2016-05-09 - PSEUDO-DARKLEECH ANGLER EK FROM 185.118.66.154 SENDS BEDEP/CRYPTXXX
ASSOCIATED FILES:
- ZIP archive of the pcaps: 2016-05-09-pseudo-Darkleech-Angler-EK-pcaps.zip 4.4 MB (4,390,349 bytes)
- 2016-05-09-pseudo-Darkleech-Angler-EK-on-a-VM.pcap (780,111 bytes)
- 2016-05-09-pseudo-Darkleech-Angler-EK-on-a-normal-host-sends-Bedep-CryptXXX.pcap (4,114,289 bytes)
- ZIP archive of the malware and artifacts: 2016-05-09-pseudo-Darkleech-Angler-EK-malware-and-artifacts.zip 660.8 kB (660,816 bytes)
- 2016-05-09-CryptXXX-decrypt-instructions.bmp (2,023,254 bytes)
- 2016-05-09-CryptXXX-decrypt-instructions.html (14,193 bytes)
- 2016-05-09-CryptXXX-decrypt-instructions.txt (1,755 bytes)
- 2016-05-09-CryptXXX-ransomware.dll (266,240 bytes)
- 2016-05-09-click-fraud-malware.dll (910,496 bytes)
- 2016-05-09-page-from-justmyvegas.com-with-pseudo-Darkleech-script.txt (16,848 bytes)
- 2016-05-09-pseudo-Darkleech-Angler-EK-flash-exploit.swf (66,870 bytes)
- 2016-05-09-pseudo-Darkleech-Angler-EK-landing-page.txt (169,412 bytes)
NOTES:
- On Friday 2016-04-29, I saw svchost.exe (actually: rundll32.exe) in the same folder as the CryptXXX ransomware. It was used to run the CryptXXX .dll file.
- By Monday 2016-05-02, things were back to normal, with just the CryptXXX .dll file by itself in the folder.
- A week later (Monday 2016-05-09), I see svchost.exe again, dropped in the same folder as the CryptXXX .dll file.
- Today's CryptXXX behavior is slightly different than before, and the decryption instructions are formatted a little differently.
- Today's Click-fraud malware: C:\ProgramData\{9A88E103-A20A-4EA5-8636-C73B709A5BF8}\d3d10.dll
- Today's CryptXXX ransomware: C:\Users\[username]\AppData\Local\Temp\{98D13E48-E0E4-429B-9E7B-633FD7689461}\api-ms-win-system-framebuf-l1-1-0.dll
- Background on the pseudo-Darkleech campaign is available here.
- Proofpoint's blog on Angler EK spreading CryptXXX can be found here.
- An ISC diary I wrote about pseudo-Darkleech causing Angler EK/Bedep/CryptXXX infections is located here.
Shown above: Chain of events for today's infection.
TRAFFIC
Shown above: Pcap of the traffic on a normal host filtered in Wireshark. http.request or (tcp.port eq 443 and tcp.flags eq 0x0002)
Shown above: Pcap of the traffic on a VM filtered in Wireshark. It's good up through the first Bedep post-infection traffic on 82.141.230.141.
After that, Bedep acts differently. You'll see Bedep contacting 95.211.205.228 after Bedep detects it's running on a VM, and it will download different malware.
As usual, no CryptXXX when doing the Angler EK/Bedep infection with a VM, and any click-fraud traffic is a ruse.
@Kafeine discusses this recent change in Bedep behavior here.
ASSOCIATED DOMAINS:
- 185.118.66.154 port 80 - tilewrigbaieru.gt-racer.co.uk - Angler EK
TRAFFIC CAUSED BY BEDEP:
- 82.141.230.141 port 80 - qfsfajslsdexerid.com - POST /blog.php
- 104.193.252.241 port 80 - xqvyvibixozap.com - POST /blog_ajax.php
- 104.193.252.241 port 80 - xqvyvibixozap.com - POST /include/class_bbcode_blog.php
- 104.193.252.241 port 80 - xqvyvibixozap.com - POST /album.php
- 104.193.252.241 port 80 - xqvyvibixozap.com - POST /forumdisplay.php
- 104.193.252.241 port 80 - xqvyvibixozap.com - POST /forumdisplay.php
TRAFFIC CAUSED BY CRYPTXXX:
- 217.23.13.153 port 443 - TCP traffic, custom encoding
- 69.64.33.48 port 443 - TCP traffic, custom encoding
TRAFFIC CAUSED BY CLICK-FRAUD MALWARE:
- 5.199.141.203 port 80 - ranetardinghap.com - GET /adsc.php?sid=1957
- 93.190.141.27 port 80 - cetinhechinhis.com - GET /adsc.php?sid=1957
- 95.211.205.218 port 80 - tedgeroatref.com - GET /adsc.php?sid=1957
- 104.193.252.236 port 80 - rerobloketbo.com - GET /adsc.php?sid=1957
- 162.244.34.11 port 80 - tonthishessici.com - GET /adsc.php?sid=1957
- 188.138.105.185 port 80 - kimpelasomasot.com - GET /adsc.php?sid=1957
IMAGES
Shown above: Start of pseudo-Darkleech script returned from compromised website.
Shown above: Desktop of the Windows host after today's Angler EK/Bedep/CryptXXX infection.
FINAL NOTES
Once again, here are the associated files:
- ZIP archive of the pcaps: 2016-05-09-pseudo-Darkleech-Angler-EK-pcaps.zip 4.4 MB (4,390,349 bytes)
- ZIP archive of the malware and artifacts: 2016-05-09-pseudo-Darkleech-Angler-EK-malware-and-artifacts.zip 660.8 kB (660,816 bytes)
ZIP files are password-protected with the standard password. If you don't know it, look at the "about" page of this website.
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