Analysis
- max time kernel
148s - max time network
137s - platform
windows7_x64 - resource
win7-20231215-en - resource tags
- submitted
02/01/2024, 23:51
General
- Target tuc6.exe
- Size 4.4MB
- Sample240102-3v5wxaede2
- SHA256 3d106114b04dfc52f4f90ac77925e9ccb455b486ac7d7b3d8a53d29568dfdadd
Malware Config
Signatures
- Executes dropped EXE 3 IoCs
- Loads dropped DLL 6 IoCs
- Unexpected DNS network traffic destination 1 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 50 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of WriteProcessMemory 15 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\tuc6.exe"C:\Users\Admin\AppData\Local\Temp\tuc6.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-1T1UB.tmp\tuc6.tmp"C:\Users\Admin\AppData\Local\Temp\is-1T1UB.tmp\tuc6.tmp" /SL5="$8011E,4321348,54272,C:\Users\Admin\AppData\Local\Temp\tuc6.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
-
C:\Program Files (x86)\Java FAX Extension Class\javafax.exe"C:\Program Files (x86)\Java FAX Extension Class\javafax.exe" -i3⤵
- Executes dropped EXE
-
-
C:\Program Files (x86)\Java FAX Extension Class\javafax.exe"C:\Program Files (x86)\Java FAX Extension Class\javafax.exe" -s3⤵
- Executes dropped EXE
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
javafax.exe
tuc6.tmp
_iscrypt.dll
_isdecmp.dll
_shfoldr.dll
memory/1652-126-0x0000000000400000-0x000000000053A000-memory.dmp
memory/1652-130-0x0000000000400000-0x000000000053A000-memory.dmp
memory/1652-127-0x0000000000400000-0x000000000053A000-memory.dmp
memory/2412-138-0x00000000034D0000-0x000000000360A000-memory.dmp
memory/2412-137-0x0000000000240000-0x0000000000241000-memory.dmp
memory/2412-8-0x0000000000240000-0x0000000000241000-memory.dmp
memory/2412-123-0x00000000034D0000-0x000000000360A000-memory.dmp
memory/2412-135-0x0000000000400000-0x00000000004BC000-memory.dmp
memory/2432-134-0x0000000000400000-0x0000000000414000-memory.dmp
memory/2432-1-0x0000000000400000-0x0000000000414000-memory.dmp
memory/2864-149-0x0000000000400000-0x000000000053A000-memory.dmp
memory/2864-156-0x0000000002510000-0x00000000025AF000-memory.dmp
memory/2864-141-0x0000000000400000-0x000000000053A000-memory.dmp
memory/2864-142-0x0000000000400000-0x000000000053A000-memory.dmp
memory/2864-145-0x0000000000400000-0x000000000053A000-memory.dmp
memory/2864-146-0x0000000000400000-0x000000000053A000-memory.dmp
memory/2864-133-0x0000000000400000-0x000000000053A000-memory.dmp
memory/2864-152-0x0000000000400000-0x000000000053A000-memory.dmp
memory/2864-155-0x0000000000400000-0x000000000053A000-memory.dmp
memory/2864-136-0x0000000000400000-0x000000000053A000-memory.dmp
memory/2864-161-0x0000000000400000-0x000000000053A000-memory.dmp
memory/2864-164-0x0000000000400000-0x000000000053A000-memory.dmp
memory/2864-167-0x0000000002510000-0x00000000025AF000-memory.dmp
memory/2864-168-0x0000000000400000-0x000000000053A000-memory.dmp
memory/2864-171-0x0000000000400000-0x000000000053A000-memory.dmp
memory/2864-174-0x0000000000400000-0x000000000053A000-memory.dmp
memory/2864-177-0x0000000000400000-0x000000000053A000-memory.dmp
memory/2864-181-0x0000000000400000-0x000000000053A000-memory.dmp
memory/2864-184-0x0000000000400000-0x000000000053A000-memory.dmp