Analysis Overview
SHA256
ccf87c21e3783012b150a710bf7007ea3aac1b3cb6d2855a1fd78b40f0175da9
Threat Level: Known bad
The file sem.exe was found to be: Known bad.
Malicious Activity Summary
Detect Xworm Payload
Xworm family
Xworm
Command and Scripting Interpreter: PowerShell
Executes dropped EXE
Checks computer location settings
Drops startup file
Adds Run key to start application
Unsigned PE
Enumerates physical storage devices
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Creates scheduled task(s)
Suspicious use of AdjustPrivilegeToken
Uses Task Scheduler COM API
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-27 10:18
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
2024-05-27 10:18
Reported
2024-05-27 10:20
Platform
win7-20240508-en
Max time kernel
145s
Max time network
148s
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 |
| N/A | N/A | N/A | N/A |
Xworm
Command and Scripting Interpreter: PowerShell
| Description | Indicator | Process | Target |
| 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 |
Drops startup file
| Description | Indicator | Process | Target |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sys.lnk | C:\Users\Admin\AppData\Local\Temp\sem.exe | N/A |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sys.lnk | C:\Users\Admin\AppData\Local\Temp\sem.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\sys.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\sys.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000\Software\Microsoft\Windows\CurrentVersion\Run\sys = "C:\\Users\\Admin\\AppData\\Roaming\\sys.exe" | C:\Users\Admin\AppData\Local\Temp\sem.exe | N/A |
Enumerates physical storage devices
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\System32\schtasks.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| 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\Local\Temp\sem.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\sem.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\sem.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\sys.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\sys.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\sem.exe | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\sem.exe
"C:\Users\Admin\AppData\Local\Temp\sem.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\sem.exe'
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'sem.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\sys.exe'
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'sys.exe'
C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "sys" /tr "C:\Users\Admin\AppData\Roaming\sys.exe"
C:\Windows\system32\taskeng.exe
taskeng.exe {55999861-B192-4254-9BB5-AA81D236EFB2} S-1-5-21-268080393-3149932598-1824759070-1000:UHRQKJCP\Admin:Interactive:[1]
C:\Users\Admin\AppData\Roaming\sys.exe
C:\Users\Admin\AppData\Roaming\sys.exe
C:\Users\Admin\AppData\Roaming\sys.exe
C:\Users\Admin\AppData\Roaming\sys.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | sent-down.gl.at.ply.gg | udp |
| US | 147.185.221.16:2905 | sent-down.gl.at.ply.gg | tcp |
| US | 147.185.221.16:2905 | sent-down.gl.at.ply.gg | tcp |
| US | 147.185.221.16:2905 | sent-down.gl.at.ply.gg | tcp |
| US | 147.185.221.16:2905 | sent-down.gl.at.ply.gg | tcp |
| US | 147.185.221.16:2905 | sent-down.gl.at.ply.gg | tcp |
| US | 147.185.221.16:2905 | sent-down.gl.at.ply.gg | tcp |
Files
memory/3000-0-0x000007FEF5373000-0x000007FEF5374000-memory.dmp
memory/3000-1-0x0000000000890000-0x00000000008AA000-memory.dmp
memory/3068-6-0x0000000002CA0000-0x0000000002D20000-memory.dmp
memory/3068-7-0x000000001B660000-0x000000001B942000-memory.dmp
memory/3068-8-0x0000000001E80000-0x0000000001E88000-memory.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
| MD5 | 9dc73c7c534b2da26c940f5a6683ac43 |
| SHA1 | 50ef585af35a3ee4f88d1c6c96440be307bf411c |
| SHA256 | 51d18eab2f1207bf2ac6a28288f1dc897796163e00ea7381d3e1a14e5adc35c1 |
| SHA512 | b06e05887c24317b5b6e6fbfea05d8137699d346cf49a935cffb12cd423015b859154fca74dd449bb453704632d809f1adf8e0715cd85eee9ba7ae4c9e002637 |
memory/2664-14-0x000000001B760000-0x000000001BA42000-memory.dmp
memory/2664-15-0x0000000001E10000-0x0000000001E18000-memory.dmp
\??\PIPE\srvsvc
| MD5 | d41d8cd98f00b204e9800998ecf8427e |
| SHA1 | da39a3ee5e6b4b0d3255bfef95601890afd80709 |
| SHA256 | e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 |
| SHA512 | cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e |
memory/3000-31-0x0000000000430000-0x00000000004B0000-memory.dmp
memory/3000-32-0x000007FEF5373000-0x000007FEF5374000-memory.dmp
memory/3000-33-0x0000000000430000-0x00000000004B0000-memory.dmp
C:\Users\Admin\AppData\Roaming\sys.exe
| MD5 | 15966aaa6973e8710c21dbb9d232a5f2 |
| SHA1 | 99436fb15633ea4331872cacdcbde492df30dda1 |
| SHA256 | ccf87c21e3783012b150a710bf7007ea3aac1b3cb6d2855a1fd78b40f0175da9 |
| SHA512 | f35926607346f3472268a3c4f3106a929470211d47bd58230ac3e432208af204e4350a56fe7ec80865fbe80809c32a034cf356ce4db96fb57be6e9cf55da85fd |
memory/2720-37-0x0000000000E20000-0x0000000000E3A000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-05-27 10:18
Reported
2024-05-27 10:20
Platform
win10v2004-20240508-en
Max time kernel
134s
Max time network
144s
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
Command and Scripting Interpreter: PowerShell
| Description | Indicator | Process | Target |
| 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 |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\sem.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sys.lnk | C:\Users\Admin\AppData\Local\Temp\sem.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sys.lnk | C:\Users\Admin\AppData\Local\Temp\sem.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\sys.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\sys.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sys = "C:\\Users\\Admin\\AppData\\Roaming\\sys.exe" | C:\Users\Admin\AppData\Local\Temp\sem.exe | N/A |
Enumerates physical storage devices
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\System32\schtasks.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| 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\Local\Temp\sem.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\sem.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\sem.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\sys.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\sys.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\sem.exe | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\sem.exe
"C:\Users\Admin\AppData\Local\Temp\sem.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\sem.exe'
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'sem.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\sys.exe'
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'sys.exe'
C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "sys" /tr "C:\Users\Admin\AppData\Roaming\sys.exe"
C:\Users\Admin\AppData\Roaming\sys.exe
C:\Users\Admin\AppData\Roaming\sys.exe
C:\Users\Admin\AppData\Roaming\sys.exe
C:\Users\Admin\AppData\Roaming\sys.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.24.18.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 72.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| NL | 23.62.61.139:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 139.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | sent-down.gl.at.ply.gg | udp |
| US | 147.185.221.16:2905 | sent-down.gl.at.ply.gg | tcp |
| US | 8.8.8.8:53 | 154.239.44.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| US | 147.185.221.16:2905 | sent-down.gl.at.ply.gg | tcp |
| US | 147.185.221.16:2905 | sent-down.gl.at.ply.gg | tcp |
| US | 8.8.8.8:53 | 21.236.111.52.in-addr.arpa | udp |
| US | 147.185.221.16:2905 | sent-down.gl.at.ply.gg | tcp |
| US | 147.185.221.16:2905 | sent-down.gl.at.ply.gg | tcp |
Files
memory/2600-0-0x00007FF8B17D3000-0x00007FF8B17D5000-memory.dmp
memory/2600-1-0x00000000001A0000-0x00000000001BA000-memory.dmp
memory/2088-11-0x0000014D6F9A0000-0x0000014D6F9C2000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1fd5dpra.yvs.psm1
| MD5 | d17fe0a3f47be24a6453e9ef58c94641 |
| SHA1 | 6ab83620379fc69f80c0242105ddffd7d98d5d9d |
| SHA256 | 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7 |
| SHA512 | 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82 |
memory/2088-12-0x00007FF8B17D0000-0x00007FF8B2291000-memory.dmp
memory/2088-13-0x00007FF8B17D0000-0x00007FF8B2291000-memory.dmp
memory/2088-14-0x00007FF8B17D0000-0x00007FF8B2291000-memory.dmp
memory/2088-17-0x00007FF8B17D0000-0x00007FF8B2291000-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 | 6d3e9c29fe44e90aae6ed30ccf799ca8 |
| SHA1 | c7974ef72264bbdf13a2793ccf1aed11bc565dce |
| SHA256 | 2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d |
| SHA512 | 60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a |
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 | 31021d3765d703e67414edc3a3ba6100 |
| SHA1 | c0f9e120ac9090318c7c5b7bcb507c3c79b97777 |
| SHA256 | a2f3652121ade79e390072d5e35116a7287a82b21442a68724b776090930b513 |
| SHA512 | af844b43ea0829537d574ecc1ad643e2e88c036f4a2fd3f35f7177a8a407e1ab1ca21d1e935346ebe7575f1766a5c2723409f32593e872908997187a5cf1e606 |
memory/2600-56-0x00007FF8B17D0000-0x00007FF8B2291000-memory.dmp
memory/2600-57-0x00007FF8B17D3000-0x00007FF8B17D5000-memory.dmp
memory/2600-58-0x00007FF8B17D0000-0x00007FF8B2291000-memory.dmp
C:\Users\Admin\AppData\Roaming\sys.exe
| MD5 | 15966aaa6973e8710c21dbb9d232a5f2 |
| SHA1 | 99436fb15633ea4331872cacdcbde492df30dda1 |
| SHA256 | ccf87c21e3783012b150a710bf7007ea3aac1b3cb6d2855a1fd78b40f0175da9 |
| SHA512 | f35926607346f3472268a3c4f3106a929470211d47bd58230ac3e432208af204e4350a56fe7ec80865fbe80809c32a034cf356ce4db96fb57be6e9cf55da85fd |
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\sys.exe.log
| MD5 | 2ff39f6c7249774be85fd60a8f9a245e |
| SHA1 | 684ff36b31aedc1e587c8496c02722c6698c1c4e |
| SHA256 | e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced |
| SHA512 | 1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1 |