Malware Analysis Report

2024-09-11 10:03

Sample ID 240330-x2pklscf41
Target Lecture10.exe
SHA256 fbb2ba93880b2f923b51f528610f4df715fcb6e397b9e9bc49783d09a891df24
Tags
limerat rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

fbb2ba93880b2f923b51f528610f4df715fcb6e397b9e9bc49783d09a891df24

Threat Level: Known bad

The file Lecture10.exe was found to be: Known bad.

Malicious Activity Summary

limerat rat

LimeRAT

Limerat family

Checks computer location settings

Executes dropped EXE

Loads dropped DLL

Legitimate hosting services abused for malware hosting/C2

Enumerates physical storage devices

Unsigned PE

Suspicious use of WriteProcessMemory

Creates scheduled task(s)

Suspicious use of AdjustPrivilegeToken

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
Query Registry
T1012
System Information Discovery
T1082
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

2024-03-30 19:21

Signatures

Limerat family

limerat

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-30 19:21

Reported

2024-03-30 19:30

Platform

win10v2004-20240226-en

Max time kernel

301s

Max time network

307s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Lecture10.exe"

Signatures

LimeRAT

rat limerat

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\Lecture10.exe N/A

Executes dropped EXE

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 552 wrote to memory of 2228 N/A C:\Users\Admin\AppData\Local\Temp\Lecture10.exe C:\Windows\SysWOW64\schtasks.exe
PID 552 wrote to memory of 2228 N/A C:\Users\Admin\AppData\Local\Temp\Lecture10.exe C:\Windows\SysWOW64\schtasks.exe
PID 552 wrote to memory of 2228 N/A C:\Users\Admin\AppData\Local\Temp\Lecture10.exe C:\Windows\SysWOW64\schtasks.exe
PID 552 wrote to memory of 1384 N/A C:\Users\Admin\AppData\Local\Temp\Lecture10.exe C:\Users\Admin\AppData\Local\Temp\Wservices.exe
PID 552 wrote to memory of 1384 N/A C:\Users\Admin\AppData\Local\Temp\Lecture10.exe C:\Users\Admin\AppData\Local\Temp\Wservices.exe
PID 552 wrote to memory of 1384 N/A C:\Users\Admin\AppData\Local\Temp\Lecture10.exe C:\Users\Admin\AppData\Local\Temp\Wservices.exe

Processes

C:\Users\Admin\AppData\Local\Temp\Lecture10.exe

"C:\Users\Admin\AppData\Local\Temp\Lecture10.exe"

C:\Windows\SysWOW64\schtasks.exe

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

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

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

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4136 --field-trial-handle=2180,i,12780723798465539942,12010519452607841069,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 98.58.20.217.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 35.34.16.2.in-addr.arpa udp
US 8.8.8.8:53 pastebin.com udp
US 104.20.67.143:443 pastebin.com tcp
US 8.8.8.8:53 143.67.20.104.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 202.110.86.104.in-addr.arpa udp
US 8.8.8.8:53 218.110.86.104.in-addr.arpa udp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
NL 142.251.39.106:443 chromewebstore.googleapis.com tcp
US 8.8.8.8:53 106.39.251.142.in-addr.arpa udp
US 8.8.8.8:53 28.173.189.20.in-addr.arpa udp

Files

memory/552-0-0x00000000751E0000-0x0000000075990000-memory.dmp

memory/552-1-0x0000000000380000-0x00000000003B8000-memory.dmp

memory/552-2-0x0000000004DC0000-0x0000000004E5C000-memory.dmp

memory/552-3-0x0000000004D40000-0x0000000004DA6000-memory.dmp

memory/552-4-0x0000000004D30000-0x0000000004D40000-memory.dmp

memory/552-5-0x0000000005A10000-0x0000000005FB4000-memory.dmp

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

MD5 ab33ded3d83d29d7c602e41bd9f3398b
SHA1 e2b55bb5e4ee386008b3509017ad7e9891ba770d
SHA256 fbb2ba93880b2f923b51f528610f4df715fcb6e397b9e9bc49783d09a891df24
SHA512 779789b6a959d260c4ea3ff9d03b22d98a76662234cb47553fd4f7e63743fe22399af90e8f39202a8e22e5fd5329889d2ffaf3229a19539817db3cf656110918

memory/552-17-0x00000000751E0000-0x0000000075990000-memory.dmp

memory/1384-19-0x00000000751E0000-0x0000000075990000-memory.dmp

memory/552-20-0x00000000751E0000-0x0000000075990000-memory.dmp

memory/1384-21-0x0000000004F60000-0x0000000004F70000-memory.dmp

memory/1384-22-0x00000000751E0000-0x0000000075990000-memory.dmp

memory/1384-23-0x0000000004F60000-0x0000000004F70000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-30 19:21

Reported

2024-03-30 19:30

Platform

win7-20240221-en

Max time kernel

296s

Max time network

300s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Lecture10.exe"

Signatures

LimeRAT

rat limerat

Executes dropped EXE

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

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Lecture10.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Lecture10.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\Local\Temp\Wservices.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Wservices.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2720 wrote to memory of 2604 N/A C:\Users\Admin\AppData\Local\Temp\Lecture10.exe C:\Windows\SysWOW64\schtasks.exe
PID 2720 wrote to memory of 2604 N/A C:\Users\Admin\AppData\Local\Temp\Lecture10.exe C:\Windows\SysWOW64\schtasks.exe
PID 2720 wrote to memory of 2604 N/A C:\Users\Admin\AppData\Local\Temp\Lecture10.exe C:\Windows\SysWOW64\schtasks.exe
PID 2720 wrote to memory of 2604 N/A C:\Users\Admin\AppData\Local\Temp\Lecture10.exe C:\Windows\SysWOW64\schtasks.exe
PID 2720 wrote to memory of 2572 N/A C:\Users\Admin\AppData\Local\Temp\Lecture10.exe C:\Users\Admin\AppData\Local\Temp\Wservices.exe
PID 2720 wrote to memory of 2572 N/A C:\Users\Admin\AppData\Local\Temp\Lecture10.exe C:\Users\Admin\AppData\Local\Temp\Wservices.exe
PID 2720 wrote to memory of 2572 N/A C:\Users\Admin\AppData\Local\Temp\Lecture10.exe C:\Users\Admin\AppData\Local\Temp\Wservices.exe
PID 2720 wrote to memory of 2572 N/A C:\Users\Admin\AppData\Local\Temp\Lecture10.exe C:\Users\Admin\AppData\Local\Temp\Wservices.exe

Processes

C:\Users\Admin\AppData\Local\Temp\Lecture10.exe

"C:\Users\Admin\AppData\Local\Temp\Lecture10.exe"

C:\Windows\SysWOW64\schtasks.exe

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

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

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

Network

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

Files

memory/2720-0-0x0000000000BA0000-0x0000000000BD8000-memory.dmp

memory/2720-1-0x0000000074B20000-0x000000007520E000-memory.dmp

memory/2720-3-0x00000000009F0000-0x0000000000A30000-memory.dmp

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

MD5 ab33ded3d83d29d7c602e41bd9f3398b
SHA1 e2b55bb5e4ee386008b3509017ad7e9891ba770d
SHA256 fbb2ba93880b2f923b51f528610f4df715fcb6e397b9e9bc49783d09a891df24
SHA512 779789b6a959d260c4ea3ff9d03b22d98a76662234cb47553fd4f7e63743fe22399af90e8f39202a8e22e5fd5329889d2ffaf3229a19539817db3cf656110918

memory/2572-14-0x0000000074B20000-0x000000007520E000-memory.dmp

memory/2720-13-0x0000000074B20000-0x000000007520E000-memory.dmp

memory/2572-15-0x00000000010D0000-0x0000000001108000-memory.dmp

memory/2572-16-0x0000000000A80000-0x0000000000AC0000-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\TarCF39.tmp

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

memory/2572-54-0x0000000074B20000-0x000000007520E000-memory.dmp

memory/2572-55-0x0000000000A80000-0x0000000000AC0000-memory.dmp