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Analysis
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max time kernel
190s -
max time network
105s -
platform
windows7_x64 -
resource
win7-20221111-en -
resource tags
arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system -
submitted
01/12/2022, 23:05
Static task
static1
Behavioral task
behavioral1
Sample
973c97e5bfe9dca2a84d7af159f68f4eaa375152d5462075c3c9985ce7d71241.exe
Resource
win7-20221111-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
973c97e5bfe9dca2a84d7af159f68f4eaa375152d5462075c3c9985ce7d71241.exe
Resource
win10v2004-20221111-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
973c97e5bfe9dca2a84d7af159f68f4eaa375152d5462075c3c9985ce7d71241.exe
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Size
148KB
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MD5
3b36af6ce4cc21a02b31d939286177a9
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SHA1
aec6ce21c3692a7de4368542d179f1cbdf9dbd88
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SHA256
973c97e5bfe9dca2a84d7af159f68f4eaa375152d5462075c3c9985ce7d71241
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SHA512
4e98b7704ab01c57768d563140968611b59a4f4d5d1db30c26c70e5cecceebe65a7531761b5cde50bc4965134727c8bc80969ed8f6c480aeba6b600c8ee9cda7
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SSDEEP
1536:5o9LXOf4BlqPAKaxnX+PBcRlouQvSPouXZ6D6Jj5wl+dwCMZUbP7VBTqJf2YhxYM:WBKalqPpM+Pco6ouZ68Kl+dnMZUb5
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-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" 973c97e5bfe9dca2a84d7af159f68f4eaa375152d5462075c3c9985ce7d71241.exe Set value (int) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" ylnuz.exe -
Executes dropped EXE 1 IoCs
pid Process 852 ylnuz.exe -
Loads dropped DLL 2 IoCs
pid Process 1696 973c97e5bfe9dca2a84d7af159f68f4eaa375152d5462075c3c9985ce7d71241.exe 1696 973c97e5bfe9dca2a84d7af159f68f4eaa375152d5462075c3c9985ce7d71241.exe -
Adds Run key to start application 2 TTPs 28 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /s" ylnuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /w" ylnuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /h" ylnuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /o" ylnuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /g" ylnuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /z" ylnuz.exe Key created \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ 973c97e5bfe9dca2a84d7af159f68f4eaa375152d5462075c3c9985ce7d71241.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /d" ylnuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /e" ylnuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /l" 973c97e5bfe9dca2a84d7af159f68f4eaa375152d5462075c3c9985ce7d71241.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /r" ylnuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /k" ylnuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /i" ylnuz.exe Key created \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ ylnuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /c" ylnuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /n" ylnuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /l" ylnuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /b" ylnuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /m" ylnuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /u" ylnuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /j" ylnuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /t" ylnuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /a" ylnuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /v" ylnuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /p" ylnuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /y" ylnuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /x" ylnuz.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\ylnuz = "C:\\Users\\Admin\\ylnuz.exe /f" ylnuz.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 1696 973c97e5bfe9dca2a84d7af159f68f4eaa375152d5462075c3c9985ce7d71241.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe 852 ylnuz.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 1696 973c97e5bfe9dca2a84d7af159f68f4eaa375152d5462075c3c9985ce7d71241.exe 852 ylnuz.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 1696 wrote to memory of 852 1696 973c97e5bfe9dca2a84d7af159f68f4eaa375152d5462075c3c9985ce7d71241.exe 28 PID 1696 wrote to memory of 852 1696 973c97e5bfe9dca2a84d7af159f68f4eaa375152d5462075c3c9985ce7d71241.exe 28 PID 1696 wrote to memory of 852 1696 973c97e5bfe9dca2a84d7af159f68f4eaa375152d5462075c3c9985ce7d71241.exe 28 PID 1696 wrote to memory of 852 1696 973c97e5bfe9dca2a84d7af159f68f4eaa375152d5462075c3c9985ce7d71241.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\973c97e5bfe9dca2a84d7af159f68f4eaa375152d5462075c3c9985ce7d71241.exe"C:\Users\Admin\AppData\Local\Temp\973c97e5bfe9dca2a84d7af159f68f4eaa375152d5462075c3c9985ce7d71241.exe"1⤵
- Modifies visiblity of hidden/system files in Explorer
- Loads dropped DLL
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1696 -
C:\Users\Admin\ylnuz.exe"C:\Users\Admin\ylnuz.exe"2⤵
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:852
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
148KB
MD5b8caa1e4cf669935c02b8ea6c39b87c1
SHA1c8a38e6e897ffc60e52c1f76d8383b714c8715c9
SHA256888bb366e64788a3a90dc5e854422920af3e3442c65800711f33957b75df4c19
SHA5124b1e3431eb5c5d0197b85100cb4329b8f4dea7d63a2749371241873ba0dd42de3d6d7fcd627e3f8d3eeeaffd11dc91dfd0a46d7bde694a0afea3220a58c1c596
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Filesize
148KB
MD5b8caa1e4cf669935c02b8ea6c39b87c1
SHA1c8a38e6e897ffc60e52c1f76d8383b714c8715c9
SHA256888bb366e64788a3a90dc5e854422920af3e3442c65800711f33957b75df4c19
SHA5124b1e3431eb5c5d0197b85100cb4329b8f4dea7d63a2749371241873ba0dd42de3d6d7fcd627e3f8d3eeeaffd11dc91dfd0a46d7bde694a0afea3220a58c1c596
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Filesize
148KB
MD5b8caa1e4cf669935c02b8ea6c39b87c1
SHA1c8a38e6e897ffc60e52c1f76d8383b714c8715c9
SHA256888bb366e64788a3a90dc5e854422920af3e3442c65800711f33957b75df4c19
SHA5124b1e3431eb5c5d0197b85100cb4329b8f4dea7d63a2749371241873ba0dd42de3d6d7fcd627e3f8d3eeeaffd11dc91dfd0a46d7bde694a0afea3220a58c1c596
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Filesize
148KB
MD5b8caa1e4cf669935c02b8ea6c39b87c1
SHA1c8a38e6e897ffc60e52c1f76d8383b714c8715c9
SHA256888bb366e64788a3a90dc5e854422920af3e3442c65800711f33957b75df4c19
SHA5124b1e3431eb5c5d0197b85100cb4329b8f4dea7d63a2749371241873ba0dd42de3d6d7fcd627e3f8d3eeeaffd11dc91dfd0a46d7bde694a0afea3220a58c1c596