Malware Analysis Report

2024-11-16 13:32

Sample ID 240620-yns7bavflc
Target Feather Nowy.exe
SHA256 66116a575982dc2aafaa6dda428fd3b3f273b9a9b1d7e0ed789983a1c16d4c47
Tags
xworm execution persistence 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 Overview

score
10/10

SHA256

66116a575982dc2aafaa6dda428fd3b3f273b9a9b1d7e0ed789983a1c16d4c47

Threat Level: Known bad

The file Feather Nowy.exe was found to be: Known bad.

Malicious Activity Summary

xworm execution persistence rat trojan

Detect Xworm Payload

Xworm

Xworm family

Contains code to disable Windows Defender

Command and Scripting Interpreter: PowerShell

Drops startup file

Executes dropped EXE

Looks up external IP address via web service

Adds Run key to start application

Unsigned PE

Enumerates physical storage devices

Scheduled Task/Job: Scheduled Task

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Delays execution with timeout.exe

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-20 19:56

Signatures

Detect Xworm Payload

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

Xworm family

xworm

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-20 19:56

Reported

2024-06-20 19:58

Platform

win10-20240404-en

Max time kernel

134s

Max time network

136s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Feather Nowy.exe"

Signatures

Contains code to disable Windows Defender

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

Detect Xworm Payload

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

Xworm

trojan rat xworm

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Nowy Feather.lnk C:\Users\Admin\AppData\Local\Temp\Feather Nowy.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Nowy Feather.lnk C:\Users\Admin\AppData\Local\Temp\Feather Nowy.exe N/A

Executes dropped EXE

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3699363923-1875576828-3287151903-1000\Software\Microsoft\Windows\CurrentVersion\Run\Nowy Feather = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Nowy Feather.exe" C:\Users\Admin\AppData\Local\Temp\Feather Nowy.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A ip-api.com N/A N/A

Enumerates physical storage devices

Delays execution with timeout.exe

evasion
Description Indicator Process Target
N/A N/A C:\Windows\system32\timeout.exe N/A

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Feather Nowy.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: 33 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: 34 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: 35 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: 36 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: 33 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: 34 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: 35 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: 36 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: 33 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 224 wrote to memory of 2120 N/A C:\Users\Admin\AppData\Local\Temp\Feather Nowy.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 224 wrote to memory of 2120 N/A C:\Users\Admin\AppData\Local\Temp\Feather Nowy.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 224 wrote to memory of 1668 N/A C:\Users\Admin\AppData\Local\Temp\Feather Nowy.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 224 wrote to memory of 1668 N/A C:\Users\Admin\AppData\Local\Temp\Feather Nowy.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 224 wrote to memory of 2056 N/A C:\Users\Admin\AppData\Local\Temp\Feather Nowy.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 224 wrote to memory of 2056 N/A C:\Users\Admin\AppData\Local\Temp\Feather Nowy.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 224 wrote to memory of 2772 N/A C:\Users\Admin\AppData\Local\Temp\Feather Nowy.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 224 wrote to memory of 2772 N/A C:\Users\Admin\AppData\Local\Temp\Feather Nowy.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 224 wrote to memory of 972 N/A C:\Users\Admin\AppData\Local\Temp\Feather Nowy.exe C:\Windows\System32\schtasks.exe
PID 224 wrote to memory of 972 N/A C:\Users\Admin\AppData\Local\Temp\Feather Nowy.exe C:\Windows\System32\schtasks.exe
PID 224 wrote to memory of 3428 N/A C:\Users\Admin\AppData\Local\Temp\Feather Nowy.exe C:\Windows\System32\schtasks.exe
PID 224 wrote to memory of 3428 N/A C:\Users\Admin\AppData\Local\Temp\Feather Nowy.exe C:\Windows\System32\schtasks.exe
PID 224 wrote to memory of 1040 N/A C:\Users\Admin\AppData\Local\Temp\Feather Nowy.exe C:\Windows\system32\cmd.exe
PID 224 wrote to memory of 1040 N/A C:\Users\Admin\AppData\Local\Temp\Feather Nowy.exe C:\Windows\system32\cmd.exe
PID 1040 wrote to memory of 776 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 1040 wrote to memory of 776 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\Feather Nowy.exe

"C:\Users\Admin\AppData\Local\Temp\Feather Nowy.exe"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Feather Nowy.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Feather Nowy.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Nowy Feather.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Nowy Feather.exe'

C:\Windows\System32\schtasks.exe

"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Nowy Feather" /tr "C:\Users\Admin\AppData\Local\Temp\Nowy Feather.exe"

C:\Users\Admin\AppData\Local\Temp\Nowy Feather.exe

"C:\Users\Admin\AppData\Local\Temp\Nowy Feather.exe"

C:\Users\Admin\AppData\Local\Temp\Nowy Feather.exe

"C:\Users\Admin\AppData\Local\Temp\Nowy Feather.exe"

C:\Windows\System32\schtasks.exe

"C:\Windows\System32\schtasks.exe" /delete /f /tn "Nowy Feather"

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB51.tmp.bat""

C:\Windows\system32\timeout.exe

timeout 3

Network

Country Destination Domain Proto
US 8.8.8.8:53 ip-api.com udp
US 208.95.112.1:80 ip-api.com tcp
US 8.8.8.8:53 1.112.95.208.in-addr.arpa udp
N/A 127.0.0.1:33694 tcp
US 8.8.8.8:53 lake-french.gl.at.ply.gg udp
US 147.185.221.20:33694 lake-french.gl.at.ply.gg tcp
US 8.8.8.8:53 20.221.185.147.in-addr.arpa udp
US 147.185.221.20:33694 lake-french.gl.at.ply.gg tcp
US 147.185.221.20:33694 lake-french.gl.at.ply.gg tcp
US 147.185.221.20:33694 lake-french.gl.at.ply.gg tcp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 195.98.74.40.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp

Files

memory/224-1-0x0000000000BD0000-0x0000000000C02000-memory.dmp

memory/224-0-0x00007FFA9F7A3000-0x00007FFA9F7A4000-memory.dmp

memory/224-2-0x00007FFA9F7A0000-0x00007FFAA018C000-memory.dmp

memory/2120-7-0x00007FFA9F7A0000-0x00007FFAA018C000-memory.dmp

memory/2120-8-0x000001EF6FFA0000-0x000001EF6FFC2000-memory.dmp

memory/2120-9-0x00007FFA9F7A0000-0x00007FFAA018C000-memory.dmp

memory/2120-13-0x000001EF70150000-0x000001EF701C6000-memory.dmp

memory/2120-12-0x00007FFA9F7A0000-0x00007FFAA018C000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fpgnr5zn.xgx.ps1

MD5 c4ca4238a0b923820dcc509a6f75849b
SHA1 356a192b7913b04c54574d18c28d46e6395428ab
SHA256 6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b
SHA512 4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

memory/2120-51-0x00007FFA9F7A0000-0x00007FFAA018C000-memory.dmp

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

MD5 ad5cd538ca58cb28ede39c108acb5785
SHA1 1ae910026f3dbe90ed025e9e96ead2b5399be877
SHA256 c9e6cb04d6c893458d5a7e12eb575cf97c3172f5e312b1f63a667cbbc5f0c033
SHA512 c066c5d9b276a68fa636647bb29aea05bfa2292217bc77f5324d9c1d93117772ee8277e1f7cff91ec8d6b7c05ca078f929cecfdbb09582522a9067f54740af13

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 092012581b38cacd04073f0befea943a
SHA1 3ae45afb2d715f74dabd25d0c1036e2d1ab13d24
SHA256 e4f55f299bd74de0c8da82b4ed70a87053a89a785b84c694ed4008bcad0b7d43
SHA512 4d305282639e627c7708b2fca9601d4c2436e213fe14a53452f76fc3407c12cc7590628e7ff2e589445ba9bd1cb03c4b210a52e320cbb6c123abff4115490873

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 38cfd78e89066e6ab3b5e8953fd169ad
SHA1 403f753f985ec352f49e7a1832cae21198f976c2
SHA256 cea5301c14003508fe49e19fd7866acfbb9c4219dd7e223d3d24282c841c630c
SHA512 ef00224e9ce314c37aba7965f7cc039df06c47564db02c42871a211392b04690538a314e19de6e12c984003136d7e92aca2373e7df24663b6fcf10ef5f55e96b

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 e944d8ee8a5557d6e25cf3f4cece7aa9
SHA1 6fa9069cebcee3cf3f085cb96732f0bb93771632
SHA256 28562b131a06fef11d4ef40596db13cc7b00037060af38c9d75140ed779eec84
SHA512 abb5a90c459f6eac6aa3fed70efda59e99f6e5f12f33dea4512a27b0093bf40ed02a7e353d2dec7dfe933a47afd00857195c5dddff2c3512986edca1771f55ae

memory/224-186-0x00007FFA9F7A3000-0x00007FFA9F7A4000-memory.dmp

memory/224-187-0x00007FFA9F7A0000-0x00007FFAA018C000-memory.dmp

memory/224-188-0x000000001B8F0000-0x000000001B8FA000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\Nowy Feather.exe

MD5 cc40307c984c4da5778486f9f8e490d0
SHA1 e0d09dd90cd8e6f2ac21bd91e7003c9bc0a15355
SHA256 66116a575982dc2aafaa6dda428fd3b3f273b9a9b1d7e0ed789983a1c16d4c47
SHA512 ec50078cb9d4cbbf29242a567b1b39e679676cead105e3babb73d20f3d09acf0a83f10e2ba73208dada2e34dea13f16df7ff1c919cee40fe9c1fc3b3cb4d81e4

memory/224-192-0x000000001B900000-0x000000001B90A000-memory.dmp

memory/224-193-0x000000001C560000-0x000000001C56E000-memory.dmp

memory/224-195-0x00000000012D0000-0x00000000012DC000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Nowy Feather.exe.log

MD5 16c5fce5f7230eea11598ec11ed42862
SHA1 75392d4824706090f5e8907eee1059349c927600
SHA256 87ba77c13905298acbac72be90949c4fe0755b6eff9777615aa37f252515f151
SHA512 153edd6da59beea6cc411ed7383c32916425d6ebb65f04c65aab7c1d6b25443d143aa8449aa92149de0ad8a975f6ecaa60f9f7574536eec6b38fe5fd3a6c6adc

memory/224-203-0x00007FFA9F7A0000-0x00007FFAA018C000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmpB51.tmp.bat

MD5 01d79f339e472fc2bf00d69b9ea4a540
SHA1 448af1fcbc738ed7e4a5695d8c1f3c5f7dd4fcc2
SHA256 9b4161122eea5a519725c68b6836ea2365716193002ad5cde3dd7e2f93e87d71
SHA512 8f2d2391de97fa3f45c329be19864979228069960825bc90042bf695aebec010a24f945fb76d3871324eceb4f413dc24ea0b72e33a0dcc712d74815dea130d1e