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Analysis
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max time kernel
151s -
max time network
143s -
platform
windows7_x64 -
resource
win7-20220901-en -
resource tags
arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system -
submitted
02/10/2022, 15:37
Static task
static1
Behavioral task
behavioral1
Sample
f19ed2a23c55b0b92c5c2b5a2625d4e9fa7bdc159bb6aa87cc6af4da32c9584b.exe
Resource
win7-20220901-en
windows7-x64
9 signatures
150 seconds
Behavioral task
behavioral2
Sample
f19ed2a23c55b0b92c5c2b5a2625d4e9fa7bdc159bb6aa87cc6af4da32c9584b.exe
Resource
win10v2004-20220901-en
windows10-2004-x64
10 signatures
150 seconds
General
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Target
f19ed2a23c55b0b92c5c2b5a2625d4e9fa7bdc159bb6aa87cc6af4da32c9584b.exe
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Size
288KB
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MD5
7139a78e6c6e2319f0efcd9287bca0e9
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SHA1
94e1f7ed58fdb42d7f44a01b65467a355083ad87
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SHA256
f19ed2a23c55b0b92c5c2b5a2625d4e9fa7bdc159bb6aa87cc6af4da32c9584b
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SHA512
9be3761c756043622ffe23373f9501b3b784fa28befccb71be309a115581278e8e204412add022efd4cbf5fe0a7a1d142ccb7fb23ea89b3c197766583982f4da
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SSDEEP
6144:tMGubB2lqKhG0wF+kAbUtshbrm3X+DLKlzNgGVRwZBf5Wg9w9CXvn1OHyaFvF+5m:tENTJabvhfm3XJ1tipsL5
Score
10/10
Malware Config
Signatures
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Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" f19ed2a23c55b0b92c5c2b5a2625d4e9fa7bdc159bb6aa87cc6af4da32c9584b.exe Set value (int) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" tcroos.exe -
Executes dropped EXE 1 IoCs
pid Process 1620 tcroos.exe -
Loads dropped DLL 2 IoCs
pid Process 2024 f19ed2a23c55b0b92c5c2b5a2625d4e9fa7bdc159bb6aa87cc6af4da32c9584b.exe 2024 f19ed2a23c55b0b92c5c2b5a2625d4e9fa7bdc159bb6aa87cc6af4da32c9584b.exe -
Adds Run key to start application 2 TTPs 29 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /z" tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /a" tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /u" tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /v" tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /x" tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /b" tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /c" tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /i" tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /f" tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /g" tcroos.exe Key created \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\ f19ed2a23c55b0b92c5c2b5a2625d4e9fa7bdc159bb6aa87cc6af4da32c9584b.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /p" tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /l" tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /o" tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /d" tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /t" tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /y" tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /k" tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /h" tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /e" tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /n" tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /x" f19ed2a23c55b0b92c5c2b5a2625d4e9fa7bdc159bb6aa87cc6af4da32c9584b.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /r" tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /w" tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /m" tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /q" tcroos.exe Key created \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\ tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /j" tcroos.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\tcroos = "C:\\Users\\Admin\\tcroos.exe /s" tcroos.exe -
Maps connected drives based on registry 3 TTPs 4 IoCs
Disk information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum f19ed2a23c55b0b92c5c2b5a2625d4e9fa7bdc159bb6aa87cc6af4da32c9584b.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0 f19ed2a23c55b0b92c5c2b5a2625d4e9fa7bdc159bb6aa87cc6af4da32c9584b.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum tcroos.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0 tcroos.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 2024 f19ed2a23c55b0b92c5c2b5a2625d4e9fa7bdc159bb6aa87cc6af4da32c9584b.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe 1620 tcroos.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 2024 f19ed2a23c55b0b92c5c2b5a2625d4e9fa7bdc159bb6aa87cc6af4da32c9584b.exe 1620 tcroos.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2024 wrote to memory of 1620 2024 f19ed2a23c55b0b92c5c2b5a2625d4e9fa7bdc159bb6aa87cc6af4da32c9584b.exe 27 PID 2024 wrote to memory of 1620 2024 f19ed2a23c55b0b92c5c2b5a2625d4e9fa7bdc159bb6aa87cc6af4da32c9584b.exe 27 PID 2024 wrote to memory of 1620 2024 f19ed2a23c55b0b92c5c2b5a2625d4e9fa7bdc159bb6aa87cc6af4da32c9584b.exe 27 PID 2024 wrote to memory of 1620 2024 f19ed2a23c55b0b92c5c2b5a2625d4e9fa7bdc159bb6aa87cc6af4da32c9584b.exe 27
Processes
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C:\Users\Admin\AppData\Local\Temp\f19ed2a23c55b0b92c5c2b5a2625d4e9fa7bdc159bb6aa87cc6af4da32c9584b.exe"C:\Users\Admin\AppData\Local\Temp\f19ed2a23c55b0b92c5c2b5a2625d4e9fa7bdc159bb6aa87cc6af4da32c9584b.exe"1⤵
- Modifies visiblity of hidden/system files in Explorer
- Loads dropped DLL
- Adds Run key to start application
- Maps connected drives based on registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2024 -
C:\Users\Admin\tcroos.exe"C:\Users\Admin\tcroos.exe"2⤵
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- Adds Run key to start application
- Maps connected drives based on registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:1620
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
288KB
MD57139a78e6c6e2319f0efcd9287bca0e9
SHA194e1f7ed58fdb42d7f44a01b65467a355083ad87
SHA256f19ed2a23c55b0b92c5c2b5a2625d4e9fa7bdc159bb6aa87cc6af4da32c9584b
SHA5129be3761c756043622ffe23373f9501b3b784fa28befccb71be309a115581278e8e204412add022efd4cbf5fe0a7a1d142ccb7fb23ea89b3c197766583982f4da
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Filesize
288KB
MD57139a78e6c6e2319f0efcd9287bca0e9
SHA194e1f7ed58fdb42d7f44a01b65467a355083ad87
SHA256f19ed2a23c55b0b92c5c2b5a2625d4e9fa7bdc159bb6aa87cc6af4da32c9584b
SHA5129be3761c756043622ffe23373f9501b3b784fa28befccb71be309a115581278e8e204412add022efd4cbf5fe0a7a1d142ccb7fb23ea89b3c197766583982f4da
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Filesize
288KB
MD57139a78e6c6e2319f0efcd9287bca0e9
SHA194e1f7ed58fdb42d7f44a01b65467a355083ad87
SHA256f19ed2a23c55b0b92c5c2b5a2625d4e9fa7bdc159bb6aa87cc6af4da32c9584b
SHA5129be3761c756043622ffe23373f9501b3b784fa28befccb71be309a115581278e8e204412add022efd4cbf5fe0a7a1d142ccb7fb23ea89b3c197766583982f4da
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Filesize
288KB
MD57139a78e6c6e2319f0efcd9287bca0e9
SHA194e1f7ed58fdb42d7f44a01b65467a355083ad87
SHA256f19ed2a23c55b0b92c5c2b5a2625d4e9fa7bdc159bb6aa87cc6af4da32c9584b
SHA5129be3761c756043622ffe23373f9501b3b784fa28befccb71be309a115581278e8e204412add022efd4cbf5fe0a7a1d142ccb7fb23ea89b3c197766583982f4da