Analysis
- max time kernel
149s - max time network
150s - 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, 01:03
Behavioral task
behavioral1
Sample
tmpzzv9yylt.exe
Resource
win10ltsc2021-20260513-en
11 signatures
150 seconds
Behavioral task
behavioral2
Sample
tmpzzv9yylt.exe
Resource
win10v2004-20260513-en
13 signatures
150 seconds
General
- Target tmpzzv9yylt.exe
- Size 110KB
- Sample260602-bel1baas6s
- SHA256 f22e30ce79ae791b00f14772121b82f4867db82b5e8c70620a239fd31b547ac3
- MD5 5ebba44334469e30727fef88b334ae10
- SHA1 603783ab0dc69736338878c57eeb259a059f74f6
- SHA512 5a8961c51b2108168f174417e0daf45d3a0575d0384bf67df5a012a8b7b3d58c38ce2e440d6630827fce2d8bd81df96acc1a56fb10d31b937e513ef5dbad71a4
- SSDEEP 1536:xiLOvRmmQegJfBbmAQ256/ZrwWnwqjhurmKFcxL8JQ2r0Eg:xiyvRmDLs/ZrwWJjAqGcRJ2hg
- TLSH T1C5B34B62F204E88BE817D8F69919CD3168A33DBD4890855E32D9BF6D58B3AD30459F0F
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Executes dropped EXE 1 IoCs
pid Process 4200 bin.exe - Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-889581200-2041691093-2048517887-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\39B9BAFC = "C:\\Users\\Admin\\AppData\\Roaming\\39B9BAFC\\bin.exe" winver.exe -
resource yara_rule behavioral2/memory/1788-0-0x0000000000400000-0x000000000041E000-memory.dmp upx behavioral2/files/0x000800000002420c-19.dat upx behavioral2/memory/4200-21-0x0000000000400000-0x000000000041E000-memory.dmp upx - Program crash 1 IoCs
pid pid_target Process procid_target 2728 5116 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 tmpzzv9yylt.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 5116 winver.exe 5116 winver.exe - Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 3192 Explorer.EXE - Suspicious use of AdjustPrivilegeToken 12 IoCs
description pid Process Token: SeShutdownPrivilege 3192 Explorer.EXE Token: SeCreatePagefilePrivilege 3192 Explorer.EXE Token: SeShutdownPrivilege 3192 Explorer.EXE Token: SeCreatePagefilePrivilege 3192 Explorer.EXE Token: SeShutdownPrivilege 3192 Explorer.EXE Token: SeCreatePagefilePrivilege 3192 Explorer.EXE Token: SeShutdownPrivilege 3192 Explorer.EXE Token: SeCreatePagefilePrivilege 3192 Explorer.EXE Token: SeShutdownPrivilege 3192 Explorer.EXE Token: SeCreatePagefilePrivilege 3192 Explorer.EXE Token: SeShutdownPrivilege 3192 Explorer.EXE Token: SeCreatePagefilePrivilege 3192 Explorer.EXE - Suspicious use of FindShellTrayWindow 4 IoCs
pid Process 5116 winver.exe 3192 Explorer.EXE 3192 Explorer.EXE 3192 Explorer.EXE - Suspicious use of SendNotifyMessage 3 IoCs
pid Process 3192 Explorer.EXE 3192 Explorer.EXE 3192 Explorer.EXE - Suspicious use of UnmapMainImage 1 IoCs
pid Process 3192 Explorer.EXE - Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 1788 wrote to memory of 5116 1788 tmpzzv9yylt.exe 86 PID 5116 wrote to memory of 3192 5116 winver.exe 56 PID 3192 wrote to memory of 3312 3192 Explorer.EXE PID 3192 wrote to memory of 3312 3192 Explorer.EXE PID 3312 wrote to memory of 4200 3312 Process not Found 95 PID 3312 wrote to memory of 4200 3312 Process not Found 95 PID 5116 wrote to memory of 3004 5116 winver.exe 51
Processes
-
C:\Windows\system32\sihost.exesihost.exe1⤵PID:3004
-
C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3192 -
C:\Users\Admin\AppData\Local\Temp\tmpzzv9yylt.exe"C:\Users\Admin\AppData\Local\Temp\tmpzzv9yylt.exe"2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1788 -
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:5116 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 5116 -s 3524⤵
- Program crash
PID:2728
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-
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C:\Users\Admin\AppData\Roaming\39B9BAFC\bin.exeC:\Users\Admin\AppData\Roaming\39B9BAFC\bin.exe1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:4200
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 5116 -ip 51161⤵PID:3184
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Roaming\39B9BAFC\bin.exe
- Size 110KB
- SHA256 47216e5a9568e2f6d82735e7052f4385172c892795772720eb328bae9df1380b
- MD5 bc3059071e97f7f9aa17345329b1cca3
- SHA1 6c2e8b6fff60b1006ade8e52dd46272032e32791
- SHA512 27752739a795b6e09cc7aa79741d6d03332e9af2b10a3ef5c2c9e6904e1de749ef4e23cd06adfcbaf6488c39237f6168b43ee1e2c190dad1659521856a353893
- SSDEEP 1536:aiLOvRmmQegJfBbmAQ256/ZrwWnwqjhurmKFcxL8JQ2r0Eg:aiyvRmDLs/ZrwWJjAqGcRJ2hg
- TLSH T1A6B34B62F204E88BE817D8F69919CD3168A33DBD4890455E32D9BF6D58B3AD30459F0F
- MD5 SHA1 SHA512 SSDEEP TLSH