Analysis
- max time kernel
146s - max time network
149s - platform
windows10-2004_x64 - resource
win10v2004-20231130-en - resource tags
- submitted
12/12/2023, 17:11
General
- Target tuc5.exe
- Size 7.2MB
- Sample231212-vqaafaaee4
- SHA256 a5d5a11a2774986acdd77d0fc40bd69bab8b40b72817717b60681ac9c946f236
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
-
C:\Users\Admin\AppData\Local\Temp\tuc5.exe"C:\Users\Admin\AppData\Local\Temp\tuc5.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-8KASV.tmp\tuc5.tmp"C:\Users\Admin\AppData\Local\Temp\is-8KASV.tmp\tuc5.tmp" /SL5="$C0226,7269570,121856,C:\Users\Admin\AppData\Local\Temp\tuc5.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\system32\schtasks.exe" /Query3⤵
-
-
C:\Program Files (x86)\numGIF\numgif.exe"C:\Program Files (x86)\numGIF\numgif.exe" -i3⤵
- Executes dropped EXE
-
-
C:\Program Files (x86)\numGIF\numgif.exe"C:\Program Files (x86)\numGIF\numgif.exe" -s3⤵
- Executes dropped EXE
-
-
C:\Windows\SysWOW64\net.exe"C:\Windows\system32\net.exe" helpmsg 123⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\net1.exeC:\Windows\system32\net1 helpmsg 124⤵
-
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
numgif.exe
numgif.exe
numgif.exe
tuc5.tmp
_iscrypt.dll
_isdecmp.dll
memory/208-7-0x0000000000680000-0x0000000000681000-memory.dmp
memory/208-163-0x0000000000680000-0x0000000000681000-memory.dmp
memory/208-161-0x0000000000400000-0x00000000004BC000-memory.dmp
memory/2908-2-0x0000000000400000-0x0000000000425000-memory.dmp
memory/2908-0-0x0000000000400000-0x0000000000425000-memory.dmp
memory/2908-160-0x0000000000400000-0x0000000000425000-memory.dmp
memory/3796-186-0x0000000000400000-0x0000000000629000-memory.dmp
memory/3796-189-0x0000000000400000-0x0000000000629000-memory.dmp
memory/3796-159-0x0000000000400000-0x0000000000629000-memory.dmp
memory/3796-208-0x0000000000400000-0x0000000000629000-memory.dmp
memory/3796-205-0x0000000000400000-0x0000000000629000-memory.dmp
memory/3796-162-0x0000000000400000-0x0000000000629000-memory.dmp
memory/3796-202-0x0000000000400000-0x0000000000629000-memory.dmp
memory/3796-166-0x0000000000400000-0x0000000000629000-memory.dmp
memory/3796-167-0x0000000000400000-0x0000000000629000-memory.dmp
memory/3796-170-0x0000000000400000-0x0000000000629000-memory.dmp
memory/3796-173-0x0000000000400000-0x0000000000629000-memory.dmp
memory/3796-176-0x0000000000400000-0x0000000000629000-memory.dmp
memory/3796-179-0x0000000000780000-0x000000000081E000-memory.dmp
memory/3796-180-0x0000000000400000-0x0000000000629000-memory.dmp
memory/3796-183-0x0000000000780000-0x000000000081E000-memory.dmp
memory/3796-199-0x0000000000400000-0x0000000000629000-memory.dmp
memory/3796-157-0x0000000000400000-0x0000000000629000-memory.dmp
memory/3796-190-0x0000000000780000-0x000000000081E000-memory.dmp
memory/3796-193-0x0000000000400000-0x0000000000629000-memory.dmp
memory/3796-196-0x0000000000400000-0x0000000000629000-memory.dmp
memory/5028-152-0x0000000000400000-0x0000000000629000-memory.dmp
memory/5028-151-0x0000000000400000-0x0000000000629000-memory.dmp
memory/5028-155-0x0000000000400000-0x0000000000629000-memory.dmp
memory/5028-154-0x0000000000400000-0x0000000000629000-memory.dmp