Tool: SeDLL| Names | SeDLL | |
| Category | Malware | |
| Type | Loader | |
| Description | (Proofpoint) This DLL is used for decrypting and executing another JavaScript backdoor such as Orz. The DLL is registered by the installer using regsvr32. The DllRegisterServer export is then called, which performs checks on the commandline parameter. If the string “DR” is passed as an argument, or if the DLL is running in the active session with a username that is not “system”, the final JavaScript backdoor is decoded using a custom base64 alphabet. This backdoor has to be present in the same directory as the dll, with a “.tmp” file extension. The backdoor script is then executed using the IActiveScript and IActiveScriptParse32 COM interfaces. | |
| Information | <https://www.proofpoint.com/us/threat-insight/post/leviathan-espionage-actor-spearphishes-maritime-and-defense-targets> <https://www.fireeye.com/blog/threat-research/2018/03/suspected-chinese-espionage-group-targeting-maritime-and-engineering-industries.html> <https://www.recordedfuture.com/chinese-threat-actor-tempperiscope/> | |
| Malpedia | <https://malpedia.caad.fkie.fraunhofer.de/details/win.sedll> | |
Last change to this tool card: 14 May 2020
Download this tool card in JSON format
| Changed | Name | Country | Observed | ||
APT groups | |||||
| Leviathan, APT 40, TEMP.Periscope |  | 2013-Jan 2020 | |||
1 group listed (1 APT, 0 other, 0 unknown)
|
Thailand Computer Emergency Response Team (ThaiCERT) Follow us on
|
Report incidents |
|
 |
+66 (0)2-123-1234 | |
 |
report@thaicert.or.th | |
 |
Download PGP key | |