Resubmissions
15-03-2024 10:54
240315-mz23tagg69 10Analysis
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max time kernel
146s -
max time network
129s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
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submitted
15-03-2024 10:54
General
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Target
txt.exe
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Size
885KB
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MD5
497ef4779c6770e4497adf0bc71655f1
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SHA1
328a8793323f11c1d0c5f3ddedf4ae10caafb063
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SHA256
62e63388953bb30669b403867a3ac2c8130332cf78133f7fd4a7f23cdc939087
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SHA512
35c2c131a84205ecda974fc0cdf93db38184547586c28671379b13b98311289459b5b87c6c8ffa3233ccd42953d4faef47e27195ecd40011cc72cbf3b3e5af35
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SSDEEP
24576:pAWf/LUup7zmMl8tOKnvwYQ62jaeekMEoBmn64:pTUS2Ml8trnvwYQ62japkMEQS64
Malware Config
Extracted
C:\Program Files\instructions_read_me.txt
blackbasta
https://bastad5huzwkepdixedg2gekg7jk22ato24zyllp6lnjx7wdtyctgvyd.onion/
Signatures
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Black Basta
A ransomware family targeting Windows and Linux ESXi first seen in February 2022.
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Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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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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Adds Run key to start application 2 TTPs 1 IoCs
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Drops desktop.ini file(s) 1 IoCs
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Drops file in Program Files directory 64 IoCs
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Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
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Modifies Internet Explorer settings 1 TTPs 10 IoCs
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Modifies registry class 64 IoCs
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Suspicious behavior: EnumeratesProcesses 2 IoCs
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Suspicious use of AdjustPrivilegeToken 3 IoCs
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Suspicious use of SetWindowsHookEx 6 IoCs
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Suspicious use of WriteProcessMemory 5 IoCs
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Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
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C:\Users\Admin\AppData\Local\Temp\txt.exe"C:\Users\Admin\AppData\Local\Temp\txt.exe"1⤵
- Adds Run key to start application
- Drops desktop.ini file(s)
- Drops file in Program Files directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\vssadmin.exeC:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet3⤵
- Interacts with shadow copies
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe"C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
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C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe"C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca1⤵
- Modifies Internet Explorer settings
- Modifies registry class
- Suspicious use of SetWindowsHookEx
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C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe"C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca1⤵
- Modifies Internet Explorer settings
- Modifies registry class
- Suspicious use of SetWindowsHookEx
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C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe"C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca1⤵
- Modifies Internet Explorer settings
- Modifies registry class
- Suspicious use of SetWindowsHookEx
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C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe"C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca1⤵
- Modifies Internet Explorer settings
- Modifies registry class
- Suspicious use of SetWindowsHookEx
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C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe"C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca1⤵
- Modifies Internet Explorer settings
- Modifies registry class
- Suspicious use of SetWindowsHookEx
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C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe"C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca1⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
1KB
MD548fd4f0bdadd9e2a934c4aef789f7e13
SHA17e5c99a356f4fac0b9e538f8a2a8927d1c0c6850
SHA256f1e74dfde27137949c2352cb782ed6b2d5cf5fcd2ad6fc1f6e91f2f89649e29e
SHA51217ac0d35284095eea40c68a7d1ac2fb0eb7d19b429ffc072a4b4504a8b80ba7297958cf205a176fd3c651d18f8ba01e2b41f3155715c9e20a34b474e36cc4cb2
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Filesize
97B
MD5fb9854a5b056cc3d006b38bf0eab1b7c
SHA10a2b0432e2e9938be1f652c2247827e47b265f44
SHA2563d454d15255bb82fb8a4cfa40ea848af32395be899aaaf83b6d626a814aa21c2
SHA51220366182bf5a658b19e3df4eef2fa4e484bdcecc85a893834fbcb2b0ab64100a7694c3dbbdf1597bf3e3a747ede6fe7b81aab5f07653ef40a515edbef90ed00d
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Filesize
128KB
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Filesize
128KB
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Filesize
128KB
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Filesize
128KB
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Filesize
128KB
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Filesize
128KB
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Filesize
128KB
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Filesize
128KB
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Filesize
128KB
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Filesize
128KB
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Filesize
128KB
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Filesize
128KB
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Filesize
128KB
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Filesize
128KB
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Filesize
128KB