Malware Analysis Report

2024-11-16 13:32

Sample ID 240620-2xr76a1gjh
Target zClient.exe
SHA256 124f53ea295796fa29c25aafdf6d28df18391bed960787da3a90e28abf44addc
Tags
xworm execution 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

124f53ea295796fa29c25aafdf6d28df18391bed960787da3a90e28abf44addc

Threat Level: Known bad

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

Malicious Activity Summary

xworm execution rat trojan

Xworm family

Detect Xworm Payload

Xworm

Command and Scripting Interpreter: PowerShell

Drops startup file

Loads dropped DLL

Checks computer location settings

Looks up external IP address via web service

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-20 22:58

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 22:58

Reported

2024-06-20 23:00

Platform

win7-20240611-en

Max time kernel

144s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\zClient.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\svhost.lnk C:\Users\Admin\AppData\Local\Temp\zClient.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svhost.lnk C:\Users\Admin\AppData\Local\Temp\zClient.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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2240 wrote to memory of 2752 N/A C:\Users\Admin\AppData\Local\Temp\zClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2240 wrote to memory of 2752 N/A C:\Users\Admin\AppData\Local\Temp\zClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2240 wrote to memory of 2752 N/A C:\Users\Admin\AppData\Local\Temp\zClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2240 wrote to memory of 2640 N/A C:\Users\Admin\AppData\Local\Temp\zClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2240 wrote to memory of 2640 N/A C:\Users\Admin\AppData\Local\Temp\zClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2240 wrote to memory of 2640 N/A C:\Users\Admin\AppData\Local\Temp\zClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2240 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\zClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2240 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\zClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2240 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\zClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2240 wrote to memory of 1812 N/A C:\Users\Admin\AppData\Local\Temp\zClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2240 wrote to memory of 1812 N/A C:\Users\Admin\AppData\Local\Temp\zClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2240 wrote to memory of 1812 N/A C:\Users\Admin\AppData\Local\Temp\zClient.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

Processes

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

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

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

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

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svhost.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 allow-enquiries.gl.at.ply.gg udp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp

Files

memory/2240-0-0x000007FEF6023000-0x000007FEF6024000-memory.dmp

memory/2240-1-0x0000000000C00000-0x0000000000C16000-memory.dmp

memory/2240-2-0x000007FEF6020000-0x000007FEF6A0C000-memory.dmp

memory/2752-7-0x000000001B2B0000-0x000000001B592000-memory.dmp

memory/2752-8-0x0000000002270000-0x0000000002278000-memory.dmp

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

MD5 78c7b4e017ef65bf2e1c93c75811d2a7
SHA1 e0efeafa9a86f12cf6dbcb5cfe7959db89828a25
SHA256 b98b5671664702af145663fbf9f6f430b3230f41e3769122f97df196e9feeef5
SHA512 612575007c490f457c8cc0064385349ae9c1bf132483c8efe8dbd0cb2ac3daf3e785b2de80e5695082136c04c76d6b58dcf55a33e6f4a53e9d4b0b030d216415

memory/2640-14-0x000000001B350000-0x000000001B632000-memory.dmp

memory/2640-15-0x0000000001F40000-0x0000000001F48000-memory.dmp

\??\PIPE\srvsvc

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

memory/2240-31-0x000007FEF6023000-0x000007FEF6024000-memory.dmp

memory/2240-32-0x000007FEF6020000-0x000007FEF6A0C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-20 22:58

Reported

2024-06-20 23:00

Platform

win10v2004-20240611-en

Max time kernel

148s

Max time network

151s

Command Line

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

Signatures

Detect Xworm Payload

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

Xworm

trojan rat xworm

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3169499791-3545231813-3156325206-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\zClient.exe N/A

Drops startup file

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

Loads dropped DLL

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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of SetWindowsHookEx

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

Processes

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

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

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

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

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 82.90.14.23.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 97.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.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 1.112.95.208.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 allow-enquiries.gl.at.ply.gg udp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp
US 8.8.8.8:53 20.221.185.147.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg 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 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp
US 147.185.221.20:33011 allow-enquiries.gl.at.ply.gg tcp

Files

memory/5008-0-0x00007FF8C7693000-0x00007FF8C7695000-memory.dmp

memory/5008-1-0x0000000000C50000-0x0000000000C66000-memory.dmp

memory/5008-2-0x00007FF8C7690000-0x00007FF8C8151000-memory.dmp

memory/1304-3-0x00007FF8C7690000-0x00007FF8C8151000-memory.dmp

memory/1304-10-0x0000023BA0D90000-0x0000023BA0DB2000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tbhesoy0.xxb.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/1304-9-0x00007FF8C7690000-0x00007FF8C8151000-memory.dmp

memory/1304-15-0x00007FF8C7690000-0x00007FF8C8151000-memory.dmp

memory/1304-18-0x00007FF8C7690000-0x00007FF8C8151000-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 77d622bb1a5b250869a3238b9bc1402b
SHA1 d47f4003c2554b9dfc4c16f22460b331886b191b
SHA256 f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb
SHA512 d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

MD5 e60eb305a7b2d9907488068b7065abd3
SHA1 1643dd7f915ac50c75bc01c53d68c5dafb9ce28d
SHA256 ad07460e061642c0dd4e7dfa7b821aacce873e290389e72f708e9f3504f9d135
SHA512 95c45afec6fa4e0b2a21edd10a6b2dc30568810c67bc9bc34d98ab111c48261f377a370583adb27e08616b0108026c119493b1b093b52ce931117e646b46cb7b

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

MD5 22310ad6749d8cc38284aa616efcd100
SHA1 440ef4a0a53bfa7c83fe84326a1dff4326dcb515
SHA256 55b1d8021c4eb4c3c0d75e3ed7a4eb30cd0123e3d69f32eeb596fe4ffec05abf
SHA512 2ef08e2ee15bb86695fe0c10533014ffed76ececc6e579d299d3365fafb7627f53e32e600bb6d872b9f58aca94f8cb7e1e94cdfd14777527f7f0aa019d9c6def

memory/1884-53-0x000001D743700000-0x000001D74391C000-memory.dmp

memory/5008-58-0x00007FF8C7693000-0x00007FF8C7695000-memory.dmp

memory/5008-59-0x00007FF8C7690000-0x00007FF8C8151000-memory.dmp

memory/5008-60-0x000000001D3D0000-0x000000001D40A000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmpD0BD.tmp

MD5 1b942faa8e8b1008a8c3c1004ba57349
SHA1 cd99977f6c1819b12b33240b784ca816dfe2cb91
SHA256 555ccb7ecd9ae52a75135fdd81ab443a49d5785b0621ed6468d28c4234e46ccc
SHA512 5aee3d59478d41ddd5885c99b394c9c4983064e2b3528db1a3f7fc289662bced4f57d072517bbe7573c6d1789435e987ef1aa9cc91f372bcfd30bc016675fa43

memory/5008-65-0x000000001D320000-0x000000001D32C000-memory.dmp