Analysis
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max time kernel
150s -
max time network
120s -
platform
windows7_x64 -
resource
win7-20230712-en -
resource tags
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submitted
14-08-2023 13:51
General
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Target
Fast.exe
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Size
56KB
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MD5
c0edb05bd1e26666764757e7d6f6f09b
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SHA1
330139df4594f4070ada6c89ec3d0a16abe14497
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SHA256
c29630324d768c6e40b814164f6c2c6f33dd741392edc940cc852e67e1667a57
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SHA512
f172c38d5d169523c56d5c551749c9b8bf6d1452b0c64666651757f46546ffe8bd445935b88faf16dc381a13a6b12a71934fef6c9fa434ee5974d0d3499d1790
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SSDEEP
1536:gNeRBl5PT/rx1mzwRMSTdLpJ3obxhYPQg:gQRrmzwR5JfPQ
Malware Config
Extracted
C:\info.hta
class='mark'>[email protected]</span></div>
http://www.w3.org/TR/html4/strict.dtd'>
Extracted
C:\Users\Admin\Desktop\info.hta
Signatures
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Phobos
Phobos ransomware appeared at the beginning of 2019.
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Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Modifies boot configuration data using bcdedit 1 TTPs 4 IoCs
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Renames multiple (317) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Deletes backup catalog 3 TTPs 2 IoCs
Uses wbadmin.exe to inhibit system recovery.
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Modifies Windows Firewall 1 TTPs 2 IoCs
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Drops startup file 3 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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Adds Run key to start application 2 TTPs 2 IoCs
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Drops desktop.ini file(s) 64 IoCs
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Drops file in Program Files directory 64 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Interacts with shadow copies 2 TTPs 2 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
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Modifies Internet Explorer settings 1 TTPs 4 IoCs
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Suspicious behavior: EnumeratesProcesses 64 IoCs
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Suspicious use of AdjustPrivilegeToken 64 IoCs
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Suspicious use of WriteProcessMemory 64 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\Fast.exe"C:\Users\Admin\AppData\Local\Temp\Fast.exe"1⤵
- Drops startup file
- Adds Run key to start application
- Drops desktop.ini file(s)
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\Fast.exe"C:\Users\Admin\AppData\Local\Temp\Fast.exe"2⤵
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C:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\netsh.exenetsh advfirewall set currentprofile state off3⤵
- Modifies Windows Firewall
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C:\Windows\system32\netsh.exenetsh firewall set opmode mode=disable3⤵
- Modifies Windows Firewall
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C:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet3⤵
- Interacts with shadow copies
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete3⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures3⤵
- Modifies boot configuration data using bcdedit
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no3⤵
- Modifies boot configuration data using bcdedit
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C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet3⤵
- Deletes backup catalog
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C:\Windows\SysWOW64\mshta.exe"C:\Windows\SysWOW64\mshta.exe" "C:\Users\Admin\Desktop\info.hta"2⤵
- Modifies Internet Explorer settings
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C:\Windows\SysWOW64\mshta.exe"C:\Windows\SysWOW64\mshta.exe" "C:\users\public\desktop\info.hta"2⤵
- Modifies Internet Explorer settings
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C:\Windows\SysWOW64\mshta.exe"C:\Windows\SysWOW64\mshta.exe" "C:\info.hta"2⤵
- Modifies Internet Explorer settings
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C:\Windows\SysWOW64\mshta.exe"C:\Windows\SysWOW64\mshta.exe" "F:\info.hta"2⤵
- Modifies Internet Explorer settings
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C:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet3⤵
- Interacts with shadow copies
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete3⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures3⤵
- Modifies boot configuration data using bcdedit
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no3⤵
- Modifies boot configuration data using bcdedit
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C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet3⤵
- Deletes backup catalog
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
24.4MB
MD55a41d1fefb6798bb253258c5082359e8
SHA1a654ed6a89eba69847a97026445979c79dbfd9bb
SHA2562ef46e043ff278a8fe5ed12ccab2e86f5b4121231c7e34311a623ceed80de8a0
SHA51200dbf9a24d42f4160fa0d0aa00c0b3b0f41f7c8f7d78719452a62ee49a65a523b2b5464a6366d7218c0af497b9f4856647066a2a78d9039abcc1ea6855a34883
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Filesize
5KB
MD56db74a92f77a30f9b824f7735b374c11
SHA1f3c7f00b74b21d16f001657c052d06343d2a9662
SHA256a40816044ab4b8b6f68969d68ed2172d86393a65e2d0142dd65ab3a2c94523f0
SHA512071348e23d10daed2e69844efca0b91ad42c8acf13f7af0151185ec6ee1ab7c17a4e79c24f2b59f9642431cc69218a463d82a8ca63e8932367178dd7a13ea32d
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Filesize
5KB
MD56db74a92f77a30f9b824f7735b374c11
SHA1f3c7f00b74b21d16f001657c052d06343d2a9662
SHA256a40816044ab4b8b6f68969d68ed2172d86393a65e2d0142dd65ab3a2c94523f0
SHA512071348e23d10daed2e69844efca0b91ad42c8acf13f7af0151185ec6ee1ab7c17a4e79c24f2b59f9642431cc69218a463d82a8ca63e8932367178dd7a13ea32d
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Filesize
5KB
MD56db74a92f77a30f9b824f7735b374c11
SHA1f3c7f00b74b21d16f001657c052d06343d2a9662
SHA256a40816044ab4b8b6f68969d68ed2172d86393a65e2d0142dd65ab3a2c94523f0
SHA512071348e23d10daed2e69844efca0b91ad42c8acf13f7af0151185ec6ee1ab7c17a4e79c24f2b59f9642431cc69218a463d82a8ca63e8932367178dd7a13ea32d
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Filesize
5KB
MD56db74a92f77a30f9b824f7735b374c11
SHA1f3c7f00b74b21d16f001657c052d06343d2a9662
SHA256a40816044ab4b8b6f68969d68ed2172d86393a65e2d0142dd65ab3a2c94523f0
SHA512071348e23d10daed2e69844efca0b91ad42c8acf13f7af0151185ec6ee1ab7c17a4e79c24f2b59f9642431cc69218a463d82a8ca63e8932367178dd7a13ea32d
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Filesize
5KB
MD56db74a92f77a30f9b824f7735b374c11
SHA1f3c7f00b74b21d16f001657c052d06343d2a9662
SHA256a40816044ab4b8b6f68969d68ed2172d86393a65e2d0142dd65ab3a2c94523f0
SHA512071348e23d10daed2e69844efca0b91ad42c8acf13f7af0151185ec6ee1ab7c17a4e79c24f2b59f9642431cc69218a463d82a8ca63e8932367178dd7a13ea32d