Malware Analysis Report

2025-01-02 03:43

Sample ID 240509-enhk2ace89
Target xIsAJb1izaR6.exe
SHA256 91e4bb8408db1e54d407d1859cbdde5c9df1a70c755474b5c7542ad661e30d00
Tags
rs1_release remcos collection spyware stealer rat
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

91e4bb8408db1e54d407d1859cbdde5c9df1a70c755474b5c7542ad661e30d00

Threat Level: Known bad

The file xIsAJb1izaR6.exe was found to be: Known bad.

Malicious Activity Summary

rs1_release remcos collection spyware stealer rat

Remcos

Remcos family

NirSoft MailPassView

NirSoft WebBrowserPassView

Nirsoft

Reads user/profile data of web browsers

Accesses Microsoft Outlook accounts

Suspicious use of SetThreadContext

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-09 04:05

Signatures

Remcos family

remcos

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-09 04:05

Reported

2024-05-09 04:07

Platform

win7-20240221-en

Max time kernel

147s

Max time network

145s

Command Line

"C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe"

Signatures

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

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

Nirsoft

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
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

Reads user/profile data of web browsers

spyware stealer

Accesses Microsoft Outlook accounts

collection
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1812 wrote to memory of 3044 N/A C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe
PID 1812 wrote to memory of 3044 N/A C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe
PID 1812 wrote to memory of 3044 N/A C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe
PID 1812 wrote to memory of 3044 N/A C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe
PID 1812 wrote to memory of 2600 N/A C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe
PID 1812 wrote to memory of 2600 N/A C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe
PID 1812 wrote to memory of 2600 N/A C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe
PID 1812 wrote to memory of 2600 N/A C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe
PID 1812 wrote to memory of 2608 N/A C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe
PID 1812 wrote to memory of 2608 N/A C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe
PID 1812 wrote to memory of 2608 N/A C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe
PID 1812 wrote to memory of 2608 N/A C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe

Processes

C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe

"C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe"

C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe

C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe /stext "C:\Users\Admin\AppData\Local\Temp\ungellvldck"

C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe

C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe /stext "C:\Users\Admin\AppData\Local\Temp\eptpedgerkckvn"

C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe

C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe /stext "C:\Users\Admin\AppData\Local\Temp\pjyhfwqgfsupxucrg"

Network

Country Destination Domain Proto
US 8.8.8.8:53 dave17.bumbleshrimp.com udp
NO 185.206.225.59:52182 dave17.bumbleshrimp.com tcp
NO 185.206.225.59:52182 dave17.bumbleshrimp.com tcp
US 8.8.8.8:53 geoplugin.net udp
NL 178.237.33.50:80 geoplugin.net tcp

Files

memory/2608-9-0x0000000000400000-0x0000000000424000-memory.dmp

memory/2608-17-0x0000000000400000-0x0000000000424000-memory.dmp

memory/2600-14-0x0000000000400000-0x0000000000462000-memory.dmp

memory/2608-11-0x0000000000400000-0x0000000000424000-memory.dmp

memory/3044-24-0x0000000000400000-0x0000000000478000-memory.dmp

memory/2600-8-0x0000000000400000-0x0000000000462000-memory.dmp

memory/3044-7-0x0000000000400000-0x0000000000478000-memory.dmp

memory/3044-13-0x0000000000400000-0x0000000000478000-memory.dmp

memory/2608-12-0x0000000000400000-0x0000000000424000-memory.dmp

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

MD5 f3b25701fe362ec84616a93a45ce9998
SHA1 d62636d8caec13f04e28442a0a6fa1afeb024bbb
SHA256 b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209
SHA512 98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

memory/3044-4-0x0000000000400000-0x0000000000478000-memory.dmp

memory/3044-1-0x0000000000400000-0x0000000000478000-memory.dmp

memory/2600-6-0x0000000000400000-0x0000000000462000-memory.dmp

memory/2600-3-0x0000000000400000-0x0000000000462000-memory.dmp

memory/2600-26-0x0000000000400000-0x0000000000462000-memory.dmp

memory/1812-32-0x0000000010000000-0x0000000010019000-memory.dmp

memory/1812-31-0x0000000010000000-0x0000000010019000-memory.dmp

memory/1812-28-0x0000000010000000-0x0000000010019000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-09 04:05

Reported

2024-05-09 04:07

Platform

win10v2004-20240426-en

Max time kernel

149s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe"

Signatures

Remcos

rat remcos

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

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

Nirsoft

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
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

Reads user/profile data of web browsers

spyware stealer

Accesses Microsoft Outlook accounts

collection
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe

"C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe"

C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe

C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe /stext "C:\Users\Admin\AppData\Local\Temp\jdgy"

C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe

C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe /stext "C:\Users\Admin\AppData\Local\Temp\uxmjgte"

C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe

C:\Users\Admin\AppData\Local\Temp\xIsAJb1izaR6.exe /stext "C:\Users\Admin\AppData\Local\Temp\ezzbhmpbuj"

Network

Country Destination Domain Proto
US 8.8.8.8:53 dave17.bumbleshrimp.com udp
NO 185.206.225.59:52182 dave17.bumbleshrimp.com tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 59.225.206.185.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
BE 2.17.196.137:443 www.bing.com tcp
NO 185.206.225.59:52182 dave17.bumbleshrimp.com tcp
US 8.8.8.8:53 geoplugin.net udp
NL 178.237.33.50:80 geoplugin.net tcp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 137.196.17.2.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 50.33.237.178.in-addr.arpa udp
US 8.8.8.8:53 67.31.126.40.in-addr.arpa udp
BE 2.17.196.137:443 www.bing.com tcp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 31.121.18.2.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 213.143.182.52.in-addr.arpa udp

Files

memory/2984-3-0x0000000000400000-0x0000000000462000-memory.dmp

memory/3720-5-0x0000000000400000-0x0000000000424000-memory.dmp

memory/3356-1-0x0000000000400000-0x0000000000478000-memory.dmp

memory/3720-17-0x0000000000400000-0x0000000000424000-memory.dmp

memory/3720-23-0x0000000000400000-0x0000000000424000-memory.dmp

memory/3720-19-0x0000000000430000-0x00000000004F9000-memory.dmp

memory/3356-11-0x0000000000400000-0x0000000000478000-memory.dmp

memory/3356-16-0x0000000000400000-0x0000000000478000-memory.dmp

memory/2984-15-0x0000000000400000-0x0000000000462000-memory.dmp

memory/2984-14-0x0000000000400000-0x0000000000462000-memory.dmp

memory/3356-12-0x0000000000400000-0x0000000000478000-memory.dmp

memory/3720-7-0x0000000000400000-0x0000000000424000-memory.dmp

memory/2984-10-0x0000000000400000-0x0000000000462000-memory.dmp

memory/2984-9-0x0000000000400000-0x0000000000462000-memory.dmp

memory/3356-26-0x0000000000400000-0x0000000000478000-memory.dmp

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

MD5 788d7419b32411807cc6753cbbccecbe
SHA1 761b99a1e5bc168f525181d78cff3f6ed82daa14
SHA256 76150e857b36f1f070422d2ad4df17f87454466348e4bfc158b028977378140b
SHA512 3003f104b0b07870015ff4e9e0d254c2e537d4c68ef664a772d7018827b0ccbeb5481a2ce587b88e6ab1d71d6ce523a620c11c00c676857d5fd5ab949fa617b4

memory/3528-34-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3528-33-0x0000000010000000-0x0000000010019000-memory.dmp

memory/3528-32-0x0000000010000000-0x0000000010019000-memory.dmp

memory/3528-29-0x0000000010000000-0x0000000010019000-memory.dmp

memory/3528-35-0x0000000000400000-0x0000000000482000-memory.dmp