Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240611-en -
resource tags
arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system -
submitted
30-06-2024 01:22
Behavioral task
behavioral1
Sample
ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe
Resource
win10v2004-20240611-en
General
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Target
ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe
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Size
251KB
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MD5
1fee5ce12cd61659dd46575a2e378361
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SHA1
91722b8dcf5318c379e5ae96692928b22b055969
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SHA256
ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce
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SHA512
9e46fe97922c9c24c9ceb31201bb703ba47b73248c413633c097ec8b44ee026fb4ce2569a3f7578f753b3d8cd7f6ed5aa425bb308b49b7e0062a685468d38638
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SSDEEP
3072:vfWp/2bS2/YnEtOryoW8SKfbzxcwg7es6/Vsb8VKTu549oJMfF/H9N3Ky9NzLnK:dbn/YnWUhcX7elbKTua9bfF/H9d9n
Malware Config
Extracted
xworm
156.225.129.202:7005
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Install_directory
%AppData%
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install_file
crss.exe
Signatures
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Detect Xworm Payload 2 IoCs
Processes:
resource yara_rule behavioral2/memory/4476-1-0x0000000000E40000-0x0000000000E84000-memory.dmp family_xworm C:\Users\Admin\AppData\Roaming\crss.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 4048 powershell.exe 4216 powershell.exe 752 powershell.exe 4360 powershell.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-4204450073-1267028356-951339405-1000\Control Panel\International\Geo\Nation ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe -
Drops startup file 2 IoCs
Processes:
ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exedescription ioc process File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\crss.lnk ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\crss.lnk ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe -
Executes dropped EXE 2 IoCs
Processes:
crss.execrss.exepid process 4540 crss.exe 3432 crss.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-4204450073-1267028356-951339405-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\crss = "C:\\Users\\Admin\\AppData\\Roaming\\crss.exe" ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe -
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 18 ip-api.com -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Scheduled Task/Job: Scheduled Task 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 9 IoCs
Processes:
powershell.exepowershell.exepowershell.exepowershell.exeded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exepid process 4048 powershell.exe 4048 powershell.exe 4216 powershell.exe 4216 powershell.exe 752 powershell.exe 752 powershell.exe 4360 powershell.exe 4360 powershell.exe 4476 ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe -
Suspicious use of AdjustPrivilegeToken 8 IoCs
Processes:
ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exepowershell.exepowershell.exepowershell.exepowershell.execrss.execrss.exedescription pid process Token: SeDebugPrivilege 4476 ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe Token: SeDebugPrivilege 4048 powershell.exe Token: SeDebugPrivilege 4216 powershell.exe Token: SeDebugPrivilege 752 powershell.exe Token: SeDebugPrivilege 4360 powershell.exe Token: SeDebugPrivilege 4476 ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe Token: SeDebugPrivilege 4540 crss.exe Token: SeDebugPrivilege 3432 crss.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exepid process 4476 ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe -
Suspicious use of WriteProcessMemory 10 IoCs
Processes:
ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exedescription pid process target process PID 4476 wrote to memory of 4048 4476 ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe powershell.exe PID 4476 wrote to memory of 4048 4476 ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe powershell.exe PID 4476 wrote to memory of 4216 4476 ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe powershell.exe PID 4476 wrote to memory of 4216 4476 ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe powershell.exe PID 4476 wrote to memory of 752 4476 ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe powershell.exe PID 4476 wrote to memory of 752 4476 ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe powershell.exe PID 4476 wrote to memory of 4360 4476 ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe powershell.exe PID 4476 wrote to memory of 4360 4476 ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe powershell.exe PID 4476 wrote to memory of 4340 4476 ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe schtasks.exe PID 4476 wrote to memory of 4340 4476 ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.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\ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe"C:\Users\Admin\AppData\Local\Temp\ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe"1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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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\Local\Temp\ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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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 'ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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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\crss.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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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 'crss.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "crss" /tr "C:\Users\Admin\AppData\Roaming\crss.exe"2⤵
- Scheduled Task/Job: Scheduled Task
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C:\Users\Admin\AppData\Roaming\crss.exeC:\Users\Admin\AppData\Roaming\crss.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Roaming\crss.exeC:\Users\Admin\AppData\Roaming\crss.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v13
Execution
Command and Scripting Interpreter
1PowerShell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\crss.exe.logFilesize
654B
MD52ff39f6c7249774be85fd60a8f9a245e
SHA1684ff36b31aedc1e587c8496c02722c6698c1c4e
SHA256e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced
SHA5121d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1
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C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.logFilesize
2KB
MD5d85ba6ff808d9e5444a4b369f5bc2730
SHA131aa9d96590fff6981b315e0b391b575e4c0804a
SHA25684739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
SHA5128c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
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C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractiveFilesize
944B
MD56d3e9c29fe44e90aae6ed30ccf799ca8
SHA1c7974ef72264bbdf13a2793ccf1aed11bc565dce
SHA2562360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d
SHA51260c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a
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C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractiveFilesize
944B
MD59f13ed5cb98e1dde77e3c87ebd510c7a
SHA1b5229ea2f730a5f0bfd4f5fc1171ef968ec77fa1
SHA25621528ab3302d530fc41d8ae713f6b2eaa2f88b24989c9679f4ddb8794b7836ee
SHA512ae5f67b5d0f069bc41691719ba01879d17aa435796f3a7e4f7ee054f34ee5eca33a839f4b472854d2f07b374f38ed7b3ed255c5fecb4f4108a580ead727f3c98
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C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractiveFilesize
944B
MD56010e022cfcf213cca762933d10506c3
SHA1782ac7d9e6ab9ec99eb1f3f893d7619de3bcb398
SHA256d223a6db31813db577d47604c9120f1d3d399b6a527ff5d886fc2f0def19b3bb
SHA512b4498fc6abd26786c222ca7c31cd1506fb38fe171ee8184a79037e07cfae387aa0b9eaab3df81d04a8250de600538dcbaa9fbc509ba837ac6bf41dcb71351ccd
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C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tygkdb5q.kii.ps1Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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C:\Users\Admin\AppData\Roaming\crss.exeFilesize
251KB
MD51fee5ce12cd61659dd46575a2e378361
SHA191722b8dcf5318c379e5ae96692928b22b055969
SHA256ded5515158d7b1ed9520713645bc63d7bb872f0a212c77ebb1afce0d16fad0ce
SHA5129e46fe97922c9c24c9ceb31201bb703ba47b73248c413633c097ec8b44ee026fb4ce2569a3f7578f753b3d8cd7f6ed5aa425bb308b49b7e0062a685468d38638
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memory/4048-14-0x00007FFEABBF0000-0x00007FFEAC6B1000-memory.dmpFilesize
10.8MB
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memory/4048-15-0x00007FFEABBF0000-0x00007FFEAC6B1000-memory.dmpFilesize
10.8MB
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memory/4048-18-0x00007FFEABBF0000-0x00007FFEAC6B1000-memory.dmpFilesize
10.8MB
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memory/4048-13-0x00007FFEABBF0000-0x00007FFEAC6B1000-memory.dmpFilesize
10.8MB
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memory/4048-8-0x0000023DB2590000-0x0000023DB25B2000-memory.dmpFilesize
136KB
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memory/4476-0-0x00007FFEABBF3000-0x00007FFEABBF5000-memory.dmpFilesize
8KB
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memory/4476-2-0x00007FFEABBF0000-0x00007FFEAC6B1000-memory.dmpFilesize
10.8MB
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memory/4476-57-0x00007FFEABBF3000-0x00007FFEABBF5000-memory.dmpFilesize
8KB
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memory/4476-58-0x00007FFEABBF0000-0x00007FFEAC6B1000-memory.dmpFilesize
10.8MB
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memory/4476-1-0x0000000000E40000-0x0000000000E84000-memory.dmpFilesize
272KB