Analysis
- max time kernel
144s - max time network
149s - platform
windows7_x64 - resource
win7-20231129-en - resource tags
- submitted
11/12/2023, 16:52
General
- Target tuc3.exe
- Size 7.6MB
- Sample231211-vdd3vscebp
- SHA256 17d9663dcac0b28d8429c07158c882d93a44597249c4e5c55f826c2b892b0531
Malware Config
Signatures
- Executes dropped EXE 3 IoCs
- Loads dropped DLL 6 IoCs
- Unexpected DNS network traffic destination 2 IoCs
Network traffic to other servers than the configured DNS servers was detected on the DNS port.
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Drops file in Program Files directory 63 IoCs
- Runs net.exe
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of WriteProcessMemory 27 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\tuc3.exe"C:\Users\Admin\AppData\Local\Temp\tuc3.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-JB0GS.tmp\tuc3.tmp"C:\Users\Admin\AppData\Local\Temp\is-JB0GS.tmp\tuc3.tmp" /SL5="$4001C,7715663,68096,C:\Users\Admin\AppData\Local\Temp\tuc3.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
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C:\Program Files (x86)\PlayGIF\gifplayer.exe"C:\Program Files (x86)\PlayGIF\gifplayer.exe" -i3⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\system32\schtasks.exe" /Query3⤵
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C:\Program Files (x86)\PlayGIF\gifplayer.exe"C:\Program Files (x86)\PlayGIF\gifplayer.exe" -s3⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\net.exe"C:\Windows\system32\net.exe" helpmsg 113⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\net1.exeC:\Windows\system32\net1 helpmsg 111⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
gifplayer.exe
gifplayer.exe
gifplayer.exe
tuc3.tmp
tuc3.tmp
gifplayer.exe
_iscrypt.dll
_isdecmp.dll
_shfoldr.dll
tuc3.tmp
memory/940-153-0x0000000000400000-0x000000000068F000-memory.dmp
memory/940-158-0x0000000000400000-0x000000000068F000-memory.dmp
memory/940-157-0x0000000000400000-0x000000000068F000-memory.dmp
memory/940-154-0x0000000000400000-0x000000000068F000-memory.dmp
memory/1216-164-0x0000000000400000-0x00000000004BC000-memory.dmp
memory/1216-166-0x00000000001D0000-0x00000000001D1000-memory.dmp
memory/1216-152-0x0000000003770000-0x00000000039FF000-memory.dmp
memory/1216-19-0x00000000001D0000-0x00000000001D1000-memory.dmp
memory/1216-169-0x0000000003770000-0x00000000039FF000-memory.dmp
memory/2360-0-0x0000000000400000-0x0000000000418000-memory.dmp
memory/2360-2-0x0000000000400000-0x0000000000418000-memory.dmp
memory/2360-163-0x0000000000400000-0x0000000000418000-memory.dmp
memory/2804-174-0x0000000000400000-0x000000000068F000-memory.dmp
memory/2804-184-0x00000000026D0000-0x000000000276E000-memory.dmp
memory/2804-162-0x0000000000400000-0x000000000068F000-memory.dmp
memory/2804-170-0x0000000000400000-0x000000000068F000-memory.dmp
memory/2804-171-0x0000000000400000-0x000000000068F000-memory.dmp
memory/2804-160-0x0000000000400000-0x000000000068F000-memory.dmp
memory/2804-177-0x0000000000400000-0x000000000068F000-memory.dmp
memory/2804-180-0x0000000000400000-0x000000000068F000-memory.dmp
memory/2804-183-0x0000000000400000-0x000000000068F000-memory.dmp
memory/2804-165-0x0000000000400000-0x000000000068F000-memory.dmp
memory/2804-189-0x0000000000400000-0x000000000068F000-memory.dmp
memory/2804-192-0x0000000000400000-0x000000000068F000-memory.dmp
memory/2804-195-0x00000000026D0000-0x000000000276E000-memory.dmp
memory/2804-196-0x0000000000400000-0x000000000068F000-memory.dmp
memory/2804-199-0x0000000000400000-0x000000000068F000-memory.dmp
memory/2804-202-0x0000000000400000-0x000000000068F000-memory.dmp
memory/2804-205-0x0000000000400000-0x000000000068F000-memory.dmp
memory/2804-208-0x0000000000400000-0x000000000068F000-memory.dmp
memory/2804-211-0x0000000000400000-0x000000000068F000-memory.dmp