ransomexx_win | 64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-en-20211014
submitted
30-11-2021 13:19

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General

Target

64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe
Size

156KB
MD5

1af3b3dbc826f6dadf14025588ff96f6
SHA1

5238ba19bb3c7298ee13fe6eb0cf5f8787c13cd8
SHA256

64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4
SHA512

a2dfefe1e78e3267755e45cefb88ffc65240b6c0aaf8546480ce38a2d6432f7907be86aeb579095e4781b21a0125434e6c945777ca50362765ce63324aac282d

Score

10^/10

ransomexx_win evasion ransomware

Malware Config

Extracted

Path

C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\!TXDOT_READ_ME!.txt

Ransom Note

Greetings, Texas Department of Transportation! Read this message CAREFULLY and contact someone from IT department. Your files are securely ENCRYPTED. No third party decryption software EXISTS. MODIFICATION or RENAMING encrypted files may cause decryption failure. You can send us an encrypted file (not greater than 400KB) and we will decrypt it FOR FREE, so you have no doubts in possibility to restore all files from all affected systems ANY TIME. Encrypted file SHOULD NOT contain sensitive information (technical, backups, databases, large documents). The rest of data will be available after the PAYMENT. Infrastructure rebuild will cost you MUCH more. Contact us ONLY if you officially represent the whole affected network. The ONLY attachments we accept are non archived encrypted files for test decryption. Speak ENGLISH when contacting us. Mail us: [email protected] We kindly ask you not to use GMAIL, YAHOO or LIVE to contact us. The PRICE depends on how quickly you do it. �

Emails

[email protected]

Signatures

Deletes NTFS Change Journal 2 TTPs
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
RansomEXX Ransomware
Targeted ransomware with variants which affect Windows and Linux systems.
ransomware ransomexx_win
Clears Windows event logs 1 TTPs
evasion ransomware

Indicator Removal on Host
T1070

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
1316	bcdedit.exe
1816	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
1544	wbadmin.exe

Disables use of System Restore points 1 TTPs
evasion

Inhibit System Recovery
T1490

Modifies extensions of user files 1 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\SelectTest.raw => C:\Users\Admin\Pictures\SelectTest.raw.txd0t	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.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

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

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe
1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe
1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe
1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe
1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe
1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe
1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe
1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe
1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe

Suspicious use of AdjustPrivilegeToken 13 IoCs

description	pid	Process
Token: SeSecurityPrivilege	1908	wevtutil.exe
Token: SeBackupPrivilege	1908	wevtutil.exe
Token: SeSecurityPrivilege	1704	wevtutil.exe
Token: SeSecurityPrivilege	1720	wevtutil.exe
Token: SeSecurityPrivilege	1260	wevtutil.exe
Token: SeBackupPrivilege	1704	wevtutil.exe
Token: SeBackupPrivilege	1720	wevtutil.exe
Token: SeBackupPrivilege	1260	wevtutil.exe
Token: SeSecurityPrivilege	1216	wevtutil.exe
Token: SeBackupPrivilege	1216	wevtutil.exe
Token: SeBackupPrivilege	1804	wbengine.exe
Token: SeRestorePrivilege	1804	wbengine.exe
Token: SeSecurityPrivilege	1804	wbengine.exe

Suspicious use of WriteProcessMemory 48 IoCs

description	pid	Process	procid_target
PID 1752 wrote to memory of 1316	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	30
PID 1752 wrote to memory of 1316	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	30
PID 1752 wrote to memory of 1316	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	30
PID 1752 wrote to memory of 1316	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	30
PID 1752 wrote to memory of 1816	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	33
PID 1752 wrote to memory of 1816	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	33
PID 1752 wrote to memory of 1816	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	33
PID 1752 wrote to memory of 1816	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	33
PID 1752 wrote to memory of 1468	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	31
PID 1752 wrote to memory of 1468	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	31
PID 1752 wrote to memory of 1468	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	31
PID 1752 wrote to memory of 1468	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	31
PID 1752 wrote to memory of 1000	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	32
PID 1752 wrote to memory of 1000	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	32
PID 1752 wrote to memory of 1000	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	32
PID 1752 wrote to memory of 1000	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	32
PID 1752 wrote to memory of 1544	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	34
PID 1752 wrote to memory of 1544	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	34
PID 1752 wrote to memory of 1544	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	34
PID 1752 wrote to memory of 1544	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	34
PID 1752 wrote to memory of 1908	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	39
PID 1752 wrote to memory of 1908	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	39
PID 1752 wrote to memory of 1908	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	39
PID 1752 wrote to memory of 1908	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	39
PID 1752 wrote to memory of 1720	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	38
PID 1752 wrote to memory of 1720	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	38
PID 1752 wrote to memory of 1720	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	38
PID 1752 wrote to memory of 1720	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	38
PID 1752 wrote to memory of 1704	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	40
PID 1752 wrote to memory of 1704	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	40
PID 1752 wrote to memory of 1704	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	40
PID 1752 wrote to memory of 1704	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	40
PID 1752 wrote to memory of 1260	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	37
PID 1752 wrote to memory of 1260	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	37
PID 1752 wrote to memory of 1260	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	37
PID 1752 wrote to memory of 1260	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	37
PID 1752 wrote to memory of 1216	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	36
PID 1752 wrote to memory of 1216	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	36
PID 1752 wrote to memory of 1216	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	36
PID 1752 wrote to memory of 1216	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	36
PID 1752 wrote to memory of 1768	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	41
PID 1752 wrote to memory of 1768	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	41
PID 1752 wrote to memory of 1768	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	41
PID 1752 wrote to memory of 1768	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	41
PID 1752 wrote to memory of 1944	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	42
PID 1752 wrote to memory of 1944	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	42
PID 1752 wrote to memory of 1944	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	42
PID 1752 wrote to memory of 1944	1752	64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe	42

C:\Users\Admin\AppData\Local\Temp\64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe
"C:\Users\Admin\AppData\Local\Temp\64c51351aafb4cd339934a78d064847bdd833b963eafbade86eb51ac2c1677f4.bin.sample.exe"
1⤵
- Modifies extensions of user files
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1752
- C:\Windows\System32\bcdedit.exe
  "C:\Windows\System32\bcdedit.exe" /set {default} recoveryenabled no
  2⤵
  - Modifies boot configuration data using bcdedit
  PID:1316
- C:\Windows\SysWOW64\cipher.exe
  "C:\Windows\System32\cipher.exe" /w:D:
  2⤵
  - Enumerates connected drives
  PID:1468
- C:\Windows\SysWOW64\cipher.exe
  "C:\Windows\System32\cipher.exe" /w:C:
  2⤵
  PID:1000
- C:\Windows\System32\bcdedit.exe
  "C:\Windows\System32\bcdedit.exe" /set {default} bootstatuspolicy ignoreallfailures
  2⤵
  - Modifies boot configuration data using bcdedit
  PID:1816
- C:\Windows\System32\wbadmin.exe
  "C:\Windows\System32\wbadmin.exe" delete catalog -quiet
  2⤵
  - Deletes backup catalog
  PID:1544
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" sl Security /e:false
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1216
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl System
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1260
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl Security
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1720
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl Application
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1908
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl Setup
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1704
- C:\Windows\System32\fsutil.exe
  "C:\Windows\System32\fsutil.exe" usn deletejournal /D C:
  2⤵
  PID:1768
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Change /TN "\Microsoft\Windows\SystemRestore\SR" /disable
  2⤵
  PID:1944

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1804

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1728

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:944

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Command-Line Interface

T1059

Persistence

Privilege Escalation

Defense Evasion

File Deletion

T1107

Indicator Removal on Host

T1070

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Data Destruction

T1485

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

memory/1544-68-0x000007FEFC481000-0x000007FEFC483000-memory.dmp

Filesize
8KB

Download
memory/1752-55-0x0000000075C21000-0x0000000075C23000-memory.dmp

Filesize
8KB

Download