Analysis
- max time kernel
149s - max time network
148s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows - submitted
02/06/2026, 01:28
Behavioral task
behavioral1
Sample
tmpxubtrb8z.exe
Resource
win10ltsc2021-20260513-en
12 signatures
150 seconds
Behavioral task
behavioral2
Sample
tmpxubtrb8z.exe
Resource
win10v2004-20260513-en
12 signatures
150 seconds
General
- Target tmpxubtrb8z.exe
- Size 110KB
- Sample260602-bvm8bab13l
- SHA256 9b28f3231269ace2e16d9b7532eaddc48a5c3dc12013e6f9181363540be57739
- MD5 9f366052c697dbd8649a21086f9c31c0
- SHA1 84e31fbd75c312913ddf6697cc4ab76841107db1
- SHA512 7a6f1bdbf90fca0b330201340ca6f4678ad2e8ece94f5c5680c960c4d112ad7d769b050aea1c56ef8f6dabc0bcad4f784ec0e12a120a99a1e9748011bd68e158
- SSDEEP 1536:PiLOvRmmQegJfBbmAQ256/ZrwWnwqjhurmKFcxL8JQ2r0Eg:PiyvRmDLs/ZrwWJjAqGcRJ2hg
- TLSH T172B34B62F204E88BE817D8F69919CD3168A33DBD4890455E32D9BF6D58B3AD30459F0F
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Executes dropped EXE 1 IoCs
pid Process 3308 bin.exe - Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1788976790-1541110888-1636651838-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\F6C257A8 = "C:\\Users\\Admin\\AppData\\Roaming\\F6C257A8\\bin.exe" winver.exe -
resource yara_rule behavioral2/memory/4996-0-0x0000000000400000-0x000000000041E000-memory.dmp upx behavioral2/files/0x000a000000024362-18.dat upx behavioral2/memory/3308-21-0x0000000000400000-0x000000000041E000-memory.dmp upx - Program crash 1 IoCs
pid pid_target Process procid_target 1752 3832 WerFault.exe 86 - 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 tmpxubtrb8z.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language winver.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language bin.exe - Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 3832 winver.exe 3832 winver.exe - Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 3388 Explorer.EXE - Suspicious use of AdjustPrivilegeToken 26 IoCs
description pid Process Token: SeShutdownPrivilege 3388 Explorer.EXE Token: SeCreatePagefilePrivilege 3388 Explorer.EXE Token: SeShutdownPrivilege 3388 Explorer.EXE Token: SeCreatePagefilePrivilege 3388 Explorer.EXE Token: SeShutdownPrivilege 3388 Explorer.EXE Token: SeCreatePagefilePrivilege 3388 Explorer.EXE Token: SeShutdownPrivilege 3388 Explorer.EXE Token: SeCreatePagefilePrivilege 3388 Explorer.EXE Token: SeShutdownPrivilege 3388 Explorer.EXE Token: SeCreatePagefilePrivilege 3388 Explorer.EXE Token: SeShutdownPrivilege 3388 Explorer.EXE Token: SeCreatePagefilePrivilege 3388 Explorer.EXE Token: SeShutdownPrivilege 3388 Explorer.EXE Token: SeCreatePagefilePrivilege 3388 Explorer.EXE Token: SeShutdownPrivilege 3388 Explorer.EXE Token: SeCreatePagefilePrivilege 3388 Explorer.EXE Token: SeShutdownPrivilege 3388 Explorer.EXE Token: SeCreatePagefilePrivilege 3388 Explorer.EXE Token: SeShutdownPrivilege 3388 Explorer.EXE Token: SeCreatePagefilePrivilege 3388 Explorer.EXE Token: SeShutdownPrivilege 3388 Explorer.EXE Token: SeCreatePagefilePrivilege 3388 Explorer.EXE Token: SeShutdownPrivilege 3388 Explorer.EXE Token: SeCreatePagefilePrivilege 3388 Explorer.EXE Token: SeShutdownPrivilege 3388 Explorer.EXE Token: SeCreatePagefilePrivilege 3388 Explorer.EXE - Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 3832 winver.exe - Suspicious use of UnmapMainImage 1 IoCs
pid Process 3388 Explorer.EXE - Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 4996 wrote to memory of 3832 4996 tmpxubtrb8z.exe 86 PID 3832 wrote to memory of 3388 3832 winver.exe 56 PID 3388 wrote to memory of 3144 3388 Explorer.EXE PID 3388 wrote to memory of 3144 3388 Explorer.EXE PID 3144 wrote to memory of 3308 3144 Process not Found 96 PID 3144 wrote to memory of 3308 3144 Process not Found 96 PID 3832 wrote to memory of 408 3832 winver.exe 51
Processes
-
C:\Windows\system32\sihost.exesihost.exe1⤵PID:408
-
C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3388 -
C:\Users\Admin\AppData\Local\Temp\tmpxubtrb8z.exe"C:\Users\Admin\AppData\Local\Temp\tmpxubtrb8z.exe"2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4996 -
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:3832 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3832 -s 3524⤵
- Program crash
PID:1752
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C:\Users\Admin\AppData\Roaming\F6C257A8\bin.exeC:\Users\Admin\AppData\Roaming\F6C257A8\bin.exe1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:3308
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3832 -ip 38321⤵PID:4340
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Roaming\F6C257A8\bin.exe
- Size 110KB
- SHA256 37ad0c77cc08f28984439bb2eef931e2c314308184dbcacb2736d1185ce2578b
- MD5 9cd449f0a56b8bf3fd9445e30498fd8e
- SHA1 dab645363e5a25228dbd2872546ab7c32e931ca2
- SHA512 665190e1c1c958935c7a1803cc394d22e8fc95f1caf2c6d35d9e28e55c8c29338bb02692b5b7913013b972a57e76eb0def9408a7d7343ea04409e0b3c8cf6a23
- SSDEEP 1536:/iLOvRmmQegJfBbmAQ256/ZrwWnwqjhurmKFcxL8JQ2r0Eg:/iyvRmDLs/ZrwWJjAqGcRJ2hg
- TLSH T1ABB34B62F204E88BE817D8F69919CD3168A33DBD4890455E32D9BF6D58B3AD30459F0F
- MD5 SHA1 SHA512 SSDEEP TLSH