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
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
11-04-2024 12:33

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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 spyware stealer

Malware Config

Signatures

MountLocker Ransomware
Ransomware family first seen in late 2020, which threatens to leak files if ransom is not paid.
ransomware mountlocker
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
T1552.001

Drops desktop.ini file(s) 25 IoCs

description	ioc	Process
File opened for modification	\??\c:\Users\Admin\Favorites\Links\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Admin\Pictures\Saved Pictures\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Admin\Videos\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Public\Documents\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Public\Desktop\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Public\Downloads\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Public\Videos\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Admin\Documents\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Admin\Pictures\Camera Roll\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Admin\Searches\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Public\Pictures\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Public\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Admin\3D Objects\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Public\AccountPictures\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Admin\Pictures\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Admin\OneDrive\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Admin\Saved Games\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Public\Music\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Admin\Links\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Admin\Desktop\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Admin\Downloads\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Admin\Favorites\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Admin\Music\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Public\Libraries\desktop.ini	rundll32.exe
File opened for modification	\??\c:\Users\Admin\Contacts\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 2 IoCs

description	ioc	Process
File created	\??\c:\Program Files\RecoveryManual.html	rundll32.exe
File created	\??\c:\Program Files (x86)\RecoveryManual.html	rundll32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000_Classes\.F30D4911\shell\Open	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000_Classes\.F30D4911\shell\Open\command\ = "explorer.exe RecoveryManual.html"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000_Classes\.F30D4911\shell\Open\command	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000_Classes\.F30D4911	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000_Classes\.F30D4911\shell	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2560	rundll32.exe
2560	rundll32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeRestorePrivilege	2560	rundll32.exe
Token: SeDebugPrivilege	2560	rundll32.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 428 wrote to memory of 2560	428	rundll32.exe	84
PID 428 wrote to memory of 2560	428	rundll32.exe	84
PID 428 wrote to memory of 2560	428	rundll32.exe	84
PID 2560 wrote to memory of 1592	2560	rundll32.exe	93
PID 2560 wrote to memory of 1592	2560	rundll32.exe	93
PID 2560 wrote to memory of 1592	2560	rundll32.exe	93
PID 1592 wrote to memory of 4032	1592	cmd.exe	95
PID 1592 wrote to memory of 4032	1592	cmd.exe	95
PID 1592 wrote to memory of 4032	1592	cmd.exe	95

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4032	attrib.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ed6e7169456ef1f41f6a45812dda7d98_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:428
- 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
  - Suspicious use of WriteProcessMemory
  PID:2560
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\\0E576D21.bat" "C:\Users\Admin\AppData\Local\Temp\ed6e7169456ef1f41f6a45812dda7d98_JaffaCakes118.dll""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1592
  - - C:\Windows\SysWOW64\attrib.exe
      attrib -s -r -h "C:\Users\Admin\AppData\Local\Temp\ed6e7169456ef1f41f6a45812dda7d98_JaffaCakes118.dll"
      4⤵
      Views/modifies file attributes
      PID:4032

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Recovery\WindowsRE\RecoveryManual.html

Filesize
2KB

MD5
6d4b673fda41defd1a462ecd04acd06a

SHA1
5512a88559bddc9906aa3b4019b2e4cf7d3f7df4

SHA256
f15b2d37db3e35c616ca61fbe65c40fdac6d68ec0842e812e0beed141f97a4e7

SHA512
4ecbbf596ad83265c72bd30654120458ed40a80ab3f506e0f761c7833c78566dadacbb47b4fcbe6a4f4e2b33438f17aa9f5e280608c85c86aa9761ea292a53bf

Download Submit
C:\Users\Admin\AppData\Local\Temp\0E576D21.bat

Filesize
65B

MD5
348cae913e496198548854f5ff2f6d1e

SHA1
a07655b9020205bd47084afd62a8bb22b48c0cdc

SHA256
c80128f51871eec3ae2057989a025ce244277c1c180498a5aaef45d5214b8506

SHA512
799796736d41d3fcb5a7c859571bb025ca2d062c4b86e078302be68c1a932ed4f78e003640df5405274364b5a9a9c0ba5e37177997683ee7ab54e5267590b611

Download Submit