ransomexx_win | 926da8f5eafdb6a22a2ffd01fe737a589f001f2da87a244f4fa9fd2626348898

General

Target

4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
Size

156KB
MD5

fcd21c6fca3b9378961aa1865bee7ecb
SHA1

0abaa05da2a05977e0baf68838cff1712f1789e0
SHA256

4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458
SHA512

e39c1f965f6faeaa33dfec6eba23fbfff14b287f4777797ea79480bb037d6d806516bda7046315e051961fce12e935ac546819c1e0bef5c33568d68955a9792a
SSDEEP

1536:7ZLTzASUIG0TOOYTufIaSWvRYkekdvizSBXxNe9VPw6s6aUCT7Q7qn:OBI9HYyfNBdviGBBQsrhPk4

Score

10^/10

ransomexx_win evasion ransomware

Malware Config

Signatures

Deletes NTFS Change Journal 2 TTPs 1 IoCs

The USN change journal is a persistent log of all changes made to local files used by Windows Server systems.

ransomware

Inhibit System Recovery

T1490

Data Destruction

T1485

pid	Process
1512	fsutil.exe

RansomEXX Ransomware
Targeted ransomware with variants which affect Windows and Linux systems.
ransomware ransomexx_win

Clears Windows event logs 1 TTPs 4 IoCs

evasion ransomware

Indicator Removal on Host

T1070

pid	Process
2276	wevtutil.exe
3136	wevtutil.exe
636	wevtutil.exe
4968	wevtutil.exe

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
2480	bcdedit.exe
4208	bcdedit.exe

Deletes backup catalog 3 TTPs 1 IoCs

Uses wbadmin.exe to inhibit system recovery.

ransomware

Command-Line Interface

T1059

File Deletion

T1107

Inhibit System Recovery

T1490

pid	Process
2556	wbadmin.exe

Disables use of System Restore points 1 TTPs
evasion

Inhibit System Recovery
T1490

Modifies extensions of user files 5 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\FindClear.png => C:\Users\Admin\Pictures\FindClear.png.txd0t	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
File renamed	C:\Users\Admin\Pictures\LimitDisable.tif => C:\Users\Admin\Pictures\LimitDisable.tif.txd0t	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
File renamed	C:\Users\Admin\Pictures\SyncCompress.raw => C:\Users\Admin\Pictures\SyncCompress.raw.txd0t	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
File opened for modification	C:\Users\Admin\Pictures\UnprotectConvertFrom.tiff	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
File renamed	C:\Users\Admin\Pictures\UnprotectConvertFrom.tiff => C:\Users\Admin\Pictures\UnprotectConvertFrom.tiff.txd0t	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe

Overwrites deleted data with Cipher tool 1 TTPs
Cipher is a Windows tool which be used to securely wipe deallocated HDD space, preventing recovery of deleted data.
ransomware

Inhibit System Recovery
T1490

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe

Enumerates connected drives 3 TTPs 1 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\D:	cipher.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Checks SCSI registry key(s) 3 TTPs 4 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_DVD-ROM\4&215468a5&0&010000\FriendlyName	vds.exe
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

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe

Suspicious use of AdjustPrivilegeToken 13 IoCs

description	pid	Process
Token: SeSecurityPrivilege	4968	wevtutil.exe
Token: SeBackupPrivilege	4968	wevtutil.exe
Token: SeSecurityPrivilege	3136	wevtutil.exe
Token: SeBackupPrivilege	3136	wevtutil.exe
Token: SeSecurityPrivilege	2192	wevtutil.exe
Token: SeBackupPrivilege	2192	wevtutil.exe
Token: SeSecurityPrivilege	2276	wevtutil.exe
Token: SeBackupPrivilege	2276	wevtutil.exe
Token: SeSecurityPrivilege	636	wevtutil.exe
Token: SeBackupPrivilege	636	wevtutil.exe
Token: SeBackupPrivilege	1044	wbengine.exe
Token: SeRestorePrivilege	1044	wbengine.exe
Token: SeSecurityPrivilege	1044	wbengine.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 400 wrote to memory of 4968	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	102
PID 400 wrote to memory of 4968	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	102
PID 400 wrote to memory of 2480	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	98
PID 400 wrote to memory of 2480	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	98
PID 400 wrote to memory of 3136	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	95
PID 400 wrote to memory of 3136	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	95
PID 400 wrote to memory of 1860	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	104
PID 400 wrote to memory of 1860	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	104
PID 400 wrote to memory of 1860	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	104
PID 400 wrote to memory of 2276	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	103
PID 400 wrote to memory of 2276	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	103
PID 400 wrote to memory of 4208	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	101
PID 400 wrote to memory of 4208	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	101
PID 400 wrote to memory of 636	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	100
PID 400 wrote to memory of 636	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	100
PID 400 wrote to memory of 2192	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	99
PID 400 wrote to memory of 2192	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	99
PID 400 wrote to memory of 1512	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	97
PID 400 wrote to memory of 1512	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	97
PID 400 wrote to memory of 1948	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	93
PID 400 wrote to memory of 1948	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	93
PID 400 wrote to memory of 1948	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	93
PID 400 wrote to memory of 3564	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	94
PID 400 wrote to memory of 3564	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	94
PID 400 wrote to memory of 2556	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	96
PID 400 wrote to memory of 2556	400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	96

C:\Users\Admin\AppData\Local\Temp\4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
"C:\Users\Admin\AppData\Local\Temp\4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe"
1⤵
- Modifies extensions of user files
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:400
- C:\Windows\SysWOW64\cipher.exe
  "C:\Windows\System32\cipher.exe" /w:D:
  2⤵
  - Enumerates connected drives
  PID:1948
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Change /TN "\Microsoft\Windows\SystemRestore\SR" /disable
  2⤵
  PID:3564
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl Setup
  2⤵
  - Clears Windows event logs
  - Suspicious use of AdjustPrivilegeToken
  PID:3136
- C:\Windows\System32\wbadmin.exe
  "C:\Windows\System32\wbadmin.exe" delete catalog -quiet
  2⤵
  - Deletes backup catalog
  PID:2556
- C:\Windows\System32\fsutil.exe
  "C:\Windows\System32\fsutil.exe" usn deletejournal /D C:
  2⤵
  - Deletes NTFS Change Journal
  PID:1512
- C:\Windows\System32\bcdedit.exe
  "C:\Windows\System32\bcdedit.exe" /set {default} bootstatuspolicy ignoreallfailures
  2⤵
  - Modifies boot configuration data using bcdedit
  PID:2480
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" sl Security /e:false
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2192
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl Application
  2⤵
  - Clears Windows event logs
  - Suspicious use of AdjustPrivilegeToken
  PID:636
- C:\Windows\System32\bcdedit.exe
  "C:\Windows\System32\bcdedit.exe" /set {default} recoveryenabled no
  2⤵
  - Modifies boot configuration data using bcdedit
  PID:4208
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl System
  2⤵
  - Clears Windows event logs
  - Suspicious use of AdjustPrivilegeToken
  PID:4968
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl Security
  2⤵
  - Clears Windows event logs
  - Suspicious use of AdjustPrivilegeToken
  PID:2276
- C:\Windows\SysWOW64\cipher.exe
  "C:\Windows\System32\cipher.exe" /w:C:
  2⤵
  PID:1860