Analysis
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max time kernel
180s -
max time network
195s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system -
submitted
06-12-2022 00:14
Static task
static1
Behavioral task
behavioral1
Sample
winrar-x64-611.exe
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
winrar-x64-611.exe
Resource
win10v2004-20221111-en
General
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Target
winrar-x64-611.exe
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Size
3.3MB
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MD5
8a6217d94e1bcbabdd1dfcdcaa83d1b3
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SHA1
99b81b01f277540f38ea3e96c9c6dc2a57dfeb92
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SHA256
3023edb4fc3f7c2ebad157b182b62848423f6fa20d180b0df689cbb503a49684
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SHA512
a8f6f6fdfa9d754a577b7dd885a938fb9149f113baa2afb6352df622cdb73242175a06cd567e971fd3de93a126ba05b78178d5d512720d8fdb87ececce2cbf54
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SSDEEP
98304:mZjOBfKqY3fhMBexKTvsCHBviBh2GB8y0mb5:mZZ7fhMB2ovFNiKGhJ
Malware Config
Extracted
C:\Program Files\WinRAR\Rar.txt
Extracted
C:\Program Files\WinRAR\WhatsNew.txt
https
http
http://weirdsgn.com
http://icondesignlab.com
https://rarlab.com/themes/WinRAR_Classic_48x36.theme.rar
Signatures
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Executes dropped EXE 1 IoCs
Processes:
uninstall.exepid process 4024 uninstall.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
winrar-x64-611.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation winrar-x64-611.exe -
Drops file in Program Files directory 58 IoCs
Processes:
winrar-x64-611.exedescription ioc process File created C:\Program Files\WinRAR\Descript.ion winrar-x64-611.exe File created C:\Program Files\WinRAR\Zip64.SFX winrar-x64-611.exe File created C:\Program Files\WinRAR\RarExtLogo.altform-unplated_targetsize-48.png winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\ReadMe.txt winrar-x64-611.exe File created C:\Program Files\WinRAR\Order.htm winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\WinCon.SFX winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\Uninstall.lst winrar-x64-611.exe File created C:\Program Files\WinRAR\Uninstall.exe winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\WinRAR.exe winrar-x64-611.exe File created C:\Program Files\WinRAR\Zip.SFX winrar-x64-611.exe File created C:\Program Files\WinRAR\WinRAR.exe winrar-x64-611.exe File created C:\Program Files\WinRAR\RarExt32.dll winrar-x64-611.exe File created C:\Program Files\WinRAR\Default64.SFX winrar-x64-611.exe File created C:\Program Files\WinRAR\License.txt winrar-x64-611.exe File created C:\Program Files\WinRAR\Rar.txt winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\Uninstall.exe winrar-x64-611.exe File created C:\Program Files\WinRAR\UnRAR.exe winrar-x64-611.exe File created C:\Program Files\WinRAR\WinCon64.SFX winrar-x64-611.exe File created C:\Program Files\WinRAR\WinRAR.chm winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\WinRAR.chm winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\RarExt32.dll winrar-x64-611.exe File created C:\Program Files\WinRAR\RarExtPackage.msix winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\Zip.SFX winrar-x64-611.exe File created C:\Program Files\WinRAR\RarExtLogo.altform-unplated_targetsize-64.png winrar-x64-611.exe File created C:\Program Files\WinRAR\__tmp_rar_sfx_access_check_240677875 winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\Rar.txt winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\UnRAR.exe winrar-x64-611.exe File created C:\Program Files\WinRAR\7zxa.dll winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\RarFiles.lst winrar-x64-611.exe File created C:\Program Files\WinRAR\RarExtInstaller.exe winrar-x64-611.exe File created C:\Program Files\WinRAR\RarExt.dll winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\RarExt.dll winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\Resources.pri winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\RarExtLogo.altform-unplated_targetsize-32.png winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\RarExtLogo.altform-unplated_targetsize-64.png winrar-x64-611.exe File created C:\Program Files\WinRAR\WhatsNew.txt winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\WhatsNew.txt winrar-x64-611.exe File created C:\Program Files\WinRAR\Uninstall.lst winrar-x64-611.exe File created C:\Program Files\WinRAR\ReadMe.txt winrar-x64-611.exe File created C:\Program Files\WinRAR\Resources.pri winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\Default.SFX winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\Default64.SFX winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR winrar-x64-611.exe File created C:\Program Files\WinRAR\RarFiles.lst winrar-x64-611.exe File created C:\Program Files\WinRAR\WinCon.SFX winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\WinCon64.SFX winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\RarExtLogo.altform-unplated_targetsize-48.png winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\Descript.ion winrar-x64-611.exe File created C:\Program Files\WinRAR\Rar.exe winrar-x64-611.exe File created C:\Program Files\WinRAR\Default.SFX winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\License.txt winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\RarExtInstaller.exe winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\7zxa.dll winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\RarExtPackage.msix winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\Zip64.SFX winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\Order.htm winrar-x64-611.exe File opened for modification C:\Program Files\WinRAR\Rar.exe winrar-x64-611.exe File created C:\Program Files\WinRAR\RarExtLogo.altform-unplated_targetsize-32.png winrar-x64-611.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious use of SetWindowsHookEx 3 IoCs
Processes:
winrar-x64-611.exeuninstall.exepid process 4304 winrar-x64-611.exe 4304 winrar-x64-611.exe 4024 uninstall.exe -
Suspicious use of WriteProcessMemory 2 IoCs
Processes:
winrar-x64-611.exedescription pid process target process PID 4304 wrote to memory of 4024 4304 winrar-x64-611.exe uninstall.exe PID 4304 wrote to memory of 4024 4304 winrar-x64-611.exe uninstall.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\winrar-x64-611.exe"C:\Users\Admin\AppData\Local\Temp\winrar-x64-611.exe"1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4304 -
C:\Program Files\WinRAR\uninstall.exe"C:\Program Files\WinRAR\uninstall.exe" /setup2⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:4024
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
412KB
MD592667e28583a9489e3cf4f1a7fd6636e
SHA1faa09990ba4daae970038ed44e3841151d6e7f28
SHA2569147293554ad43920bcf763ffd6e1183c36b9f8156dc220548426a187a5f2959
SHA51263555a15f153df59b2ca2ab56cd20d71420eb5c9977bcf774723d8484157172b027f71fb2f7a4692aecc6e471f50beec2e0f7a43e57449714caede1e9684c0b8
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Filesize
412KB
MD592667e28583a9489e3cf4f1a7fd6636e
SHA1faa09990ba4daae970038ed44e3841151d6e7f28
SHA2569147293554ad43920bcf763ffd6e1183c36b9f8156dc220548426a187a5f2959
SHA51263555a15f153df59b2ca2ab56cd20d71420eb5c9977bcf774723d8484157172b027f71fb2f7a4692aecc6e471f50beec2e0f7a43e57449714caede1e9684c0b8