Analysis
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max time kernel
150s -
max time network
49s -
platform
windows7_x64 -
resource
win7-20220901-en -
resource tags
arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system -
submitted
29/10/2022, 16:05
Static task
static1
Behavioral task
behavioral1
Sample
b88b5a16ac06c8c419e48aee0c7336999d7ba367a04cafd29daec2d54591f2b3.exe
Resource
win7-20220901-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
b88b5a16ac06c8c419e48aee0c7336999d7ba367a04cafd29daec2d54591f2b3.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
b88b5a16ac06c8c419e48aee0c7336999d7ba367a04cafd29daec2d54591f2b3.exe
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Size
212KB
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MD5
4bd3f3b6f667a748a232877d6d3ee2a0
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SHA1
17e2f022911e2eb968a8f3d7a690e40f3744682c
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SHA256
b88b5a16ac06c8c419e48aee0c7336999d7ba367a04cafd29daec2d54591f2b3
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SHA512
1b609d31b4c1e622a51ae03e8bef52e409282b7a5943dff29792ba78dac76dc0e9bf582832cda066279d5aa2dd8cffc81d5b9e2fc23eaef292b12e41edeb4740
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SSDEEP
3072:mVbPD2g8h7kvHYJJEbncAXp4wiY3fXfLqus2RrMh9VsgV2Ksb+ET8/3TYhPR+fAu:i87kvHYJ4tdysb+duWMs
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" b88b5a16ac06c8c419e48aee0c7336999d7ba367a04cafd29daec2d54591f2b3.exe Set value (int) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" cauxuf.exe -
Executes dropped EXE 1 IoCs
pid Process 1820 cauxuf.exe -
Loads dropped DLL 2 IoCs
pid Process 1604 b88b5a16ac06c8c419e48aee0c7336999d7ba367a04cafd29daec2d54591f2b3.exe 1604 b88b5a16ac06c8c419e48aee0c7336999d7ba367a04cafd29daec2d54591f2b3.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\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /w" cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /n" b88b5a16ac06c8c419e48aee0c7336999d7ba367a04cafd29daec2d54591f2b3.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /a" cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /f" cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /t" cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /x" cauxuf.exe Key created \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\ b88b5a16ac06c8c419e48aee0c7336999d7ba367a04cafd29daec2d54591f2b3.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /p" cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /j" cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /i" cauxuf.exe Key created \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\ cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /h" cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /e" cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /m" cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /v" cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /q" cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /k" cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /z" cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /c" cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /b" cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /l" cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /s" cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /r" cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /g" cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /u" cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /y" cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /d" cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /n" cauxuf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\cauxuf = "C:\\Users\\Admin\\cauxuf.exe /o" cauxuf.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 1604 b88b5a16ac06c8c419e48aee0c7336999d7ba367a04cafd29daec2d54591f2b3.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe 1820 cauxuf.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 1604 b88b5a16ac06c8c419e48aee0c7336999d7ba367a04cafd29daec2d54591f2b3.exe 1820 cauxuf.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 1604 wrote to memory of 1820 1604 b88b5a16ac06c8c419e48aee0c7336999d7ba367a04cafd29daec2d54591f2b3.exe 27 PID 1604 wrote to memory of 1820 1604 b88b5a16ac06c8c419e48aee0c7336999d7ba367a04cafd29daec2d54591f2b3.exe 27 PID 1604 wrote to memory of 1820 1604 b88b5a16ac06c8c419e48aee0c7336999d7ba367a04cafd29daec2d54591f2b3.exe 27 PID 1604 wrote to memory of 1820 1604 b88b5a16ac06c8c419e48aee0c7336999d7ba367a04cafd29daec2d54591f2b3.exe 27
Processes
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C:\Users\Admin\AppData\Local\Temp\b88b5a16ac06c8c419e48aee0c7336999d7ba367a04cafd29daec2d54591f2b3.exe"C:\Users\Admin\AppData\Local\Temp\b88b5a16ac06c8c419e48aee0c7336999d7ba367a04cafd29daec2d54591f2b3.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:1604 -
C:\Users\Admin\cauxuf.exe"C:\Users\Admin\cauxuf.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:1820
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
212KB
MD5e25caa28f79af4d94ac306c662fe4d15
SHA14fd3c116137a533656dea7a55dd9c9945df730db
SHA256705e49240176d3a76600a2f02ab6dde8be59fc61f3e29680aa96da466e5e13e0
SHA51258166fd1de28910f14135544cf5a9b6f00e480800349312e11b1ee05a3467027c77b4248e2f4b34159b8fa16c834ab61218da25e9f8ceb5fa3c55d33527af313
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Filesize
212KB
MD5e25caa28f79af4d94ac306c662fe4d15
SHA14fd3c116137a533656dea7a55dd9c9945df730db
SHA256705e49240176d3a76600a2f02ab6dde8be59fc61f3e29680aa96da466e5e13e0
SHA51258166fd1de28910f14135544cf5a9b6f00e480800349312e11b1ee05a3467027c77b4248e2f4b34159b8fa16c834ab61218da25e9f8ceb5fa3c55d33527af313
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Filesize
212KB
MD5e25caa28f79af4d94ac306c662fe4d15
SHA14fd3c116137a533656dea7a55dd9c9945df730db
SHA256705e49240176d3a76600a2f02ab6dde8be59fc61f3e29680aa96da466e5e13e0
SHA51258166fd1de28910f14135544cf5a9b6f00e480800349312e11b1ee05a3467027c77b4248e2f4b34159b8fa16c834ab61218da25e9f8ceb5fa3c55d33527af313
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Filesize
212KB
MD5e25caa28f79af4d94ac306c662fe4d15
SHA14fd3c116137a533656dea7a55dd9c9945df730db
SHA256705e49240176d3a76600a2f02ab6dde8be59fc61f3e29680aa96da466e5e13e0
SHA51258166fd1de28910f14135544cf5a9b6f00e480800349312e11b1ee05a3467027c77b4248e2f4b34159b8fa16c834ab61218da25e9f8ceb5fa3c55d33527af313