Analysis
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max time kernel
128s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
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submitted
21-01-2024 17:58
General
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Target
6da9c76a6e319c17f1d39e0ae2eaf2af.exe
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Size
669KB
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MD5
6da9c76a6e319c17f1d39e0ae2eaf2af
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SHA1
d8743d22c816de1b1807a64d2bdde6baea838cd0
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SHA256
461f8a55ea2eecfcc26562326af4b56fbaf8e4957a4a6e0b75bec8ee90ace078
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SHA512
70c3e123f887556ac42bb58d730b59d8d2df1cca4d3e895f79fb6cfa5c1a63a64d46bc6fdc23c711be7b966aaf80d2fb7e83f52bdf4c096cbc946f5a6c976db0
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SSDEEP
12288:dQA0FfTcwpBuV2UxqDmuiLZeUaoFi2XZWfGe615HhAZV8DnKD/KeX:Tuf4wTuV2Ux3uIZeUBi2Te6HWmKrKe
Malware Config
Extracted
\Device\HarddiskVolume1\Boot\HOW_TO_RECOVER_DATA.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 (218) 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\6da9c76a6e319c17f1d39e0ae2eaf2af.exe"C:\Users\Admin\AppData\Local\Temp\6da9c76a6e319c17f1d39e0ae2eaf2af.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
MD56da9c76a6e319c17f1d39e0ae2eaf2af
SHA1d8743d22c816de1b1807a64d2bdde6baea838cd0
SHA256461f8a55ea2eecfcc26562326af4b56fbaf8e4957a4a6e0b75bec8ee90ace078
SHA51270c3e123f887556ac42bb58d730b59d8d2df1cca4d3e895f79fb6cfa5c1a63a64d46bc6fdc23c711be7b966aaf80d2fb7e83f52bdf4c096cbc946f5a6c976db0
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Filesize
536B
MD540ae0dfb228adc94cb96e22397cb369e
SHA1184a2124d54b50c8ff736b0e0279a41422c4cf40
SHA2564c14e92f0bc270597fad8950e143a5714b228b72febf88eb7a1bdcb4935e1fcf
SHA512d5639291321e277c4c32a083e551961642e35563392c45ea3ee517108c24a65c77c07d06ca4809e1b43cd73a176e6f65b12d8328019e64e6259f16c482adfc3f
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Filesize
5KB
MD50ca3a13f42c34068e0f757b5994910ee
SHA19f860932035883b9a6f17d234bf62e31759b9c03
SHA2564e72a0afa5834feec43108b99ea35dcf5b45796c1e9e7be398c18fa22aef0ee4
SHA512924a454c7e32eba3701f500a76b4c73219a2d7bbce7db1be7d4eff5aedf8443f592a0d44df1e0f11e2f9588fec45d41d5fe9422f0954b95505f439fd0404134f