Malware Analysis Report

2024-11-16 13:09

Sample ID 220609-fx5ycsaae5
Target 160054467ff97cc397fce9eddc6ce8a27d24320d45ccb3a8c8ba2a28ccbc6b79
SHA256 160054467ff97cc397fce9eddc6ce8a27d24320d45ccb3a8c8ba2a28ccbc6b79
Tags
limerat evasion rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

160054467ff97cc397fce9eddc6ce8a27d24320d45ccb3a8c8ba2a28ccbc6b79

Threat Level: Known bad

The file 160054467ff97cc397fce9eddc6ce8a27d24320d45ccb3a8c8ba2a28ccbc6b79 was found to be: Known bad.

Malicious Activity Summary

limerat evasion rat

LimeRAT

Looks for VirtualBox Guest Additions in registry

Looks for VMWare Tools registry key

Checks computer location settings

Checks BIOS information in registry

Maps connected drives based on registry

Legitimate hosting services abused for malware hosting/C2

Suspicious use of SetThreadContext

Drops file in Windows directory

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Creates scheduled task(s)

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-06-09 05:16

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-06-09 05:16

Reported

2022-06-09 09:45

Platform

win7-20220414-en

Max time kernel

151s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\160054467ff97cc397fce9eddc6ce8a27d24320d45ccb3a8c8ba2a28ccbc6b79.exe"

Signatures

LimeRAT

rat limerat

Looks for VirtualBox Guest Additions in registry

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Oracle\VirtualBox Guest Additions C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe N/A

Looks for VMWare Tools registry key

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\VMware, Inc.\VMware Tools C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe N/A

Checks BIOS information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe N/A

Legitimate hosting services abused for malware hosting/C2

Maps connected drives based on registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0 C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1112 set thread context of 1672 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\debug\WIA\yNsxbmDzw.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe N/A
File opened for modification C:\Windows\debug\WIA\yNsxbmDzw.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe 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 behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1532 wrote to memory of 1112 N/A C:\Users\Admin\AppData\Local\Temp\160054467ff97cc397fce9eddc6ce8a27d24320d45ccb3a8c8ba2a28ccbc6b79.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 1532 wrote to memory of 1112 N/A C:\Users\Admin\AppData\Local\Temp\160054467ff97cc397fce9eddc6ce8a27d24320d45ccb3a8c8ba2a28ccbc6b79.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 1532 wrote to memory of 1112 N/A C:\Users\Admin\AppData\Local\Temp\160054467ff97cc397fce9eddc6ce8a27d24320d45ccb3a8c8ba2a28ccbc6b79.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 1532 wrote to memory of 1112 N/A C:\Users\Admin\AppData\Local\Temp\160054467ff97cc397fce9eddc6ce8a27d24320d45ccb3a8c8ba2a28ccbc6b79.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 1532 wrote to memory of 1112 N/A C:\Users\Admin\AppData\Local\Temp\160054467ff97cc397fce9eddc6ce8a27d24320d45ccb3a8c8ba2a28ccbc6b79.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 1532 wrote to memory of 1112 N/A C:\Users\Admin\AppData\Local\Temp\160054467ff97cc397fce9eddc6ce8a27d24320d45ccb3a8c8ba2a28ccbc6b79.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 1532 wrote to memory of 1112 N/A C:\Users\Admin\AppData\Local\Temp\160054467ff97cc397fce9eddc6ce8a27d24320d45ccb3a8c8ba2a28ccbc6b79.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 1112 wrote to memory of 760 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\SysWOW64\schtasks.exe
PID 1112 wrote to memory of 760 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\SysWOW64\schtasks.exe
PID 1112 wrote to memory of 760 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\SysWOW64\schtasks.exe
PID 1112 wrote to memory of 760 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\SysWOW64\schtasks.exe
PID 1112 wrote to memory of 1672 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1112 wrote to memory of 1672 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1112 wrote to memory of 1672 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1112 wrote to memory of 1672 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1112 wrote to memory of 1672 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1112 wrote to memory of 1672 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1112 wrote to memory of 1672 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1112 wrote to memory of 1672 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1112 wrote to memory of 1672 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1112 wrote to memory of 1672 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1112 wrote to memory of 1672 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Processes

C:\Users\Admin\AppData\Local\Temp\160054467ff97cc397fce9eddc6ce8a27d24320d45ccb3a8c8ba2a28ccbc6b79.exe

"C:\Users\Admin\AppData\Local\Temp\160054467ff97cc397fce9eddc6ce8a27d24320d45ccb3a8c8ba2a28ccbc6b79.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe" /logtoconsole=false /logfile= /u "C:\Users\Admin\AppData\Local\Temp\160054467ff97cc397fce9eddc6ce8a27d24320d45ccb3a8c8ba2a28ccbc6b79.exe"

C:\Windows\SysWOW64\schtasks.exe

"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\yNsxbmDzw" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE84D.tmp"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 pastebin.com udp
US 172.67.34.170:80 pastebin.com tcp
US 172.67.34.170:443 pastebin.com tcp
US 185.133.193.254:1337 tcp

Files

memory/1532-54-0x0000000000890000-0x000000000091A000-memory.dmp

memory/1532-55-0x0000000076241000-0x0000000076243000-memory.dmp

memory/1112-56-0x0000000000000000-mapping.dmp

memory/1112-57-0x0000000000220000-0x000000000022C000-memory.dmp

memory/1112-58-0x00000000020A0000-0x000000000212A000-memory.dmp

memory/1112-60-0x0000000000580000-0x0000000000596000-memory.dmp

memory/760-61-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Local\Temp\tmpE84D.tmp

MD5 e4c5f37beaf2ee2abaa82492efbccd41
SHA1 e78eb09f6b071a2035050b1754ca9e15c6ffd292
SHA256 4dc5fa5c393c5f2ed51a625500827cd7e6e91680e171b137e5b283298daa99b3
SHA512 e2a33feb6df7cd9946c455df5b00a4b18a28cb51e11414b54bf23a990d3e4472442a93b77e9b5a25667be093ea0d134d9fb5246e0c0da7524e60b21d14143a5c

memory/1672-64-0x0000000000400000-0x000000000040C000-memory.dmp

memory/1672-63-0x0000000000400000-0x000000000040C000-memory.dmp

memory/1672-66-0x0000000000400000-0x000000000040C000-memory.dmp

memory/1672-67-0x0000000000400000-0x000000000040C000-memory.dmp

memory/1672-68-0x0000000000408D9E-mapping.dmp

memory/1672-70-0x0000000000400000-0x000000000040C000-memory.dmp

memory/1672-72-0x0000000000400000-0x000000000040C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-06-09 05:16

Reported

2022-06-09 09:45

Platform

win10v2004-20220414-en

Max time kernel

146s

Max time network

164s

Command Line

"C:\Users\Admin\AppData\Local\Temp\160054467ff97cc397fce9eddc6ce8a27d24320d45ccb3a8c8ba2a28ccbc6b79.exe"

Signatures

LimeRAT

rat limerat

Looks for VirtualBox Guest Additions in registry

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Oracle\VirtualBox Guest Additions C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe N/A

Looks for VMWare Tools registry key

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\VMware, Inc.\VMware Tools C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe N/A

Checks BIOS information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\160054467ff97cc397fce9eddc6ce8a27d24320d45ccb3a8c8ba2a28ccbc6b79.exe N/A

Legitimate hosting services abused for malware hosting/C2

Maps connected drives based on registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0 C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1336 set thread context of 3824 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

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 behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3036 wrote to memory of 1336 N/A C:\Users\Admin\AppData\Local\Temp\160054467ff97cc397fce9eddc6ce8a27d24320d45ccb3a8c8ba2a28ccbc6b79.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 3036 wrote to memory of 1336 N/A C:\Users\Admin\AppData\Local\Temp\160054467ff97cc397fce9eddc6ce8a27d24320d45ccb3a8c8ba2a28ccbc6b79.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 3036 wrote to memory of 1336 N/A C:\Users\Admin\AppData\Local\Temp\160054467ff97cc397fce9eddc6ce8a27d24320d45ccb3a8c8ba2a28ccbc6b79.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 1336 wrote to memory of 4652 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\SysWOW64\schtasks.exe
PID 1336 wrote to memory of 4652 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\SysWOW64\schtasks.exe
PID 1336 wrote to memory of 4652 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\SysWOW64\schtasks.exe
PID 1336 wrote to memory of 3824 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1336 wrote to memory of 3824 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1336 wrote to memory of 3824 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1336 wrote to memory of 3824 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1336 wrote to memory of 3824 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1336 wrote to memory of 3824 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1336 wrote to memory of 3824 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Processes

C:\Users\Admin\AppData\Local\Temp\160054467ff97cc397fce9eddc6ce8a27d24320d45ccb3a8c8ba2a28ccbc6b79.exe

"C:\Users\Admin\AppData\Local\Temp\160054467ff97cc397fce9eddc6ce8a27d24320d45ccb3a8c8ba2a28ccbc6b79.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe" /logtoconsole=false /logfile= /u "C:\Users\Admin\AppData\Local\Temp\160054467ff97cc397fce9eddc6ce8a27d24320d45ccb3a8c8ba2a28ccbc6b79.exe"

C:\Windows\SysWOW64\schtasks.exe

"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\yNsxbmDzw" /XML "C:\Users\Admin\AppData\Local\Temp\tmp5A8F.tmp"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"

Network

Country Destination Domain Proto
US 52.182.141.63:443 tcp
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
US 8.8.8.8:53 pastebin.com udp
US 172.67.34.170:80 pastebin.com tcp
US 172.67.34.170:443 pastebin.com tcp
US 185.133.193.254:1337 tcp
US 185.133.193.254:1337 tcp

Files

memory/3036-130-0x00000000007B0000-0x000000000083A000-memory.dmp

memory/3036-131-0x00000000051C0000-0x000000000525C000-memory.dmp

memory/3036-132-0x0000000005810000-0x0000000005DB4000-memory.dmp

memory/3036-133-0x0000000005300000-0x0000000005392000-memory.dmp

memory/3036-134-0x0000000005280000-0x000000000528A000-memory.dmp

memory/3036-135-0x00000000054F0000-0x0000000005546000-memory.dmp

memory/1336-136-0x0000000000000000-mapping.dmp

memory/1336-137-0x00000000004A0000-0x00000000004AC000-memory.dmp

memory/1336-138-0x0000000002680000-0x000000000269A000-memory.dmp

memory/1336-139-0x0000000005480000-0x00000000054E6000-memory.dmp

memory/4652-140-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Local\Temp\tmp5A8F.tmp

MD5 c7185db680d8226e6e4ea720962dc255
SHA1 017ed600051bafdc94c481e5042ee00c8a4f9bd3
SHA256 9405b354a8d40a403c2e7044b81210729ea5fd525ba314c1f24b90f0addeec74
SHA512 9bd921663d5747b8cefafaaeff9b500a3ae0fdec92ab8121c506ce81885c2057892a053eff4362a7c2a00945c93e6c6353fb9dd99755373392d9a139f0e9a712

memory/3824-142-0x0000000000000000-mapping.dmp

memory/3824-143-0x0000000000400000-0x000000000040C000-memory.dmp