Analysis
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max time kernel
152s -
max time network
142s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
19/10/2022, 14:26
Behavioral task
behavioral1
Sample
3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe
Resource
win7-20220901-en
windows7-x64
17 signatures
150 seconds
Behavioral task
behavioral2
Sample
3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
12 signatures
150 seconds
General
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Target
3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe
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Size
248KB
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MD5
a123251af864122aa944e99d145b0051
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SHA1
ef8aef577bb37e2badd7d2705eebf9c83b156b42
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SHA256
3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8
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SHA512
ee62b85b66dc71811148d10d57b4b7d58df07d3cd63a50e2aad8c7d2d092d1ab300f5d48f7c63b1a31c6d98c9ec38b8a9e3c4cc07a8e2d2e2a6e84a95ebfccf9
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SSDEEP
6144:huMJWY+qaHEQCcYfSBYJbQCjRcqESEgm6Anhc1kG6EmRzxs:h+YcUc6SBLLTSEgBAnhc1kGsxs
Score
10/10
Malware Config
Signatures
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Modifies WinLogon for persistence 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe NOTEPAD1.exe" 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe -
Disables RegEdit via registry modification 1 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1" 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe -
Disables Task Manager via registry modification
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resource yara_rule behavioral2/memory/5068-132-0x0000000000400000-0x000000000049AF8B-memory.dmp upx behavioral2/memory/5068-137-0x0000000000400000-0x000000000049AF8B-memory.dmp upx -
Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\Run 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Yahoo Messengger = "C:\\Windows\\system32\\NOTEPAD1.exe" 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe -
Enumerates connected drives 3 TTPs 24 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
description ioc Process File opened (read-only) \??\o: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened (read-only) \??\t: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened (read-only) \??\u: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened (read-only) \??\v: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened (read-only) \??\b: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened (read-only) \??\f: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened (read-only) \??\p: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened (read-only) \??\r: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened (read-only) \??\s: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened (read-only) \??\y: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened (read-only) \??\z: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened (read-only) \??\e: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened (read-only) \??\g: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened (read-only) \??\l: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened (read-only) \??\w: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened (read-only) \??\x: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened (read-only) \??\q: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened (read-only) \??\a: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened (read-only) \??\h: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened (read-only) \??\i: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened (read-only) \??\j: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened (read-only) \??\k: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened (read-only) \??\m: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened (read-only) \??\n: 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe -
AutoIT Executable 1 IoCs
AutoIT scripts compiled to PE executables.
resource yara_rule behavioral2/memory/5068-137-0x0000000000400000-0x000000000049AF8B-memory.dmp autoit_exe -
Drops file in System32 directory 5 IoCs
description ioc Process File created C:\Windows\SysWOW64\NOTEPAD1.exe 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened for modification C:\Windows\SysWOW64\NOTEPAD1.exe 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File created C:\Windows\SysWOW64\WORD.exe 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened for modification C:\Windows\SysWOW64\WORD.exe 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened for modification C:\Windows\SysWOW64\autorun.ini 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe -
Drops file in Windows directory 2 IoCs
description ioc Process File created C:\Windows\NOTEPAD1.exe 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe File opened for modification C:\Windows\NOTEPAD1.exe 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.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 26 IoCs
pid Process 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe -
Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 5068 wrote to memory of 4480 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 83 PID 5068 wrote to memory of 4480 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 83 PID 5068 wrote to memory of 4480 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 83 PID 4480 wrote to memory of 2752 4480 cmd.exe 85 PID 4480 wrote to memory of 2752 4480 cmd.exe 85 PID 4480 wrote to memory of 2752 4480 cmd.exe 85 PID 5068 wrote to memory of 3504 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 86 PID 5068 wrote to memory of 3504 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 86 PID 5068 wrote to memory of 3504 5068 3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe 86 PID 3504 wrote to memory of 2348 3504 cmd.exe 88 PID 3504 wrote to memory of 2348 3504 cmd.exe 88 PID 3504 wrote to memory of 2348 3504 cmd.exe 88
Processes
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C:\Users\Admin\AppData\Local\Temp\3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe"C:\Users\Admin\AppData\Local\Temp\3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe"1⤵
- Modifies WinLogon for persistence
- Disables RegEdit via registry modification
- Adds Run key to start application
- Enumerates connected drives
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:5068 -
C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /C AT /delete /yes2⤵
- Suspicious use of WriteProcessMemory
PID:4480 -
C:\Windows\SysWOW64\at.exeAT /delete /yes3⤵PID:2752
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /C AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\WORD.exe2⤵
- Suspicious use of WriteProcessMemory
PID:3504 -
C:\Windows\SysWOW64\at.exeAT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\WORD.exe3⤵PID:2348
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