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kb08237819.exe

The executable kb08237819.exe has been detected as malware by 2 anti-virus scanners. This trojan will attemp to establish a connection to a remote server through various TCP ports and will use Winlogon to survive reboots. While running, it connects to the Internet address customer.worldstream.nl on port 5500.
MD5:
4fe52bb0655b40dc69827880fe070216

SHA-1:
d63a196e1a18507b539c7e02295e39a1f3c9be10

SHA-256:
c9cc44e7e829b59b041453e713cc7fae5315fe9516ab56796ede7f4822d528b5

Scanner detections:
2 / 68

Status:
Malware

Analysis date:
12/27/2024 2:12:27 AM UTC  (today)

Scan engine
Detection
Engine version

Microsoft Security Essentials
Trojan:Win32/Lethic.B
1.233.3738.0

Reason Heuristics
Trojan.Proxy
17.1.5.16

File size:
137 KB (140,288 bytes)

File type:
Executable application (Win32 EXE)

Common path:
C:\users\{user}\appdata\local\temp\kb08237819.exe

File PE Metadata
Compilation timestamp:
12/30/2016 9:53:11 PM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
9.0

Entry address:
0x34DF

Entry point:
E8, 9F, 68, 00, 00, E9, 16, FE, FF, FF, 8B, 44, 24, 04, 56, 33, F6, 3B, C6, 75, 1D, E8, 09, 02, 00, 00, 56, 56, 56, 56, 56, C7, 00, 16, 00, 00, 00, E8, 9A, 01, 00, 00, 83, C4, 14, 6A, 16, 58, 5E, C3, 8B, 0D, 14, 10, 42, 00, 89, 08, 33, C0, 5E, C3, 8B, 44, 24, 04, 56, 33, F6, 3B, C6, 75, 1D, E8, D5, 01, 00, 00, 56, 56, 56, 56, 56, C7, 00, 16, 00, 00, 00, E8, 66, 01, 00, 00, 83, C4, 14, 6A, 16, 58, 5E, C3, 8B, 0D, 18, 10, 42, 00, 89, 08, 33, C0, 5E, C3, 8B, 44, 24, 04, 56, 33, F6, 3B, C6, 75, 1D, E8, A1, 01...
 
[+]

Entropy:
6.5480

Code size:
68 KB (69,632 bytes)

The executing file has been seen to make the following network communications in live environments.

TCP:
Connects to customer.worldstream.nl  (109.236.87.85:5500)

TCP (HTTP):
Connects to omegle.com  (107.6.108.5:80)

TCP (HTTP SSL):
Connects to ec2-52-196-205-254.ap-northeast-1.compute.amazonaws.com  (52.196.205.254:443)

TCP (HTTP):
Connects to ec2-184-72-248-171.compute-1.amazonaws.com  (184.72.248.171:80)

TCP (HTTP SSL):
Connects to msnbot-65-52-108-76.search.msn.com  (65.52.108.76:443)

TCP (SMTP):
Connects to bay0-mc6-f.bay0.hotmail.com  (207.46.8.199:25)

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