Analysis
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max time kernel
30s -
max time network
42s -
platform
windows7_x64 -
resource
win7v20210408 -
submitted
06-09-2021 06:44
Static task
static1
Behavioral task
behavioral1
Sample
1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe
Resource
win7v20210408
Behavioral task
behavioral2
Sample
1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe
Resource
win10v20210408
General
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Target
1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe
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Size
610KB
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MD5
deb8f4311fd52319f6168c10b626c808
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SHA1
f4807d71a1048d05815a09b74997f338e26ba9ff
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SHA256
1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053
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SHA512
ecb2c2630b03a07f20e993722ef9f55f5369d11afa21bec3dab59f65867849fb3596e4d3707730d2d75acd5d62e98afb1c06f2e7a80cd4f5946b51867bed9685
Malware Config
Extracted
C:\Users\Admin\Desktop\README.txt
RansHelp@tutanota.com
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 2 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Roaming\svchost.exe family_chaos C:\Users\Admin\AppData\Roaming\svchost.exe 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 1924 bcdedit.exe 1108 bcdedit.exe -
Processes:
wbadmin.exepid process 1060 wbadmin.exe -
Executes dropped EXE 1 IoCs
Processes:
svchost.exepid process 1624 svchost.exe -
Modifies extensions of user files 4 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
svchost.exedescription ioc process File renamed C:\Users\Admin\Pictures\RestoreGrant.raw => C:\Users\Admin\Pictures\RestoreGrant.raw.CRYPTEDPAY svchost.exe File renamed C:\Users\Admin\Pictures\SubmitCheckpoint.raw => C:\Users\Admin\Pictures\SubmitCheckpoint.raw.CRYPTEDPAY svchost.exe File renamed C:\Users\Admin\Pictures\ConvertToUnregister.raw => C:\Users\Admin\Pictures\ConvertToUnregister.raw.CRYPTEDPAY svchost.exe File renamed C:\Users\Admin\Pictures\DisableApprove.tif => C:\Users\Admin\Pictures\DisableApprove.tif.CRYPTEDPAY svchost.exe -
Drops startup file 3 IoCs
Processes:
svchost.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini svchost.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\README.txt svchost.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:
svchost.exedescription ioc process File opened for modification C:\Users\Admin\Saved Games\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\Sample Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\Sample Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\Sample Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links for United States\desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
Processes:
svchost.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\54uazd6z4.jpg" svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
Processes:
vssadmin.exepid process 824 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
Processes:
NOTEPAD.EXEpid process 1672 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
Processes:
svchost.exepid process 1624 svchost.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exesvchost.exepid process 2032 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe 2032 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe 1624 svchost.exe 1624 svchost.exe -
Suspicious use of AdjustPrivilegeToken 45 IoCs
Processes:
1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exesvchost.exevssvc.exeWMIC.exedescription pid process Token: SeDebugPrivilege 2032 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe Token: SeDebugPrivilege 1624 svchost.exe Token: SeBackupPrivilege 1772 vssvc.exe Token: SeRestorePrivilege 1772 vssvc.exe Token: SeAuditPrivilege 1772 vssvc.exe Token: SeIncreaseQuotaPrivilege 1392 WMIC.exe Token: SeSecurityPrivilege 1392 WMIC.exe Token: SeTakeOwnershipPrivilege 1392 WMIC.exe Token: SeLoadDriverPrivilege 1392 WMIC.exe Token: SeSystemProfilePrivilege 1392 WMIC.exe Token: SeSystemtimePrivilege 1392 WMIC.exe Token: SeProfSingleProcessPrivilege 1392 WMIC.exe Token: SeIncBasePriorityPrivilege 1392 WMIC.exe Token: SeCreatePagefilePrivilege 1392 WMIC.exe Token: SeBackupPrivilege 1392 WMIC.exe Token: SeRestorePrivilege 1392 WMIC.exe Token: SeShutdownPrivilege 1392 WMIC.exe Token: SeDebugPrivilege 1392 WMIC.exe Token: SeSystemEnvironmentPrivilege 1392 WMIC.exe Token: SeRemoteShutdownPrivilege 1392 WMIC.exe Token: SeUndockPrivilege 1392 WMIC.exe Token: SeManageVolumePrivilege 1392 WMIC.exe Token: 33 1392 WMIC.exe Token: 34 1392 WMIC.exe Token: 35 1392 WMIC.exe Token: SeIncreaseQuotaPrivilege 1392 WMIC.exe Token: SeSecurityPrivilege 1392 WMIC.exe Token: SeTakeOwnershipPrivilege 1392 WMIC.exe Token: SeLoadDriverPrivilege 1392 WMIC.exe Token: SeSystemProfilePrivilege 1392 WMIC.exe Token: SeSystemtimePrivilege 1392 WMIC.exe Token: SeProfSingleProcessPrivilege 1392 WMIC.exe Token: SeIncBasePriorityPrivilege 1392 WMIC.exe Token: SeCreatePagefilePrivilege 1392 WMIC.exe Token: SeBackupPrivilege 1392 WMIC.exe Token: SeRestorePrivilege 1392 WMIC.exe Token: SeShutdownPrivilege 1392 WMIC.exe Token: SeDebugPrivilege 1392 WMIC.exe Token: SeSystemEnvironmentPrivilege 1392 WMIC.exe Token: SeRemoteShutdownPrivilege 1392 WMIC.exe Token: SeUndockPrivilege 1392 WMIC.exe Token: SeManageVolumePrivilege 1392 WMIC.exe Token: 33 1392 WMIC.exe Token: 34 1392 WMIC.exe Token: 35 1392 WMIC.exe -
Suspicious use of WriteProcessMemory 30 IoCs
Processes:
1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exesvchost.execmd.execmd.execmd.exedescription pid process target process PID 2032 wrote to memory of 1624 2032 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe svchost.exe PID 2032 wrote to memory of 1624 2032 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe svchost.exe PID 2032 wrote to memory of 1624 2032 1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe svchost.exe PID 1624 wrote to memory of 292 1624 svchost.exe cmd.exe PID 1624 wrote to memory of 292 1624 svchost.exe cmd.exe PID 1624 wrote to memory of 292 1624 svchost.exe cmd.exe PID 292 wrote to memory of 824 292 cmd.exe vssadmin.exe PID 292 wrote to memory of 824 292 cmd.exe vssadmin.exe PID 292 wrote to memory of 824 292 cmd.exe vssadmin.exe PID 292 wrote to memory of 1392 292 cmd.exe WMIC.exe PID 292 wrote to memory of 1392 292 cmd.exe WMIC.exe PID 292 wrote to memory of 1392 292 cmd.exe WMIC.exe PID 1624 wrote to memory of 1728 1624 svchost.exe cmd.exe PID 1624 wrote to memory of 1728 1624 svchost.exe cmd.exe PID 1624 wrote to memory of 1728 1624 svchost.exe cmd.exe PID 1728 wrote to memory of 1924 1728 cmd.exe bcdedit.exe PID 1728 wrote to memory of 1924 1728 cmd.exe bcdedit.exe PID 1728 wrote to memory of 1924 1728 cmd.exe bcdedit.exe PID 1728 wrote to memory of 1108 1728 cmd.exe bcdedit.exe PID 1728 wrote to memory of 1108 1728 cmd.exe bcdedit.exe PID 1728 wrote to memory of 1108 1728 cmd.exe bcdedit.exe PID 1624 wrote to memory of 1128 1624 svchost.exe cmd.exe PID 1624 wrote to memory of 1128 1624 svchost.exe cmd.exe PID 1624 wrote to memory of 1128 1624 svchost.exe cmd.exe PID 1128 wrote to memory of 1060 1128 cmd.exe wbadmin.exe PID 1128 wrote to memory of 1060 1128 cmd.exe wbadmin.exe PID 1128 wrote to memory of 1060 1128 cmd.exe wbadmin.exe PID 1624 wrote to memory of 1672 1624 svchost.exe NOTEPAD.EXE PID 1624 wrote to memory of 1672 1624 svchost.exe NOTEPAD.EXE PID 1624 wrote to memory of 1672 1624 svchost.exe NOTEPAD.EXE
Processes
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C:\Users\Admin\AppData\Local\Temp\1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe"C:\Users\Admin\AppData\Local\Temp\1ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"2⤵
- Executes dropped EXE
- Modifies extensions of user files
- Drops startup file
- Drops desktop.ini file(s)
- Sets desktop wallpaper using registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
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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
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C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\README.txt3⤵
- Opens file in notepad (likely ransom note)
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Roaming\README.txtMD5
335d5c912d55923bd52152e68513e1f9
SHA1462d753225ec89e1d08749b2060f86a81cb252a5
SHA256bc4deb41c898692c1b857f029f341b3c3e743bc7a611a9d494d7d2bf89dfea4a
SHA512fc7836bb80285d2ac50e7fee88033474b47041cf46d3310c9b312c806b2f7f59e49c1d220a55330188142ae5ed156e25213cd3e37957df172672b78acdd16a10
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C:\Users\Admin\AppData\Roaming\svchost.exeMD5
deb8f4311fd52319f6168c10b626c808
SHA1f4807d71a1048d05815a09b74997f338e26ba9ff
SHA2561ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053
SHA512ecb2c2630b03a07f20e993722ef9f55f5369d11afa21bec3dab59f65867849fb3596e4d3707730d2d75acd5d62e98afb1c06f2e7a80cd4f5946b51867bed9685
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C:\Users\Admin\AppData\Roaming\svchost.exeMD5
deb8f4311fd52319f6168c10b626c808
SHA1f4807d71a1048d05815a09b74997f338e26ba9ff
SHA2561ba5ab55b7212ba92a9402677e30e45f12d98a98f78cdcf5864a67d6c264d053
SHA512ecb2c2630b03a07f20e993722ef9f55f5369d11afa21bec3dab59f65867849fb3596e4d3707730d2d75acd5d62e98afb1c06f2e7a80cd4f5946b51867bed9685
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memory/292-68-0x0000000000000000-mapping.dmp
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memory/824-69-0x0000000000000000-mapping.dmp
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memory/1060-76-0x000007FEFB891000-0x000007FEFB893000-memory.dmpFilesize
8KB
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memory/1060-75-0x0000000000000000-mapping.dmp
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memory/1108-73-0x0000000000000000-mapping.dmp
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memory/1128-74-0x0000000000000000-mapping.dmp
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memory/1392-70-0x0000000000000000-mapping.dmp
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memory/1624-67-0x000000001AFA0000-0x000000001AFA2000-memory.dmpFilesize
8KB
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memory/1624-65-0x0000000000170000-0x0000000000171000-memory.dmpFilesize
4KB
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memory/1624-62-0x0000000000000000-mapping.dmp
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memory/1672-77-0x0000000000000000-mapping.dmp
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memory/1728-71-0x0000000000000000-mapping.dmp
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memory/1924-72-0x0000000000000000-mapping.dmp
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memory/2032-60-0x00000000009E0000-0x00000000009E1000-memory.dmpFilesize
4KB