Analysis
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max time kernel
119s -
max time network
94s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
17-08-2024 12:20
Static task
static1
Behavioral task
behavioral1
Sample
f311887894ff39840a5e713b58489d00N.exe
Resource
win7-20240729-en
Behavioral task
behavioral2
Sample
f311887894ff39840a5e713b58489d00N.exe
Resource
win10v2004-20240802-en
General
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Target
f311887894ff39840a5e713b58489d00N.exe
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Size
463KB
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MD5
f311887894ff39840a5e713b58489d00
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SHA1
d1f64b06bdff758b403c57d3977bba2e1a628c8d
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SHA256
ec11ac94782a7a6d4b6f6026ee0064b42aa4c7c14d9b6459cd9db396aebcbdc2
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SHA512
33430508c86c6c160bf1fa4d7ada993c5610064fc1db78a4abfd6ef3cdcea7d69f7e5f403c1b97efc321ef06992d0c807a95624b418d13be80a090196b66613c
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SSDEEP
12288:Grlc87eqqV5e+wBV6O+1QlgMaAbhNXD4G4gvqSWri28:GrSqqHeVBxNGMaAbhNzp4gvqSQ
Malware Config
Signatures
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Executes dropped EXE 3 IoCs
pid Process 1712 efsull32.exe 1076 autotall.exe 2004 ~6726.tmp -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dplaNAME = "C:\\Users\\Admin\\AppData\\Roaming\\iexpHost\\efsull32.exe" f311887894ff39840a5e713b58489d00N.exe -
Drops file in System32 directory 1 IoCs
description ioc Process File created C:\Windows\SysWOW64\autotall.exe f311887894ff39840a5e713b58489d00N.exe -
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 f311887894ff39840a5e713b58489d00N.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language efsull32.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language autotall.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-1-5-21-2718105630-359604950-2820636825-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance\ Explorer.EXE -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 1712 efsull32.exe 1712 efsull32.exe 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE 3404 Explorer.EXE -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1712 efsull32.exe -
Suspicious use of UnmapMainImage 1 IoCs
pid Process 3404 Explorer.EXE -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 3652 wrote to memory of 1712 3652 f311887894ff39840a5e713b58489d00N.exe 88 PID 3652 wrote to memory of 1712 3652 f311887894ff39840a5e713b58489d00N.exe 88 PID 3652 wrote to memory of 1712 3652 f311887894ff39840a5e713b58489d00N.exe 88 PID 1712 wrote to memory of 2004 1712 efsull32.exe 90 PID 1712 wrote to memory of 2004 1712 efsull32.exe 90 PID 2004 wrote to memory of 3404 2004 ~6726.tmp 56
Processes
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of UnmapMainImage
PID:3404 -
C:\Users\Admin\AppData\Local\Temp\f311887894ff39840a5e713b58489d00N.exe"C:\Users\Admin\AppData\Local\Temp\f311887894ff39840a5e713b58489d00N.exe"2⤵
- Adds Run key to start application
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3652 -
C:\Users\Admin\AppData\Roaming\iexpHost\efsull32.exe"C:\Users\Admin\AppData\Roaming\iexpHost"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1712 -
C:\Users\Admin\AppData\Local\Temp\~6726.tmp3404 474632 1712 14⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:2004
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C:\Windows\SysWOW64\autotall.exeC:\Windows\SysWOW64\autotall.exe -s1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:1076
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
8KB
MD586dc243576cf5c7445451af37631eea9
SHA199a81c47c4c02f32c0ab456bfa23c306c7a09bf9
SHA25625d2a671e1b5b5b95697ac0234ce4d46e0d0894919521b54aabebd9daecf994a
SHA512c7310524f9b65f811146c1eb6ae944966351ac88a95fbc1ac422d8810730e5e212a7e28090ad758ea23c96ba38073e7fcf42460575e7f09dbc759a45c5d5a4a4
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Filesize
463KB
MD5252a0ac3b4b045ca773c6534886cad9e
SHA1257ae51aa8dafbd996e8390cdfb0bee3fb5e7765
SHA256672595c983a7d2ace079e8d4510d9d5e8911f2509f8b8a7e9dda3132ecd17f27
SHA512b239d024e2027b908306dde0bac09a0828054cd8932f56ca59b35cee466312b13abde2e976e2b66541e7cf8d5fcbf554a9c601384d59170846f72008ab3f3063