1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
/*
This Yara ruleset is under the GNU-GPLv2 license (http://www.gnu.org/licenses/gpl-2.0.html) and open to any user or organization, as long as you use it under this license.
*/
/*
Yara Rule Set
Author: Florian Roth
Date: 2015-09-03
Identifier: Carbanak Rules
*/
/* Rule Set ----------------------------------------------------------------- */
rule Carbanak_0915_1
{
meta:
description = "Carbanak Malware"
author = "Florian Roth"
reference = "https://www.csis.dk/en/csis/blog/4710/"
date = "2015-09-03"
score = 70
strings:
$s1 = "evict1.pdb" fullword ascii
$s2 = "http://testing.corp 0" fullword ascii
condition:
uint16(0) == 0x5a4d and filesize < 100KB and 1 of them
}
rule Carbanak_0915_2
{
meta:
description = "Carbanak Malware"
author = "Florian Roth"
reference = "https://www.csis.dk/en/csis/blog/4710/"
date = "2015-09-03"
score = 70
strings:
$x1 = "8Rkzy.exe" fullword wide
$s1 = "Export Template" fullword wide
$s2 = "Session folder with name '%s' already exists." fullword ascii
$s3 = "Show Unconnected Endpoints (Ctrl+U)" fullword ascii
$s4 = "Close All Documents" fullword wide
$s5 = "Add &Resource" fullword ascii
$s6 = "PROCEXPLORER" fullword wide /* Goodware String - occured 1 times */
$s7 = "AssocQueryKeyA" fullword ascii /* Goodware String - occured 4 times */
condition:
uint16(0) == 0x5a4d and filesize < 500KB and ( $x1 or all of ($s*) )
}
rule Carbanak_0915_3
{
meta:
description = "Carbanak Malware"
author = "Florian Roth"
reference = "https://www.csis.dk/en/csis/blog/4710/"
date = "2015-09-03"
score = 70
strings:
$s1 = "wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww" fullword ascii
$s2 = "SHInvokePrinterCommandA" fullword ascii
$s3 = "Ycwxnkaj" fullword ascii
condition:
uint16(0) == 0x5a4d and filesize < 700KB and all of them
}