Malware Analysis Report

2024-09-11 10:03

Sample ID 240403-b2mkcsca91
Target a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe
SHA256 a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166
Tags
limerat zgrat 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

a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166

Threat Level: Known bad

The file a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe was found to be: Known bad.

Malicious Activity Summary

limerat zgrat rat

ZGRat

Detect ZGRat V1

LimeRAT

Zgrat family

Detects executables packed with unregistered version of .NET Reactor

Detects executables packed with unregistered version of .NET Reactor

Checks computer location settings

.NET Reactor proctector

Executes dropped EXE

Loads dropped DLL

Unsigned PE

Enumerates physical storage devices

Creates scheduled task(s)

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
Query Registry
T1012
System Information Discovery
T1082
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-04-03 01:38

Signatures

Detect ZGRat V1

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

Detects executables packed with unregistered version of .NET Reactor

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

Zgrat family

zgrat

.NET Reactor proctector

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

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-03 01:38

Reported

2024-04-03 01:41

Platform

win10v2004-20240226-en

Max time kernel

150s

Max time network

168s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe"

Signatures

Detect ZGRat V1

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

LimeRAT

rat limerat

ZGRat

rat zgrat

Detects executables packed with unregistered version of .NET Reactor

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

.NET Reactor proctector

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

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Necobit.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 WriteProcessMemory

Description Indicator Process Target
PID 1620 wrote to memory of 4720 N/A C:\Users\Admin\AppData\Local\Temp\a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe C:\Windows\SysWOW64\schtasks.exe
PID 1620 wrote to memory of 4720 N/A C:\Users\Admin\AppData\Local\Temp\a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe C:\Windows\SysWOW64\schtasks.exe
PID 1620 wrote to memory of 4720 N/A C:\Users\Admin\AppData\Local\Temp\a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe C:\Windows\SysWOW64\schtasks.exe
PID 1620 wrote to memory of 1340 N/A C:\Users\Admin\AppData\Local\Temp\a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe C:\Users\Admin\AppData\Roaming\Necobit.exe
PID 1620 wrote to memory of 1340 N/A C:\Users\Admin\AppData\Local\Temp\a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe C:\Users\Admin\AppData\Roaming\Necobit.exe
PID 1620 wrote to memory of 1340 N/A C:\Users\Admin\AppData\Local\Temp\a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe C:\Users\Admin\AppData\Roaming\Necobit.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe

"C:\Users\Admin\AppData\Local\Temp\a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe"

C:\Windows\SysWOW64\schtasks.exe

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

C:\Users\Admin\AppData\Roaming\Necobit.exe

"C:\Users\Admin\AppData\Roaming\Necobit.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 152.33.115.104.in-addr.arpa udp
US 8.8.8.8:53 79.121.231.20.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 136.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 65.192.122.92.in-addr.arpa udp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 106.246.116.51.in-addr.arpa udp

Files

memory/1620-1-0x00000000751A0000-0x0000000075950000-memory.dmp

memory/1620-0-0x0000000000D00000-0x0000000000D54000-memory.dmp

memory/1620-2-0x0000000005860000-0x0000000005870000-memory.dmp

memory/1620-3-0x00000000057B0000-0x000000000584C000-memory.dmp

memory/1620-4-0x00000000751A0000-0x0000000075950000-memory.dmp

memory/1620-5-0x00000000012A0000-0x0000000001306000-memory.dmp

memory/1620-6-0x0000000006260000-0x0000000006804000-memory.dmp

C:\Users\Admin\AppData\Roaming\Necobit.exe

MD5 ad997dc4ee32ab469e45009f218175d0
SHA1 17ef145486c494ea9c727972c501471e720887f0
SHA256 a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166
SHA512 727aceb3edd5dfbbbad84e1aef4beb3773313378bd4fa6cd77800d6cf578ba740a5ebc1f3740593071a26daa2cf91e49243fa4ba043d934c8bd936a1526c18d0

memory/1340-15-0x00000000751A0000-0x0000000075950000-memory.dmp

memory/1620-18-0x00000000751A0000-0x0000000075950000-memory.dmp

memory/1340-17-0x0000000004DD0000-0x0000000004DE0000-memory.dmp

memory/1340-19-0x00000000751A0000-0x0000000075950000-memory.dmp

memory/1340-20-0x0000000004DD0000-0x0000000004DE0000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-03 01:38

Reported

2024-04-03 01:41

Platform

win7-20240221-en

Max time kernel

129s

Max time network

125s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe"

Signatures

Detect ZGRat V1

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

LimeRAT

rat limerat

ZGRat

rat zgrat

Detects executables packed with unregistered version of .NET Reactor

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

.NET Reactor proctector

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

Executes dropped EXE

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

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.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 WriteProcessMemory

Description Indicator Process Target
PID 2804 wrote to memory of 1520 N/A C:\Users\Admin\AppData\Local\Temp\a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe C:\Windows\SysWOW64\schtasks.exe
PID 2804 wrote to memory of 1520 N/A C:\Users\Admin\AppData\Local\Temp\a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe C:\Windows\SysWOW64\schtasks.exe
PID 2804 wrote to memory of 1520 N/A C:\Users\Admin\AppData\Local\Temp\a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe C:\Windows\SysWOW64\schtasks.exe
PID 2804 wrote to memory of 1520 N/A C:\Users\Admin\AppData\Local\Temp\a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe C:\Windows\SysWOW64\schtasks.exe
PID 2804 wrote to memory of 2228 N/A C:\Users\Admin\AppData\Local\Temp\a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe C:\Users\Admin\AppData\Roaming\Necobit.exe
PID 2804 wrote to memory of 2228 N/A C:\Users\Admin\AppData\Local\Temp\a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe C:\Users\Admin\AppData\Roaming\Necobit.exe
PID 2804 wrote to memory of 2228 N/A C:\Users\Admin\AppData\Local\Temp\a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe C:\Users\Admin\AppData\Roaming\Necobit.exe
PID 2804 wrote to memory of 2228 N/A C:\Users\Admin\AppData\Local\Temp\a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe C:\Users\Admin\AppData\Roaming\Necobit.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe

"C:\Users\Admin\AppData\Local\Temp\a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166.exe"

C:\Windows\SysWOW64\schtasks.exe

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

C:\Users\Admin\AppData\Roaming\Necobit.exe

"C:\Users\Admin\AppData\Roaming\Necobit.exe"

Network

N/A

Files

memory/2804-0-0x0000000000120000-0x0000000000174000-memory.dmp

memory/2804-1-0x00000000743A0000-0x0000000074A8E000-memory.dmp

memory/2804-2-0x0000000001E40000-0x0000000001E80000-memory.dmp

memory/2804-3-0x00000000743A0000-0x0000000074A8E000-memory.dmp

memory/2804-4-0x0000000001E40000-0x0000000001E80000-memory.dmp

\Users\Admin\AppData\Roaming\Necobit.exe

MD5 ad997dc4ee32ab469e45009f218175d0
SHA1 17ef145486c494ea9c727972c501471e720887f0
SHA256 a1f8bb5990775f277540eb4c7579695477445afd90262cb819567cc9b3042166
SHA512 727aceb3edd5dfbbbad84e1aef4beb3773313378bd4fa6cd77800d6cf578ba740a5ebc1f3740593071a26daa2cf91e49243fa4ba043d934c8bd936a1526c18d0

memory/2228-16-0x0000000000C30000-0x0000000000C84000-memory.dmp

memory/2228-17-0x00000000743A0000-0x0000000074A8E000-memory.dmp

memory/2228-18-0x00000000003F0000-0x0000000000430000-memory.dmp

memory/2804-19-0x00000000743A0000-0x0000000074A8E000-memory.dmp

memory/2228-20-0x00000000743A0000-0x0000000074A8E000-memory.dmp

memory/2228-21-0x00000000003F0000-0x0000000000430000-memory.dmp