Does anyone have information on a IRC Trojan with the
following characteristics.
Opens IRC channels on 6667 and connects to some IRC
channel on 6668.
It sets a registry key
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Default
web browser = "c:\winnt\system32\iexplore.exe"
And changes the shell
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\Winlogon\Shell
changes it from "Explorer.exe" to "Explorer.exe
iexplore.exe"
I found a 9 KB file named iexplore.exe in
c:\winnt\system32 and also found the iexplore.exe
process running.
Norton Antivirus did not catch the Trojan
Here is some of the network traffic
Frame Time Src MAC Addr Dst MAC Addr Protocol
Description
Src Other Addr Dst Other Addr Type Other
Addr
110 5.159 G7SUJ NICSRV01 TCP
.AP..., len: 26, seq: 67030892-67030917,
ack:3550877285, win: G7SUJ 209.116.7.97
IP
+ FRAME: Base frame properties
+ ETHERNET: ETYPE = 0x0800 : Protocol = IP: DOD
Internet Protocol
+ IP: ID = 0x612A; Proto = TCP; Len: 66
page 31
Network Monitor trace Fri 10/19/01 07:47:37
trojan.TXT
+ TCP: .AP..., len: 26, seq: 67030892-67030917,
ack:3550877285, win: 8280, src: 8184 dst: 6668
00000: 00 00 0C 07 AC 47 00 B0 D0 1A 49 5C 08 00 45
00 .....G....I\..E.
00010: 00 42 61 2A 00 00 80 06 AF D9 0A 68 46 75 D1
74 .Ba*.......hFu.t
00020: 07 61 1F F8 1A 0C 03 FE CF 6C D3 A6 16 65 50
18 .a.......l...eP.
00030: 20 58 0F CE 00 00 55 53 45 52 20 63 68 78 76
20 X....USER chxv
00040: 69 78 64 6F 20 70 6E 6A 68 20 3A 61 64 6F 61
0A ixdo pnjh :adoa.
Frame Time Src MAC Addr Dst MAC Addr Protocol
Description
Src Other Addr Dst Other Addr Type Other
Addr
113 5.214 0004DD749F42 G7SUJ TCP
.AP..., len: 68, seq:3550877285-3550877352, ack:
67030892, win 209.116.7.97 G7SUJ IP
+ FRAME: Base frame properties
+ ETHERNET: ETYPE = 0x0800 : Protocol = IP: DOD
Internet Protocol
+ IP: ID = 0x8DED; Proto = TCP; Len: 108
+ TCP: .AP..., len: 68, seq:3550877285-3550877352,
ack: 67030892, win: 4140, src: 6668 dst: 8184
00000: 00 B0 D0 1A 49 5C 00 04 DD 74 9F 42 08 00 45
00 ....I\...t.B..E.
00010: 00 6C 8D ED 40 00 2E 06 94 EC D1 74 07 61 0A
68 .l..@......t.a.h
00020: 46 75 1A 0C 1F F8 D3 A6 16 65 03 FE CF 6C 50
18 Fu.......e...lP.
00030: 10 2C B2 D6 00 00 3A 64 72 61 67 6F 6E 73 2E
67 .,....:dragons.g
00040: 61 2E 75 73 2E 64 61 6C 2E 6E 65 74 20 4E 4F
54 a.us.dal.net NOT
Frame Time Src MAC Addr Dst MAC Addr Protocol
Description
Src Other Addr Dst Other Addr Type Other
Addr
127 5.516 G7SUJ NICSRV01 TCP
.AP..., len: 32, seq: 67030928-67030959,
ack:3550879444, win: G7SUJ 209.116.7.97
IP
+ FRAME: Base frame properties
+ ETHERNET: ETYPE = 0x0800 : Protocol = IP: DOD
Internet Protocol
+ IP: ID = 0x692A; Proto = TCP; Len: 72
+ TCP: .AP..., len: 32, seq: 67030928-67030959,
ack:3550879444, win: 8280, src: 8184 dst: 6668
00000: 00 00 0C 07 AC 47 00 B0 D0 1A 49 5C 08 00 45
00 .....G....I\..E.
00010: 00 48 69 2A 00 00 80 06 A7 D3 0A 68 46 75 D1
74 .Hi*.......hFu.t
00020: 07 61 1F F8 1A 0C 03 FE CF 90 D3 A6 1E D4 50
18 .a............P.
00030: 20 58 76 C4 00 00 4A 4F 49 4E 20 23 77 68 6F
7A Xv...JOIN #whoz
00040: 79 65 72 64 61 64 64 79 20 72 61 74 70 61 63
6B yerdaddy ratpack
I know that I will need to rebuild the machine, but
does anyone have experience with this one? I looked
at the Run key a number of times before I realized the
Default Web Browser key doesn't fit in.
Mike
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Received on Oct 19 2001
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