Malware Analysis Report

2024-09-11 09:57

Sample ID 240517-nwjyhafg9x
Target WinRAR.exe
SHA256 47415dc54f54a881e0fdd0c02c26b994cf881af13f849428153ae4e42bc12ed6
Tags
limerat rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

47415dc54f54a881e0fdd0c02c26b994cf881af13f849428153ae4e42bc12ed6

Threat Level: Known bad

The file WinRAR.exe was found to be: Known bad.

Malicious Activity Summary

limerat rat

Limerat family

LimeRAT

Checks computer location settings

Executes dropped EXE

Loads dropped DLL

Legitimate hosting services abused for malware hosting/C2

Enumerates physical storage devices

Unsigned PE

Creates scheduled task(s)

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Scheduled Task/Job
T1053
Persistence
TA0003
Scheduled Task/Job
T1053
Privilege Escalation
TA0004
Scheduled Task/Job
T1053
Defense Evasion
TA0005
Credential Access
TA0006
Discovery
TA0007
System Information Discovery
T1082
Query Registry
T1012
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Web Service
T1102
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-05-17 11:44

Signatures

Limerat family

limerat

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-17 11:44

Reported

2024-05-17 11:47

Platform

win7-20240508-en

Max time kernel

132s

Max time network

141s

Command Line

"C:\Users\Admin\AppData\Local\Temp\WinRAR.exe"

Signatures

LimeRAT

rat limerat

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\System\WinRAR.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinRAR.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\WinRAR.exe N/A

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A pastebin.com N/A N/A
N/A pastebin.com N/A N/A

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\System\WinRAR.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\System\WinRAR.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 308 wrote to memory of 2744 N/A C:\Users\Admin\AppData\Local\Temp\WinRAR.exe C:\Windows\SysWOW64\schtasks.exe
PID 308 wrote to memory of 2744 N/A C:\Users\Admin\AppData\Local\Temp\WinRAR.exe C:\Windows\SysWOW64\schtasks.exe
PID 308 wrote to memory of 2744 N/A C:\Users\Admin\AppData\Local\Temp\WinRAR.exe C:\Windows\SysWOW64\schtasks.exe
PID 308 wrote to memory of 2744 N/A C:\Users\Admin\AppData\Local\Temp\WinRAR.exe C:\Windows\SysWOW64\schtasks.exe
PID 308 wrote to memory of 2636 N/A C:\Users\Admin\AppData\Local\Temp\WinRAR.exe C:\Users\Admin\AppData\Roaming\System\WinRAR.exe
PID 308 wrote to memory of 2636 N/A C:\Users\Admin\AppData\Local\Temp\WinRAR.exe C:\Users\Admin\AppData\Roaming\System\WinRAR.exe
PID 308 wrote to memory of 2636 N/A C:\Users\Admin\AppData\Local\Temp\WinRAR.exe C:\Users\Admin\AppData\Roaming\System\WinRAR.exe
PID 308 wrote to memory of 2636 N/A C:\Users\Admin\AppData\Local\Temp\WinRAR.exe C:\Users\Admin\AppData\Roaming\System\WinRAR.exe

Processes

C:\Users\Admin\AppData\Local\Temp\WinRAR.exe

"C:\Users\Admin\AppData\Local\Temp\WinRAR.exe"

C:\Windows\SysWOW64\schtasks.exe

schtasks /create /f /sc ONLOGON /RL HIGHEST /tn LimeRAT-Admin /tr "'C:\Users\Admin\AppData\Roaming\System\WinRAR.exe'"

C:\Users\Admin\AppData\Roaming\System\WinRAR.exe

"C:\Users\Admin\AppData\Roaming\System\WinRAR.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 pastebin.com udp
US 172.67.19.24:443 pastebin.com tcp
N/A 192.168.254.187:53 tcp
N/A 192.168.254.187:53 tcp
N/A 192.168.254.187:53 tcp
N/A 192.168.254.187:53 tcp
N/A 192.168.254.187:53 tcp
N/A 192.168.254.187:53 tcp

Files

memory/308-0-0x0000000074B3E000-0x0000000074B3F000-memory.dmp

memory/308-1-0x0000000000FC0000-0x0000000000FCC000-memory.dmp

\Users\Admin\AppData\Roaming\System\WinRAR.exe

MD5 1bb96e140f557472fc121bd147c7fef2
SHA1 f1dca9840d4619ed536c733e618f301748041f82
SHA256 47415dc54f54a881e0fdd0c02c26b994cf881af13f849428153ae4e42bc12ed6
SHA512 8611b8a6a4eae862d412de1e13047b36cd9854bad75b1e8224a820f91630977908c9e560326da8a538dab097cf51b9407ed17a6050535df6ce98e8bd68b4a48d

memory/2636-12-0x0000000000350000-0x000000000035C000-memory.dmp

memory/308-13-0x0000000074B30000-0x000000007521E000-memory.dmp

memory/2636-14-0x0000000074B30000-0x000000007521E000-memory.dmp

memory/2636-15-0x0000000074B30000-0x000000007521E000-memory.dmp

memory/2636-16-0x0000000074B30000-0x000000007521E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-17 11:44

Reported

2024-05-17 11:47

Platform

win10v2004-20240508-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\WinRAR.exe"

Signatures

LimeRAT

rat limerat

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\WinRAR.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\System\WinRAR.exe N/A

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A pastebin.com N/A N/A
N/A pastebin.com N/A N/A

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\System\WinRAR.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\System\WinRAR.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1988 wrote to memory of 3228 N/A C:\Users\Admin\AppData\Local\Temp\WinRAR.exe C:\Windows\SysWOW64\schtasks.exe
PID 1988 wrote to memory of 3228 N/A C:\Users\Admin\AppData\Local\Temp\WinRAR.exe C:\Windows\SysWOW64\schtasks.exe
PID 1988 wrote to memory of 3228 N/A C:\Users\Admin\AppData\Local\Temp\WinRAR.exe C:\Windows\SysWOW64\schtasks.exe
PID 1988 wrote to memory of 976 N/A C:\Users\Admin\AppData\Local\Temp\WinRAR.exe C:\Users\Admin\AppData\Roaming\System\WinRAR.exe
PID 1988 wrote to memory of 976 N/A C:\Users\Admin\AppData\Local\Temp\WinRAR.exe C:\Users\Admin\AppData\Roaming\System\WinRAR.exe
PID 1988 wrote to memory of 976 N/A C:\Users\Admin\AppData\Local\Temp\WinRAR.exe C:\Users\Admin\AppData\Roaming\System\WinRAR.exe

Processes

C:\Users\Admin\AppData\Local\Temp\WinRAR.exe

"C:\Users\Admin\AppData\Local\Temp\WinRAR.exe"

C:\Windows\SysWOW64\schtasks.exe

schtasks /create /f /sc ONLOGON /RL HIGHEST /tn LimeRAT-Admin /tr "'C:\Users\Admin\AppData\Roaming\System\WinRAR.exe'"

C:\Users\Admin\AppData\Roaming\System\WinRAR.exe

"C:\Users\Admin\AppData\Roaming\System\WinRAR.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 25.24.18.2.in-addr.arpa udp
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
NL 23.62.61.137:443 www.bing.com tcp
US 8.8.8.8:53 137.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 pastebin.com udp
US 172.67.19.24:443 pastebin.com tcp
N/A 192.168.254.187:53 tcp
US 8.8.8.8:53 24.19.67.172.in-addr.arpa udp
NL 52.142.223.178:80 tcp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
N/A 192.168.254.187:53 tcp
N/A 192.168.254.187:53 tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
N/A 192.168.254.187:53 tcp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
N/A 192.168.254.187:53 tcp
N/A 192.168.254.187:53 tcp
US 8.8.8.8:53 93.65.42.20.in-addr.arpa udp

Files

memory/1988-0-0x000000007484E000-0x000000007484F000-memory.dmp

memory/1988-1-0x0000000000020000-0x000000000002C000-memory.dmp

memory/1988-2-0x0000000004A20000-0x0000000004ABC000-memory.dmp

memory/1988-3-0x0000000004AC0000-0x0000000004B26000-memory.dmp

memory/1988-4-0x0000000074840000-0x0000000074FF0000-memory.dmp

memory/1988-5-0x00000000056A0000-0x0000000005C44000-memory.dmp

C:\Users\Admin\AppData\Roaming\System\WinRAR.exe

MD5 1bb96e140f557472fc121bd147c7fef2
SHA1 f1dca9840d4619ed536c733e618f301748041f82
SHA256 47415dc54f54a881e0fdd0c02c26b994cf881af13f849428153ae4e42bc12ed6
SHA512 8611b8a6a4eae862d412de1e13047b36cd9854bad75b1e8224a820f91630977908c9e560326da8a538dab097cf51b9407ed17a6050535df6ce98e8bd68b4a48d

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\WinRAR.exe.log

MD5 8a1197be130e48aa5aeeafd43eb6bb9f
SHA1 cb790c7c216e41524348eaa0e5b74926e78dbfc6
SHA256 547474087ec8f71dfd32b76f9b74c86f9844addf5082df37562a2c2c0cae4bfb
SHA512 4ad9d8dbbc253c8d7b1c2b4ec5f115c770f02bdbbc21ca0b422e251a3a98331e169c5062cabf7da81d5ae0d295b3778ef105ef82709df1a4ace71be288b8f166

memory/1988-16-0x0000000074840000-0x0000000074FF0000-memory.dmp

memory/976-17-0x0000000074840000-0x0000000074FF0000-memory.dmp

memory/976-18-0x0000000074840000-0x0000000074FF0000-memory.dmp

memory/976-19-0x0000000074840000-0x0000000074FF0000-memory.dmp