Malware Analysis Report

2024-10-19 07:51

Sample ID 240813-qse69a1bnm
Target fnfnayeemsirmod.exe
SHA256 b85d7c34416d1790525a95f190a2ede356e611659c1199c31de24c2e1c10171e
Tags
xenorat discovery rat trojan
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

b85d7c34416d1790525a95f190a2ede356e611659c1199c31de24c2e1c10171e

Threat Level: Known bad

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

Malicious Activity Summary

xenorat discovery rat trojan

XenorRat

Xenorat family

Executes dropped EXE

Checks computer location settings

Loads dropped DLL

Unsigned PE

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Scheduled Task/Job: Scheduled Task

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-13 13:31

Signatures

Xenorat family

xenorat

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-13 13:31

Reported

2024-08-13 13:33

Platform

win7-20240729-en

Max time kernel

148s

Max time network

17s

Command Line

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

Signatures

XenorRat

trojan rat xenorat

Executes dropped EXE

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

Loads dropped DLL

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

Enumerates physical storage devices

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\fnfnayeemsirmod.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Roaming\XenoManager\fnfnayeemsirmod.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\schtasks.exe N/A

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\schtasks.exe N/A

Processes

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

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

C:\Users\Admin\AppData\Roaming\XenoManager\fnfnayeemsirmod.exe

"C:\Users\Admin\AppData\Roaming\XenoManager\fnfnayeemsirmod.exe"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /Create /TN "macchanger" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6567.tmp" /F

Network

Country Destination Domain Proto
N/A 127.0.0.1:4444 tcp
N/A 127.0.0.1:4444 tcp
N/A 127.0.0.1:4444 tcp
N/A 127.0.0.1:4444 tcp
N/A 127.0.0.1:4444 tcp
N/A 127.0.0.1:4444 tcp
N/A 127.0.0.1:4444 tcp
N/A 127.0.0.1:4444 tcp
N/A 127.0.0.1:4444 tcp
N/A 127.0.0.1:4444 tcp
N/A 127.0.0.1:4444 tcp
N/A 127.0.0.1:4444 tcp
N/A 127.0.0.1:4444 tcp
N/A 127.0.0.1:4444 tcp

Files

memory/1720-0-0x0000000074B6E000-0x0000000074B6F000-memory.dmp

memory/1720-1-0x00000000008A0000-0x00000000008B0000-memory.dmp

C:\Users\Admin\AppData\Roaming\XenoManager\fnfnayeemsirmod.exe

MD5 b882799bf2bfee26b5f7c11dc6788134
SHA1 6e7550054253349e498b5399ba8539036adb2e1f
SHA256 b85d7c34416d1790525a95f190a2ede356e611659c1199c31de24c2e1c10171e
SHA512 5f918b654a663d7eec78fc71d48f3bbf91ffca8538f2a9a0f3f172f35cfa93af98f690edb77a44d2c8f8dcadcbf46e272780ba194cf634490b11a75b3b9f8689

memory/1448-9-0x0000000073C3E000-0x0000000073C3F000-memory.dmp

memory/1448-10-0x0000000000A60000-0x0000000000A70000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp6567.tmp

MD5 5955984e9807564d0056c4d592639075
SHA1 cb3d1cc966850f755e3d4d806b9876c616570672
SHA256 d4e4be3941aac26e06757bacdc317bd943fe62fbd1509be0e26350ccda831c1c
SHA512 72dab97ff2d8d19f976dc20c7bb83543c5f2079d41fbb6bdb81fdac43084ebc4afc9edca4ddc81f2042c322ef4f7344f1868d57de01ee9ec82eaa0ffff787570

memory/1448-13-0x0000000073C30000-0x000000007431E000-memory.dmp

memory/1448-14-0x0000000073C30000-0x000000007431E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-13 13:31

Reported

2024-08-13 13:33

Platform

win10v2004-20240802-en

Max time kernel

149s

Max time network

130s

Command Line

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

Signatures

XenorRat

trojan rat xenorat

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\fnfnayeemsirmod.exe N/A

Executes dropped EXE

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

Enumerates physical storage devices

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\fnfnayeemsirmod.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Roaming\XenoManager\fnfnayeemsirmod.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\schtasks.exe N/A

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\schtasks.exe N/A

Processes

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

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

C:\Users\Admin\AppData\Roaming\XenoManager\fnfnayeemsirmod.exe

"C:\Users\Admin\AppData\Roaming\XenoManager\fnfnayeemsirmod.exe"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /Create /TN "macchanger" /XML "C:\Users\Admin\AppData\Local\Temp\tmp979C.tmp" /F

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
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 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
N/A 127.0.0.1:4444 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
N/A 127.0.0.1:4444 tcp
N/A 127.0.0.1:4444 tcp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 65.139.73.23.in-addr.arpa udp
N/A 127.0.0.1:4444 tcp
N/A 127.0.0.1:4444 tcp
US 8.8.8.8:53 39.58.20.217.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
N/A 127.0.0.1:4444 tcp
N/A 127.0.0.1:4444 tcp
N/A 127.0.0.1:4444 tcp
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
N/A 127.0.0.1:4444 tcp
N/A 127.0.0.1:4444 tcp
N/A 127.0.0.1:4444 tcp
N/A 127.0.0.1:4444 tcp
N/A 127.0.0.1:4444 tcp

Files

memory/2004-0-0x0000000074DCE000-0x0000000074DCF000-memory.dmp

memory/2004-1-0x0000000000E00000-0x0000000000E10000-memory.dmp

C:\Users\Admin\AppData\Roaming\XenoManager\fnfnayeemsirmod.exe

MD5 b882799bf2bfee26b5f7c11dc6788134
SHA1 6e7550054253349e498b5399ba8539036adb2e1f
SHA256 b85d7c34416d1790525a95f190a2ede356e611659c1199c31de24c2e1c10171e
SHA512 5f918b654a663d7eec78fc71d48f3bbf91ffca8538f2a9a0f3f172f35cfa93af98f690edb77a44d2c8f8dcadcbf46e272780ba194cf634490b11a75b3b9f8689

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\fnfnayeemsirmod.exe.log

MD5 916851e072fbabc4796d8916c5131092
SHA1 d48a602229a690c512d5fdaf4c8d77547a88e7a2
SHA256 7e750c904c43d27c89e55af809a679a96c0bb63fc511006ffbceffc2c7f6fb7d
SHA512 07ce4c881d6c411cac0b62364377e77950797c486804fb10d00555458716e3c47b1efc0d1f37e4cc3b7e6565bb402ca01c7ea8c963f9f9ace941a6e3883d2521

memory/1020-15-0x0000000074DC0000-0x0000000075570000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp979C.tmp

MD5 5955984e9807564d0056c4d592639075
SHA1 cb3d1cc966850f755e3d4d806b9876c616570672
SHA256 d4e4be3941aac26e06757bacdc317bd943fe62fbd1509be0e26350ccda831c1c
SHA512 72dab97ff2d8d19f976dc20c7bb83543c5f2079d41fbb6bdb81fdac43084ebc4afc9edca4ddc81f2042c322ef4f7344f1868d57de01ee9ec82eaa0ffff787570

memory/1020-18-0x0000000074DC0000-0x0000000075570000-memory.dmp

memory/1020-19-0x0000000074DC0000-0x0000000075570000-memory.dmp