mountlocker | b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f

General

Target

b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
Size

161KB
MD5

7f43257736fa07f70086aefe917096bf
SHA1

09c35d8d7d6d8aca94ad1f7236752ea877e93ecc
SHA256

b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f
SHA512

a831267c79980a9cce218a1c670e2b740e87a43b39363202029f06f6a24e18be45ca06732aa4b4e40421843762a453b07c453db271848547539ceea7b12c358e

Score

10^/10

mountlocker ransomware

Malware Config

Signatures

MountLocker Ransomware
Ransomware family first seen in late 2020, which threatens to leak files if ransom is not paid.
ransomware mountlocker

Modifies extensions of user files 4 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe

description	ioc	process
File renamed	C:\Users\Admin\Pictures\TraceRevoke.tiff => \??\c:\Users\Admin\Pictures\TraceRevoke.tiff.ReadManual.1804AE40	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File renamed	C:\Users\Admin\Pictures\OptimizeFormat.tif => \??\c:\Users\Admin\Pictures\OptimizeFormat.tif.ReadManual.1804AE40	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File renamed	C:\Users\Admin\Pictures\RequestApprove.crw => \??\c:\Users\Admin\Pictures\RequestApprove.crw.ReadManual.1804AE40	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Admin\Pictures\TraceRevoke.tiff	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

316 cmd.exe

pid	process
316	cmd.exe

Drops desktop.ini file(s) 26 IoCs

Processes:

b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe

description	ioc	process
File opened for modification	\??\c:\Users\Admin\Documents\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Admin\Links\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Public\Documents\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Public\Recorded TV\Sample Media\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Public\Music\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Public\Recorded TV\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Public\Videos\Sample Videos\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Admin\Contacts\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Admin\Desktop\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Admin\Videos\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Public\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Public\Downloads\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Public\Libraries\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Public\Pictures\Sample Pictures\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Admin\Favorites\Links\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Admin\Saved Games\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Admin\Searches\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Public\Desktop\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Admin\Pictures\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Public\Music\Sample Music\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Public\Pictures\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Public\Videos\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Admin\Downloads\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Admin\Favorites\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Admin\Favorites\Links for United States\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File opened for modification	\??\c:\Users\Admin\Music\desktop.ini	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe

Drops file in Program Files directory 3 IoCs

Processes:

b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe

description	ioc	process
File created	\??\c:\Program Files (x86)\Microsoft SQL Server Compact Edition\v3.5\RecoveryManual.html	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File created	\??\c:\Program Files\RecoveryManual.html	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
File created	\??\c:\Program Files (x86)\RecoveryManual.html	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe

Modifies registry class 5 IoCs

Processes:

b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000_CLASSES\.1804AE40\shell\Open	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000_CLASSES\.1804AE40\shell\Open\command\ = "explorer.exe RecoveryManual.html"	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000_CLASSES\.1804AE40\shell\Open\command	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000_CLASSES\.1804AE40	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000_CLASSES\.1804AE40\shell	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe

pid	process
1996	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
1996	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe

description pid process

Token: SeRestorePrivilege 1996 b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe

description	pid	process
Token: SeRestorePrivilege	1996	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.execmd.exe

description	pid	process	target process
PID 1996 wrote to memory of 316	1996	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe	cmd.exe
PID 1996 wrote to memory of 316	1996	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe	cmd.exe
PID 1996 wrote to memory of 316	1996	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe	cmd.exe
PID 1996 wrote to memory of 316	1996	b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe	cmd.exe
PID 316 wrote to memory of 1812	316	cmd.exe	attrib.exe
PID 316 wrote to memory of 1812	316	cmd.exe	attrib.exe
PID 316 wrote to memory of 1812	316	cmd.exe	attrib.exe
PID 316 wrote to memory of 1812	316	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

1812 attrib.exe

pid	process
1812	attrib.exe

C:\Users\Admin\AppData\Local\Temp\b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe
"C:\Users\Admin\AppData\Local\Temp\b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe"
1⤵
- Modifies extensions of user files
- Drops desktop.ini file(s)
- Drops file in Program Files directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1996
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\\0F745744.bat" "C:\Users\Admin\AppData\Local\Temp\b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe""
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:316
- - C:\Windows\SysWOW64\attrib.exe
    attrib -s -r -h "C:\Users\Admin\AppData\Local\Temp\b26749b17ca691328ba67ee49d4d9997c101966c607ab578afad204459b7bf8f.bin.exe"
    3⤵
    - Views/modifies file attributes
    PID:1812

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

1

T1158

Privilege Escalation

Defense Evasion

Hidden Files and Directories

1

T1158

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\0F745744.bat

MD5
348cae913e496198548854f5ff2f6d1e

SHA1
a07655b9020205bd47084afd62a8bb22b48c0cdc

SHA256
c80128f51871eec3ae2057989a025ce244277c1c180498a5aaef45d5214b8506

SHA512
799796736d41d3fcb5a7c859571bb025ca2d062c4b86e078302be68c1a932ed4f78e003640df5405274364b5a9a9c0ba5e37177997683ee7ab54e5267590b611

Download Submit
memory/316-63-0x0000000000000000-mapping.dmp

Download
memory/1812-65-0x0000000000000000-mapping.dmp

Download
memory/1996-60-0x0000000075D41000-0x0000000075D43000-memory.dmp

Filesize
8KB

Download
memory/1996-61-0x0000000000220000-0x000000000022C000-memory.dmp

Filesize
48KB

Download
memory/1996-62-0x0000000000400000-0x0000000002B98000-memory.dmp

Filesize
39.6MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads