runningrat | bbe31a4ecad08a0cd9d895fcb01f6d2353d6e3a69a76c6d25ca0365eac810884 | Triage

Analysis

max time kernel
120s
max time network
126s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
24/04/2024, 12:11 UTC

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General

Target

me.exe
Size

68KB
MD5

56ebc5ff9dece63f071cb0632a7cf43b
SHA1

50373327e5aee1719f7d7ba1387a2ac67abc7111
SHA256

bbe31a4ecad08a0cd9d895fcb01f6d2353d6e3a69a76c6d25ca0365eac810884
SHA512

d73b5399baf7ad66b00eea5c601a8aeb1d3900a9b345ede09796eb732be556e5b79a7dbd587fa7939e4986828a6846c782f9908dda528d0bc1d9d9fb6e0d5d39
SSDEEP

768:BCB8S+OR7dOahyoHokBtqN74W7bZZmYb9PyzcjRlYlwa6NVdkPnJJMI5V:BHJaAoHoc2x7bZoYBAcQlwJdMJ

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
behavioral1/memory/2172-0-0x0000000010000000-0x000000001000F000-memory.dmp	family_runningrat

Sets DLL path for service in the registry 2 TTPs 1 IoCs

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\NETRUSDDL\Parameters\ServiceDll = "C:\\Windows\\system32\\259426246.dll"	me.exe

Executes dropped EXE 1 IoCs

pid	Process
2616	NETRUSDDL.exe

Loads dropped DLL 7 IoCs

pid	Process
2172	me.exe
1396	svchost.exe
1396	svchost.exe
2616	NETRUSDDL.exe
2616	NETRUSDDL.exe
2616	NETRUSDDL.exe
2616	NETRUSDDL.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\259426246.dll	me.exe
File opened for modification	C:\Windows\SysWOW64\ini.ini	me.exe
File created	C:\Windows\SysWOW64\NETRUSDDL.exe	svchost.exe
File opened for modification	C:\Windows\SysWOW64\NETRUSDDL.exe	svchost.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

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

Modifies data under HKEY_USERS 6 IoCs

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

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1396 wrote to memory of 2616	1396	svchost.exe	30
PID 1396 wrote to memory of 2616	1396	svchost.exe	30
PID 1396 wrote to memory of 2616	1396	svchost.exe	30
PID 1396 wrote to memory of 2616	1396	svchost.exe	30

C:\Users\Admin\AppData\Local\Temp\me.exe
"C:\Users\Admin\AppData\Local\Temp\me.exe"
1⤵
- Sets DLL path for service in the registry
- Loads dropped DLL
- Drops file in System32 directory
PID:2172

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k "NETRUSDDL"
1⤵
PID:2680

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k "NETRUSDDL"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:1396
- C:\Windows\SysWOW64\NETRUSDDL.exe
  C:\Windows\system32\NETRUSDDL.exe "c:\windows\system32\259426246.dll",MainThread
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks processor information in registry
  - Modifies data under HKEY_USERS
  PID:2616

Network

DNS

s.skybad.top

NETRUSDDL.exe

Remote address:

8.8.8.8:53

Request

s.skybad.top

IN A

Response

s.skybad.top

IN A

20.11.26.62

20.11.26.62:3010

s.skybad.top

NETRUSDDL.exe

805 B
204 B
7
4

8.8.8.8:53

s.skybad.top

dns

NETRUSDDL.exe

58 B
74 B
1
1

DNS Request

s.skybad.top

DNS Response

20.11.26.62

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

Registry Run Keys / Startup Folder

Privilege Escalation

Boot or Logon Autostart Execution

Registry Run Keys / Startup Folder

Defense Evasion

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\ini.ini

Filesize
44B

MD5
42eb1927177517b8ee02c588838a9b08

SHA1
47262879bf7343594e67561238bd4bd6606cbae4

SHA256
5b844b4d1f2d4a950042c16f1152fab2df6b3f72fda9e9c2074d44c7769a9bdc

SHA512
327cf5c092f50972b0818c201e8b83f7a1281e48222458c7eb2e94cc95669eb5a4035ce9ea596c730a3c451fd3c65a4866068f80c6d2bbec9a1949a7a76fa6cc

Download Submit
\Windows\SysWOW64\259426246.dll

Filesize
37KB

MD5
7bdc29d57a52275c0faa6f6eb45c0bf8

SHA1
c61e1f666a60a01372eba3afce206974f3c982e5

SHA256
9a64da96ee8428d28ab3c036eb87a23894ee8de62fe0d8a0a17ae61d9ea5df00

SHA512
6d3b1e6dd20060f97dcc89e7b964efb09bace1ff9a70c384b52ccc8afd66d4c0c1452e6741af1221fa1595798457aa3d282e3d913f8354dd6f270e1af9c36b04

Download Submit
\Windows\SysWOW64\NETRUSDDL.exe

Filesize
43KB

MD5
51138beea3e2c21ec44d0932c71762a8

SHA1
8939cf35447b22dd2c6e6f443446acc1bf986d58

SHA256
5ad3c37e6f2b9db3ee8b5aeedc474645de90c66e3d95f8620c48102f1eba4124

SHA512
794f30fe452117ff2a26dc9d7086aaf82b639c2632ac2e381a81f5239caaec7c96922ba5d2d90bfd8d74f0a6cd4f79fbda63e14c6b779e5cf6834c13e4e45e7d

Download Submit
memory/2172-0-0x0000000010000000-0x000000001000F000-memory.dmp

Filesize
60KB

Download
memory/2172-6-0x0000000000250000-0x000000000025D000-memory.dmp

Filesize
52KB

Download