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Analysis
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max time kernel
142s -
max time network
146s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
18/11/2024, 18:35
Static task
static1
Behavioral task
behavioral1
Sample
SAM X222C#.exe
Resource
win7-20240903-en
General
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Target
SAM X222C#.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/0x000a000000023b37-13.dat family_xworm behavioral2/memory/4748-22-0x00000000001F0000-0x0000000000200000-memory.dmp family_xworm behavioral2/files/0x000b000000023b39-27.dat family_xworm behavioral2/memory/2604-43-0x0000000000190000-0x00000000001AA000-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 3260 powershell.exe 700 powershell.exe 1176 powershell.exe 3500 powershell.exe 1400 powershell.exe 1740 powershell.exe 3056 powershell.exe 2468 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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation SAM X222C#.exe Key value queried \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation SAM X222C#.exe Key value queried \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation Realtek.exe Key value queried \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\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 7 IoCs
pid Process 3812 SAM X222C#.exe 4748 Realtek.exe 2604 Realtek HD Audio Universal Service.exe 1652 SAM X222C#.exe 1000 Realtec.exe 4716 Realtec.exe 2168 Realtec.exe -
Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Realtec = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Realtec.exe" Realtek.exe Set value (str) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\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 16 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/0x000c000000023b2c-6.dat nsis_installer_1 behavioral2/files/0x000c000000023b2c-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 1404 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 18 IoCs
pid Process 700 powershell.exe 700 powershell.exe 1176 powershell.exe 1176 powershell.exe 3500 powershell.exe 3500 powershell.exe 1400 powershell.exe 1400 powershell.exe 1400 powershell.exe 1740 powershell.exe 1740 powershell.exe 1740 powershell.exe 2468 powershell.exe 2468 powershell.exe 3260 powershell.exe 3260 powershell.exe 4748 Realtek.exe 2604 Realtek HD Audio Universal Service.exe -
Suspicious use of AdjustPrivilegeToken 13 IoCs
description pid Process Token: SeDebugPrivilege 4748 Realtek.exe Token: SeDebugPrivilege 2604 Realtek HD Audio Universal Service.exe Token: SeDebugPrivilege 1652 SAM X222C#.exe Token: SeDebugPrivilege 700 powershell.exe Token: SeDebugPrivilege 1176 powershell.exe Token: SeDebugPrivilege 3500 powershell.exe Token: SeDebugPrivilege 1400 powershell.exe Token: SeDebugPrivilege 1740 powershell.exe Token: SeDebugPrivilege 2468 powershell.exe Token: SeDebugPrivilege 3260 powershell.exe Token: SeDebugPrivilege 1000 Realtec.exe Token: SeDebugPrivilege 4716 Realtec.exe Token: SeDebugPrivilege 2168 Realtec.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 4748 Realtek.exe 2604 Realtek HD Audio Universal Service.exe -
Suspicious use of WriteProcessMemory 27 IoCs
description pid Process procid_target PID 1548 wrote to memory of 3812 1548 SAM X222C#.exe 82 PID 1548 wrote to memory of 3812 1548 SAM X222C#.exe 82 PID 1548 wrote to memory of 3812 1548 SAM X222C#.exe 82 PID 1548 wrote to memory of 4748 1548 SAM X222C#.exe 83 PID 1548 wrote to memory of 4748 1548 SAM X222C#.exe 83 PID 3812 wrote to memory of 2604 3812 SAM X222C#.exe 86 PID 3812 wrote to memory of 2604 3812 SAM X222C#.exe 86 PID 3812 wrote to memory of 1652 3812 SAM X222C#.exe 87 PID 3812 wrote to memory of 1652 3812 SAM X222C#.exe 87 PID 4748 wrote to memory of 700 4748 Realtek.exe 92 PID 4748 wrote to memory of 700 4748 Realtek.exe 92 PID 4748 wrote to memory of 1176 4748 Realtek.exe 94 PID 4748 wrote to memory of 1176 4748 Realtek.exe 94 PID 4748 wrote to memory of 3500 4748 Realtek.exe 98 PID 4748 wrote to memory of 3500 4748 Realtek.exe 98 PID 2604 wrote to memory of 1400 2604 Realtek HD Audio Universal Service.exe 100 PID 2604 wrote to memory of 1400 2604 Realtek HD Audio Universal Service.exe 100 PID 4748 wrote to memory of 1740 4748 Realtek.exe 102 PID 4748 wrote to memory of 1740 4748 Realtek.exe 102 PID 2604 wrote to memory of 3056 2604 Realtek HD Audio Universal Service.exe 104 PID 2604 wrote to memory of 3056 2604 Realtek HD Audio Universal Service.exe 104 PID 2604 wrote to memory of 2468 2604 Realtek HD Audio Universal Service.exe 106 PID 2604 wrote to memory of 2468 2604 Realtek HD Audio Universal Service.exe 106 PID 2604 wrote to memory of 3260 2604 Realtek HD Audio Universal Service.exe 108 PID 2604 wrote to memory of 3260 2604 Realtek HD Audio Universal Service.exe 108 PID 4748 wrote to memory of 1404 4748 Realtek.exe 111 PID 4748 wrote to memory of 1404 4748 Realtek.exe 111 -
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\SAM X222C#.exe"C:\Users\Admin\AppData\Local\Temp\SAM X222C#.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1548 -
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:3812 -
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:2604 -
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:1400
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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
PID:3056
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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:2468
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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:3260
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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:1652
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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:4748 -
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:700
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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:1176
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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:3500
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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:1740
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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:1404
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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:1000
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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:4716
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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:2168
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
MD521a9418825c5bd0d3d4e27e07a7fdb46
SHA12b1742947788771ed20ee55ffc7e222ec4568de8
SHA256bb073567f10e4d90910b9a7f6c2ecce180e10630491431c6e2974f9699d65137
SHA512cda334632ea4ba343d6e3c15683bbdac0adfe1d536d525965bde33813e1a1e6cb6662e62c8aeba505a7077c5fd9698b2ffc8acaf2f52f749e4ce0efd6f8aaac4
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Filesize
944B
MD5ce4540390cc4841c8973eb5a3e9f4f7d
SHA12293f30a6f4c9538bc5b06606c10a50ab4ecef8e
SHA256e834e1da338b9644d538cefd70176768816da2556939c1255d386931bd085105
SHA5122a3e466cb5a81d2b65256053b768a98321eb3e65ff46353eefc9864f14a391748116f050e7482ddd73a51575bf0a6fc5c673023dade62dbd8b174442bae1cc6b
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Filesize
944B
MD5e60eb305a7b2d9907488068b7065abd3
SHA11643dd7f915ac50c75bc01c53d68c5dafb9ce28d
SHA256ad07460e061642c0dd4e7dfa7b821aacce873e290389e72f708e9f3504f9d135
SHA51295c45afec6fa4e0b2a21edd10a6b2dc30568810c67bc9bc34d98ab111c48261f377a370583adb27e08616b0108026c119493b1b093b52ce931117e646b46cb7b
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Filesize
944B
MD577d622bb1a5b250869a3238b9bc1402b
SHA1d47f4003c2554b9dfc4c16f22460b331886b191b
SHA256f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb
SHA512d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9
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Filesize
944B
MD5b4b6d4cc52b5a3a71149b1f33d94d5de
SHA197d3dbdd24919eab70e3b14c68797cefc07e90dd
SHA256da8c02ce00d5b1e6d4c3667465c7bbc14d7cd5227eb634f3d9690afd488267fe
SHA512fc894f03709b83df7d2fca2779e1e60549078b67bcdbff0b61c8e5a802982210ae971309c1f92577573299288963ab5c95c6b38cbaedf53dc6062812c57a97af
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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