Analysis
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max time kernel
10s -
max time network
13s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
23-10-2022 07:48
Static task
static1
Behavioral task
behavioral1
Sample
885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906.exe
Resource
win10v2004-20220901-en
General
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Target
885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906.exe
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Size
424KB
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MD5
823ece0c42f0a1527a81efe1cff9591a
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SHA1
dc0fc3de6b66447a632d1055fe58d59e2f3c0099
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SHA256
885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906
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SHA512
c651c4641f9edc780b9eee94342eeafb0d074cbe3a196660c9c55e7ba54c653dfe6e9112e329ff6d1361cd43939725ae5d0b708042d28e51c1c99151af45a360
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SSDEEP
6144:BJOrslDNrfqw5W9RtPLal1tBzAF2Rg/zUZjpMWMl4ZC824UzHoXbftChXW3AxfuJ:BJOrSNr4S77zAJzUZ1azKblCJxfS6
Malware Config
Extracted
C:\$Recycle.Bin\S-1-5-21-929662420-1054238289-2961194603-1000\_RECoVERY_+ytcth.txt
teslacrypt
http://pts764gt354fder34fsqw45gdfsavadfgsfg.kraskula.com/445EF8D5A976D5C
http://sondr5344ygfweyjbfkw4fhsefv.heliofetch.at/445EF8D5A976D5C
http://uiredn4njfsa4234bafb32ygjdawfvs.frascuft.com/445EF8D5A976D5C
http://xlowfznrg4wf7dli.ONION/445EF8D5A976D5C
Signatures
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TeslaCrypt, AlphaCrypt
Ransomware based on CryptoLocker. Shut down by the developers in 2016.
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Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Executes dropped EXE 1 IoCs
Processes:
rviejkpjudmk.exepid process 204 rviejkpjudmk.exe -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906.exerviejkpjudmk.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation 885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906.exe Key value queried \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation rviejkpjudmk.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
rviejkpjudmk.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run rviejkpjudmk.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nbhrxidyyxtn = "C:\\Windows\\system32\\cmd.exe /c start \"\" \"C:\\Windows\\rviejkpjudmk.exe\"" rviejkpjudmk.exe -
Drops file in Program Files directory 64 IoCs
Processes:
rviejkpjudmk.exedescription ioc process File opened for modification C:\Program Files\Common Files\microsoft shared\Stationery\_RECoVERY_+ytcth.html rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\Triedit\en-US\_RECoVERY_+ytcth.html rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\VSTO\_RECoVERY_+ytcth.png rviejkpjudmk.exe File opened for modification C:\Program Files\7-Zip\Lang\be.txt rviejkpjudmk.exe File opened for modification C:\Program Files\7-Zip\Lang\mr.txt rviejkpjudmk.exe File opened for modification C:\Program Files\7-Zip\Lang\si.txt rviejkpjudmk.exe File opened for modification C:\Program Files\7-Zip\_RECoVERY_+ytcth.txt rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\sr-Latn-RS\_RECoVERY_+ytcth.png rviejkpjudmk.exe File opened for modification C:\Program Files\7-Zip\Lang\sq.txt rviejkpjudmk.exe File opened for modification C:\Program Files\7-Zip\Lang\sr-spc.txt rviejkpjudmk.exe File opened for modification C:\Program Files\7-Zip\Lang\uz.txt rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\zh-CN\_RECoVERY_+ytcth.png rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\oskclearui\_RECoVERY_+ytcth.html rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\sr-Latn-RS\_RECoVERY_+ytcth.html rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\zh-TW\_RECoVERY_+ytcth.html rviejkpjudmk.exe File opened for modification C:\Program Files\7-Zip\Lang\ka.txt rviejkpjudmk.exe File opened for modification C:\Program Files\7-Zip\Lang\kab.txt rviejkpjudmk.exe File opened for modification C:\Program Files\7-Zip\Lang\sl.txt rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\cs-CZ\_RECoVERY_+ytcth.html rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\auxpad\_RECoVERY_+ytcth.png rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\ja-JP\_RECoVERY_+ytcth.png rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\zh-CN\_RECoVERY_+ytcth.html rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\_RECoVERY_+ytcth.html rviejkpjudmk.exe File opened for modification C:\Program Files\7-Zip\Lang\hi.txt rviejkpjudmk.exe File opened for modification C:\Program Files\7-Zip\Lang\kk.txt rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\auxpad\_RECoVERY_+ytcth.html rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\he-IL\_RECoVERY_+ytcth.png rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\it-IT\_RECoVERY_+ytcth.png rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\MSInfo\_RECoVERY_+ytcth.txt rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\insert\_RECoVERY_+ytcth.png rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\main\_RECoVERY_+ytcth.png rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\_RECoVERY_+ytcth.html rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\_RECoVERY_+ytcth.png rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\_RECoVERY_+ytcth.html rviejkpjudmk.exe File opened for modification C:\Program Files\7-Zip\Lang\da.txt rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\hr-HR\_RECoVERY_+ytcth.png rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\MSInfo\en-US\_RECoVERY_+ytcth.png rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\TextConv\_RECoVERY_+ytcth.txt rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\fr-FR\_RECoVERY_+ytcth.png rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\oskpred\_RECoVERY_+ytcth.html rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\System\ado\_RECoVERY_+ytcth.html rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\OfficeSoftwareProtectionPlatform\_RECoVERY_+ytcth.html rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\VSTO\10.0\_RECoVERY_+ytcth.png rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\VSTO\10.0\_RECoVERY_+ytcth.html rviejkpjudmk.exe File opened for modification C:\Program Files\7-Zip\Lang\de.txt rviejkpjudmk.exe File opened for modification C:\Program Files\7-Zip\Lang\el.txt rviejkpjudmk.exe File opened for modification C:\Program Files\7-Zip\Lang\fi.txt rviejkpjudmk.exe File opened for modification C:\Program Files\7-Zip\Lang\sv.txt rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\symbols\_RECoVERY_+ytcth.html rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\hr-HR\_RECoVERY_+ytcth.html rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\pt-BR\_RECoVERY_+ytcth.txt rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\_RECoVERY_+ytcth.png rviejkpjudmk.exe File opened for modification C:\Program Files\7-Zip\Lang\ps.txt rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\el-GR\_RECoVERY_+ytcth.png rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\auxpad\_RECoVERY_+ytcth.txt rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\keypad\_RECoVERY_+ytcth.txt rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\symbols\_RECoVERY_+ytcth.txt rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\keypad\_RECoVERY_+ytcth.png rviejkpjudmk.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\oskmenu\_RECoVERY_+ytcth.txt rviejkpjudmk.exe File opened for modification C:\Program Files\7-Zip\Lang\fa.txt rviejkpjudmk.exe File opened for modification C:\Program Files\7-Zip\Lang\hr.txt rviejkpjudmk.exe File opened for modification C:\Program Files\7-Zip\Lang\kaa.txt rviejkpjudmk.exe File opened for modification C:\Program Files\7-Zip\Lang\mng.txt rviejkpjudmk.exe File opened for modification C:\Program Files\7-Zip\Lang\zh-cn.txt rviejkpjudmk.exe -
Drops file in Windows directory 2 IoCs
Processes:
885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906.exedescription ioc process File created C:\Windows\rviejkpjudmk.exe 885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906.exe File opened for modification C:\Windows\rviejkpjudmk.exe 885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906.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 54 IoCs
Processes:
rviejkpjudmk.exepid process 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe 204 rviejkpjudmk.exe -
Suspicious use of AdjustPrivilegeToken 47 IoCs
Processes:
885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906.exerviejkpjudmk.exeWMIC.exevssvc.exedescription pid process Token: SeDebugPrivilege 1756 885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906.exe Token: SeDebugPrivilege 204 rviejkpjudmk.exe Token: SeIncreaseQuotaPrivilege 1644 WMIC.exe Token: SeSecurityPrivilege 1644 WMIC.exe Token: SeTakeOwnershipPrivilege 1644 WMIC.exe Token: SeLoadDriverPrivilege 1644 WMIC.exe Token: SeSystemProfilePrivilege 1644 WMIC.exe Token: SeSystemtimePrivilege 1644 WMIC.exe Token: SeProfSingleProcessPrivilege 1644 WMIC.exe Token: SeIncBasePriorityPrivilege 1644 WMIC.exe Token: SeCreatePagefilePrivilege 1644 WMIC.exe Token: SeBackupPrivilege 1644 WMIC.exe Token: SeRestorePrivilege 1644 WMIC.exe Token: SeShutdownPrivilege 1644 WMIC.exe Token: SeDebugPrivilege 1644 WMIC.exe Token: SeSystemEnvironmentPrivilege 1644 WMIC.exe Token: SeRemoteShutdownPrivilege 1644 WMIC.exe Token: SeUndockPrivilege 1644 WMIC.exe Token: SeManageVolumePrivilege 1644 WMIC.exe Token: 33 1644 WMIC.exe Token: 34 1644 WMIC.exe Token: 35 1644 WMIC.exe Token: 36 1644 WMIC.exe Token: SeIncreaseQuotaPrivilege 1644 WMIC.exe Token: SeSecurityPrivilege 1644 WMIC.exe Token: SeTakeOwnershipPrivilege 1644 WMIC.exe Token: SeLoadDriverPrivilege 1644 WMIC.exe Token: SeSystemProfilePrivilege 1644 WMIC.exe Token: SeSystemtimePrivilege 1644 WMIC.exe Token: SeProfSingleProcessPrivilege 1644 WMIC.exe Token: SeIncBasePriorityPrivilege 1644 WMIC.exe Token: SeCreatePagefilePrivilege 1644 WMIC.exe Token: SeBackupPrivilege 1644 WMIC.exe Token: SeRestorePrivilege 1644 WMIC.exe Token: SeShutdownPrivilege 1644 WMIC.exe Token: SeDebugPrivilege 1644 WMIC.exe Token: SeSystemEnvironmentPrivilege 1644 WMIC.exe Token: SeRemoteShutdownPrivilege 1644 WMIC.exe Token: SeUndockPrivilege 1644 WMIC.exe Token: SeManageVolumePrivilege 1644 WMIC.exe Token: 33 1644 WMIC.exe Token: 34 1644 WMIC.exe Token: 35 1644 WMIC.exe Token: 36 1644 WMIC.exe Token: SeBackupPrivilege 4068 vssvc.exe Token: SeRestorePrivilege 4068 vssvc.exe Token: SeAuditPrivilege 4068 vssvc.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906.exerviejkpjudmk.exedescription pid process target process PID 1756 wrote to memory of 204 1756 885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906.exe rviejkpjudmk.exe PID 1756 wrote to memory of 204 1756 885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906.exe rviejkpjudmk.exe PID 1756 wrote to memory of 204 1756 885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906.exe rviejkpjudmk.exe PID 1756 wrote to memory of 3880 1756 885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906.exe cmd.exe PID 1756 wrote to memory of 3880 1756 885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906.exe cmd.exe PID 1756 wrote to memory of 3880 1756 885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906.exe cmd.exe PID 204 wrote to memory of 1644 204 rviejkpjudmk.exe WMIC.exe PID 204 wrote to memory of 1644 204 rviejkpjudmk.exe WMIC.exe -
System policy modification 1 TTPs 2 IoCs
Processes:
rviejkpjudmk.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections = "1" rviejkpjudmk.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System rviejkpjudmk.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906.exe"C:\Users\Admin\AppData\Local\Temp\885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906.exe"1⤵
- Checks computer location settings
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1756 -
C:\Windows\rviejkpjudmk.exeC:\Windows\rviejkpjudmk.exe2⤵
- Executes dropped EXE
- Checks computer location settings
- Adds Run key to start application
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:204 -
C:\Windows\System32\wbem\WMIC.exe"C:\Windows\System32\wbem\WMIC.exe" shadowcopy delete /nointeractive3⤵
- Suspicious use of AdjustPrivilegeToken
PID:1644
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c DEL C:\Users\Admin\AppData\Local\Temp\885BD1~1.EXE2⤵PID:3880
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4068
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
424KB
MD5823ece0c42f0a1527a81efe1cff9591a
SHA1dc0fc3de6b66447a632d1055fe58d59e2f3c0099
SHA256885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906
SHA512c651c4641f9edc780b9eee94342eeafb0d074cbe3a196660c9c55e7ba54c653dfe6e9112e329ff6d1361cd43939725ae5d0b708042d28e51c1c99151af45a360
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Filesize
424KB
MD5823ece0c42f0a1527a81efe1cff9591a
SHA1dc0fc3de6b66447a632d1055fe58d59e2f3c0099
SHA256885bd1f7da66a6fd57131d75c7074836565fddcc6c9fedf6f7bb71a4544d4906
SHA512c651c4641f9edc780b9eee94342eeafb0d074cbe3a196660c9c55e7ba54c653dfe6e9112e329ff6d1361cd43939725ae5d0b708042d28e51c1c99151af45a360