Malware Analysis Report

2024-09-09 20:19

Sample ID 240613-1q1ehs1gkd
Target Shellbag anylizer.exe
SHA256 8f2d3eeab5e5d807acff4be9b7d6b41340f0c8a891baa094543d10e65ccec7f2
Tags
xworm execution persistence rat trojan evasion
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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

8f2d3eeab5e5d807acff4be9b7d6b41340f0c8a891baa094543d10e65ccec7f2

Threat Level: Known bad

The file Shellbag anylizer.exe was found to be: Known bad.

Malicious Activity Summary

xworm execution persistence rat trojan evasion

Detect Xworm Payload

Xworm

UAC bypass

Contains code to disable Windows Defender

Xworm family

Command and Scripting Interpreter: PowerShell

Disables Task Manager via registry modification

Drops startup file

Checks computer location settings

Adds Run key to start application

Legitimate hosting services abused for malware hosting/C2

Looks up external IP address via web service

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

System policy modification

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-06-13 21:51

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

2024-06-13 21:51

Reported

2024-06-13 21:54

Platform

win7-20240611-en

Max time kernel

118s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe"

Signatures

Detect Xworm Payload

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-39690363-730359138-1046745555-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Local\\Temp\\svchost.exe" C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe N/A

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A pastebin.com N/A N/A
N/A pastebin.com N/A N/A
N/A 2.tcp.eu.ngrok.io N/A 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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2416 wrote to memory of 2728 N/A C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2416 wrote to memory of 2728 N/A C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2416 wrote to memory of 2728 N/A C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2416 wrote to memory of 2680 N/A C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2416 wrote to memory of 2680 N/A C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2416 wrote to memory of 2680 N/A C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2416 wrote to memory of 2736 N/A C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2416 wrote to memory of 2736 N/A C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2416 wrote to memory of 2736 N/A C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2416 wrote to memory of 2308 N/A C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2416 wrote to memory of 2308 N/A C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2416 wrote to memory of 2308 N/A C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

Processes

C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe

"C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.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\Shellbag anylizer.exe'

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Shellbag anylizer.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\svchost.exe'

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

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

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 pastebin.com udp
US 104.20.4.235:443 pastebin.com tcp
US 8.8.8.8:53 2.tcp.eu.ngrok.io udp
DE 3.127.138.57:13904 2.tcp.eu.ngrok.io tcp

Files

memory/2416-0-0x000007FEF5BF3000-0x000007FEF5BF4000-memory.dmp

memory/2416-1-0x0000000000090000-0x00000000000A8000-memory.dmp

memory/2416-2-0x000007FEF5BF0000-0x000007FEF65DC000-memory.dmp

memory/2728-7-0x000000001B400000-0x000000001B6E2000-memory.dmp

memory/2728-8-0x0000000001D70000-0x0000000001D78000-memory.dmp

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

MD5 93d6c7ffe525a048e76ccc3838d3e5c1
SHA1 e21f68b0c70304a2f86c0f17a1f1b1d5596733d4
SHA256 3f4bda03b3d754b1b696a5e010de35fcf3c7751869898f5c5283aabaee49c03b
SHA512 777e1dba0d4f235d39288b42fb4c78268f69d80cb8dd0d959b94eaa6e29137172de83014a2e3897304ffc9314e1ed45c81431892a04a0e8ed448b83d2581b289

memory/2680-14-0x000000001B4A0000-0x000000001B782000-memory.dmp

memory/2680-15-0x0000000001FD0000-0x0000000001FD8000-memory.dmp

memory/2416-30-0x000007FEF5BF3000-0x000007FEF5BF4000-memory.dmp

memory/2416-31-0x000007FEF5BF0000-0x000007FEF65DC000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-13 21:51

Reported

2024-06-13 21:54

Platform

win10v2004-20240226-en

Max time kernel

141s

Max time network

156s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.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

UAC bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe N/A

Xworm

trojan rat xworm

Disables Task Manager via registry modification

evasion

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe N/A

Drops startup file

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Local\\Temp\\svchost.exe" C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe N/A

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A pastebin.com N/A N/A
N/A pastebin.com N/A N/A
N/A 2.tcp.eu.ngrok.io N/A 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

Suspicious use of AdjustPrivilegeToken

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

System policy modification

evasion
Description Indicator Process Target
Key created \REGISTRY\MACHINE\software\microsoft\windows\currentversion\policies\system C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe

"C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.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\Shellbag anylizer.exe'

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Shellbag anylizer.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\svchost.exe'

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

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

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3680 --field-trial-handle=2272,i,4858140932023865871,5726683989663339295,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
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 88.251.17.2.in-addr.arpa udp
US 8.8.8.8:53 1.112.95.208.in-addr.arpa udp
US 8.8.8.8:53 67.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 pastebin.com udp
US 104.20.4.235:443 pastebin.com tcp
US 8.8.8.8:53 235.4.20.104.in-addr.arpa udp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
GB 172.217.169.42:443 chromewebstore.googleapis.com tcp
US 8.8.8.8:53 pki.goog udp
US 8.8.8.8:53 pki.goog udp
US 216.239.32.29:80 pki.goog tcp
US 8.8.8.8:53 42.169.217.172.in-addr.arpa udp
US 8.8.8.8:53 29.32.239.216.in-addr.arpa udp
US 8.8.8.8:53 2.tcp.eu.ngrok.io udp
DE 18.192.93.86:13904 2.tcp.eu.ngrok.io tcp
US 8.8.8.8:53 86.93.192.18.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 57.15.31.184.in-addr.arpa udp
US 13.107.246.64:443 tcp
US 8.8.8.8:53 98.251.17.2.in-addr.arpa udp
DE 18.192.93.86:13904 2.tcp.eu.ngrok.io tcp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 17.173.189.20.in-addr.arpa udp

Files

memory/4268-0-0x00007FFDB9F93000-0x00007FFDB9F95000-memory.dmp

memory/4268-1-0x00000000003F0000-0x0000000000408000-memory.dmp

memory/4268-2-0x00007FFDB9F90000-0x00007FFDBAA51000-memory.dmp

memory/5020-3-0x00007FFDB9F90000-0x00007FFDBAA51000-memory.dmp

memory/5020-4-0x00007FFDB9F90000-0x00007FFDBAA51000-memory.dmp

memory/5020-5-0x00007FFDB9F90000-0x00007FFDBAA51000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_prnszzqo.h5u.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/5020-12-0x000001ECF9A10000-0x000001ECF9A32000-memory.dmp

memory/5020-16-0x00007FFDB9F90000-0x00007FFDBAA51000-memory.dmp

memory/5020-17-0x00007FFDB9F90000-0x00007FFDBAA51000-memory.dmp

memory/5020-20-0x00007FFDB9F90000-0x00007FFDBAA51000-memory.dmp

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 3a6bad9528f8e23fb5c77fbd81fa28e8
SHA1 f127317c3bc6407f536c0f0600dcbcf1aabfba36
SHA256 986366767de5873f1b170a63f2a33ce05132d1afd90c8f5017afbca8ef1beb05
SHA512 846002154a0ece6f3e9feda6f115d3161dc21b3789525dd62ae1d9188495171293efdbe7be4710666dd8a15e66b557315b5a02918a741ed1d5f3ff0c515b98e2

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

MD5 9bc110200117a3752313ca2acaf8a9e1
SHA1 fda6b7da2e7b0175b391475ca78d1b4cf2147cd3
SHA256 c88e4bbb64f7fa31429ebe82c1cf07785c44486f37576f783a26ac856e02a4eb
SHA512 1f1af32aa18a8cbfcc65b0d4fb7e6ca2705f125eaa85789e981ee68b90c64522e954825abf460d4b4f97567715dfae8d9b0a25a4d54d10bc4c257c472f2e80fb

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

MD5 3505effaead0f06d098f1aec01836881
SHA1 94bafdbeb2f5adbd8cec709574df5b8dbcc5eba3
SHA256 5d39a25ff8842c7c14aa14f99c5e3e1606fb7516c57f03dc41069df3c3de0517
SHA512 934d8eab5bc2ec20e800c668f3c3434829feade4771918a22d712f7ba39f91f93877a1e9dc1beac966646af0c9dd2cf118041535143b3abc585fea8dfb1299f5

memory/4268-58-0x00007FFDB9F93000-0x00007FFDB9F95000-memory.dmp

memory/4268-60-0x00007FFDB9F90000-0x00007FFDBAA51000-memory.dmp

memory/4268-62-0x0000000000AF0000-0x0000000000AFC000-memory.dmp

memory/4268-63-0x0000000000A30000-0x0000000000A3E000-memory.dmp