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Overview
overview
10Static
static
10Ransomware...KB.exe
windows10-ltsc_2021-x64
7Ransomware...KB.exe
windows7-x64
10Ransomware...KB.exe
windows10-2004-x64
7Ransomware...KB.exe
windows10-ltsc_2021-x64
7Ransomware...KB.exe
windows11-21h2-x64
7Ransomware...KB.exe
windows10-ltsc_2021-x64
10Ransomware...KB.exe
windows7-x64
10Ransomware...KB.exe
windows10-2004-x64
10Ransomware...KB.exe
windows10-ltsc_2021-x64
10Ransomware...KB.exe
windows11-21h2-x64
10Ransomware...KB.exe
windows7-x64
10Ransomware...KB.exe
windows7-x64
10Ransomware...KB.exe
windows10-2004-x64
10Ransomware...KB.exe
windows10-ltsc_2021-x64
10Ransomware...KB.exe
windows11-21h2-x64
10Ransomware...KB.exe
windows10-2004-x64
9Ransomware...KB.exe
windows7-x64
9Ransomware...KB.exe
windows10-2004-x64
9Ransomware...KB.exe
windows10-ltsc_2021-x64
9Ransomware...KB.exe
windows11-21h2-x64
9Ransomware...KB.exe
windows11-21h2-x64
9Ransomware...KB.exe
windows7-x64
9Ransomware...KB.exe
windows10-2004-x64
9Ransomware...KB.exe
windows10-ltsc_2021-x64
9Ransomware...KB.exe
windows11-21h2-x64
9Ransomware...KB.ps1
windows11-21h2-x64
10Ransomware...KB.ps1
windows7-x64
10Ransomware...KB.ps1
windows10-2004-x64
10Ransomware...KB.ps1
windows10-ltsc_2021-x64
10Ransomware...KB.ps1
windows11-21h2-x64
10Resubmissions
25/03/2025, 15:11
250325-skmbpsxzaw 1025/03/2025, 15:06
250325-sg1d6a1px2 1025/03/2025, 15:01
250325-sd5jpsxyct 1025/03/2025, 14:56
250325-sbdcfaxxgs 1025/03/2025, 14:50
250325-r7ve6a1nv3 1025/03/2025, 14:46
250325-r5ab7sxwhx 1025/03/2025, 14:40
250325-r2c9paxwe1 1005/02/2025, 10:25
250205-mgcefaslhw 1005/02/2025, 10:17
250205-mbs51atmbk 1005/02/2025, 09:15
250205-k785zs1pfn 10Analysis
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max time kernel
119s -
max time network
105s -
platform
windows11-21h2_x64 -
resource
win11-20250313-en -
resource tags
arch:x64arch:x86image:win11-20250313-enlocale:en-usos:windows11-21h2-x64system -
submitted
25/03/2025, 14:56
Static task
static1
Behavioral task
behavioral1
Sample
RansomwareSamples/MAKOP_27_10_2020_115KB.exe
Resource
win10ltsc2021-20250314-en
Behavioral task
behavioral2
Sample
RansomwareSamples/MAKOP_27_10_2020_115KB.exe
Resource
win7-20241010-en
Behavioral task
behavioral3
Sample
RansomwareSamples/MAKOP_27_10_2020_115KB.exe
Resource
win10v2004-20250314-en
Behavioral task
behavioral4
Sample
RansomwareSamples/MAKOP_27_10_2020_115KB.exe
Resource
win10ltsc2021-20250314-en
Behavioral task
behavioral5
Sample
RansomwareSamples/MAKOP_27_10_2020_115KB.exe
Resource
win11-20250313-en
Behavioral task
behavioral6
Sample
RansomwareSamples/MedusaLocker_24_04_2020_661KB.exe
Resource
win10ltsc2021-20250314-en
Behavioral task
behavioral7
Sample
RansomwareSamples/MedusaLocker_24_04_2020_661KB.exe
Resource
win7-20240903-en
Behavioral task
behavioral8
Sample
RansomwareSamples/MedusaLocker_24_04_2020_661KB.exe
Resource
win10v2004-20250314-en
Behavioral task
behavioral9
Sample
RansomwareSamples/MedusaLocker_24_04_2020_661KB.exe
Resource
win10ltsc2021-20250314-en
Behavioral task
behavioral10
Sample
RansomwareSamples/MedusaLocker_24_04_2020_661KB.exe
Resource
win11-20250313-en
Behavioral task
behavioral11
Sample
RansomwareSamples/MountLocker_20_11_2020_200KB.exe
Resource
win7-20241010-en
Behavioral task
behavioral12
Sample
RansomwareSamples/MountLocker_20_11_2020_200KB.exe
Resource
win7-20250207-en
Behavioral task
behavioral13
Sample
RansomwareSamples/MountLocker_20_11_2020_200KB.exe
Resource
win10v2004-20250314-en
Behavioral task
behavioral14
Sample
RansomwareSamples/MountLocker_20_11_2020_200KB.exe
Resource
win10ltsc2021-20250314-en
Behavioral task
behavioral15
Sample
RansomwareSamples/MountLocker_20_11_2020_200KB.exe
Resource
win11-20250313-en
Behavioral task
behavioral16
Sample
RansomwareSamples/Nefilim_31_08_2020_3061KB.exe
Resource
win10v2004-20250314-en
Behavioral task
behavioral17
Sample
RansomwareSamples/Nefilim_31_08_2020_3061KB.exe
Resource
win7-20240903-en
Behavioral task
behavioral18
Sample
RansomwareSamples/Nefilim_31_08_2020_3061KB.exe
Resource
win10v2004-20250314-en
Behavioral task
behavioral19
Sample
RansomwareSamples/Nefilim_31_08_2020_3061KB.exe
Resource
win10ltsc2021-20250314-en
Behavioral task
behavioral20
Sample
RansomwareSamples/Nefilim_31_08_2020_3061KB.exe
Resource
win11-20250313-en
Behavioral task
behavioral21
Sample
RansomwareSamples/Nemty_03_02_2021_124KB.exe
Resource
win11-20250314-en
Behavioral task
behavioral22
Sample
RansomwareSamples/Nemty_03_02_2021_124KB.exe
Resource
win7-20241023-en
Behavioral task
behavioral23
Sample
RansomwareSamples/Nemty_03_02_2021_124KB.exe
Resource
win10v2004-20250314-en
Behavioral task
behavioral24
Sample
RansomwareSamples/Nemty_03_02_2021_124KB.exe
Resource
win10ltsc2021-20250314-en
Behavioral task
behavioral25
Sample
RansomwareSamples/Nemty_03_02_2021_124KB.exe
Resource
win11-20250313-en
Behavioral task
behavioral26
Sample
RansomwareSamples/NetWalker_19_10_2020_903KB.ps1
Resource
win11-20250313-en
Behavioral task
behavioral27
Sample
RansomwareSamples/NetWalker_19_10_2020_903KB.ps1
Resource
win7-20241010-en
Behavioral task
behavioral28
Sample
RansomwareSamples/NetWalker_19_10_2020_903KB.ps1
Resource
win10v2004-20250314-en
Behavioral task
behavioral29
Sample
RansomwareSamples/NetWalker_19_10_2020_903KB.ps1
Resource
win10ltsc2021-20250314-en
Behavioral task
behavioral30
Sample
RansomwareSamples/NetWalker_19_10_2020_903KB.ps1
Resource
win11-20250313-en
General
-
Target
RansomwareSamples/MedusaLocker_24_04_2020_661KB.exe
-
Size
661KB
-
MD5
19ddac9782acd73f66c5fe040e86ddee
-
SHA1
24ceba1e2951cde8e41939da21c6ba3030fc531d
-
SHA256
dde3c98b6a370fb8d1785f3134a76cb465cd663db20dffe011da57a4de37aa95
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SHA512
e7be7472241fdd26db48dbd0311afe821905f6d59dfb56e3dc035944b7346b0767a8af76d110c5f60c0ba0183ca3791e56d9b3c8b9ba887afa111aafc949c1d4
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SSDEEP
12288:vN3K5e8nbwFigzk6VVMqX8aQNRMcauV9B/rtiPnA40Q8:hCXbwFigzkQVdXvlcayDh49
Malware Config
Extracted
C:\Recovery\WindowsRE\HOW_TO_RECOVER_DATA.html
href="mailto:[email protected]">[email protected]</a><br>
href="mailto:[email protected]">[email protected]</a>
http-equiv="X-UA-Compatible"
Signatures
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MedusaLocker
Ransomware with several variants first seen in September 2019.
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MedusaLocker payload 1 IoCs
resource yara_rule behavioral10/files/0x001900000002adde-490.dat family_medusalocker -
Medusalocker family
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UAC bypass 3 TTPs 2 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" MedusaLocker_24_04_2020_661KB.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" MedusaLocker_24_04_2020_661KB.exe -
Renames multiple (163) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Executes dropped EXE 1 IoCs
pid Process 3392 svchostt.exe -
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Checks whether UAC is enabled 1 TTPs 1 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" MedusaLocker_24_04_2020_661KB.exe -
Enumerates connected drives 3 TTPs 24 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
description ioc Process File opened (read-only) \??\T: MedusaLocker_24_04_2020_661KB.exe File opened (read-only) \??\N: MedusaLocker_24_04_2020_661KB.exe File opened (read-only) \??\F: MedusaLocker_24_04_2020_661KB.exe File opened (read-only) \??\A: MedusaLocker_24_04_2020_661KB.exe File opened (read-only) \??\B: MedusaLocker_24_04_2020_661KB.exe File opened (read-only) \??\I: MedusaLocker_24_04_2020_661KB.exe File opened (read-only) \??\M: MedusaLocker_24_04_2020_661KB.exe File opened (read-only) \??\S: MedusaLocker_24_04_2020_661KB.exe File opened (read-only) \??\U: MedusaLocker_24_04_2020_661KB.exe File opened (read-only) \??\H: MedusaLocker_24_04_2020_661KB.exe File opened (read-only) \??\O: MedusaLocker_24_04_2020_661KB.exe File opened (read-only) \??\V: MedusaLocker_24_04_2020_661KB.exe File opened (read-only) \??\X: MedusaLocker_24_04_2020_661KB.exe File opened (read-only) \??\Y: MedusaLocker_24_04_2020_661KB.exe File opened (read-only) \??\Z: MedusaLocker_24_04_2020_661KB.exe File opened (read-only) \??\E: MedusaLocker_24_04_2020_661KB.exe File opened (read-only) \??\G: MedusaLocker_24_04_2020_661KB.exe File opened (read-only) \??\K: MedusaLocker_24_04_2020_661KB.exe File opened (read-only) \??\Q: MedusaLocker_24_04_2020_661KB.exe File opened (read-only) \??\W: MedusaLocker_24_04_2020_661KB.exe File opened (read-only) \??\J: MedusaLocker_24_04_2020_661KB.exe File opened (read-only) \??\L: MedusaLocker_24_04_2020_661KB.exe File opened (read-only) \??\P: MedusaLocker_24_04_2020_661KB.exe File opened (read-only) \??\R: MedusaLocker_24_04_2020_661KB.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 3 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language MedusaLocker_24_04_2020_661KB.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language wmic.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language svchostt.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe 560 MedusaLocker_24_04_2020_661KB.exe -
Suspicious use of AdjustPrivilegeToken 21 IoCs
description pid Process Token: SeIncreaseQuotaPrivilege 5236 wmic.exe Token: SeSecurityPrivilege 5236 wmic.exe Token: SeTakeOwnershipPrivilege 5236 wmic.exe Token: SeLoadDriverPrivilege 5236 wmic.exe Token: SeSystemProfilePrivilege 5236 wmic.exe Token: SeSystemtimePrivilege 5236 wmic.exe Token: SeProfSingleProcessPrivilege 5236 wmic.exe Token: SeIncBasePriorityPrivilege 5236 wmic.exe Token: SeCreatePagefilePrivilege 5236 wmic.exe Token: SeBackupPrivilege 5236 wmic.exe Token: SeRestorePrivilege 5236 wmic.exe Token: SeShutdownPrivilege 5236 wmic.exe Token: SeDebugPrivilege 5236 wmic.exe Token: SeSystemEnvironmentPrivilege 5236 wmic.exe Token: SeRemoteShutdownPrivilege 5236 wmic.exe Token: SeUndockPrivilege 5236 wmic.exe Token: SeManageVolumePrivilege 5236 wmic.exe Token: 33 5236 wmic.exe Token: 34 5236 wmic.exe Token: 35 5236 wmic.exe Token: 36 5236 wmic.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 560 wrote to memory of 5236 560 MedusaLocker_24_04_2020_661KB.exe 78 PID 560 wrote to memory of 5236 560 MedusaLocker_24_04_2020_661KB.exe 78 PID 560 wrote to memory of 5236 560 MedusaLocker_24_04_2020_661KB.exe 78 -
System policy modification 1 TTPs 3 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" MedusaLocker_24_04_2020_661KB.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" MedusaLocker_24_04_2020_661KB.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections = "1" MedusaLocker_24_04_2020_661KB.exe -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\RansomwareSamples\MedusaLocker_24_04_2020_661KB.exe"C:\Users\Admin\AppData\Local\Temp\RansomwareSamples\MedusaLocker_24_04_2020_661KB.exe"1⤵
- UAC bypass
- Checks whether UAC is enabled
- Enumerates connected drives
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
- System policy modification
PID:560 -
C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:5236
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k NetworkService -p -s LanmanWorkstation1⤵PID:1680
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C:\Users\Admin\AppData\Roaming\svchostt.exeC:\Users\Admin\AppData\Roaming\svchostt.exe1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:3392
Network
MITRE ATT&CK Enterprise v15
Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Defense Evasion
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Impair Defenses
1Disable or Modify Tools
1Modify Registry
2Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
27KB
MD5724e3375205e266bdbe91e25d9197536
SHA14ec20aa00115cdf8752642a96532114bd28ad4b2
SHA25698d01316f7a26b5e167b0bc1d2d4eeda3c0ef4773146edb9a3402a1512fcad5e
SHA51291ea27b73759e8988a2ed573a9249d2cae3f55a60ec45a494292dafb62d3ed6ee0ad12c426d614228bbcbb539582959267e3fbabbbe238208429d0af38d29e0e
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Filesize
661KB
MD519ddac9782acd73f66c5fe040e86ddee
SHA124ceba1e2951cde8e41939da21c6ba3030fc531d
SHA256dde3c98b6a370fb8d1785f3134a76cb465cd663db20dffe011da57a4de37aa95
SHA512e7be7472241fdd26db48dbd0311afe821905f6d59dfb56e3dc035944b7346b0767a8af76d110c5f60c0ba0183ca3791e56d9b3c8b9ba887afa111aafc949c1d4