Analysis
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max time kernel
148s -
max time network
135s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
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submitted
06-05-2024 17:41
General
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Target
26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe
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Size
669KB
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MD5
646698572afbbf24f50ec5681feb2db7
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SHA1
70530bc23bad38e6aee66cbb2c2f58a96a18fb79
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SHA256
26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0
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SHA512
89bad552a3c0d8b28550957872561d03bf239d2708d616f21cbf22e58ae749542b07eee00fedac6fdb83c5969f50ea0f56fc103264a164671a94e156f73f160a
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SSDEEP
12288:dQA0FfTcwpBuV2UxqDmuiLZeUaoFi2XZWfGe615HhAZV8D4KD/KeX:Tuf4wTuV2Ux3uIZeUBi2Te6HWdKrKe
Malware Config
Extracted
\Device\HarddiskVolume1\how_to_back_files.html
Signatures
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MedusaLocker
Ransomware with several variants first seen in September 2019.
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MedusaLocker payload 1 IoCs
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UAC bypass 3 TTPs 2 IoCs
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Renames multiple (220) 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
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Reads user/profile data of web browsers 2 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
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Drops desktop.ini file(s) 1 IoCs
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Enumerates connected drives 3 TTPs 24 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 64 IoCs
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Suspicious use of AdjustPrivilegeToken 63 IoCs
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Suspicious use of WriteProcessMemory 9 IoCs
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System policy modification 1 TTPs 3 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.exe"C:\Users\Admin\AppData\Local\Temp\26af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0.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
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Roaming\svhost.exeC:\Users\Admin\AppData\Roaming\svhost.exe1⤵
- 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
1Impair Defenses
1Disable or Modify Tools
1Modify Registry
2Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
669KB
MD5646698572afbbf24f50ec5681feb2db7
SHA170530bc23bad38e6aee66cbb2c2f58a96a18fb79
SHA25626af2222204fca27c0fdabf9eefbfdb638a8a9322b297119f85cce3c708090f0
SHA51289bad552a3c0d8b28550957872561d03bf239d2708d616f21cbf22e58ae749542b07eee00fedac6fdb83c5969f50ea0f56fc103264a164671a94e156f73f160a
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Filesize
536B
MD52ce7e0ff005e81a47de65fff6170e80f
SHA10318040012735b0679dddcb283b999dab065c60e
SHA25612da7208d88613a309a778742e700479d5fe93b7c48cf947d89bbae9d5c3a308
SHA512bd05a1ed58e8b7975c9100c217867678a9f7855e61e7080a45d40c6b91345efd098ee699244fd2ce30cb16eae76074490ed4889e722c4c5304da8fe093e63eca
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Filesize
4KB
MD5c17c31bea83d09d07d8603245833a986
SHA174df3cf3fd7099479b5e0e3136b36dba850b851a
SHA256e84a8d65961fdc01359ed1778be18e7f8fa25e1bde1e9ecdbb3cee548c6e47d6
SHA512f22ad1a301bcaa78cf80944324c81a15c096ea10ecde5104def7ecaafde8d8d49ef07bfc53d2e17d0c2273d3e4f925c55eac7266ebea725acc1de007a2656596