Analysis
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max time kernel
139s -
max time network
142s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
31-05-2024 01:16
Behavioral task
behavioral1
Sample
20235ee05aef546e34ddf783007e6779.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
20235ee05aef546e34ddf783007e6779.exe
Resource
win10v2004-20240508-en
General
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Target
20235ee05aef546e34ddf783007e6779.exe
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Size
70KB
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MD5
20235ee05aef546e34ddf783007e6779
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SHA1
999bda8ca538ef81fd3762cdfdf941253c4890d7
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SHA256
f4140df465adf4050ecea61cb9659b757c97f65b8c3cca7afac5a5e89d203c36
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SHA512
aa8d92869a44d638f17737d7a477aa6cfcef2dd43cf460b548110417eb6d62258d5285abf3a66fbfe0a44af8414db1cb3335bc04cd0b79d67b86061284fb7f6f
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SSDEEP
1536:VmHeyoqqmb8/7kGkbaXtmkcL8U69q4WOZ0B86a:VmHbQTkbaX9FqxOZ0B86a
Malware Config
Extracted
xworm
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Install_directory
%AppData%
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install_file
Runtime Broker.exe
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pastebin_url
https://pastebin.com/raw/kYPYyCCf
Signatures
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Detect Xworm Payload 2 IoCs
Processes:
resource yara_rule behavioral2/memory/4140-1-0x00000000000D0000-0x00000000000E8000-memory.dmp family_xworm C:\Users\Admin\AppData\Roaming\Runtime Broker.exe family_xworm -
Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
Processes:
powershell.exepowershell.exepowershell.exepowershell.exepid process 1852 powershell.exe 5108 powershell.exe 2432 powershell.exe 4152 powershell.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
20235ee05aef546e34ddf783007e6779.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation 20235ee05aef546e34ddf783007e6779.exe -
Drops startup file 2 IoCs
Processes:
20235ee05aef546e34ddf783007e6779.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Runtime Broker.lnk 20235ee05aef546e34ddf783007e6779.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Runtime Broker.lnk 20235ee05aef546e34ddf783007e6779.exe -
Executes dropped EXE 3 IoCs
Processes:
Runtime Broker.exeRuntime Broker.exeRuntime Broker.exepid process 2660 Runtime Broker.exe 3816 Runtime Broker.exe 2884 Runtime Broker.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
20235ee05aef546e34ddf783007e6779.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Runtime Broker = "C:\\Users\\Admin\\AppData\\Roaming\\Runtime Broker.exe" 20235ee05aef546e34ddf783007e6779.exe -
Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 8 IoCs
Processes:
powershell.exepowershell.exepowershell.exepowershell.exepid process 1852 powershell.exe 1852 powershell.exe 5108 powershell.exe 5108 powershell.exe 2432 powershell.exe 2432 powershell.exe 4152 powershell.exe 4152 powershell.exe -
Suspicious use of AdjustPrivilegeToken 9 IoCs
Processes:
20235ee05aef546e34ddf783007e6779.exepowershell.exepowershell.exepowershell.exepowershell.exeRuntime Broker.exeRuntime Broker.exeRuntime Broker.exedescription pid process Token: SeDebugPrivilege 4140 20235ee05aef546e34ddf783007e6779.exe Token: SeDebugPrivilege 1852 powershell.exe Token: SeDebugPrivilege 5108 powershell.exe Token: SeDebugPrivilege 2432 powershell.exe Token: SeDebugPrivilege 4152 powershell.exe Token: SeDebugPrivilege 4140 20235ee05aef546e34ddf783007e6779.exe Token: SeDebugPrivilege 2660 Runtime Broker.exe Token: SeDebugPrivilege 3816 Runtime Broker.exe Token: SeDebugPrivilege 2884 Runtime Broker.exe -
Suspicious use of WriteProcessMemory 10 IoCs
Processes:
20235ee05aef546e34ddf783007e6779.exedescription pid process target process PID 4140 wrote to memory of 1852 4140 20235ee05aef546e34ddf783007e6779.exe powershell.exe PID 4140 wrote to memory of 1852 4140 20235ee05aef546e34ddf783007e6779.exe powershell.exe PID 4140 wrote to memory of 5108 4140 20235ee05aef546e34ddf783007e6779.exe powershell.exe PID 4140 wrote to memory of 5108 4140 20235ee05aef546e34ddf783007e6779.exe powershell.exe PID 4140 wrote to memory of 2432 4140 20235ee05aef546e34ddf783007e6779.exe powershell.exe PID 4140 wrote to memory of 2432 4140 20235ee05aef546e34ddf783007e6779.exe powershell.exe PID 4140 wrote to memory of 4152 4140 20235ee05aef546e34ddf783007e6779.exe powershell.exe PID 4140 wrote to memory of 4152 4140 20235ee05aef546e34ddf783007e6779.exe powershell.exe PID 4140 wrote to memory of 4856 4140 20235ee05aef546e34ddf783007e6779.exe schtasks.exe PID 4140 wrote to memory of 4856 4140 20235ee05aef546e34ddf783007e6779.exe schtasks.exe -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\20235ee05aef546e34ddf783007e6779.exe"C:\Users\Admin\AppData\Local\Temp\20235ee05aef546e34ddf783007e6779.exe"1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4140 -
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\20235ee05aef546e34ddf783007e6779.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1852
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '20235ee05aef546e34ddf783007e6779.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:5108
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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\Runtime Broker.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2432
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Runtime Broker.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4152
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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\AppData\Roaming\Runtime Broker.exe"2⤵
- Creates scheduled task(s)
PID:4856
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C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2660
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C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3816
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C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2884
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
654B
MD52ff39f6c7249774be85fd60a8f9a245e
SHA1684ff36b31aedc1e587c8496c02722c6698c1c4e
SHA256e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced
SHA5121d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1
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Filesize
2KB
MD5d85ba6ff808d9e5444a4b369f5bc2730
SHA131aa9d96590fff6981b315e0b391b575e4c0804a
SHA25684739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
SHA5128c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
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Filesize
944B
MD52e907f77659a6601fcc408274894da2e
SHA19f5b72abef1cd7145bf37547cdb1b9254b4efe9d
SHA256385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233
SHA51234fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721
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Filesize
944B
MD5ba169f4dcbbf147fe78ef0061a95e83b
SHA192a571a6eef49fff666e0f62a3545bcd1cdcda67
SHA2565ef1421e19fde4bc03cd825dd7d6c0e7863f85fd8f0aa4a4d4f8d555dc7606d1
SHA5128d2e5e552210dcda684682538bc964fdd8a8ff5b24cc2cc8af813729f0202191f98eb42d38d2355df17ae620fe401aad6ceaedaed3b112fdacd32485a3a0c07c
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Filesize
944B
MD534f595487e6bfd1d11c7de88ee50356a
SHA14caad088c15766cc0fa1f42009260e9a02f953bb
SHA2560f9a4b52e01cb051052228a55d0515911b7ef5a8db3cf925528c746df511424d
SHA51210976c5deaf9fac449e703e852c3b08d099f430de2d7c7b8e2525c35d63e28b890e5aab63feff9b20bca0aaf9f35a3ba411aee3fbeee9ea59f90ed25bd617a0b
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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Filesize
70KB
MD520235ee05aef546e34ddf783007e6779
SHA1999bda8ca538ef81fd3762cdfdf941253c4890d7
SHA256f4140df465adf4050ecea61cb9659b757c97f65b8c3cca7afac5a5e89d203c36
SHA512aa8d92869a44d638f17737d7a477aa6cfcef2dd43cf460b548110417eb6d62258d5285abf3a66fbfe0a44af8414db1cb3335bc04cd0b79d67b86061284fb7f6f