Analysis
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max time kernel
148s -
max time network
156s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
13-11-2024 20:03
Static task
static1
Behavioral task
behavioral1
Sample
Output.exe
Resource
win7-20240903-en
General
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Target
Output.exe
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Size
3.3MB
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MD5
631c497597c5c12304d528b24ccc31df
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SHA1
9da881cd6797e4e8646de4df60eea73ae45c3133
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SHA256
239584ed2b45abd89565c75968a8ca7d0624b2df851463f80a485e1efc04d9e4
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SHA512
35a6bb13ff373aebb2a6fc080ea0f69e968fbef3441ce7f69604e5f97645ae9e6feb95bad1058fa58f8e652dcc2befd6464d9f62d707d8115c743c57a912957e
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SSDEEP
98304:gm7q1K/hJp6SjJjtPzGhHzKIfx+ceJpTYZ:x7q1Irp9jltPahVfx+ceJtYZ
Malware Config
Extracted
xworm
5.0
testarosa.duckdns.org:7119
Ljk1RFh4f0rbZvhE
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Install_directory
%Temp%
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install_file
Realtec.exe
Extracted
xworm
147.185.221.23:25808
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Install_directory
%LocalAppData%
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install_file
Realtek HD Audio Universal Service.exe
Signatures
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Detect Xworm Payload 4 IoCs
resource yara_rule behavioral2/files/0x0007000000023cb0-13.dat family_xworm behavioral2/memory/3452-24-0x00000000007B0000-0x00000000007C0000-memory.dmp family_xworm behavioral2/files/0x0008000000023cb2-29.dat family_xworm behavioral2/memory/3212-45-0x0000000000DB0000-0x0000000000DCA000-memory.dmp family_xworm -
Xworm family
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Command and Scripting Interpreter: PowerShell 1 TTPs 8 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
pid Process 3924 powershell.exe 4280 powershell.exe 2784 powershell.exe 224 powershell.exe 544 powershell.exe 4100 powershell.exe 3976 powershell.exe 3312 powershell.exe -
Checks computer location settings 2 TTPs 4 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation Output.exe Key value queried \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation SAM X222C#.exe Key value queried \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation Realtek.exe Key value queried \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation Realtek HD Audio Universal Service.exe -
Drops startup file 2 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Realtec.lnk Realtek.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Realtec.lnk Realtek.exe -
Executes dropped EXE 6 IoCs
pid Process 4848 SAM X222C#.exe 3452 Realtek.exe 3212 Realtek HD Audio Universal Service.exe 628 SAM X222C#.exe 4344 Realtec.exe 3952 Realtec.exe -
Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Realtec = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Realtec.exe" Realtek.exe Set value (str) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Realtek HD Audio Universal Service = "C:\\Users\\Admin\\AppData\\Local\\Realtek HD Audio Universal Service.exe" Realtek HD Audio Universal Service.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.
flow ioc 10 ip-api.com -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language SAM X222C#.exe -
NSIS installer 2 IoCs
resource yara_rule behavioral2/files/0x000a000000023ca3-6.dat nsis_installer_1 behavioral2/files/0x000a000000023ca3-6.dat nsis_installer_2 -
Enumerates system info in registry 2 TTPs 3 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS SAM X222C#.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer SAM X222C#.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemVersion SAM X222C#.exe -
Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 1056 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 18 IoCs
pid Process 224 powershell.exe 224 powershell.exe 544 powershell.exe 544 powershell.exe 4100 powershell.exe 3976 powershell.exe 3976 powershell.exe 4100 powershell.exe 3312 powershell.exe 3924 powershell.exe 3924 powershell.exe 3312 powershell.exe 4280 powershell.exe 4280 powershell.exe 2784 powershell.exe 2784 powershell.exe 3452 Realtek.exe 3212 Realtek HD Audio Universal Service.exe -
Suspicious use of AdjustPrivilegeToken 13 IoCs
description pid Process Token: SeDebugPrivilege 3452 Realtek.exe Token: SeDebugPrivilege 3212 Realtek HD Audio Universal Service.exe Token: SeDebugPrivilege 628 SAM X222C#.exe Token: SeDebugPrivilege 224 powershell.exe Token: SeDebugPrivilege 544 powershell.exe Token: SeDebugPrivilege 4100 powershell.exe Token: SeDebugPrivilege 3976 powershell.exe Token: SeDebugPrivilege 3312 powershell.exe Token: SeDebugPrivilege 3924 powershell.exe Token: SeDebugPrivilege 4280 powershell.exe Token: SeDebugPrivilege 2784 powershell.exe Token: SeDebugPrivilege 4344 Realtec.exe Token: SeDebugPrivilege 3952 Realtec.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 3452 Realtek.exe 3212 Realtek HD Audio Universal Service.exe -
Suspicious use of WriteProcessMemory 27 IoCs
description pid Process procid_target PID 1932 wrote to memory of 4848 1932 Output.exe 84 PID 1932 wrote to memory of 4848 1932 Output.exe 84 PID 1932 wrote to memory of 4848 1932 Output.exe 84 PID 1932 wrote to memory of 3452 1932 Output.exe 85 PID 1932 wrote to memory of 3452 1932 Output.exe 85 PID 4848 wrote to memory of 3212 4848 SAM X222C#.exe 87 PID 4848 wrote to memory of 3212 4848 SAM X222C#.exe 87 PID 4848 wrote to memory of 628 4848 SAM X222C#.exe 88 PID 4848 wrote to memory of 628 4848 SAM X222C#.exe 88 PID 3452 wrote to memory of 224 3452 Realtek.exe 91 PID 3452 wrote to memory of 224 3452 Realtek.exe 91 PID 3452 wrote to memory of 544 3452 Realtek.exe 94 PID 3452 wrote to memory of 544 3452 Realtek.exe 94 PID 3212 wrote to memory of 4100 3212 Realtek HD Audio Universal Service.exe 96 PID 3212 wrote to memory of 4100 3212 Realtek HD Audio Universal Service.exe 96 PID 3452 wrote to memory of 3976 3452 Realtek.exe 98 PID 3452 wrote to memory of 3976 3452 Realtek.exe 98 PID 3452 wrote to memory of 3312 3452 Realtek.exe 100 PID 3452 wrote to memory of 3312 3452 Realtek.exe 100 PID 3212 wrote to memory of 3924 3212 Realtek HD Audio Universal Service.exe 101 PID 3212 wrote to memory of 3924 3212 Realtek HD Audio Universal Service.exe 101 PID 3212 wrote to memory of 4280 3212 Realtek HD Audio Universal Service.exe 104 PID 3212 wrote to memory of 4280 3212 Realtek HD Audio Universal Service.exe 104 PID 3212 wrote to memory of 2784 3212 Realtek HD Audio Universal Service.exe 106 PID 3212 wrote to memory of 2784 3212 Realtek HD Audio Universal Service.exe 106 PID 3452 wrote to memory of 1056 3452 Realtek.exe 108 PID 3452 wrote to memory of 1056 3452 Realtek.exe 108 -
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\Output.exe"C:\Users\Admin\AppData\Local\Temp\Output.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1932 -
C:\Users\Admin\AppData\Roaming\SAM X222C#.exe"C:\Users\Admin\AppData\Roaming\SAM X222C#.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4848 -
C:\Users\Admin\AppData\Local\Temp\Realtek HD Audio Universal Service.exe"C:\Users\Admin\AppData\Local\Temp\Realtek HD Audio Universal Service.exe"3⤵
- Checks computer location settings
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3212 -
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\Realtek HD Audio Universal Service.exe'4⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4100
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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 'Realtek HD Audio Universal Service.exe'4⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3924
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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\Realtek HD Audio Universal Service.exe'4⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4280
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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 'Realtek HD Audio Universal Service.exe'4⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2784
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C:\Users\Admin\AppData\Local\Temp\SAM X222C#.exe"C:\Users\Admin\AppData\Local\Temp\SAM X222C#.exe"3⤵
- Executes dropped EXE
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
PID:628
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C:\Users\Admin\AppData\Roaming\Realtek.exe"C:\Users\Admin\AppData\Roaming\Realtek.exe"2⤵
- Checks computer location settings
- Drops startup file
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3452 -
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\Realtek.exe'3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:224
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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 'Realtek.exe'3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:544
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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\Realtec.exe'3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3976
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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 'Realtec.exe'3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3312
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Realtec" /tr "C:\Users\Admin\AppData\Local\Temp\Realtec.exe"3⤵
- Scheduled Task/Job: Scheduled Task
PID:1056
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C:\Users\Admin\AppData\Local\Temp\Realtec.exeC:\Users\Admin\AppData\Local\Temp\Realtec.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4344
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C:\Users\Admin\AppData\Local\Temp\Realtec.exeC:\Users\Admin\AppData\Local\Temp\Realtec.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3952
Network
MITRE ATT&CK Enterprise v15
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
1Privilege Escalation
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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Filesize
654B
MD52ff39f6c7249774be85fd60a8f9a245e
SHA1684ff36b31aedc1e587c8496c02722c6698c1c4e
SHA256e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced
SHA5121d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1
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Filesize
2KB
MD5d85ba6ff808d9e5444a4b369f5bc2730
SHA131aa9d96590fff6981b315e0b391b575e4c0804a
SHA25684739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
SHA5128c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
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Filesize
944B
MD504114c0529b116bf66d764ff6a5a8fe3
SHA10caeff17d1b2190f76c9bf539105f6c40c92bd14
SHA256fd7092b4e273314186bad6ce71aa4cd69450736b6ec6cc746868997ff82a7532
SHA5126a718c330824346606ef24f71cca6be0bfafc626b1d2b060b36e919ab07f3d6a345f56cace8a5a84ffbe2183976eb197842c9fd2f3e3b8c8dd307057d59d6f26
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Filesize
944B
MD5da5c82b0e070047f7377042d08093ff4
SHA189d05987cd60828cca516c5c40c18935c35e8bd3
SHA25677a94ef8c4258445d538a6006ffadb05afdf888f6f044e1e5466b981a07f16c5
SHA5127360311a3c97b73dd3f6d7179cd979e0e20d69f380d38292447e17e369087d9dd5acb66cd0cbdd95ac4bfb16e5a1b86825f835a8d45b14ea9812102cff59704b
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Filesize
944B
MD577d622bb1a5b250869a3238b9bc1402b
SHA1d47f4003c2554b9dfc4c16f22460b331886b191b
SHA256f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb
SHA512d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9
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Filesize
944B
MD5b51dc9e5ec3c97f72b4ca9488bbb4462
SHA15c1e8c0b728cd124edcacefb399bbd5e25b21bd3
SHA256976f9534aa2976c85c2455bdde786a3f55d63aefdd40942eba1223c4c93590db
SHA5120e5aa6cf64c535aefb833e5757b68e1094c87424abe2615a7d7d26b1b31eff358d12e36e75ca57fd690a9919b776600bf4c5c0e5a5df55366ba62238bdf3f280
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Filesize
944B
MD55420c3e24f5090ed2c6388377410d8bc
SHA1036328774b9b4b81ed954615c2045000b3281ae5
SHA25645acb58181e9bcf1529ebe7436a69e29ed5571c6ebe6f33f1062a208f83f6a4f
SHA512b043dfa14daf331e0e77c570131e3d00b5cf0db6375b6ba5cce836cfe7259d1c02d0897d9b438cde515bb0400d2b9107ddf8843554d6e4703d5f59def2ffc3df
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Filesize
79KB
MD5066d90fb1d671648842a3b46622eb7ce
SHA16d0949bd4f494c9f8d80b705a79cfa9038c80e51
SHA2568d2cf02c3005fb4bb7058df1f3a2e24b98077a8c5a8aab5c8184f4aa9ed951d8
SHA512b22c8910e501de5fcb8e6197552396285366c9b43c4c6df4387b95a28830bf13a6ce634aadbf79e71b83879d19132c63414da5c5059edaa33be6bb71cee32745
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Filesize
3.7MB
MD5ad991add5af431b8d808cf9035a5cd46
SHA1d7ac382fa834529219db1b76e4d928ff24f1245b
SHA256a1dfdf32f2a82156bb3007896a9672fa05aba8ce4c668c3f4dce449a1a811a19
SHA512b876e8380ab97dade3f875a7e0cee2dc598ba55143921bdd1f1d9d2d5be55c25d62b12aaef424227e1450f6ddf67a4e04e3f4fc846182abb842c4c821997cbbd
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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Filesize
39KB
MD527794afa5d5c5cf091e80de14bdb218a
SHA1ec07edcd5c705ae72a7d477f0ffeb867ea7eb5db
SHA256502c51b32b810e755b91cfd9a11230f6e0bf3baceda87f527f4ccc555aac9946
SHA512667de7a923e39214db1f40175984832098b4a75869c145888536e21ec1fa6a36777e5c0b6d89669611377b19b04b8c818fdb05a2db1c94ab135bc796167a2491
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Filesize
3.3MB
MD5918951c4657e9cdf39ac1b275bfd2e95
SHA17323e59b2c4d60b6639bfcba11f4c02bcb94e347
SHA256b50d25c24ba5f1f096e883b3a9970d2c080afb37dfe2f55a25a1c7ed3ca36505
SHA512438c7554d8b72db63d598085b2c6fae9bfa1895154ebbaf96a5d2a498459b9a3516611613515f04dbc198edb8b2d7ce2ce63975064f28af63f3efa1e50e3e0d7