Analysis
- max time kernel
149s - max time network
94s - platform
windows11-21h2_x64 - resource
win11-20260513-en - resource tags
arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows - submitted
22/05/2026, 12:20
Behavioral task
behavioral1
Sample
tmp_u4gk63x.exe
Resource
win10ltsc2021-20260513-en
11 signatures
150 seconds
Behavioral task
behavioral2
Sample
tmp_u4gk63x.exe
Resource
win10v2004-20260513-en
12 signatures
150 seconds
General
- Target tmp_u4gk63x.exe
- Size 45KB
- Sample260522-phrxmaay8l
- SHA256 f12b6dd2ea07de530f5f139dd06f33a5a57eed25db16fc06e8381190b2f295fd
- MD5 d4bb4c126ea401f69a6060b65edca8d4
- SHA1 6e1d33ec95a440959ba8352ff0c11150f9d2d809
- SHA512 65d2eac28f8b3e42b45b54910ebb8835f81c5b9c84ef28c35d5956d5a6fbdf85629db2ef3adf2a9c9403879296be1d0bf6ddccc1b3b5f98f0f55a11afd69e578
- SSDEEP 768:ohP0kDE9N5dCA8J7VHXdrIniQaBTT+QQ+r1n4K8+C9TtIuCjaqUODvJVQ2V:UsWE9N5dFu53dsniQaB/xZ14n7zIF+q5
- TLSH T1BD23F1DEFA177C6AF4B38E3D63030B354612AA3175AEE757186192DD2C31364CE41B2A
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Executes dropped EXE 1 IoCs
pid Process 3296 bin.exe - Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2409539145-3342400454-2096821238-1000\Software\Microsoft\Windows\CurrentVersion\Run\43DE9D2D = "C:\\Users\\Admin\\AppData\\Roaming\\43DE9D2D\\bin.exe" winver.exe -
resource yara_rule behavioral3/memory/1196-0-0x0000000000400000-0x000000000041D000-memory.dmp upx behavioral3/files/0x001900000002b4e9-21.dat upx behavioral3/memory/3296-23-0x0000000000400000-0x000000000041D000-memory.dmp upx - Program crash 1 IoCs
pid pid_target Process procid_target 4740 4384 WerFault.exe 81 - 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 tmp_u4gk63x.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 4384 winver.exe 4384 winver.exe - Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 3184 Explorer.EXE - Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE Token: SeShutdownPrivilege 3184 Explorer.EXE Token: SeCreatePagefilePrivilege 3184 Explorer.EXE - Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 4384 winver.exe - Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 1196 wrote to memory of 4384 1196 tmp_u4gk63x.exe 81 PID 4384 wrote to memory of 3184 4384 winver.exe 54 PID 3184 wrote to memory of 1020 3184 Explorer.EXE PID 3184 wrote to memory of 1020 3184 Explorer.EXE PID 1020 wrote to memory of 3296 1020 Process not Found 83 PID 1020 wrote to memory of 3296 1020 Process not Found 83 PID 4384 wrote to memory of 2516 4384 winver.exe 51
Processes
-
C:\Windows\system32\sihost.exesihost.exe1⤵PID:2516
-
C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3184 -
C:\Users\Admin\AppData\Local\Temp\tmp_u4gk63x.exe"C:\Users\Admin\AppData\Local\Temp\tmp_u4gk63x.exe"2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1196 -
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:4384 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4384 -s 3804⤵
- Program crash
PID:4740
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C:\Users\Admin\AppData\Roaming\43DE9D2D\bin.exeC:\Users\Admin\AppData\Roaming\43DE9D2D\bin.exe1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:3296
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 364 -p 4384 -ip 43841⤵PID:4964
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Roaming\43DE9D2D\bin.exe
- Size 45KB
- SHA256 f393e9c8538fd76763583ffa5bc7fc27b457726da79cedea937c49c49725a00a
- MD5 cee3f2fc6c7477bc853f29558ad41094
- SHA1 d20f7ef7112daa80c85137e37beb72bd78c7e22b
- SHA512 6322214f8ddcae9067876269ce5d8d8e02dfff9c91ab5348a689ca3111f1da50ba4fd681a93f5c829449a3730aff1590a8cb1638b1f900bec1e0b75d86063c95
- SSDEEP 768:xhP0kDE9N5dCA8J7VHXdrIniQaBTT+QQ+r1n4K8+C9TtIuCjaqUODvJVQ2V:LsWE9N5dFu53dsniQaB/xZ14n7zIF+q5
- TLSH T11D23F1DEFA177C6AF4B38E3D63030B354612AA3175AEE757186192DD2C31364CE41B2A
- MD5 SHA1 SHA512 SSDEEP TLSH