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, 00:52
Behavioral task
behavioral1
Sample
tmpjcjrvbsp.exe
Resource
win10ltsc2021-20260513-en
11 signatures
150 seconds
Behavioral task
behavioral2
Sample
tmpjcjrvbsp.exe
Resource
win10v2004-20260513-en
12 signatures
150 seconds
General
- Target tmpjcjrvbsp.exe
- Size 45KB
- Sample260602-a73cbsh151
- SHA256 a6262b8f0b676bb2870e5cec39e8c1c325e7012d2f726f0061ee7d90e5ad7ef2
- MD5 d277ba0e2e1629990f55bd5ec2387fc0
- SHA1 55536de3a236cddecc6b171bf8634695ec6eda96
- SHA512 b532aabf358e894197e97dba8cb896f324fdfd381c933c3254c5b9ed9a2b18c4dc81f258ae9706aa860ec71a68778f0b79a58fb80842b0e56a3135d74d37570b
- SSDEEP 768:PhP0kDE9N5dCA8J7VHXdrIniQaBTT+QQ+r1n4K8+C9TtIuCjaqUODvJVQ23:ZsWE9N5dFu53dsniQaB/xZ14n7zIF+qj
- TLSH T18223F1DEFA17BC6AF4B38E3D63030B354612AA3175AEE757186152DD2C31364CE41B2A
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Executes dropped EXE 1 IoCs
pid Process 4020 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\1F056380 = "C:\\Users\\Admin\\AppData\\Roaming\\1F056380\\bin.exe" winver.exe -
resource yara_rule behavioral2/memory/4908-0-0x0000000000400000-0x000000000041D000-memory.dmp upx behavioral2/files/0x0002000000022c45-23.dat upx behavioral2/memory/4020-22-0x0000000000400000-0x000000000041D000-memory.dmp upx - Program crash 1 IoCs
pid pid_target Process procid_target 2500 552 WerFault.exe 89 - 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 tmpjcjrvbsp.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 552 winver.exe 552 winver.exe - Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 3272 Explorer.EXE - Suspicious use of AdjustPrivilegeToken 10 IoCs
description pid Process Token: SeShutdownPrivilege 3272 Explorer.EXE Token: SeCreatePagefilePrivilege 3272 Explorer.EXE Token: SeShutdownPrivilege 3272 Explorer.EXE Token: SeCreatePagefilePrivilege 3272 Explorer.EXE Token: SeShutdownPrivilege 3272 Explorer.EXE Token: SeCreatePagefilePrivilege 3272 Explorer.EXE Token: SeShutdownPrivilege 3272 Explorer.EXE Token: SeCreatePagefilePrivilege 3272 Explorer.EXE Token: SeShutdownPrivilege 3272 Explorer.EXE Token: SeCreatePagefilePrivilege 3272 Explorer.EXE - Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 552 winver.exe - Suspicious use of UnmapMainImage 1 IoCs
pid Process 3272 Explorer.EXE - Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 4908 wrote to memory of 552 4908 tmpjcjrvbsp.exe 89 PID 552 wrote to memory of 3272 552 winver.exe 56 PID 3272 wrote to memory of 376 3272 Explorer.EXE PID 3272 wrote to memory of 376 3272 Explorer.EXE PID 376 wrote to memory of 4020 376 Process not Found 91 PID 376 wrote to memory of 4020 376 Process not Found 91 PID 552 wrote to memory of 3056 552 winver.exe 51
Processes
-
C:\Windows\system32\sihost.exesihost.exe1⤵PID:3056
-
C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3272 -
C:\Users\Admin\AppData\Local\Temp\tmpjcjrvbsp.exe"C:\Users\Admin\AppData\Local\Temp\tmpjcjrvbsp.exe"2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4908 -
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:552 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 552 -s 3564⤵
- Program crash
PID:2500
-
-
-
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C:\Users\Admin\AppData\Roaming\1F056380\bin.exeC:\Users\Admin\AppData\Roaming\1F056380\bin.exe1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:4020
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 552 -ip 5521⤵PID:2576
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Roaming\1F056380\bin.exe
- Size 45KB
- SHA256 c3fbf35653ea10f9758151a2b8cc09f56e7ce75d6c71782b897226cd4400fcc7
- MD5 2f20f109ce5eeb536ac269ead406ce1d
- SHA1 07508bae4b3653a2c49a1d3fd9dc0c3605a98181
- SHA512 0bc0f38077b34786c14c9ff828739f2203011ca6f6aec2c7b0f7c289e9e9f645eb9cbc3c70eff8cdaac5fd09f1254aac6574104dd9b1594f59909f8b5624d19e
- SSDEEP 768:PhP0kDE9N5dCA8J7VHXdrIniQaBTT+QQ+r1n4K8+C9TtIuCjaqUODvJVQ23:ZsWE9N5dFu53dsniQaB/xZ14n7zIF+qj
- TLSH T1FA23F1DEFA17BC6AF4B38E3D63030B354612AA3175AEE757186152DD2C31364CE41B2A
- MD5 SHA1 SHA512 SSDEEP TLSH