ace36c6b14274d0ce656640277454f1ce3ce079bcbf0608bcf6070fb02cd9fc8

General

Target

sample.exe
Size

171KB
MD5

d3d0035a769e6ef98b1433160b2c8333
SHA1

be1d0aed32308166721d4756e2216dc44c2d0baa
SHA256

6b6158f74dbd43b8c839d5ae65d33ae9a11c9e3cef5fa52d86105983a67cdc4f
SHA512

b86b1ab9ad2c4c851c8712d0e49321cd3f9671815592bd4228664d236093cbb904f091dc7ad60815a56da5f9face2ce11fbd84790afca4d480ae17fa76dcb229

Score

8^/10

ransomware spyware stealer

Malware Config

Signatures

Modifies extensions of user files 7 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File created	C:\Users\Admin\Pictures\CloseWatch.crw.mcburglar	sample.exe
File created	C:\Users\Admin\Pictures\ConvertResolve.crw.mcburglar	sample.exe
File created	C:\Users\Admin\Pictures\ExportUnpublish.raw.mcburglar	sample.exe
File created	C:\Users\Admin\Pictures\InstallComplete.png.mcburglar	sample.exe
File created	C:\Users\Admin\Pictures\SaveOptimize.crw.mcburglar	sample.exe
File created	C:\Users\Admin\Pictures\WatchRename.raw.mcburglar	sample.exe
File created	C:\Users\Admin\Pictures\WriteRename.png.mcburglar	sample.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

Drops desktop.ini file(s) 12 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	sample.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\MLS6OOW4\desktop.ini	sample.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\XVLP3GFJ\desktop.ini	sample.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	sample.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	sample.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	sample.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	sample.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	sample.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\desktop.ini	sample.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\93PHUZFG\desktop.ini	sample.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\VLFEZDK1\desktop.ini	sample.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	sample.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 3 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000_Classes\Local Settings	rundll32.exe

Opens file in notepad (likely ransom note) 2 IoCs

ransomware

pid	Process
840	NOTEPAD.EXE
868	NOTEPAD.EXE

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: 33	1644	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1644	AUDIODG.EXE
Token: 33	1644	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1644	AUDIODG.EXE

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 904 wrote to memory of 840	904	rundll32.exe	31
PID 904 wrote to memory of 840	904	rundll32.exe	31
PID 904 wrote to memory of 840	904	rundll32.exe	31

C:\Users\Admin\AppData\Local\Temp\sample.exe
"C:\Users\Admin\AppData\Local\Temp\sample.exe"
1⤵
- Modifies extensions of user files
- Drops desktop.ini file(s)
PID:1616

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\Desktop\desktop.ini.mcburglar
1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:904
- C:\Windows\system32\NOTEPAD.EXE
  "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\desktop.ini.mcburglar
  2⤵
  - Opens file in notepad (likely ransom note)
  PID:840

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\Desktop\AddRevoke.avi.mcburglar
1⤵
- Modifies registry class
PID:320

C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\README-MCBURGLAR.txt
1⤵
PID:1396

C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Documents\WaitLock.txt
1⤵
- Opens file in notepad (likely ransom note)
PID:868

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x48c
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1644

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/904-64-0x000007FEFB881000-0x000007FEFB883000-memory.dmp

Filesize
8KB

Download
memory/1616-60-0x0000000000AC0000-0x0000000000AC1000-memory.dmp

Filesize
4KB

Download
memory/1616-62-0x0000000075631000-0x0000000075633000-memory.dmp

Filesize
8KB

Download
memory/1616-63-0x0000000004980000-0x0000000004981000-memory.dmp

Filesize
4KB

Download

Analysis

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