mountlocker | 85b53edb2e3476bdb29f98bd19c56baa0205e6620917e654cbe81c9745d6193d

Resubmissions

30-04-2024 05:29

240430-f6xncade75 10

11-04-2024 13:06

240411-qb4taafb9w 10

11-04-2024 12:33

240411-pq9seaeg2z 10

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
30-04-2024 05:29

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General

Target

ed6e7169456ef1f41f6a45812dda7d98_JaffaCakes118.dll
Size

56KB
MD5

ed6e7169456ef1f41f6a45812dda7d98
SHA1

c82733e2d394b272db6cbf49aa8a1207c8d9fb87
SHA256

85b53edb2e3476bdb29f98bd19c56baa0205e6620917e654cbe81c9745d6193d
SHA512

0e7d3dbe68de4301501df68b1eeb36bf68ca3ea61091710352f68f09f8f9b8b96888ccb2419330b2fbd7b592bd98b583aaea818345c87d591b9b0a96845b8d87
SSDEEP

768:65h+QW4yKs5INTjabOSQwrPG12nFb5GnVWs6k:63XWNKQ2jnSQyNnFbgN

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

Drops desktop.ini file(s) 6 IoCs

description	ioc	Process
File opened for modification	\??\c:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\F9UL0C6O\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\J3XTYXPF\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\JYWEBS5E\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\PY5FLSJ8\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Admin\AppData\Local\Microsoft\Windows Mail\Stationery\Desktop.ini	rundll32.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)	\??\f:	rundll32.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	\??\c:\Program Files\RecoveryManual.html	rundll32.exe
File created	\??\c:\Program Files (x86)\RecoveryManual.html	rundll32.exe
File created	\??\c:\Program Files (x86)\Microsoft SQL Server Compact Edition\v3.5\RecoveryManual.html	rundll32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000_CLASSES\.F30D4911	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000_CLASSES\.F30D4911\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000_CLASSES\.F30D4911\shell\Open	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000_CLASSES\.F30D4911\shell\Open\command\ = "explorer.exe RecoveryManual.html"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000_CLASSES\.F30D4911\shell\Open\command	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2880	rundll32.exe
2880	rundll32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeRestorePrivilege	2880	rundll32.exe
Token: SeDebugPrivilege	2880	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2236 wrote to memory of 2880	2236	rundll32.exe	28
PID 2236 wrote to memory of 2880	2236	rundll32.exe	28
PID 2236 wrote to memory of 2880	2236	rundll32.exe	28
PID 2236 wrote to memory of 2880	2236	rundll32.exe	28
PID 2236 wrote to memory of 2880	2236	rundll32.exe	28
PID 2236 wrote to memory of 2880	2236	rundll32.exe	28
PID 2236 wrote to memory of 2880	2236	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ed6e7169456ef1f41f6a45812dda7d98_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2236
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\ed6e7169456ef1f41f6a45812dda7d98_JaffaCakes118.dll,#1
  2⤵
  - Drops desktop.ini file(s)
  - Enumerates connected drives
  - Drops file in Program Files directory
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2880

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:1448

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\RecoveryManual.html

Filesize
2KB

MD5
cbc6137d4e60313110af6e3b186c4152

SHA1
0cb0c088b4ab2fa5aacfbecd3eb7ef7feabd217b

SHA256
e9d95fda4d60aedf9015ffd60744cfe42753dc2d2cf94690cddc786608b3f39c

SHA512
553a6f72830d15cb06864cc9f591b37f0ab11f30f2a3fe69b9742ae1c890ada72e975e99c42d41e903eb7a09877352465b2f26be595b52b19ae10ee46ef024b0

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