Analysis
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max time kernel
129s -
max time network
127s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
25-09-2024 07:17
Static task
static1
Behavioral task
behavioral1
Sample
RustAnticheat.exe
Resource
win7-20240903-en
General
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Target
RustAnticheat.exe
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Size
1.1MB
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MD5
4439e9d53261db0779592ca29f67eb6f
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SHA1
648616ec60a680a0aea8635a2554b50aa2c438f0
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SHA256
d627c54671679d805505543153425de43feb8afe785fdd0ae56dcb5f942f505b
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SHA512
25d63d150a5da4649ccfb6687fd627f5e1c600d31810bd77545b6641dea71379ee45635ad52404b39672f1c60523d1022d4103b977b19e6d191b96ab9d56221f
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SSDEEP
24576:j/AN1n0EZ2ERiljRURFCD5Ku2bWp5EvAMq3YQB1AK2KGsBYDZUA8wB6:TAN1dZ28YjRLKuRpOAopK2KGsB6nB6
Malware Config
Extracted
xworm
web-amend.gl.at.ply.gg:59501
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Install_directory
%Userprofile%
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install_file
USB.exe
Extracted
umbral
https://discord.com/api/webhooks/1288397778665607179/nAXAyuyyZRD7FWYpFsvWKeLD45mIOMzRzGIvC0NZ96M__pln0nZJGz6YCerIfEpPDzEs
Signatures
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Detect Umbral payload 4 IoCs
resource yara_rule behavioral1/memory/2680-18-0x0000000000AB0000-0x0000000000AF0000-memory.dmp family_umbral behavioral1/files/0x000800000001662e-17.dat family_umbral behavioral1/memory/2516-61-0x0000000001280000-0x00000000012C0000-memory.dmp family_umbral behavioral1/memory/2448-74-0x0000000001110000-0x0000000001150000-memory.dmp family_umbral -
Detect Xworm Payload 4 IoCs
resource yara_rule behavioral1/files/0x000800000001658c-11.dat family_xworm behavioral1/memory/2788-19-0x00000000011F0000-0x000000000120A000-memory.dmp family_xworm behavioral1/memory/1660-65-0x0000000000F10000-0x0000000000F2A000-memory.dmp family_xworm behavioral1/memory/2632-68-0x0000000000FD0000-0x0000000000FEA000-memory.dmp 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.
pid Process 1924 powershell.exe 1656 powershell.exe 2312 powershell.exe 1976 powershell.exe -
Drops startup file 2 IoCs
description ioc Process File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\RuntimeBroker.lnk RuntimeBroker.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\RuntimeBroker.lnk RuntimeBroker.exe -
Executes dropped EXE 7 IoCs
pid Process 2800 Loader (1).exe 2788 RuntimeBroker.exe 2680 Umbral.exe 2516 rnuycs.exe 1660 RuntimeBroker 2632 RuntimeBroker 2448 kolott.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\RuntimeBroker = "C:\\Users\\Admin\\RuntimeBroker" RuntimeBroker.exe -
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 4 ip-api.com 11 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 Loader (1).exe -
Delays execution with timeout.exe 1 IoCs
pid Process 2524 timeout.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 2384 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 5 IoCs
pid Process 1924 powershell.exe 1656 powershell.exe 2312 powershell.exe 1976 powershell.exe 2788 RuntimeBroker.exe -
Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeDebugPrivilege 2788 RuntimeBroker.exe Token: SeDebugPrivilege 2680 Umbral.exe Token: SeIncreaseQuotaPrivilege 2588 wmic.exe Token: SeSecurityPrivilege 2588 wmic.exe Token: SeTakeOwnershipPrivilege 2588 wmic.exe Token: SeLoadDriverPrivilege 2588 wmic.exe Token: SeSystemProfilePrivilege 2588 wmic.exe Token: SeSystemtimePrivilege 2588 wmic.exe Token: SeProfSingleProcessPrivilege 2588 wmic.exe Token: SeIncBasePriorityPrivilege 2588 wmic.exe Token: SeCreatePagefilePrivilege 2588 wmic.exe Token: SeBackupPrivilege 2588 wmic.exe Token: SeRestorePrivilege 2588 wmic.exe Token: SeShutdownPrivilege 2588 wmic.exe Token: SeDebugPrivilege 2588 wmic.exe Token: SeSystemEnvironmentPrivilege 2588 wmic.exe Token: SeRemoteShutdownPrivilege 2588 wmic.exe Token: SeUndockPrivilege 2588 wmic.exe Token: SeManageVolumePrivilege 2588 wmic.exe Token: 33 2588 wmic.exe Token: 34 2588 wmic.exe Token: 35 2588 wmic.exe Token: SeIncreaseQuotaPrivilege 2588 wmic.exe Token: SeSecurityPrivilege 2588 wmic.exe Token: SeTakeOwnershipPrivilege 2588 wmic.exe Token: SeLoadDriverPrivilege 2588 wmic.exe Token: SeSystemProfilePrivilege 2588 wmic.exe Token: SeSystemtimePrivilege 2588 wmic.exe Token: SeProfSingleProcessPrivilege 2588 wmic.exe Token: SeIncBasePriorityPrivilege 2588 wmic.exe Token: SeCreatePagefilePrivilege 2588 wmic.exe Token: SeBackupPrivilege 2588 wmic.exe Token: SeRestorePrivilege 2588 wmic.exe Token: SeShutdownPrivilege 2588 wmic.exe Token: SeDebugPrivilege 2588 wmic.exe Token: SeSystemEnvironmentPrivilege 2588 wmic.exe Token: SeRemoteShutdownPrivilege 2588 wmic.exe Token: SeUndockPrivilege 2588 wmic.exe Token: SeManageVolumePrivilege 2588 wmic.exe Token: 33 2588 wmic.exe Token: 34 2588 wmic.exe Token: 35 2588 wmic.exe Token: SeDebugPrivilege 1924 powershell.exe Token: SeDebugPrivilege 1656 powershell.exe Token: SeDebugPrivilege 2312 powershell.exe Token: SeDebugPrivilege 1976 powershell.exe Token: SeDebugPrivilege 2788 RuntimeBroker.exe Token: SeDebugPrivilege 2516 rnuycs.exe Token: SeIncreaseQuotaPrivilege 2400 wmic.exe Token: SeSecurityPrivilege 2400 wmic.exe Token: SeTakeOwnershipPrivilege 2400 wmic.exe Token: SeLoadDriverPrivilege 2400 wmic.exe Token: SeSystemProfilePrivilege 2400 wmic.exe Token: SeSystemtimePrivilege 2400 wmic.exe Token: SeProfSingleProcessPrivilege 2400 wmic.exe Token: SeIncBasePriorityPrivilege 2400 wmic.exe Token: SeCreatePagefilePrivilege 2400 wmic.exe Token: SeBackupPrivilege 2400 wmic.exe Token: SeRestorePrivilege 2400 wmic.exe Token: SeShutdownPrivilege 2400 wmic.exe Token: SeDebugPrivilege 2400 wmic.exe Token: SeSystemEnvironmentPrivilege 2400 wmic.exe Token: SeRemoteShutdownPrivilege 2400 wmic.exe Token: SeUndockPrivilege 2400 wmic.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 2788 RuntimeBroker.exe -
Suspicious use of WriteProcessMemory 55 IoCs
description pid Process procid_target PID 2372 wrote to memory of 2800 2372 RustAnticheat.exe 30 PID 2372 wrote to memory of 2800 2372 RustAnticheat.exe 30 PID 2372 wrote to memory of 2800 2372 RustAnticheat.exe 30 PID 2372 wrote to memory of 2800 2372 RustAnticheat.exe 30 PID 2372 wrote to memory of 2788 2372 RustAnticheat.exe 31 PID 2372 wrote to memory of 2788 2372 RustAnticheat.exe 31 PID 2372 wrote to memory of 2788 2372 RustAnticheat.exe 31 PID 2372 wrote to memory of 2680 2372 RustAnticheat.exe 32 PID 2372 wrote to memory of 2680 2372 RustAnticheat.exe 32 PID 2372 wrote to memory of 2680 2372 RustAnticheat.exe 32 PID 2680 wrote to memory of 2588 2680 Umbral.exe 33 PID 2680 wrote to memory of 2588 2680 Umbral.exe 33 PID 2680 wrote to memory of 2588 2680 Umbral.exe 33 PID 2788 wrote to memory of 1924 2788 RuntimeBroker.exe 37 PID 2788 wrote to memory of 1924 2788 RuntimeBroker.exe 37 PID 2788 wrote to memory of 1924 2788 RuntimeBroker.exe 37 PID 2788 wrote to memory of 1656 2788 RuntimeBroker.exe 39 PID 2788 wrote to memory of 1656 2788 RuntimeBroker.exe 39 PID 2788 wrote to memory of 1656 2788 RuntimeBroker.exe 39 PID 2788 wrote to memory of 2312 2788 RuntimeBroker.exe 41 PID 2788 wrote to memory of 2312 2788 RuntimeBroker.exe 41 PID 2788 wrote to memory of 2312 2788 RuntimeBroker.exe 41 PID 2788 wrote to memory of 1976 2788 RuntimeBroker.exe 43 PID 2788 wrote to memory of 1976 2788 RuntimeBroker.exe 43 PID 2788 wrote to memory of 1976 2788 RuntimeBroker.exe 43 PID 2788 wrote to memory of 2384 2788 RuntimeBroker.exe 45 PID 2788 wrote to memory of 2384 2788 RuntimeBroker.exe 45 PID 2788 wrote to memory of 2384 2788 RuntimeBroker.exe 45 PID 2788 wrote to memory of 2516 2788 RuntimeBroker.exe 47 PID 2788 wrote to memory of 2516 2788 RuntimeBroker.exe 47 PID 2788 wrote to memory of 2516 2788 RuntimeBroker.exe 47 PID 2516 wrote to memory of 2400 2516 rnuycs.exe 48 PID 2516 wrote to memory of 2400 2516 rnuycs.exe 48 PID 2516 wrote to memory of 2400 2516 rnuycs.exe 48 PID 2136 wrote to memory of 1660 2136 taskeng.exe 51 PID 2136 wrote to memory of 1660 2136 taskeng.exe 51 PID 2136 wrote to memory of 1660 2136 taskeng.exe 51 PID 2136 wrote to memory of 2632 2136 taskeng.exe 52 PID 2136 wrote to memory of 2632 2136 taskeng.exe 52 PID 2136 wrote to memory of 2632 2136 taskeng.exe 52 PID 2788 wrote to memory of 2448 2788 RuntimeBroker.exe 53 PID 2788 wrote to memory of 2448 2788 RuntimeBroker.exe 53 PID 2788 wrote to memory of 2448 2788 RuntimeBroker.exe 53 PID 2448 wrote to memory of 2692 2448 kolott.exe 54 PID 2448 wrote to memory of 2692 2448 kolott.exe 54 PID 2448 wrote to memory of 2692 2448 kolott.exe 54 PID 2788 wrote to memory of 1512 2788 RuntimeBroker.exe 57 PID 2788 wrote to memory of 1512 2788 RuntimeBroker.exe 57 PID 2788 wrote to memory of 1512 2788 RuntimeBroker.exe 57 PID 2788 wrote to memory of 2816 2788 RuntimeBroker.exe 59 PID 2788 wrote to memory of 2816 2788 RuntimeBroker.exe 59 PID 2788 wrote to memory of 2816 2788 RuntimeBroker.exe 59 PID 2816 wrote to memory of 2524 2816 cmd.exe 61 PID 2816 wrote to memory of 2524 2816 cmd.exe 61 PID 2816 wrote to memory of 2524 2816 cmd.exe 61 -
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\RustAnticheat.exe"C:\Users\Admin\AppData\Local\Temp\RustAnticheat.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:2372 -
C:\Users\Admin\Loader (1).exe"C:\Users\Admin\Loader (1).exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:2800
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C:\Users\Admin\RuntimeBroker.exe"C:\Users\Admin\RuntimeBroker.exe"2⤵
- 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:2788 -
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\RuntimeBroker.exe'3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1924
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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 'RuntimeBroker.exe'3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1656
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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\RuntimeBroker'3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2312
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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 'RuntimeBroker'3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1976
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "RuntimeBroker" /tr "C:\Users\Admin\RuntimeBroker"3⤵
- Scheduled Task/Job: Scheduled Task
PID:2384
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C:\Users\Admin\AppData\Local\Temp\rnuycs.exe"C:\Users\Admin\AppData\Local\Temp\rnuycs.exe"3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2516 -
C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2400
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C:\Users\Admin\AppData\Local\Temp\kolott.exe"C:\Users\Admin\AppData\Local\Temp\kolott.exe"3⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:2448 -
C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid4⤵PID:2692
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /delete /f /tn "RuntimeBroker"3⤵PID:1512
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C:\Windows\system32\cmd.execmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp45D7.tmp.bat""3⤵
- Suspicious use of WriteProcessMemory
PID:2816 -
C:\Windows\system32\timeout.exetimeout 34⤵
- Delays execution with timeout.exe
PID:2524
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C:\Users\Admin\Umbral.exe"C:\Users\Admin\Umbral.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2680 -
C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid3⤵
- Suspicious use of AdjustPrivilegeToken
PID:2588
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C:\Windows\system32\taskeng.exetaskeng.exe {0EE91EAA-5287-4C0B-9261-B53BE97BE369} S-1-5-21-1846800975-3917212583-2893086201-1000:ZQABOPWE\Admin:Interactive:[1]1⤵
- Suspicious use of WriteProcessMemory
PID:2136 -
C:\Users\Admin\RuntimeBrokerC:\Users\Admin\RuntimeBroker2⤵
- Executes dropped EXE
PID:1660
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C:\Users\Admin\RuntimeBrokerC:\Users\Admin\RuntimeBroker2⤵
- Executes dropped EXE
PID:2632
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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
146B
MD515abe39633a41120a26e9b5dace641b3
SHA1497b036d56edf41acd7cad4d95794824e9c6e9cc
SHA256e9ca1069724c4676352035c68835fdfdc2b568dacfdc031e3daf3d8f83863d2d
SHA512cf1e2a73d601c9a7a443ac9efd8a8293a326fe3d166dccff238138a99d592e8d73a6db51701fe45514c3c831cc2e75311fd7f8f10af41c1a6530391883bea660
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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
Filesize7KB
MD5f1b87b26d9ed2fb9bcf6108c5de0db70
SHA129d93166d8ae7fd5b9007f83f4f5de521d88698f
SHA2566181a4eb42685be47ffac8229c8f8c7700f37c92fcccd6f7f0ae6e56a3b50795
SHA512aa5b723283e7bb7be8d8ee093fb19f6c252fae7ab9e2fafdac2613204c58cf8b4551a000359fe6d0cbbac7b01e7a4315c2bd0833e34bb96f3313a1ba144b03d2
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Filesize
827KB
MD5eefb801774c5ccb44153268a9357f5f1
SHA1b1906b22e14edd142c52808ab3e5ba9346b85de5
SHA256677aeb1981c58cba41a5d53ccbbf5b471e62dc49dc326570767da940560d840d
SHA5121cf162fe6184d68dca514059d2de1123e80d0faac401765a54224aa5a987c9454bc92263fbec566835aa7b402f1f63ba59bb425ccc139e0a7391e66991f270b7
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Filesize
77KB
MD57c4f97717ce74232ede2fc0b48956636
SHA1d7dd219805af9fb9251214d598badc3d4d1b7bf8
SHA256f84e5ceb6d0c53993bf5139e7e58dcc06c8cc7d6bc1e5e97171445f6fe01109d
SHA512ad1963a20fc98927239eb1aaa6f881913ac5884c28c00b59637e4fd51dbafd376150e1e6a5cf8634f6a5610bd2286dc185b3f14362c06a613dfe40db528cea26
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Filesize
229KB
MD5756054196fc3e123b21c5e1e18199784
SHA174104b22cc47797253dc3a9920a1b85b2b6eb110
SHA25680f484da3af4996f5e90fe93a32092b81361f9f84690492cb0532d6a0990e436
SHA512458aa58813a4032d165b01b340e167b64849926fa5c64ebc08884c6045556b24da1091114a0876a541bfcee7243cc79c21d88a360f5f4ffd7d4555e7ae364c3b