Analysis
- max time kernel
149s - max time network
161s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows - submitted
22/05/2026, 13:08
Behavioral task
behavioral1
Sample
tmpro0m4so1.exe
Resource
win10ltsc2021-20260513-en
11 signatures
150 seconds
Behavioral task
behavioral2
Sample
tmpro0m4so1.exe
Resource
win10v2004-20260513-en
12 signatures
150 seconds
General
- Target tmpro0m4so1.exe
- Size 45KB
- Sample260522-qc85dset6x
- SHA256 aa3730f9c813244b45c6a61c15751cea81398f0a150bebfbf2a1bdf48e4c82d6
- MD5 cac92ad821db940b0e742fe2135fe600
- SHA1 9c1615105a97a215a9014303f196103d093f3e55
- SHA512 86170bb61518285b047a0d5c2b1edc8dee8fc043549a89568863f5f627b1e5a1b87070796c532722de70e7b9ded170b185fbb2735b6b96476d0d89fac77125de
- SSDEEP 768:ihP0kDE9N5dCA8J7VHXdrIniQaBTT+QQ+r1n4K8+C9TtIuCjaqUODvJVQ2H:OsWE9N5dFu53dsniQaB/xZ14n7zIF+qT
- TLSH T14223F1DEFA177C6AF4B38E3D63030B354612AA3175AEE757186192DD2C31364CE41B2A
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Executes dropped EXE 1 IoCs
pid Process 3700 bin.exe - Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2937465464-4167303362-2236413517-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\8E99AA91 = "C:\\Users\\Admin\\AppData\\Roaming\\8E99AA91\\bin.exe" winver.exe -
resource yara_rule behavioral2/memory/2088-0-0x0000000000400000-0x000000000041D000-memory.dmp upx behavioral2/memory/3700-20-0x0000000000400000-0x000000000041D000-memory.dmp upx behavioral2/files/0x0007000000024543-18.dat upx - Program crash 1 IoCs
pid pid_target Process procid_target 1788 3988 WerFault.exe 88 - System Location Discovery: System Language Discovery 1 TTPs 3 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 tmpro0m4so1.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language winver.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language bin.exe - Modifies registry class 2 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance\ Explorer.EXE Key created \REGISTRY\USER\S-1-5-21-2937465464-4167303362-2236413517-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance\ Explorer.EXE - Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 3988 winver.exe 3988 winver.exe - Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 3244 Explorer.EXE - Suspicious use of AdjustPrivilegeToken 26 IoCs
description pid Process Token: SeShutdownPrivilege 3244 Explorer.EXE Token: SeCreatePagefilePrivilege 3244 Explorer.EXE Token: SeShutdownPrivilege 3244 Explorer.EXE Token: SeCreatePagefilePrivilege 3244 Explorer.EXE Token: SeShutdownPrivilege 3244 Explorer.EXE Token: SeCreatePagefilePrivilege 3244 Explorer.EXE Token: SeShutdownPrivilege 3244 Explorer.EXE Token: SeCreatePagefilePrivilege 3244 Explorer.EXE Token: SeShutdownPrivilege 3244 Explorer.EXE Token: SeCreatePagefilePrivilege 3244 Explorer.EXE Token: SeShutdownPrivilege 3244 Explorer.EXE Token: SeCreatePagefilePrivilege 3244 Explorer.EXE Token: SeShutdownPrivilege 3244 Explorer.EXE Token: SeCreatePagefilePrivilege 3244 Explorer.EXE Token: SeShutdownPrivilege 3244 Explorer.EXE Token: SeCreatePagefilePrivilege 3244 Explorer.EXE Token: SeShutdownPrivilege 3244 Explorer.EXE Token: SeCreatePagefilePrivilege 3244 Explorer.EXE Token: SeShutdownPrivilege 3244 Explorer.EXE Token: SeCreatePagefilePrivilege 3244 Explorer.EXE Token: SeShutdownPrivilege 3244 Explorer.EXE Token: SeCreatePagefilePrivilege 3244 Explorer.EXE Token: SeShutdownPrivilege 3244 Explorer.EXE Token: SeCreatePagefilePrivilege 3244 Explorer.EXE Token: SeShutdownPrivilege 3244 Explorer.EXE Token: SeCreatePagefilePrivilege 3244 Explorer.EXE - Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 3988 winver.exe - Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 2088 wrote to memory of 3988 2088 tmpro0m4so1.exe 88 PID 3988 wrote to memory of 3244 3988 winver.exe 56 PID 3244 wrote to memory of 4576 3244 Explorer.EXE PID 3244 wrote to memory of 4576 3244 Explorer.EXE PID 4576 wrote to memory of 3700 4576 Process not Found 92 PID 4576 wrote to memory of 3700 4576 Process not Found 92 PID 3988 wrote to memory of 3068 3988 winver.exe 51
Processes
-
C:\Windows\system32\sihost.exesihost.exe1⤵PID:3068
-
C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3244 -
C:\Users\Admin\AppData\Local\Temp\tmpro0m4so1.exe"C:\Users\Admin\AppData\Local\Temp\tmpro0m4so1.exe"2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2088 -
C:\Windows\SysWOW64\winver.exewinver3⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:3988 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3988 -s 3524⤵
- Program crash
PID:1788
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C:\Users\Admin\AppData\Roaming\8E99AA91\bin.exeC:\Users\Admin\AppData\Roaming\8E99AA91\bin.exe1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:3700
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3988 -ip 39881⤵PID:3496
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Roaming\8E99AA91\bin.exe
- Size 45KB
- SHA256 6f93b2aba9b086f152fdcf571611c24dfc48258c87ec7fa7281bdc6b8e730b83
- MD5 0ca36e9c864bcb46e586f6d528fc6048
- SHA1 9e8d48b8ab157b1be1a50b70204c2d69f6a6c86c
- SHA512 28514bd00066a3db4db7969740c1e4078147b219917dfd3f44d4a65358494b0f8b9335ed20f8c5c76509cc8d8aa734cd4092904b1fc06d6012724be53720da39
- SSDEEP 768:ahP0kDE9N5dCA8J7VHXdrIniQaBTT+QQ+r1n4K8+C9TtIuCjaqUODvJVQ2H:WsWE9N5dFu53dsniQaB/xZ14n7zIF+qT
- TLSH T17B23F1DEFA177C6AF4B38E3D63030B354612AA3175AEE757186192DD2C31364CE41B2A
- MD5 SHA1 SHA512 SSDEEP TLSH