Analysis
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max time kernel
4265012s -
max time network
63s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220112 -
submitted
17-01-2022 15:57
Static task
static1
Behavioral task
behavioral1
Sample
AZ(DANGEROUS).exe
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
AZ(DANGEROUS).exe
Resource
win10v2004-en-20220112
General
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Target
AZ(DANGEROUS).exe
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Size
549KB
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MD5
b3858953d8c79049f6a46b254e6eab6b
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SHA1
e4407979997b5e1000abaac3a75545e82e8a15b9
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SHA256
6a3e60f725d30ab2660c6c9e6928bafe273583e3e501097934e873593a13aee6
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SHA512
6c37402f8b3d76320b5b1db246a3376919ac77e48f1f66d666c5c904519e644daf992e7917632e072cd4b7df91cc42fc0a9cdae84892d9125dbbcbaea6f1169f
Malware Config
Extracted
C:\Users\Admin\Desktop\README.txt
https://computernewb.com/wiki/CollabVM
http://gg.gg/NOU2022
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 6 IoCs
Processes:
resource yara_rule behavioral2/memory/2100-130-0x0000000000970000-0x00000000009FE000-memory.dmp family_chaos behavioral2/memory/2100-131-0x0000000000970000-0x00000000009FE000-memory.dmp family_chaos C:\Users\Admin\AppData\Roaming\explorer.exe family_chaos C:\Users\Admin\AppData\Roaming\explorer.exe family_chaos behavioral2/memory/3496-135-0x0000000000480000-0x000000000050E000-memory.dmp family_chaos behavioral2/memory/3496-136-0x0000000000480000-0x000000000050E000-memory.dmp family_chaos -
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
Processes:
bcdedit.exebcdedit.exepid process 3104 bcdedit.exe 1780 bcdedit.exe -
Processes:
wbadmin.exepid process 1312 wbadmin.exe -
Executes dropped EXE 1 IoCs
Processes:
explorer.exepid process 3496 explorer.exe -
Modifies extensions of user files 3 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
explorer.exedescription ioc process File renamed C:\Users\Admin\Pictures\JoinSave.png => C:\Users\Admin\Pictures\JoinSave.png.AZ explorer.exe File renamed C:\Users\Admin\Pictures\ProtectExit.png => C:\Users\Admin\Pictures\ProtectExit.png.AZ explorer.exe File renamed C:\Users\Admin\Pictures\CompleteRename.png => C:\Users\Admin\Pictures\CompleteRename.png.AZ explorer.exe -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
AZ(DANGEROUS).exeexplorer.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation AZ(DANGEROUS).exe Key value queried \REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation explorer.exe -
Drops startup file 3 IoCs
Processes:
explorer.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\README.txt explorer.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\explorer.url explorer.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini explorer.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Drops desktop.ini file(s) 33 IoCs
Processes:
explorer.exedescription ioc process File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini explorer.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini explorer.exe File opened for modification C:\Users\Admin\Pictures\Saved Pictures\desktop.ini explorer.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini explorer.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini explorer.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\desktop.ini explorer.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini explorer.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini explorer.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini explorer.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini explorer.exe File opened for modification C:\Users\Admin\Links\desktop.ini explorer.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini explorer.exe File opened for modification C:\Users\Public\Documents\desktop.ini explorer.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini explorer.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\desktop.ini explorer.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini explorer.exe File opened for modification C:\Users\Public\Desktop\desktop.ini explorer.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini explorer.exe File opened for modification C:\Users\Admin\Music\desktop.ini explorer.exe File opened for modification C:\Users\Admin\Videos\desktop.ini explorer.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini explorer.exe File opened for modification C:\Users\Public\Pictures\desktop.ini explorer.exe File opened for modification C:\Users\Admin\Pictures\Camera Roll\desktop.ini explorer.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini explorer.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini explorer.exe File opened for modification C:\Users\Public\Videos\desktop.ini explorer.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\System Tools\Desktop.ini explorer.exe File opened for modification C:\Users\Public\Music\desktop.ini explorer.exe File opened for modification C:\Users\Admin\Documents\desktop.ini explorer.exe File opened for modification C:\Users\Admin\OneDrive\desktop.ini explorer.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini explorer.exe File opened for modification C:\Users\Admin\Searches\desktop.ini explorer.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini explorer.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
Processes:
explorer.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\r5xqczzze.jpg" explorer.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks SCSI registry key(s) 3 TTPs 4 IoCs
SCSI information is often read in order to detect sandboxing environments.
Processes:
vds.exedescription ioc process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\DISK&VEN_DADY&PROD_HARDDISK\4&215468A5&0&000000 vds.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName vds.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CDROM&VEN_DADY&PROD_DADY_DVD-ROM\4&215468A5&0&010000 vds.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_DVD-ROM\4&215468a5&0&010000\FriendlyName vds.exe -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
MusNotification.exedescription ioc process Key opened \Registry\Machine\HARDWARE\DESCRIPTION\System\CentralProcessor\0 MusNotification.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz MusNotification.exe -
Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
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Modifies registry class 1 IoCs
Processes:
explorer.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000_Classes\Local Settings explorer.exe -
Opens file in notepad (likely ransom note) 1 IoCs
Processes:
NOTEPAD.EXEpid process 2688 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
Processes:
explorer.exepid process 3496 explorer.exe -
Suspicious behavior: EnumeratesProcesses 37 IoCs
Processes:
AZ(DANGEROUS).exeexplorer.exepid process 2100 AZ(DANGEROUS).exe 2100 AZ(DANGEROUS).exe 2100 AZ(DANGEROUS).exe 2100 AZ(DANGEROUS).exe 2100 AZ(DANGEROUS).exe 2100 AZ(DANGEROUS).exe 2100 AZ(DANGEROUS).exe 2100 AZ(DANGEROUS).exe 2100 AZ(DANGEROUS).exe 2100 AZ(DANGEROUS).exe 2100 AZ(DANGEROUS).exe 2100 AZ(DANGEROUS).exe 2100 AZ(DANGEROUS).exe 2100 AZ(DANGEROUS).exe 2100 AZ(DANGEROUS).exe 2100 AZ(DANGEROUS).exe 2100 AZ(DANGEROUS).exe 2100 AZ(DANGEROUS).exe 2100 AZ(DANGEROUS).exe 3496 explorer.exe 3496 explorer.exe 3496 explorer.exe 3496 explorer.exe 3496 explorer.exe 3496 explorer.exe 3496 explorer.exe 3496 explorer.exe 3496 explorer.exe 3496 explorer.exe 3496 explorer.exe 3496 explorer.exe 3496 explorer.exe 3496 explorer.exe 3496 explorer.exe 3496 explorer.exe 3496 explorer.exe 3496 explorer.exe -
Suspicious use of AdjustPrivilegeToken 52 IoCs
Processes:
AZ(DANGEROUS).exeMusNotification.exeexplorer.exevssvc.exeWMIC.exewbengine.exedescription pid process Token: SeDebugPrivilege 2100 AZ(DANGEROUS).exe Token: SeShutdownPrivilege 2176 MusNotification.exe Token: SeCreatePagefilePrivilege 2176 MusNotification.exe Token: SeDebugPrivilege 3496 explorer.exe Token: SeBackupPrivilege 2368 vssvc.exe Token: SeRestorePrivilege 2368 vssvc.exe Token: SeAuditPrivilege 2368 vssvc.exe Token: SeIncreaseQuotaPrivilege 3900 WMIC.exe Token: SeSecurityPrivilege 3900 WMIC.exe Token: SeTakeOwnershipPrivilege 3900 WMIC.exe Token: SeLoadDriverPrivilege 3900 WMIC.exe Token: SeSystemProfilePrivilege 3900 WMIC.exe Token: SeSystemtimePrivilege 3900 WMIC.exe Token: SeProfSingleProcessPrivilege 3900 WMIC.exe Token: SeIncBasePriorityPrivilege 3900 WMIC.exe Token: SeCreatePagefilePrivilege 3900 WMIC.exe Token: SeBackupPrivilege 3900 WMIC.exe Token: SeRestorePrivilege 3900 WMIC.exe Token: SeShutdownPrivilege 3900 WMIC.exe Token: SeDebugPrivilege 3900 WMIC.exe Token: SeSystemEnvironmentPrivilege 3900 WMIC.exe Token: SeRemoteShutdownPrivilege 3900 WMIC.exe Token: SeUndockPrivilege 3900 WMIC.exe Token: SeManageVolumePrivilege 3900 WMIC.exe Token: 33 3900 WMIC.exe Token: 34 3900 WMIC.exe Token: 35 3900 WMIC.exe Token: 36 3900 WMIC.exe Token: SeIncreaseQuotaPrivilege 3900 WMIC.exe Token: SeSecurityPrivilege 3900 WMIC.exe Token: SeTakeOwnershipPrivilege 3900 WMIC.exe Token: SeLoadDriverPrivilege 3900 WMIC.exe Token: SeSystemProfilePrivilege 3900 WMIC.exe Token: SeSystemtimePrivilege 3900 WMIC.exe Token: SeProfSingleProcessPrivilege 3900 WMIC.exe Token: SeIncBasePriorityPrivilege 3900 WMIC.exe Token: SeCreatePagefilePrivilege 3900 WMIC.exe Token: SeBackupPrivilege 3900 WMIC.exe Token: SeRestorePrivilege 3900 WMIC.exe Token: SeShutdownPrivilege 3900 WMIC.exe Token: SeDebugPrivilege 3900 WMIC.exe Token: SeSystemEnvironmentPrivilege 3900 WMIC.exe Token: SeRemoteShutdownPrivilege 3900 WMIC.exe Token: SeUndockPrivilege 3900 WMIC.exe Token: SeManageVolumePrivilege 3900 WMIC.exe Token: 33 3900 WMIC.exe Token: 34 3900 WMIC.exe Token: 35 3900 WMIC.exe Token: 36 3900 WMIC.exe Token: SeBackupPrivilege 1240 wbengine.exe Token: SeRestorePrivilege 1240 wbengine.exe Token: SeSecurityPrivilege 1240 wbengine.exe -
Suspicious use of WriteProcessMemory 20 IoCs
Processes:
AZ(DANGEROUS).exeexplorer.execmd.execmd.execmd.exedescription pid process target process PID 2100 wrote to memory of 3496 2100 AZ(DANGEROUS).exe explorer.exe PID 2100 wrote to memory of 3496 2100 AZ(DANGEROUS).exe explorer.exe PID 3496 wrote to memory of 2928 3496 explorer.exe cmd.exe PID 3496 wrote to memory of 2928 3496 explorer.exe cmd.exe PID 2928 wrote to memory of 8 2928 cmd.exe vssadmin.exe PID 2928 wrote to memory of 8 2928 cmd.exe vssadmin.exe PID 2928 wrote to memory of 3900 2928 cmd.exe WMIC.exe PID 2928 wrote to memory of 3900 2928 cmd.exe WMIC.exe PID 3496 wrote to memory of 2400 3496 explorer.exe cmd.exe PID 3496 wrote to memory of 2400 3496 explorer.exe cmd.exe PID 2400 wrote to memory of 3104 2400 cmd.exe bcdedit.exe PID 2400 wrote to memory of 3104 2400 cmd.exe bcdedit.exe PID 2400 wrote to memory of 1780 2400 cmd.exe bcdedit.exe PID 2400 wrote to memory of 1780 2400 cmd.exe bcdedit.exe PID 3496 wrote to memory of 1316 3496 explorer.exe cmd.exe PID 3496 wrote to memory of 1316 3496 explorer.exe cmd.exe PID 1316 wrote to memory of 1312 1316 cmd.exe wbadmin.exe PID 1316 wrote to memory of 1312 1316 cmd.exe wbadmin.exe PID 3496 wrote to memory of 2688 3496 explorer.exe NOTEPAD.EXE PID 3496 wrote to memory of 2688 3496 explorer.exe NOTEPAD.EXE
Processes
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C:\Users\Admin\AppData\Local\Temp\AZ(DANGEROUS).exe"C:\Users\Admin\AppData\Local\Temp\AZ(DANGEROUS).exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2100 -
C:\Users\Admin\AppData\Roaming\explorer.exe"C:\Users\Admin\AppData\Roaming\explorer.exe"2⤵
- Executes dropped EXE
- Modifies extensions of user files
- Checks computer location settings
- Drops startup file
- Drops desktop.ini file(s)
- Sets desktop wallpaper using registry
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3496 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:2928 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:8 -
C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:3900 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no3⤵
- Suspicious use of WriteProcessMemory
PID:2400 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:3104 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:1780 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:1316 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:1312 -
C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\README.txt3⤵
- Opens file in notepad (likely ransom note)
PID:2688
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C:\Windows\system32\MusNotification.exeC:\Windows\system32\MusNotification.exe1⤵
- Checks processor information in registry
- Suspicious use of AdjustPrivilegeToken
PID:2176
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2368
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1240
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:952
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:3972
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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MD5
1adb4439f341f75c54015bdd200e53de
SHA16b92c52e2aec7bbf03fc2cce81ea175847adbac3
SHA2564f90e6e474879eb0f650173320c15889a3b7b133656d476f20c792a453316340
SHA51211d91223ddd363425d872032ce40b16e00b2223b81b6e5e7d6a70161ee60fa415808a315d2927adc4b546ee6069e72cc315381b97d7b41ec5fcf70e8c39b94df
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MD5
b3858953d8c79049f6a46b254e6eab6b
SHA1e4407979997b5e1000abaac3a75545e82e8a15b9
SHA2566a3e60f725d30ab2660c6c9e6928bafe273583e3e501097934e873593a13aee6
SHA5126c37402f8b3d76320b5b1db246a3376919ac77e48f1f66d666c5c904519e644daf992e7917632e072cd4b7df91cc42fc0a9cdae84892d9125dbbcbaea6f1169f
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MD5
b3858953d8c79049f6a46b254e6eab6b
SHA1e4407979997b5e1000abaac3a75545e82e8a15b9
SHA2566a3e60f725d30ab2660c6c9e6928bafe273583e3e501097934e873593a13aee6
SHA5126c37402f8b3d76320b5b1db246a3376919ac77e48f1f66d666c5c904519e644daf992e7917632e072cd4b7df91cc42fc0a9cdae84892d9125dbbcbaea6f1169f