Analysis
- max time kernel
149s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20231130-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 3 IoCs
- Unexpected DNS network traffic destination 3 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 18 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\tuc3.exe"C:\Users\Admin\AppData\Local\Temp\tuc3.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-5M8DR.tmp\tuc3.tmp"C:\Users\Admin\AppData\Local\Temp\is-5M8DR.tmp\tuc3.tmp" /SL5="$4020A,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:\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" -i3⤵
- Executes dropped EXE
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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 114⤵
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
gifplayer.exe
gifplayer.exe
gifplayer.exe
tuc3.tmp
tuc3.tmp
_iscrypt.dll
_isdecmp.dll
memory/516-154-0x0000000000400000-0x000000000068F000-memory.dmp
memory/516-151-0x0000000000400000-0x000000000068F000-memory.dmp
memory/516-152-0x0000000000400000-0x000000000068F000-memory.dmp
memory/516-155-0x0000000000400000-0x000000000068F000-memory.dmp
memory/2056-7-0x0000000000580000-0x0000000000581000-memory.dmp
memory/2056-161-0x0000000000400000-0x00000000004BC000-memory.dmp
memory/2056-163-0x0000000000580000-0x0000000000581000-memory.dmp
memory/2900-2-0x0000000000400000-0x0000000000418000-memory.dmp
memory/2900-0-0x0000000000400000-0x0000000000418000-memory.dmp
memory/2900-160-0x0000000000400000-0x0000000000418000-memory.dmp
memory/5092-162-0x0000000000400000-0x000000000068F000-memory.dmp
memory/5092-180-0x0000000000960000-0x00000000009FE000-memory.dmp
memory/5092-157-0x0000000000400000-0x000000000068F000-memory.dmp
memory/5092-166-0x0000000000400000-0x000000000068F000-memory.dmp
memory/5092-167-0x0000000000400000-0x000000000068F000-memory.dmp
memory/5092-170-0x0000000000400000-0x000000000068F000-memory.dmp
memory/5092-173-0x0000000000400000-0x000000000068F000-memory.dmp
memory/5092-176-0x0000000000400000-0x000000000068F000-memory.dmp
memory/5092-179-0x0000000000400000-0x000000000068F000-memory.dmp
memory/5092-159-0x0000000000400000-0x000000000068F000-memory.dmp
memory/5092-185-0x0000000000400000-0x000000000068F000-memory.dmp
memory/5092-188-0x0000000000400000-0x000000000068F000-memory.dmp
memory/5092-189-0x0000000000960000-0x00000000009FE000-memory.dmp
memory/5092-192-0x0000000000400000-0x000000000068F000-memory.dmp
memory/5092-195-0x0000000000400000-0x000000000068F000-memory.dmp
memory/5092-198-0x0000000000400000-0x000000000068F000-memory.dmp
memory/5092-201-0x0000000000400000-0x000000000068F000-memory.dmp
memory/5092-204-0x0000000000400000-0x000000000068F000-memory.dmp
memory/5092-207-0x0000000000400000-0x000000000068F000-memory.dmp