Malware Analysis Report

2024-10-19 06:55

Sample ID 240525-q6h53aeg3z
Target regasms.exe
SHA256 7cea3459fe006e787947d8eedc2770285061bc5e9a0ca0ffc7213a96756341fb
Tags
rat lnkk asyncrat spyware stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

7cea3459fe006e787947d8eedc2770285061bc5e9a0ca0ffc7213a96756341fb

Threat Level: Known bad

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

Malicious Activity Summary

rat lnkk asyncrat spyware stealer

Async RAT payload

Asyncrat family

AsyncRat

Reads user/profile data of web browsers

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-25 13:52

Signatures

Async RAT payload

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

Asyncrat family

asyncrat

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-25 13:52

Reported

2024-05-25 13:56

Platform

win7-20240220-en

Max time kernel

120s

Max time network

146s

Command Line

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

Signatures

AsyncRat

rat asyncrat

Reads user/profile data of web browsers

spyware stealer

Suspicious behavior: EnumeratesProcesses

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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of SetWindowsHookEx

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

Processes

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 leetboy.dynuddns.net udp
IT 185.196.11.252:1338 leetboy.dynuddns.net tcp
IT 185.196.11.252:1338 leetboy.dynuddns.net tcp

Files

memory/1728-0-0x000000007450E000-0x000000007450F000-memory.dmp

memory/1728-1-0x0000000000B00000-0x0000000000B16000-memory.dmp

memory/1728-2-0x0000000074500000-0x0000000074BEE000-memory.dmp

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

MD5 29f65ba8e88c063813cc50a4ea544e93
SHA1 05a7040d5c127e68c25d81cc51271ffb8bef3568
SHA256 1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184
SHA512 e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

C:\Users\Admin\AppData\Local\Temp\Tar3F29.tmp

MD5 435a9ac180383f9fa094131b173a2f7b
SHA1 76944ea657a9db94f9a4bef38f88c46ed4166983
SHA256 67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34
SHA512 1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

memory/1728-40-0x000000007450E000-0x000000007450F000-memory.dmp

memory/1728-41-0x0000000074500000-0x0000000074BEE000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-25 13:52

Reported

2024-05-25 13:57

Platform

win10v2004-20240426-en

Max time kernel

148s

Max time network

153s

Command Line

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

Signatures

AsyncRat

rat asyncrat

Reads user/profile data of web browsers

spyware stealer

Suspicious behavior: EnumeratesProcesses

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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of SetWindowsHookEx

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

Processes

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 144.107.17.2.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
NL 23.62.61.155:443 www.bing.com tcp
US 8.8.8.8:53 140.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 155.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 leetboy.dynuddns.net udp
IT 185.196.11.252:1338 leetboy.dynuddns.net tcp
NL 23.62.61.155:443 www.bing.com tcp
US 8.8.8.8:53 252.11.196.185.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.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

Files

memory/1488-0-0x000000007485E000-0x000000007485F000-memory.dmp

memory/1488-1-0x0000000000EE0000-0x0000000000EF6000-memory.dmp

memory/1488-2-0x0000000074850000-0x0000000075000000-memory.dmp

memory/1488-3-0x0000000006170000-0x0000000006714000-memory.dmp

memory/1488-4-0x0000000005CA0000-0x0000000005D32000-memory.dmp

memory/1488-5-0x0000000005E30000-0x0000000005E3A000-memory.dmp

memory/1488-8-0x0000000006EB0000-0x0000000006F4C000-memory.dmp

memory/1488-9-0x0000000006990000-0x00000000069F6000-memory.dmp

memory/1488-10-0x000000007485E000-0x000000007485F000-memory.dmp

memory/1488-11-0x0000000074850000-0x0000000075000000-memory.dmp