Analysis
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max time kernel
153s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
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submitted
20-09-2022 05:03
General
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Target
HEUR-Trojan-Ransom.Win32.Encoder.vho-188b2408a0b511905428f95eacc3b60f5c9db195fa8493891baf3db8a4de1e99.exe
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Size
3.4MB
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MD5
35acbf4b0e8cfe8b9c3c2d5da5eb0131
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SHA1
bc2d3b96b8f5d227b41611f64216753a898e804c
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SHA256
188b2408a0b511905428f95eacc3b60f5c9db195fa8493891baf3db8a4de1e99
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SHA512
381f3a0867207e9824a1382620c17d1b445e307512982279a285e7cb4ce2f79a7f48b549d5c78e0f1ef707ff10ec249784a1d6e88788eba1e861f492f19fe2ca
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SSDEEP
98304:NUqA6Sp+ZIogCxfwijqisUzS5Q1J6KtqxxwwpJKILMW:JAOC/MINxxVpEp
Malware Config
Signatures
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Detected LegionLocker ransomware 2 IoCs
Sample contains strings associated with the LegionLocker family.
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LegionLocker
Ransomware family active in 2021.
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Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
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Executes dropped EXE 1 IoCs
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Modifies extensions of user files 11 IoCs
Ransomware generally changes the extension on encrypted files.
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Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
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Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
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Themida packer 4 IoCs
Detects Themida, an advanced Windows software protection system.
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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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Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Kills process with taskkill 1 IoCs
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Suspicious behavior: EnumeratesProcesses 64 IoCs
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Suspicious use of AdjustPrivilegeToken 2 IoCs
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Suspicious use of WriteProcessMemory 9 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\HEUR-Trojan-Ransom.Win32.Encoder.vho-188b2408a0b511905428f95eacc3b60f5c9db195fa8493891baf3db8a4de1e99.exe"C:\Users\Admin\AppData\Local\Temp\HEUR-Trojan-Ransom.Win32.Encoder.vho-188b2408a0b511905428f95eacc3b60f5c9db195fa8493891baf3db8a4de1e99.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\LegionL0cker.exe"C:\Users\Admin\AppData\Local\Temp\LegionL0cker.exe"2⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Executes dropped EXE
- Modifies extensions of user files
- Checks BIOS information in registry
- Checks computer location settings
- Checks whether UAC is enabled
- Drops desktop.ini file(s)
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /k color 47 && taskkill /f /im explorer.exe && Exit3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /f /im explorer.exe4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
3.1MB
MD5d48b80eadbbe9bfb68f3fbe11a6cf0e5
SHA1c099a07b701c1f06709e181481a5938f9b6e001a
SHA2564cfb6842146846fca052d82cc0f80e23c3a7b23bd5958aecfa6a21e28825a1f0
SHA51218aede3c47814d5a53dafaeab24da4a322ac8ed079640938cba4027903c07e524fee6f7746d0fdfc996bc9ad208441c6f11565fe56d603567d7cdefe4f8389ea
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Filesize
3.1MB
MD5d48b80eadbbe9bfb68f3fbe11a6cf0e5
SHA1c099a07b701c1f06709e181481a5938f9b6e001a
SHA2564cfb6842146846fca052d82cc0f80e23c3a7b23bd5958aecfa6a21e28825a1f0
SHA51218aede3c47814d5a53dafaeab24da4a322ac8ed079640938cba4027903c07e524fee6f7746d0fdfc996bc9ad208441c6f11565fe56d603567d7cdefe4f8389ea
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Filesize
8.4MB
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Filesize
8.4MB
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Filesize
1.6MB
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Filesize
8.4MB
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Filesize
8.4MB
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Filesize
1.6MB
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Filesize
40KB
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Filesize
584KB
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Filesize
3.4MB
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Filesize
5.6MB
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