Malware Analysis Report

2024-11-16 13:10

Sample ID 220520-2p1jkafgc6
Target 0a7bb504bdceca0d03921b4cbfe7915917685afd405ebafab719d2236c8ab35f
SHA256 0a7bb504bdceca0d03921b4cbfe7915917685afd405ebafab719d2236c8ab35f
Tags
limerat 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

0a7bb504bdceca0d03921b4cbfe7915917685afd405ebafab719d2236c8ab35f

Threat Level: Known bad

The file 0a7bb504bdceca0d03921b4cbfe7915917685afd405ebafab719d2236c8ab35f was found to be: Known bad.

Malicious Activity Summary

limerat rat

Limerat family

LimeRAT

Executes dropped EXE

Loads dropped DLL

Checks computer location settings

Legitimate hosting services abused for malware hosting/C2

Maps connected drives based on registry

Enumerates physical storage devices

Modifies system certificate store

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Creates scheduled task(s)

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-05-20 22:46

Signatures

Limerat family

limerat

Analysis: behavioral1

Detonation Overview

Submitted

2022-05-20 22:46

Reported

2022-05-20 23:01

Platform

win7-20220414-en

Max time kernel

151s

Max time network

162s

Command Line

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

Signatures

LimeRAT

rat limerat

Executes dropped EXE

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

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\masarati.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\masarati.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:\Users\Admin\AppData\Local\Temp\masarati.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0 C:\Users\Admin\AppData\Local\Temp\masarati.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum C:\Users\Admin\AppData\Local\Temp\officework.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0 C:\Users\Admin\AppData\Local\Temp\officework.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

Modifies system certificate store

evasion spyware trojan
Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474 C:\Users\Admin\AppData\Local\Temp\officework.exe N/A
Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474\Blob = 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 C:\Users\Admin\AppData\Local\Temp\officework.exe N/A

Suspicious use of AdjustPrivilegeToken

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

Processes

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

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

C:\Windows\SysWOW64\schtasks.exe

schtasks /create /f /sc ONLOGON /RL HIGHEST /tn LimeRAT-Admin /tr "'C:\Users\Admin\AppData\Local\Temp\officework.exe'"

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 pastebin.com udp
US 104.20.67.143:443 pastebin.com tcp
FR 194.5.97.59:51510 tcp
FR 194.5.97.59:51510 tcp
FR 194.5.97.59:51510 tcp
FR 194.5.97.59:51510 tcp
FR 194.5.97.59:51510 tcp
FR 194.5.97.59:51510 tcp
FR 194.5.97.59:51510 tcp
FR 194.5.97.59:51510 tcp
FR 194.5.97.59:51510 tcp
FR 194.5.97.59:51510 tcp
FR 194.5.97.59:51510 tcp
FR 194.5.97.59:51510 tcp
FR 194.5.97.59:51510 tcp
FR 194.5.97.59:51510 tcp
FR 194.5.97.59:51510 tcp

Files

memory/336-54-0x00000000011C0000-0x00000000011CC000-memory.dmp

memory/2004-55-0x0000000000000000-mapping.dmp

memory/336-56-0x00000000752A1000-0x00000000752A3000-memory.dmp

\Users\Admin\AppData\Local\Temp\officework.exe

MD5 e7e752581b91e5bf2eccb44298128ec5
SHA1 e321813c52ec62ebadce88cf8afaea4415186129
SHA256 4adcc73ce3501f990fc95bfb0ebca1a4ca61054b137a34c7bc9435cfdd2b7f6a
SHA512 2681a39b47f8620cef044b4a8336fb3e9f1261ab595b540746aabc5eba26b238c5c11383d2d3b829d56d5279e78587e68e7875a585e702fba57b35719e6c4e82

memory/844-59-0x0000000000000000-mapping.dmp

\Users\Admin\AppData\Local\Temp\officework.exe

MD5 e7e752581b91e5bf2eccb44298128ec5
SHA1 e321813c52ec62ebadce88cf8afaea4415186129
SHA256 4adcc73ce3501f990fc95bfb0ebca1a4ca61054b137a34c7bc9435cfdd2b7f6a
SHA512 2681a39b47f8620cef044b4a8336fb3e9f1261ab595b540746aabc5eba26b238c5c11383d2d3b829d56d5279e78587e68e7875a585e702fba57b35719e6c4e82

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

MD5 e7e752581b91e5bf2eccb44298128ec5
SHA1 e321813c52ec62ebadce88cf8afaea4415186129
SHA256 4adcc73ce3501f990fc95bfb0ebca1a4ca61054b137a34c7bc9435cfdd2b7f6a
SHA512 2681a39b47f8620cef044b4a8336fb3e9f1261ab595b540746aabc5eba26b238c5c11383d2d3b829d56d5279e78587e68e7875a585e702fba57b35719e6c4e82

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

MD5 e7e752581b91e5bf2eccb44298128ec5
SHA1 e321813c52ec62ebadce88cf8afaea4415186129
SHA256 4adcc73ce3501f990fc95bfb0ebca1a4ca61054b137a34c7bc9435cfdd2b7f6a
SHA512 2681a39b47f8620cef044b4a8336fb3e9f1261ab595b540746aabc5eba26b238c5c11383d2d3b829d56d5279e78587e68e7875a585e702fba57b35719e6c4e82

memory/844-62-0x0000000000E20000-0x0000000000E2C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-05-20 22:46

Reported

2022-05-20 23:01

Platform

win10v2004-20220414-en

Max time kernel

154s

Max time network

164s

Command Line

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

Signatures

LimeRAT

rat limerat

Executes dropped EXE

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

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\masarati.exe N/A

Legitimate hosting services abused for malware hosting/C2

Maps connected drives based on registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0 C:\Users\Admin\AppData\Local\Temp\officework.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum C:\Users\Admin\AppData\Local\Temp\masarati.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0 C:\Users\Admin\AppData\Local\Temp\masarati.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum C:\Users\Admin\AppData\Local\Temp\officework.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 use of AdjustPrivilegeToken

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

Processes

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

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

C:\Windows\SysWOW64\schtasks.exe

schtasks /create /f /sc ONLOGON /RL HIGHEST /tn LimeRAT-Admin /tr "'C:\Users\Admin\AppData\Local\Temp\officework.exe'"

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

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

Network

Country Destination Domain Proto
IE 20.54.110.249:443 tcp
US 8.8.8.8:53 151.122.125.40.in-addr.arpa udp
US 8.8.8.8:53 pastebin.com udp
US 104.20.67.143:443 pastebin.com tcp
FR 194.5.97.59:51510 tcp
US 8.8.8.8:53 7.6.0.0.0.0.0.0.0.0.0.0.0.0.0.0.3.0.0.0.2.0.0.0.0.2.0.1.3.0.6.2.ip6.arpa udp
FR 194.5.97.59:51510 tcp
US 8.8.8.8:53 storesdk.dsx.mp.microsoft.com udp
FR 2.18.109.224:443 storesdk.dsx.mp.microsoft.com tcp
FR 194.5.97.59:51510 tcp
FR 194.5.97.59:51510 tcp
FR 194.5.97.59:51510 tcp
US 8.8.8.8:53 store-images.s-microsoft.com udp
NL 104.123.41.133:80 store-images.s-microsoft.com tcp
NL 104.123.41.133:80 store-images.s-microsoft.com tcp
FR 194.5.97.59:51510 tcp
FR 194.5.97.59:51510 tcp
FR 194.5.97.59:51510 tcp
FR 194.5.97.59:51510 tcp
US 8.8.8.8:53 tsfe.trafficshaping.dsp.mp.microsoft.com udp
US 8.8.8.8:53 store-images.s-microsoft.com udp
IE 20.54.110.119:443 tsfe.trafficshaping.dsp.mp.microsoft.com tcp
NL 104.123.41.133:80 store-images.s-microsoft.com tcp
NL 104.123.41.133:80 store-images.s-microsoft.com tcp
NL 104.123.41.133:80 store-images.s-microsoft.com tcp
IE 20.54.110.119:443 tsfe.trafficshaping.dsp.mp.microsoft.com tcp
FR 194.5.97.59:51510 tcp
FR 194.5.97.59:51510 tcp
FR 194.5.97.59:51510 tcp
US 8.8.8.8:53 dl.delivery.mp.microsoft.com udp
FR 194.5.97.59:51510 tcp
NL 8.238.21.254:80 dl.delivery.mp.microsoft.com tcp
NL 8.238.21.254:80 dl.delivery.mp.microsoft.com tcp
NL 8.238.21.254:80 dl.delivery.mp.microsoft.com tcp
NL 8.238.21.254:80 dl.delivery.mp.microsoft.com tcp
US 8.8.8.8:53 tlu.dl.delivery.mp.microsoft.com udp
US 93.184.221.240:80 tlu.dl.delivery.mp.microsoft.com tcp
US 93.184.221.240:80 tlu.dl.delivery.mp.microsoft.com tcp
NL 8.238.21.254:80 dl.delivery.mp.microsoft.com tcp
NL 8.238.21.254:80 dl.delivery.mp.microsoft.com tcp
US 93.184.221.240:80 tlu.dl.delivery.mp.microsoft.com tcp
US 8.8.8.8:53 2.tlu.dl.delivery.mp.microsoft.com udp
FR 2.22.147.32:80 2.tlu.dl.delivery.mp.microsoft.com tcp
US 93.184.221.240:80 tlu.dl.delivery.mp.microsoft.com tcp
US 93.184.221.240:80 tlu.dl.delivery.mp.microsoft.com tcp
US 93.184.221.240:80 tlu.dl.delivery.mp.microsoft.com tcp
FR 194.5.97.59:51510 tcp
FR 194.5.97.59:51510 tcp
FR 194.5.97.59:51510 tcp

Files

memory/2420-130-0x0000000000A20000-0x0000000000A2C000-memory.dmp

memory/2420-131-0x00000000053E0000-0x000000000547C000-memory.dmp

memory/2420-132-0x0000000005480000-0x00000000054E6000-memory.dmp

memory/2420-133-0x0000000006030000-0x00000000065D4000-memory.dmp

memory/4144-134-0x0000000000000000-mapping.dmp

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

MD5 e7e752581b91e5bf2eccb44298128ec5
SHA1 e321813c52ec62ebadce88cf8afaea4415186129
SHA256 4adcc73ce3501f990fc95bfb0ebca1a4ca61054b137a34c7bc9435cfdd2b7f6a
SHA512 2681a39b47f8620cef044b4a8336fb3e9f1261ab595b540746aabc5eba26b238c5c11383d2d3b829d56d5279e78587e68e7875a585e702fba57b35719e6c4e82

memory/736-135-0x0000000000000000-mapping.dmp

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

MD5 e7e752581b91e5bf2eccb44298128ec5
SHA1 e321813c52ec62ebadce88cf8afaea4415186129
SHA256 4adcc73ce3501f990fc95bfb0ebca1a4ca61054b137a34c7bc9435cfdd2b7f6a
SHA512 2681a39b47f8620cef044b4a8336fb3e9f1261ab595b540746aabc5eba26b238c5c11383d2d3b829d56d5279e78587e68e7875a585e702fba57b35719e6c4e82

memory/736-138-0x0000000005710000-0x00000000057A2000-memory.dmp