Analysis Overview
SHA256
8df716860dc2a2e82617b537f498dfdcce9dfbf43ce7f3ac6794228a8440fa00
Threat Level: Known bad
The file XClient.exe was found to be: Known bad.
Malicious Activity Summary
Detect Xworm Payload
Xworm
Xworm family
Checks computer location settings
Executes dropped EXE
Drops startup file
Adds Run key to start application
Looks up external IP address via web service
Unsigned PE
Enumerates physical storage devices
Uses Task Scheduler COM API
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Scheduled Task/Job: Scheduled Task
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-06-20 19:00
Signatures
Detect Xworm Payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Xworm family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-20 19:00
Reported
2024-06-20 19:03
Platform
win7-20231129-en
Max time kernel
148s
Max time network
128s
Command Line
Signatures
Detect Xworm Payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Xworm
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Windows Defender.lnk | C:\Users\Admin\AppData\Local\Temp\XClient.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Windows Defender.lnk | C:\Users\Admin\AppData\Local\Temp\XClient.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\Run\Windows Defender = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Windows Defender.exe" | C:\Users\Admin\AppData\Local\Temp\XClient.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
Scheduled Task/Job: Scheduled Task
| 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\XClient.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2392 wrote to memory of 2564 | N/A | C:\Users\Admin\AppData\Local\Temp\XClient.exe | C:\Windows\System32\schtasks.exe |
| PID 2392 wrote to memory of 2564 | N/A | C:\Users\Admin\AppData\Local\Temp\XClient.exe | C:\Windows\System32\schtasks.exe |
| PID 2392 wrote to memory of 2564 | N/A | C:\Users\Admin\AppData\Local\Temp\XClient.exe | C:\Windows\System32\schtasks.exe |
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Windows Defender" /tr "C:\Users\Admin\AppData\Local\Temp\Windows Defender.exe"
C:\Windows\system32\taskeng.exe
taskeng.exe {53E2A45F-ED68-4714-8FDA-7290776E84F7} S-1-5-21-3627615824-4061627003-3019543961-1000:SCFGBRBT\Admin:Interactive:[1]
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 |
| N/A | 192.168.56.1:8888 | tcp | |
| N/A | 192.168.56.1:8888 | tcp | |
| N/A | 192.168.56.1:8888 | tcp | |
| N/A | 127.0.0.1:8888 | tcp | |
| N/A | 127.0.0.1:8888 | tcp | |
| N/A | 127.0.0.1:8888 | tcp | |
| N/A | 192.168.56.1:8888 | tcp | |
| N/A | 127.0.0.1:8888 | tcp |
Files
memory/2392-0-0x000007FEF5043000-0x000007FEF5044000-memory.dmp
memory/2392-1-0x0000000000A40000-0x0000000000A54000-memory.dmp
memory/2392-2-0x000007FEF5040000-0x000007FEF5A2C000-memory.dmp
memory/2392-7-0x000007FEF5043000-0x000007FEF5044000-memory.dmp
memory/2392-8-0x000007FEF5040000-0x000007FEF5A2C000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-20 19:00
Reported
2024-06-20 19:03
Platform
win10v2004-20240508-en
Max time kernel
144s
Max time network
146s
Command Line
Signatures
Detect Xworm Payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Xworm
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\XClient.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Windows Defender.lnk | C:\Users\Admin\AppData\Local\Temp\XClient.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Windows Defender.lnk | C:\Users\Admin\AppData\Local\Temp\XClient.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Windows Defender.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Windows Defender.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Windows Defender.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Defender = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Windows Defender.exe" | C:\Users\Admin\AppData\Local\Temp\XClient.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
Scheduled Task/Job: Scheduled Task
| 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\XClient.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Windows Defender.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Windows Defender.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Windows Defender.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4628 wrote to memory of 1276 | N/A | C:\Users\Admin\AppData\Local\Temp\XClient.exe | C:\Windows\System32\schtasks.exe |
| PID 4628 wrote to memory of 1276 | N/A | C:\Users\Admin\AppData\Local\Temp\XClient.exe | C:\Windows\System32\schtasks.exe |
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Windows Defender" /tr "C:\Users\Admin\AppData\Local\Temp\Windows Defender.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 --field-trial-handle=4180,i,1999448010053300448,1112699187621658374,262144 --variations-seed-version --mojo-platform-channel-handle=4080 /prefetch:8
C:\Users\Admin\AppData\Local\Temp\Windows Defender.exe
"C:\Users\Admin\AppData\Local\Temp\Windows Defender.exe"
C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DisplayEnhancementService
C:\Users\Admin\AppData\Local\Temp\Windows Defender.exe
"C:\Users\Admin\AppData\Local\Temp\Windows Defender.exe"
C:\Users\Admin\AppData\Local\Temp\Windows Defender.exe
"C:\Users\Admin\AppData\Local\Temp\Windows Defender.exe"
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 | 183.142.211.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 73.144.22.2.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 | 138.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.86.106.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 1.112.95.208.in-addr.arpa | udp |
| N/A | 192.168.56.1:8888 | tcp | |
| US | 8.8.8.8:53 | 58.55.71.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | cxcs.microsoft.net | udp |
| CZ | 104.64.113.235:443 | cxcs.microsoft.net | tcp |
| NL | 23.62.61.194:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 194.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 235.113.64.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| N/A | 127.0.0.1:8888 | tcp | |
| N/A | 127.0.0.1:8888 | tcp | |
| US | 8.8.8.8:53 | 22.236.111.52.in-addr.arpa | udp |
| N/A | 127.0.0.1:8888 | tcp | |
| N/A | 127.0.0.1:8888 | tcp | |
| N/A | 192.168.56.1:8888 | tcp | |
| N/A | 127.0.0.1:8888 | tcp | |
| N/A | 127.0.0.1:8888 | tcp | |
| US | 8.8.8.8:53 | 201.64.52.20.in-addr.arpa | udp |
| N/A | 127.0.0.1:8888 | tcp | |
| N/A | 192.168.56.1:8888 | tcp |
Files
memory/4628-0-0x00007FFFE6243000-0x00007FFFE6245000-memory.dmp
memory/4628-1-0x0000000000860000-0x0000000000874000-memory.dmp
memory/4628-2-0x00007FFFE6240000-0x00007FFFE6D01000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\Windows Defender.exe
| MD5 | 76b95ef6259dbde70d6b8b031d19aaf4 |
| SHA1 | 99a7c78521b12d54442f512f10d2a819c261a7bc |
| SHA256 | 8df716860dc2a2e82617b537f498dfdcce9dfbf43ce7f3ac6794228a8440fa00 |
| SHA512 | 124a90716a6020fffa734ed87bc0f6ffc92b8c172b8c4e595d95b633ca3b98d2f31729ca4bc2f441848da92428fc84468ab538735e5daec19488170aa0fbb173 |
memory/4628-9-0x00007FFFE6243000-0x00007FFFE6245000-memory.dmp
memory/4856-10-0x00007FFFE6240000-0x00007FFFE6D01000-memory.dmp
memory/4856-12-0x00007FFFE6240000-0x00007FFFE6D01000-memory.dmp
memory/4628-13-0x00007FFFE6240000-0x00007FFFE6D01000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Windows Defender.exe.log
| MD5 | 2ff39f6c7249774be85fd60a8f9a245e |
| SHA1 | 684ff36b31aedc1e587c8496c02722c6698c1c4e |
| SHA256 | e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced |
| SHA512 | 1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1 |