Analysis
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max time kernel
51s -
max time network
72s -
platform
windows10_x64 -
resource
win10-20220414-en -
submitted
14-07-2022 23:53
Static task
static1
Behavioral task
behavioral1
Sample
winrar600.exe
Resource
win10-20220414-en
General
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Target
winrar600.exe
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Size
2.9MB
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MD5
c74862e16bcc2b0e02cadb7ab14e3cd6
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SHA1
6569aa87d28db836d7d3380b32a83654f3e909cf
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SHA256
aff4bb9b15bccff67a112a7857d28d3f2f436e2e42f11be14930fe496269d573
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SHA512
d28fbfd2b75789d85f402190b25bc7649bcde742495465ac22ffc3bc583d5e27aa2975d781d3a7d51b26149236ebcce8a94ec1d615e83a568d68c57bb8b10fa7
Malware Config
Signatures
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Modifies system executable filetype association 2 TTPs 8 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\PropertySheetHandlers\{B41DB860-8EE4-11D2-9906-E49FADC173CA} uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\PropertySheetHandlers\{B41DB860-8EE4-11D2-9906-E49FADC173CA}\ uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shellex\ContextMenuHandlers\WinRAR32 uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shellex\ContextMenuHandlers\WinRAR32\ = "{B41DB860-8EE4-11D2-9906-E49FADC173CA}" uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\PropertySheetHandlers\{B41DB860-64E4-11D2-9906-E49FADC173CA} uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\PropertySheetHandlers\{B41DB860-64E4-11D2-9906-E49FADC173CA}\ uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shellex\ContextMenuHandlers\WinRAR uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shellex\ContextMenuHandlers\WinRAR\ = "{B41DB860-64E4-11D2-9906-E49FADC173CA}" uninstall.exe -
Executes dropped EXE 1 IoCs
pid Process 304 uninstall.exe -
Registers COM server for autorun 1 TTPs 3 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{B41DB860-64E4-11D2-9906-E49FADC173CA}\InProcServer32 uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{B41DB860-64E4-11D2-9906-E49FADC173CA}\InProcServer32\ = "C:\\Program Files (x86)\\WinRAR\\rarext64.dll" uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{B41DB860-64E4-11D2-9906-E49FADC173CA}\InProcServer32\ThreadingModel = "Apartment" uninstall.exe -
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Drops file in Program Files directory 42 IoCs
description ioc Process File created C:\Program Files (x86)\WinRAR\UnRAR.exe winrar600.exe File opened for modification C:\Program Files (x86)\WinRAR\Descript.ion winrar600.exe File created C:\Program Files (x86)\WinRAR\ReadMe.txt winrar600.exe File created C:\Program Files (x86)\WinRAR\RarFiles.lst winrar600.exe File opened for modification C:\Program Files (x86)\WinRAR\RarFiles.lst winrar600.exe File created C:\Program Files (x86)\WinRAR\Rar.exe winrar600.exe File opened for modification C:\Program Files (x86)\WinRAR\Rar.txt winrar600.exe File opened for modification C:\Program Files (x86)\WinRAR\7zxa.dll winrar600.exe File created C:\Program Files (x86)\WinRAR\Zip.SFX winrar600.exe File opened for modification C:\Program Files (x86)\WinRAR\RarExt64.dll winrar600.exe File opened for modification C:\Program Files (x86)\WinRAR winrar600.exe File created C:\Program Files (x86)\WinRAR\License.txt winrar600.exe File opened for modification C:\Program Files (x86)\WinRAR\License.txt winrar600.exe File created C:\Program Files (x86)\WinRAR\WhatsNew.txt winrar600.exe File opened for modification C:\Program Files (x86)\WinRAR\UnRAR.exe winrar600.exe File opened for modification C:\Program Files (x86)\WinRAR\Default.SFX winrar600.exe File created C:\Program Files (x86)\WinRAR\WinCon.SFX winrar600.exe File created C:\Program Files (x86)\WinRAR\WinRAR.chm winrar600.exe File created C:\Program Files (x86)\WinRAR\__tmp_rar_sfx_access_check_240584281 winrar600.exe File opened for modification C:\Program Files (x86)\WinRAR\WhatsNew.txt winrar600.exe File created C:\Program Files (x86)\WinRAR\Uninstall.exe winrar600.exe File opened for modification C:\Program Files (x86)\WinRAR\Uninstall.exe winrar600.exe File created C:\Program Files (x86)\WinRAR\RarExt.dll winrar600.exe File created C:\Program Files (x86)\WinRAR\Order.htm winrar600.exe File opened for modification C:\Program Files (x86)\WinRAR\Uninstall.lst winrar600.exe File created C:\Program Files (x86)\WinRAR\7zxa.dll winrar600.exe File created C:\Program Files (x86)\WinRAR\rarnew.dat uninstall.exe File created C:\Program Files (x86)\WinRAR\zipnew.dat uninstall.exe File opened for modification C:\Program Files (x86)\WinRAR\Zip.SFX winrar600.exe File created C:\Program Files (x86)\WinRAR\Rar.txt winrar600.exe File opened for modification C:\Program Files (x86)\WinRAR\Rar.exe winrar600.exe File created C:\Program Files (x86)\WinRAR\WinRAR.exe winrar600.exe File opened for modification C:\Program Files (x86)\WinRAR\RarExt.dll winrar600.exe File created C:\Program Files (x86)\WinRAR\Default.SFX winrar600.exe File opened for modification C:\Program Files (x86)\WinRAR\WinRAR.chm winrar600.exe File created C:\Program Files (x86)\WinRAR\Descript.ion winrar600.exe File created C:\Program Files (x86)\WinRAR\Uninstall.lst winrar600.exe File opened for modification C:\Program Files (x86)\WinRAR\WinRAR.exe winrar600.exe File created C:\Program Files (x86)\WinRAR\RarExt64.dll winrar600.exe File opened for modification C:\Program Files (x86)\WinRAR\WinCon.SFX winrar600.exe File opened for modification C:\Program Files (x86)\WinRAR\ReadMe.txt winrar600.exe File opened for modification C:\Program Files (x86)\WinRAR\Order.htm winrar600.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Modifies registry class 64 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.txz uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shell\open\command uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{B41DB860-8EE4-11D2-9906-E49FADC173CA}\InProcServer32\ThreadingModel = "Apartment" uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Folder\shellex\ContextMenuHandlers\WinRAR uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.r03\ = "WinRAR" uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.r11 uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.bz uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.zip\ = "WinRAR.ZIP" uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.xxe\ = "WinRAR" uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.zipx\ = "WinRAR" uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shellex\ContextMenuHandlers uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shellex\PropertySheetHandlers\{B41DB860-8EE4-11D2-9906-E49FADC173CA} uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shellex\PropertySheetHandlers\{B41DB860-8EE4-11D2-9906-E49FADC173CA} uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.r18 uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.r23 uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.REV\ = "RAR recovery volume" uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\*\shellex\ContextMenuHandlers\WinRAR32 uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.r02\ = "WinRAR" uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.uu\ = "WinRAR" uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shell\open uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\DefaultIcon\ = "C:\\Program Files (x86)\\WinRAR\\WinRAR.exe,0" uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shellex\ContextMenuHandlers\{B41DB860-8EE4-11D2-9906-E49FADC173CA}\ uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{B41DB860-64E4-11D2-9906-E49FADC173CA} uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.r14 uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.r19\ = "WinRAR" uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.r20 uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.arj uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.arj\ = "WinRAR" uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.lz uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shellex\DropHandler\ = "{B41DB860-8EE4-11D2-9906-E49FADC173CA}" uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.r11\ = "WinRAR" uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.r12 uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.r27\ = "WinRAR" uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.rar\ShellNew\FileName = "C:\\Program Files (x86)\\WinRAR\\rarnew.dat" uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.gz uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.r14\ = "WinRAR" uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.uu uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.xz uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shellex\ContextMenuHandlers\{B41DB860-64E4-11D2-9906-E49FADC173CA} uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\*\shellex\ContextMenuHandlers\WinRAR uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.lzh uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.tar uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{B41DB860-8EE4-11D2-9906-E49FADC173CA}\ = "WinRAR" uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.rar\ = "WinRAR" uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.r02 uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.r26\ = "WinRAR" uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.r10\ = "WinRAR" uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.r26 uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shell\open\command\ = "\"C:\\Program Files (x86)\\WinRAR\\WinRAR.exe\" \"%1\"" uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shellex\ContextMenuHandlers\{B41DB860-8EE4-11D2-9906-E49FADC173CA} uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shellex\ContextMenuHandlers\WinRAR32 uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shellex\ContextMenuHandlers\{B41DB860-64E4-11D2-9906-E49FADC173CA} uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR\shellex\PropertySheetHandlers\{B41DB860-64E4-11D2-9906-E49FADC173CA}\ uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Folder\shellex\DragDropHandlers\WinRAR uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shellex\ContextMenuHandlers\WinRAR uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.r25\ = "WinRAR" uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.z\ = "WinRAR" uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.001\ = "WinRAR" uninstall.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.7z uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.gz\ = "WinRAR" uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WinRAR.ZIP\shellex\DropHandler\ = "{B41DB860-8EE4-11D2-9906-E49FADC173CA}" uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.r00\ = "WinRAR" uninstall.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.r05\ = "WinRAR" uninstall.exe -
Suspicious use of SetWindowsHookEx 3 IoCs
pid Process 3036 winrar600.exe 3036 winrar600.exe 304 uninstall.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 3036 wrote to memory of 304 3036 winrar600.exe 67 PID 3036 wrote to memory of 304 3036 winrar600.exe 67 PID 3036 wrote to memory of 304 3036 winrar600.exe 67
Processes
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C:\Users\Admin\AppData\Local\Temp\winrar600.exe"C:\Users\Admin\AppData\Local\Temp\winrar600.exe"1⤵
- Drops file in Program Files directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3036 -
C:\Program Files (x86)\WinRAR\uninstall.exe"C:\Program Files (x86)\WinRAR\uninstall.exe" /setup2⤵
- Modifies system executable filetype association
- Executes dropped EXE
- Registers COM server for autorun
- Drops file in Program Files directory
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:304
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
105KB
MD5a2cebfd18b8b97fc0b18db95d9364ca1
SHA17d4fdd5d33b1098df5ec3471d8934b5d30c5da73
SHA256f3ccf2f7a7981a09b5ad75302d33cad253394fcc344edc8fdb59c2e66d405930
SHA5121f426c3863f207b24c02067361188e2630bf553d9840bc170d3633af313852a47421e43f25d87d460c366668eb7c6f60523b2b087a1a9d710d07d0a2627abd72
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Filesize
366KB
MD554ebba23af8ea3562c143b6f9a2e0bc1
SHA13dbca72735ce91059e22c41b6527a1fd74c08425
SHA256a434ef5347fa047e6eb21e0c00e689bdc88f3c715281c9c2afb0ec1a46578586
SHA5122662f189cb4b8a95d5356e89add685c606c4bbd60f189ed975e9f5c1148c7051d025741743e74eec8e67d61f36f87ff2faac417a1847a71b02cd2fc5fb7d68ef
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Filesize
82KB
MD5f9b2c17e898b62cbcdfc641282eaeddf
SHA17870d39eb4955bb7c5f0dd25f52846aa120831aa
SHA2564f78d917ef8238238495168bd780bea42063ac6097dfe4322544eee65cbb67d8
SHA5120306c0cec9c8233d694784b1512adcb936aa5c499af695adfa68efc48c39f2a2c02e9f5637e02541e13d6bb73c48400c8ca9c79affd66e8be24e1a692b81ae33
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Filesize
313KB
MD52cf1541d0f89c9b0f4c77d1c276abb2b
SHA1bc4dced7f3fcc4aa3b804ebb27c55a5eba57dc96
SHA25648f7da1a43e24e564cc8c93ce967434b5e0bb2ff6cb705b62381fde827bf3f81
SHA512a7a8093f7762ed5a928020d598490b2fa2f9fc2db61d77ab91f015ee2c112f591826e620c22510980108101dfcf86d5bfb08f54d15a9a16c3c0659d8bc66fa36
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Filesize
2.4MB
MD5fd7b28f197668c62d7ab2eb77ad2750d
SHA1d9c0ec348cf944c7f239e92e1bdb66caaf711895
SHA2561317d70682bd11e5d320af850d6ecbb5a70c200d626ec7bf69c47566894db515
SHA51249017ed6caa0ccd00834bca3cd96ef42fc9923e2b6232841680d44e3cb6907dc5cc3c3a8c2aaff8239230755c5dab43a9f9003347cb274d7ff5f0ed06c0c8e61
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Filesize
366KB
MD554ebba23af8ea3562c143b6f9a2e0bc1
SHA13dbca72735ce91059e22c41b6527a1fd74c08425
SHA256a434ef5347fa047e6eb21e0c00e689bdc88f3c715281c9c2afb0ec1a46578586
SHA5122662f189cb4b8a95d5356e89add685c606c4bbd60f189ed975e9f5c1148c7051d025741743e74eec8e67d61f36f87ff2faac417a1847a71b02cd2fc5fb7d68ef