process
4820	me.exe
4820	me.exe
3688	svchost.exe
2468	NETSYSDDL.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\240626437.dll	me.exe
File opened for modification	C:\Windows\SysWOW64\ini.ini	me.exe
File created	C:\Windows\SysWOW64\NETSYSDDL.exe	svchost.exe
File opened for modification	C:\Windows\SysWOW64\NETSYSDDL.exe	svchost.exe

System Location Discovery: System Language Discovery 1 TTPs 3 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	me.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	NETSYSDDL.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	NETSYSDDL.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	NETSYSDDL.exe

Modifies data under HKEY_USERS 5 IoCs

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

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3688 wrote to memory of 2468	3688	svchost.exe	96
PID 3688 wrote to memory of 2468	3688	svchost.exe	96
PID 3688 wrote to memory of 2468	3688	svchost.exe	96

C:\Users\Admin\AppData\Local\Temp\me.exe
"C:\Users\Admin\AppData\Local\Temp\me.exe"
1⤵
- Server Software Component: Terminal Services DLL
- Loads dropped DLL
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
PID:4820

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k "NETSYSDDL"
1⤵
PID:3276

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k "NETSYSDDL"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3688
- C:\Windows\SysWOW64\NETSYSDDL.exe
  C:\Windows\system32\NETSYSDDL.exe "c:\windows\system32\240626437.dll",MainThread
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Modifies data under HKEY_USERS
  PID:2468

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Server Software Component

1

T1505

Terminal Services DLL

1

T1505.005

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\240626437.dll

Filesize
37KB

MD5
8aa7b4bea7fdb2be4e55653a66f2a571

SHA1
1176c7d9a1212dd6f7859385582378c0d435c906

SHA256
2748749a30129f7bdf0f29147fb4dcebe19942d9dadd425c900faa5c0efe2ee3

SHA512
dc0c97d74da87f37867eb66258e049d5cbd64396880a0e587b75086f7f106a2388ec0fd93133480da819d1308c2c4553e966fe49e99d6cffa30cdac0283b986b

Download Submit
C:\Windows\SysWOW64\NETSYSDDL.exe

Filesize
60KB

MD5
889b99c52a60dd49227c5e485a016679

SHA1
8fa889e456aa646a4d0a4349977430ce5fa5e2d7

SHA256
6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910

SHA512
08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641

Download Submit
C:\Windows\SysWOW64\ini.ini

Filesize
44B

MD5
1de46e06331c92fc4370f7019eaed8bd

SHA1
524ab017351337c4344adf0d8b37d1a753af8039

SHA256
c5dbbc9a98229831162e34fed510139827c35dbc9b2067c39d0c9f5385d33570

SHA512
6a06fdffd6a523d7e868eac7985e385d73ee4943721a4cb3c2ef07e134a3a0dfc5ea24bdd28ff705cdfaecae4961f35597626e1763d8357aa6b6455cfd3a30f5

Download Submit
memory/4820-1-0x0000000010000000-0x000000001000F000-memory.dmp

Filesize
60KB

Download
memory/4820-8-0x0000000000550000-0x000000000055D000-memory.dmp

Filesize
52KB

Download

Analysis

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