Analysis
-
max time kernel
128s -
max time network
120s -
platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
-
submitted
23-06-2024 22:50
General
-
Target
706cf72e86b19918cda7b573f549fa286ba005615ddf9cb4acd01cf09a0d20a6.exe
-
Size
5.6MB
-
MD5
095db264f03dba2cb16f1e3acaf60d27
-
SHA1
2b1bb5b5aedcc0dd95eb694ae53aa4ce108c85bb
-
SHA256
706cf72e86b19918cda7b573f549fa286ba005615ddf9cb4acd01cf09a0d20a6
-
SHA512
7706cdcb52fc5318ee6a14c9ba580980d7af4e851485de8662ac997359dbac140ad1cb8f31d9e71ee9574cb0307e4167c8a5e807cffabca6b093682f4d1232ea
-
SSDEEP
98304:uv9Vu+MMjYAMHlaWnAskRRZfhck06/o/Di+R1MI064hHgjhxCJpGdKeeO53LSNpw:uv988KlaOARRZfCxDbxRj6HgbCbvSLSh
Malware Config
Extracted
\Device\HarddiskVolume1\Boot\Recovery_Instructions.html
Signatures
-
MedusaLocker
Ransomware with several variants first seen in September 2019.
-
MedusaLocker payload 5 IoCs
-
UAC bypass 3 TTPs 2 IoCs
-
Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
-
Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 5 IoCs
-
Detects command variations typically used by ransomware 5 IoCs
-
Detects executables packed with VMProtect. 6 IoCs
-
Renames multiple (199) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
-
Executes dropped EXE 1 IoCs
-
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
-
VMProtect packed file 6 IoCs
Detects executables packed with VMProtect commercial packer.
-
Checks whether UAC is enabled 1 TTPs 1 IoCs
-
Drops desktop.ini file(s) 1 IoCs
-
Enumerates connected drives 3 TTPs 24 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
-
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
-
Interacts with shadow copies 3 TTPs 3 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
-
Suspicious behavior: EnumeratesProcesses 64 IoCs
-
Suspicious use of AdjustPrivilegeToken 63 IoCs
-
Suspicious use of WriteProcessMemory 28 IoCs
-
System policy modification 1 TTPs 3 IoCs
-
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
-
C:\Users\Admin\AppData\Local\Temp\706cf72e86b19918cda7b573f549fa286ba005615ddf9cb4acd01cf09a0d20a6.exe"C:\Users\Admin\AppData\Local\Temp\706cf72e86b19918cda7b573f549fa286ba005615ddf9cb4acd01cf09a0d20a6.exe"1⤵
- UAC bypass
- Checks whether UAC is enabled
- Drops desktop.ini file(s)
- Enumerates connected drives
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
- System policy modification
-
C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
-
-
C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
-
-
C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
-
-
C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
-
C:\Windows\system32\taskeng.exetaskeng.exe {34C2551B-EF1C-4D09-8380-AEEDEA5FD343} S-1-5-21-2737914667-933161113-3798636211-1000:PUMARTNR\Admin:Interactive:[1]1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Roaming\svhost.exeC:\Users\Admin\AppData\Roaming\svhost.exe2⤵
- Executes dropped EXE
-
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
1Direct Volume Access
1Impair Defenses
1Disable or Modify Tools
1Indicator Removal
2File Deletion
2Modify Registry
2Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
5.6MB
MD5095db264f03dba2cb16f1e3acaf60d27
SHA12b1bb5b5aedcc0dd95eb694ae53aa4ce108c85bb
SHA256706cf72e86b19918cda7b573f549fa286ba005615ddf9cb4acd01cf09a0d20a6
SHA5127706cdcb52fc5318ee6a14c9ba580980d7af4e851485de8662ac997359dbac140ad1cb8f31d9e71ee9574cb0307e4167c8a5e807cffabca6b093682f4d1232ea
-
Filesize
536B
MD5b0bda30fd38dad6371ec013dfa8581cc
SHA18d61942d74fdd735158dcd86705df3b02f63b095
SHA256ddf8cd0d51c0e91ebb69c13019480862ecf48ad87b05be45bbc6cd7244b9f72c
SHA512a6744dca56518dd8f0e5e1f18ee91a60c65b58abda1952bd6b3a26ecca28a750ce3dd18e221bfe960da3740f9a917442fb5b227c4afa7031dd36d3afbdbbf268
-
Filesize
4KB
MD5bd0954af014b0f99ecaf238863e2e192
SHA1d9224531e440f833d429e96ff4de645824f2c6bb
SHA2562519e5acce537f89c74d017f5b5e1b1abc491c629375a5db927b9f16f34f5ad3
SHA5121a17d705126ce60db880b7bd5be6b856e86b11a5b991f376ac6b636d8b7148a88c6804f66f10be5a1a8fad059f6e2596046a99ea1e589d7792d9b7c244e785a5
-
Filesize
9.5MB
-
Filesize
3.3MB
-
Filesize
9.5MB
-
Filesize
4KB
-
Filesize
9.5MB
-
Filesize
4KB
-
Filesize
9.5MB
-
Filesize
4KB
-
Filesize
4KB
-
Filesize
4KB
-
Filesize
9.5MB