Malware Analysis Report

2024-12-01 03:11

Sample ID 241111-v9rc3asgpe
Target a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe
SHA256 a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4
Tags
remotehost remcos collection discovery 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

a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4

Threat Level: Known bad

The file a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe was found to be: Known bad.

Malicious Activity Summary

remotehost remcos collection discovery spyware stealer

Remcos family

Detected Nirsoft tools

NirSoft WebBrowserPassView

NirSoft MailPassView

Reads user/profile data of web browsers

Accesses Microsoft Outlook accounts

Suspicious use of SetThreadContext

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-11 17:41

Signatures

Remcos family

remcos

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-11 17:41

Reported

2024-11-11 17:44

Platform

win7-20240903-en

Max time kernel

147s

Max time network

147s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe"

Signatures

Detected Nirsoft tools

Description Indicator Process Target
N/A N/A N/A N/A
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NirSoft MailPassView

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

NirSoft WebBrowserPassView

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

Reads user/profile data of web browsers

spyware stealer

Accesses Microsoft Outlook accounts

collection
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2276 wrote to memory of 2968 N/A C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe
PID 2276 wrote to memory of 2968 N/A C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe
PID 2276 wrote to memory of 2968 N/A C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe
PID 2276 wrote to memory of 2968 N/A C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe
PID 2276 wrote to memory of 2540 N/A C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe
PID 2276 wrote to memory of 2540 N/A C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe
PID 2276 wrote to memory of 2540 N/A C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe
PID 2276 wrote to memory of 2540 N/A C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe
PID 2276 wrote to memory of 2912 N/A C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe
PID 2276 wrote to memory of 2912 N/A C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe
PID 2276 wrote to memory of 2912 N/A C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe
PID 2276 wrote to memory of 2912 N/A C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe

"C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe"

C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe

C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe /stext "C:\Users\Admin\AppData\Local\Temp\yrmvaqwvm"

C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe

C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe /stext "C:\Users\Admin\AppData\Local\Temp\itrobigpabfn"

C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe

C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe /stext "C:\Users\Admin\AppData\Local\Temp\lnwhcbrqojxshab"

Network

Country Destination Domain Proto
US 8.8.8.8:53 shlobo.duckdns.org udp
US 8.8.8.8:53 shlobo.duckdns.org udp
US 192.3.101.149:9374 shlobo.duckdns.org tcp
US 192.3.101.149:9374 shlobo.duckdns.org tcp
US 8.8.8.8:53 geoplugin.net udp
NL 178.237.33.50:80 geoplugin.net tcp

Files

memory/2968-2-0x0000000000400000-0x0000000000478000-memory.dmp

memory/2540-3-0x0000000000400000-0x0000000000462000-memory.dmp

memory/2912-14-0x0000000000400000-0x0000000000424000-memory.dmp

memory/2540-13-0x0000000000400000-0x0000000000462000-memory.dmp

memory/2968-12-0x0000000000400000-0x0000000000478000-memory.dmp

memory/2540-11-0x0000000000400000-0x0000000000462000-memory.dmp

memory/2968-10-0x0000000000400000-0x0000000000478000-memory.dmp

memory/2540-9-0x0000000000400000-0x0000000000462000-memory.dmp

memory/2968-8-0x0000000000400000-0x0000000000478000-memory.dmp

memory/2540-7-0x0000000000400000-0x0000000000462000-memory.dmp

memory/2912-16-0x0000000000400000-0x0000000000424000-memory.dmp

memory/2912-17-0x0000000000400000-0x0000000000424000-memory.dmp

memory/2912-18-0x0000000000400000-0x0000000000424000-memory.dmp

memory/2912-21-0x0000000000400000-0x0000000000424000-memory.dmp

memory/2968-26-0x0000000000400000-0x0000000000478000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\yrmvaqwvm

MD5 f3b25701fe362ec84616a93a45ce9998
SHA1 d62636d8caec13f04e28442a0a6fa1afeb024bbb
SHA256 b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209
SHA512 98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

memory/2540-30-0x0000000000400000-0x0000000000462000-memory.dmp

memory/2276-36-0x0000000010000000-0x0000000010019000-memory.dmp

memory/2276-35-0x0000000010000000-0x0000000010019000-memory.dmp

memory/2276-32-0x0000000010000000-0x0000000010019000-memory.dmp

C:\ProgramData\remcos\logs.dat

MD5 6ec66e1d29280db29a0624ca96e94725
SHA1 091550560fd80cc08623bb11d39e61999706c31a
SHA256 7215d22047fdb55f01d11f6abe8c9376db2857c4e72520cfe8e779799f30c76a
SHA512 0919c03b3bd1f6dc7edcb18af1396e5b90d8c99dcb73c529a14f14bf5e2ce146804f2647e330ac140cb4837398b45df217a540e025ac6cbf6aac76b8048e27c2

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-11 17:41

Reported

2024-11-11 17:44

Platform

win10v2004-20241007-en

Max time kernel

148s

Max time network

142s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe"

Signatures

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe

"C:\Users\Admin\AppData\Local\Temp\a4e7c1a4bb830c731b60d90c8dea0f01367c3bdc74ae782edfee29507960f2e4.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 shlobo.duckdns.org udp
US 192.3.101.149:9687 shlobo.duckdns.org tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 149.101.3.192.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 geoplugin.net udp
NL 178.237.33.50:80 geoplugin.net tcp
US 8.8.8.8:53 20.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 50.33.237.178.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 28.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 71.209.201.84.in-addr.arpa udp

Files

C:\ProgramData\remcos\logs.dat

MD5 6ec66e1d29280db29a0624ca96e94725
SHA1 091550560fd80cc08623bb11d39e61999706c31a
SHA256 7215d22047fdb55f01d11f6abe8c9376db2857c4e72520cfe8e779799f30c76a
SHA512 0919c03b3bd1f6dc7edcb18af1396e5b90d8c99dcb73c529a14f14bf5e2ce146804f2647e330ac140cb4837398b45df217a540e025ac6cbf6aac76b8048e27c2