Analysis
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max time kernel
155s -
max time network
159s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system -
submitted
30/10/2022, 20:18
Static task
static1
Behavioral task
behavioral1
Sample
a98a5993f18212eeee6f15f69778b978bb9f8246eee8b1403f547677c8769915.exe
Resource
win7-20220812-en
windows7-x64
9 signatures
150 seconds
Behavioral task
behavioral2
Sample
a98a5993f18212eeee6f15f69778b978bb9f8246eee8b1403f547677c8769915.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
9 signatures
150 seconds
General
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Target
a98a5993f18212eeee6f15f69778b978bb9f8246eee8b1403f547677c8769915.exe
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Size
88KB
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MD5
91c27587ccd95a28863ddc8fb60b6ea0
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SHA1
dc065b31e09bd3f3d0672bbd6c4226a7d40f11e5
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SHA256
a98a5993f18212eeee6f15f69778b978bb9f8246eee8b1403f547677c8769915
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SHA512
1e7d33d69d2c131f163bd6ec9f9acbe7ac6b1cb6060f8ab8976f88c03c4b4cb0028e71cb13a5a73c0cf6e2ff9ae0b7f620e079ba4c5911871233b52fbd9f9a03
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SSDEEP
1536:/fuvfCqG84caEz0+nCsNAhz74yWzVaCQdGV4KW:O684vz74yOsrG5W
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-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" a98a5993f18212eeee6f15f69778b978bb9f8246eee8b1403f547677c8769915.exe Set value (int) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" yixaw.exe -
Executes dropped EXE 1 IoCs
pid Process 2044 yixaw.exe -
Loads dropped DLL 2 IoCs
pid Process 364 a98a5993f18212eeee6f15f69778b978bb9f8246eee8b1403f547677c8769915.exe 364 a98a5993f18212eeee6f15f69778b978bb9f8246eee8b1403f547677c8769915.exe -
Adds Run key to start application 2 TTPs 58 IoCs
description ioc Process Key created \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\ yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /m" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /v" yixaw.exe Key created \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\ a98a5993f18212eeee6f15f69778b978bb9f8246eee8b1403f547677c8769915.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /j" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /b" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /u" yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /b" yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /k" yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /d" yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /e" yixaw.exe Key created \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\ yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /i" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /f" yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /q" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /p" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /s" yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /s" yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /g" yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /c" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /n" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /i" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /q" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /z" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /y" yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /u" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /a" yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /a" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /l" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /h" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /w" yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /l" yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /p" yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /x" yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /v" yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /f" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /t" yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /r" yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /z" yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /y" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /k" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /e" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /r" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /o" yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /w" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /x" a98a5993f18212eeee6f15f69778b978bb9f8246eee8b1403f547677c8769915.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /n" yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /h" yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /j" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /c" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /d" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /g" yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /e" a98a5993f18212eeee6f15f69778b978bb9f8246eee8b1403f547677c8769915.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /x" yixaw.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /m" yixaw.exe Key created \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\ a98a5993f18212eeee6f15f69778b978bb9f8246eee8b1403f547677c8769915.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /t" yixaw.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\yixaw = "C:\\Users\\Admin\\yixaw.exe /o" yixaw.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 364 a98a5993f18212eeee6f15f69778b978bb9f8246eee8b1403f547677c8769915.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe 2044 yixaw.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 2044 yixaw.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 364 a98a5993f18212eeee6f15f69778b978bb9f8246eee8b1403f547677c8769915.exe 2044 yixaw.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 364 wrote to memory of 2044 364 a98a5993f18212eeee6f15f69778b978bb9f8246eee8b1403f547677c8769915.exe 27 PID 364 wrote to memory of 2044 364 a98a5993f18212eeee6f15f69778b978bb9f8246eee8b1403f547677c8769915.exe 27 PID 364 wrote to memory of 2044 364 a98a5993f18212eeee6f15f69778b978bb9f8246eee8b1403f547677c8769915.exe 27 PID 364 wrote to memory of 2044 364 a98a5993f18212eeee6f15f69778b978bb9f8246eee8b1403f547677c8769915.exe 27
Processes
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C:\Users\Admin\AppData\Local\Temp\a98a5993f18212eeee6f15f69778b978bb9f8246eee8b1403f547677c8769915.exe"C:\Users\Admin\AppData\Local\Temp\a98a5993f18212eeee6f15f69778b978bb9f8246eee8b1403f547677c8769915.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:364 -
C:\Users\Admin\yixaw.exe"C:\Users\Admin\yixaw.exe"2⤵
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:2044
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
88KB
MD515784e15a31fc046057e6d39960b378a
SHA1ed040835dcec8a660e5798e79f21b0a0ee64c06e
SHA2564ba671e5fbb2caeb135dbbfcba2ef017b43f677b17f9319b76aee620c05388dc
SHA51235d56d371d63a04f6c2184e7355a37e23aa79cf1def5e2cf2cc43822f9574de6ba979b17347d8b2f41e635515a3c17c9c754da6aae27777faab7ad9c8f95fa51
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Filesize
88KB
MD515784e15a31fc046057e6d39960b378a
SHA1ed040835dcec8a660e5798e79f21b0a0ee64c06e
SHA2564ba671e5fbb2caeb135dbbfcba2ef017b43f677b17f9319b76aee620c05388dc
SHA51235d56d371d63a04f6c2184e7355a37e23aa79cf1def5e2cf2cc43822f9574de6ba979b17347d8b2f41e635515a3c17c9c754da6aae27777faab7ad9c8f95fa51
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Filesize
88KB
MD515784e15a31fc046057e6d39960b378a
SHA1ed040835dcec8a660e5798e79f21b0a0ee64c06e
SHA2564ba671e5fbb2caeb135dbbfcba2ef017b43f677b17f9319b76aee620c05388dc
SHA51235d56d371d63a04f6c2184e7355a37e23aa79cf1def5e2cf2cc43822f9574de6ba979b17347d8b2f41e635515a3c17c9c754da6aae27777faab7ad9c8f95fa51
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Filesize
88KB
MD515784e15a31fc046057e6d39960b378a
SHA1ed040835dcec8a660e5798e79f21b0a0ee64c06e
SHA2564ba671e5fbb2caeb135dbbfcba2ef017b43f677b17f9319b76aee620c05388dc
SHA51235d56d371d63a04f6c2184e7355a37e23aa79cf1def5e2cf2cc43822f9574de6ba979b17347d8b2f41e635515a3c17c9c754da6aae27777faab7ad9c8f95fa51