Malware Analysis Report

2024-09-22 07:05

Sample ID 240601-zzad1sfg66
Target feather.exe
SHA256 f4cbcc2254e8b74d272b7148322a08159d4e4293fa825cb7547e319fff13ca8d
Tags
asyncrat xworm default execution persistence rat trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

f4cbcc2254e8b74d272b7148322a08159d4e4293fa825cb7547e319fff13ca8d

Threat Level: Known bad

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

Malicious Activity Summary

asyncrat xworm default execution persistence rat trojan

Detect Xworm Payload

AsyncRat

Xworm

Async RAT payload

Command and Scripting Interpreter: PowerShell

Executes dropped EXE

Checks computer location settings

Drops startup file

Adds Run key to start application

Enumerates physical storage devices

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

Suspicious behavior: EnumeratesProcesses

Delays execution with timeout.exe

Creates scheduled task(s)

Suspicious use of AdjustPrivilegeToken

Uses Task Scheduler COM API

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-06-01 21:08

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-01 21:08

Reported

2024-06-01 21:23

Platform

win10v2004-20240508-en

Max time kernel

149s

Max time network

152s

Command Line

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

Signatures

AsyncRat

rat asyncrat

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

Async RAT payload

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

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\feather.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Roaming\XClient.exe N/A

Drops startup file

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\XClient.exe N/A
N/A N/A C:\Users\Admin\Runtime Broker.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Runtime Broker = "C:\\Users\\Admin\\Runtime Broker.exe" C:\Users\Admin\AppData\Roaming\XClient.exe N/A

Enumerates physical storage devices

Creates scheduled task(s)

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

Delays execution with timeout.exe

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

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\XClient.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\Client.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\XClient.exe N/A
Token: SeDebugPrivilege 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: SeDebugPrivilege 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: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\XClient.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\Runtime Broker.exe N/A

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4792 wrote to memory of 228 N/A C:\Users\Admin\AppData\Local\Temp\feather.exe C:\Users\Admin\AppData\Roaming\Client.exe
PID 4792 wrote to memory of 228 N/A C:\Users\Admin\AppData\Local\Temp\feather.exe C:\Users\Admin\AppData\Roaming\Client.exe
PID 4792 wrote to memory of 4056 N/A C:\Users\Admin\AppData\Local\Temp\feather.exe C:\Users\Admin\AppData\Roaming\XClient.exe
PID 4792 wrote to memory of 4056 N/A C:\Users\Admin\AppData\Local\Temp\feather.exe C:\Users\Admin\AppData\Roaming\XClient.exe
PID 4056 wrote to memory of 3116 N/A C:\Users\Admin\AppData\Roaming\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4056 wrote to memory of 3116 N/A C:\Users\Admin\AppData\Roaming\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4056 wrote to memory of 2556 N/A C:\Users\Admin\AppData\Roaming\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4056 wrote to memory of 2556 N/A C:\Users\Admin\AppData\Roaming\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4056 wrote to memory of 2544 N/A C:\Users\Admin\AppData\Roaming\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4056 wrote to memory of 2544 N/A C:\Users\Admin\AppData\Roaming\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4056 wrote to memory of 1876 N/A C:\Users\Admin\AppData\Roaming\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4056 wrote to memory of 1876 N/A C:\Users\Admin\AppData\Roaming\XClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4056 wrote to memory of 2020 N/A C:\Users\Admin\AppData\Roaming\XClient.exe C:\Windows\System32\schtasks.exe
PID 4056 wrote to memory of 2020 N/A C:\Users\Admin\AppData\Roaming\XClient.exe C:\Windows\System32\schtasks.exe
PID 4056 wrote to memory of 2908 N/A C:\Users\Admin\AppData\Roaming\XClient.exe C:\Windows\System32\schtasks.exe
PID 4056 wrote to memory of 2908 N/A C:\Users\Admin\AppData\Roaming\XClient.exe C:\Windows\System32\schtasks.exe
PID 4056 wrote to memory of 968 N/A C:\Users\Admin\AppData\Roaming\XClient.exe C:\Windows\system32\cmd.exe
PID 4056 wrote to memory of 968 N/A C:\Users\Admin\AppData\Roaming\XClient.exe C:\Windows\system32\cmd.exe
PID 968 wrote to memory of 4388 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 968 wrote to memory of 4388 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.exe

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

C:\Users\Admin\AppData\Roaming\Client.exe

"C:\Users\Admin\AppData\Roaming\Client.exe"

C:\Users\Admin\AppData\Roaming\XClient.exe

"C:\Users\Admin\AppData\Roaming\XClient.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\Roaming\XClient.exe'

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.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\Runtime Broker.exe'

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

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

C:\Windows\System32\schtasks.exe

"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Runtime Broker" /tr "C:\Users\Admin\Runtime Broker.exe"

C:\Users\Admin\Runtime Broker.exe

"C:\Users\Admin\Runtime Broker.exe"

C:\Windows\System32\schtasks.exe

"C:\Windows\System32\schtasks.exe" /delete /f /tn "Runtime Broker"

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC1AA.tmp.bat""

C:\Windows\system32\timeout.exe

timeout 3

C:\Windows\System32\rundll32.exe

C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding

Network

Country Destination Domain Proto
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
N/A 127.0.0.1:38173 tcp
US 8.8.8.8:53 203.107.17.2.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
N/A 127.0.0.1:38173 tcp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
N/A 127.0.0.1:38173 tcp
US 8.8.8.8:53 19.ip.gl.ply.gg udp
US 147.185.221.19:38173 19.ip.gl.ply.gg tcp
US 8.8.8.8:53 19.221.185.147.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
N/A 127.0.0.1:38173 tcp
US 147.185.221.19:38173 19.ip.gl.ply.gg tcp
N/A 127.0.0.1:38173 tcp
N/A 127.0.0.1:38173 tcp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
N/A 127.0.0.1:38173 tcp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
N/A 127.0.0.1:38173 tcp
N/A 127.0.0.1:38173 tcp
N/A 127.0.0.1:38173 tcp
N/A 127.0.0.1:38173 tcp
N/A 127.0.0.1:38173 tcp
N/A 127.0.0.1:38173 tcp
US 8.8.8.8:53 144.107.17.2.in-addr.arpa udp
N/A 127.0.0.1:38173 tcp
N/A 127.0.0.1:38173 tcp
N/A 127.0.0.1:38173 tcp
N/A 127.0.0.1:38173 tcp
N/A 127.0.0.1:38173 tcp
N/A 127.0.0.1:38173 tcp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp
N/A 127.0.0.1:38173 tcp
N/A 127.0.0.1:38173 tcp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
N/A 127.0.0.1:38173 tcp
N/A 127.0.0.1:38173 tcp
N/A 127.0.0.1:38173 tcp
N/A 127.0.0.1:38173 tcp
N/A 127.0.0.1:38173 tcp
N/A 127.0.0.1:38173 tcp
N/A 127.0.0.1:38173 tcp
N/A 127.0.0.1:38173 tcp
US 8.8.8.8:53 200.79.70.13.in-addr.arpa udp
N/A 127.0.0.1:38173 tcp

Files

memory/4792-0-0x00007FFDB32A3000-0x00007FFDB32A5000-memory.dmp

memory/4792-1-0x0000000000AD0000-0x0000000000B00000-memory.dmp

C:\Users\Admin\AppData\Roaming\Client.exe

MD5 f8ec02f0ad41f3e984037b398641f3bb
SHA1 88d64ad9840e65bcd5d27323a0fe2214d00d7346
SHA256 12cdd3df8d582bc30a49c2b4f8cf96d522e0f01d64f2e7df17276dc89fdb1a75
SHA512 31d177cceba0a3698f696c5daa0265ebe3fecf8a2a2934290e574789811a68c7313c1b0b40b1bae88666088c87fc9336941e10f26952a442c9cc3ca9637f5322

C:\Users\Admin\AppData\Roaming\XClient.exe

MD5 74fcef65a288af74b2a36dd6895264f8
SHA1 d5d73bb877f0aee6962f49c87603eec9d5b4846b
SHA256 ed308d6d8768d98145916f4529e0b444058105f401acf1e01bdacadf39a637b1
SHA512 c342445070326c126ae5841cc88a3cdcd2ae6bd995a37903ca6cacb517dc3ed7ada4c9fb7c020ad814824d2a5a29fd909da895c40475aec5ec6499778e25772a

memory/228-21-0x0000000000370000-0x0000000000388000-memory.dmp

memory/4056-27-0x0000000000C10000-0x0000000000C2A000-memory.dmp

memory/228-28-0x00007FFDB32A0000-0x00007FFDB3D61000-memory.dmp

memory/228-29-0x00007FFDB32A0000-0x00007FFDB3D61000-memory.dmp

memory/3116-30-0x000001ABD0B50000-0x000001ABD0B72000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_isarojeb.j4y.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

MD5 77d622bb1a5b250869a3238b9bc1402b
SHA1 d47f4003c2554b9dfc4c16f22460b331886b191b
SHA256 f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb
SHA512 d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

MD5 eb1ad317bd25b55b2bbdce8a28a74a94
SHA1 98a3978be4d10d62e7411946474579ee5bdc5ea6
SHA256 9e94e7c9ac6134ee30e79498558aa1a5a1ac79a643666c3f8922eed215dd3a98
SHA512 d011f266c0240d84470c0f9577cd9e4927309bd19bb38570ca9704ed8e1d159f9bea982a59d3eefef72ce7a10bd81208b82e88ef57c7af587f7437a89769adc0

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

MD5 cfb22e9b9c08bb1cfe944b622eb7adcb
SHA1 a299c701fb4da010999e61f9127262c7deb4fd97
SHA256 f60461e45422c16638ab514984d3a3b4e1ec8522c224543046a7d8fdf0090af2
SHA512 67962f0976a16c4323d14d4f7f6fe23bf1145db115be59b25f8fdfbe49d2d0672ed868ce7d69cb33b790f50f37b1187d5bd64fddfeb20260c88d4c5f75be4a57

memory/4056-83-0x000000001C150000-0x000000001C15C000-memory.dmp

memory/228-84-0x00007FFDB32A0000-0x00007FFDB3D61000-memory.dmp

memory/228-85-0x00007FFDB32A0000-0x00007FFDB3D61000-memory.dmp

memory/4056-91-0x000000001D040000-0x000000001D1E9000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmpC1AA.tmp.bat

MD5 3005df3314b5665a6046c3fb32c82f9d
SHA1 d227b8243351e347da81d6e94bf17ce321654b9b
SHA256 6006eb7c235beee1a8825d76167822447d0898bec732724dd1b1c54b8f3ae1af
SHA512 dd3dd0407fd7ccdbf38864742e70c8d6664833410af6cf6ab97b14db066828fa8857358f2281e9797a30f494a098a5a1075f2044e22a59d30296b938c2117977