Malware Analysis Report

2025-08-11 06:36

Sample ID 241016-blz6hsvfkf
Target 183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe
SHA256 183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8
Tags
collection discovery spyware stealer hiddenhost remcos
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

183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8

Threat Level: Known bad

The file 183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe was found to be: Known bad.

Malicious Activity Summary

collection discovery spyware stealer hiddenhost remcos

Remcos family

NirSoft MailPassView

Detected Nirsoft tools

NirSoft WebBrowserPassView

Reads user/profile data of web browsers

Accesses Microsoft Outlook accounts

Suspicious use of SetThreadContext

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-16 01:14

Signatures

Remcos family

remcos

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-16 01:14

Reported

2024-10-16 01:17

Platform

win7-20240903-en

Max time kernel

147s

Max time network

142s

Command Line

"C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe"

Signatures

Detected Nirsoft tools

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
N/A N/A N/A N/A
N/A N/A N/A N/A

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

Reads user/profile data of web browsers

spyware stealer

Accesses Microsoft Outlook accounts

collection
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.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\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2784 wrote to memory of 2812 N/A C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe
PID 2784 wrote to memory of 2812 N/A C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe
PID 2784 wrote to memory of 2812 N/A C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe
PID 2784 wrote to memory of 2812 N/A C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe
PID 2784 wrote to memory of 2948 N/A C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe
PID 2784 wrote to memory of 2948 N/A C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe
PID 2784 wrote to memory of 2948 N/A C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe
PID 2784 wrote to memory of 2948 N/A C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe
PID 2784 wrote to memory of 1540 N/A C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe
PID 2784 wrote to memory of 1540 N/A C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe
PID 2784 wrote to memory of 1540 N/A C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe
PID 2784 wrote to memory of 1540 N/A C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe

Processes

C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe

"C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe"

C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe

C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe /stext "C:\Users\Admin\AppData\Local\Temp\ijobcrwtcggkbiiunsnwdyn"

C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe

C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe /stext "C:\Users\Admin\AppData\Local\Temp\sduldbgnyoypdofywdzygliaevj"

C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe

C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe /stext "C:\Users\Admin\AppData\Local\Temp\vfzeeurpmwqunctcfnmzqycrfcblhu"

Network

Country Destination Domain Proto
US 204.10.160.167:63749 tcp
US 204.10.160.167:63749 tcp
US 8.8.8.8:53 geoplugin.net udp
NL 178.237.33.50:80 geoplugin.net tcp

Files

memory/2948-3-0x0000000000400000-0x0000000000462000-memory.dmp

memory/2812-1-0x0000000000400000-0x0000000000478000-memory.dmp

memory/2948-10-0x0000000000400000-0x0000000000462000-memory.dmp

memory/1540-13-0x0000000000400000-0x0000000000424000-memory.dmp

memory/1540-16-0x0000000000400000-0x0000000000424000-memory.dmp

memory/1540-15-0x0000000000400000-0x0000000000424000-memory.dmp

memory/1540-14-0x0000000000400000-0x0000000000424000-memory.dmp

memory/1540-11-0x0000000000400000-0x0000000000424000-memory.dmp

memory/2812-9-0x0000000000400000-0x0000000000478000-memory.dmp

memory/2948-8-0x0000000000400000-0x0000000000462000-memory.dmp

memory/2812-7-0x0000000000400000-0x0000000000478000-memory.dmp

memory/2948-6-0x0000000000400000-0x0000000000462000-memory.dmp

memory/2812-4-0x0000000000400000-0x0000000000478000-memory.dmp

memory/1540-17-0x0000000000400000-0x0000000000424000-memory.dmp

memory/2812-22-0x0000000000400000-0x0000000000478000-memory.dmp

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

MD5 f3b25701fe362ec84616a93a45ce9998
SHA1 d62636d8caec13f04e28442a0a6fa1afeb024bbb
SHA256 b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209
SHA512 98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

memory/2948-27-0x0000000000400000-0x0000000000462000-memory.dmp

memory/2784-29-0x0000000010000000-0x0000000010019000-memory.dmp

memory/2784-33-0x0000000010000000-0x0000000010019000-memory.dmp

memory/2784-32-0x0000000010000000-0x0000000010019000-memory.dmp

C:\ProgramData\rcbook\logs.dat

MD5 8d079871e25d090b49230ee68f817eba
SHA1 ffe67389ce76a2583b38dc8d043238300302a356
SHA256 e6e32f40af59cf6590b27433c2e1d690372a33bff3ba5a52c3b88ee0e2056a0f
SHA512 191ad184eb07f093501f56d9cee239feb4df04b46d72e747437ab4fbaa480612d1b4919d049687b50f581be5d4bbc35950b25f79f9d0716fb98d0b2c7dcd3658

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-16 01:14

Reported

2024-10-16 01:17

Platform

win10v2004-20241007-en

Max time kernel

150s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.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\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe

"C:\Users\Admin\AppData\Local\Temp\183c9170d34b3c5e322d5a34d26aaab2bd4acd5338230c4454dc45b6a605bfb8.exe"

Network

Country Destination Domain Proto
US 204.10.160.167:63749 tcp
US 8.8.8.8:53 167.160.10.204.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 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 71.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 50.33.237.178.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 98.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

C:\ProgramData\rcbook\logs.dat

MD5 d7546d56ae1d5d87d3d49ba29fdfce77
SHA1 287e2ed715b90990e0dc14eda11be1a4879b61b6
SHA256 18bfe8a43a255fe9f0588449dca2473c2c59bad7104aa1eec8aa30c8e1afc88a
SHA512 aae6f584c567d1e485222e01caa717188b4a37b27f00d6c8fcbfccc86938034cc57fcbca136dfd0a554457c3938c1d0e204781fe445eba73206acade0b83f2f6