YARA · Signature Base (Florian Roth / Nextron)
SIGNATURE_BASE_APT_MAL_SLOTHFULMEDIA_Oct20_1
Detects SLOTHFULMEDIA malware
- Autor
- Florian Roth (Nextron Systems)
- Datum
- 2020-10-01
- Geändert
- 2023-12-05
- Score / Qualität
- 75 / 85
Was diese Regel erkennt
Detects SLOTHFULMEDIA malware
Zugehörige Malware-Familie: Slothfulmedia.
Ziele: Windows-PE.
Sie definiert 11 Muster (6 Text, 5 Hex, 0 Regex).
Zusammenfassung aus den Metadaten und der Bedingung der Regel erzeugt.
Regelquelltext
rule SIGNATURE_BASE_APT_MAL_SLOTHFULMEDIA_Oct20_1 : FILE
{
meta:
= "Detects SLOTHFULMEDIA malware"
= "Florian Roth (Nextron Systems)"
= "cc413225-f084-5859-bc27-04eb018d8894"
= "2020-10-01"
= "2023-12-05"
= "https://us-cert.cisa.gov/ncas/analysis-reports/ar20-275a"
= "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/apt_iamtheking.yar#L2-L48"
= "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
= "64d78eec46c9ddd4b9a366de62ba0f2813267dc4393bc79e4c9a51a9bb7e6273"
= "927d945476191a3523884f4c0784fb71c16b7738bd7f2abd1e3a198af403f0ae"
= "f0503f0131040b805e106eafe64a65d9404a0e279f052237b868e456c34d36e6"
= "ed5258306c06d6fac9b13c99c7c8accc7f7fa0de4cf4de4f7d9eccad916555f5"
= "04ca010f4c8997a023fabacae230698290e3ff918a86703c5e0a2a6983b039eb"
= "cb2adcaaa25bb6b8a9f1c685c219f8d6d78aa5cfd65c633f4d255ff81da2c517"
= "e50bda40eb05767e0903c3d8dd62b4e0290d89740c82c8b7f391d5763dc35156"
= 75
= 85
= "FILE"
strings:
$xc1 = { 25 73 26 69 3D 25 64 00 48 54 54 50 2F 31 2E 31
00 00 00 00 50 4F 53 54 00 00 00 00 43 6F 6E 74
65 6E 74 2D 4C 65 6E 67 74 68 3A 20 25 64 00 00
5C 00 53 00 65 00 74 00 75 00 70 00 55 00 69 00
00 00 00 00 25 00 73 00 25 00 73 00 5F 00 25 00
64 00 2E 00 64 00 61 00 74 }
$xc2 = { 2F 76 3F 6D 3D 00 00 00 35 30 31 00 32 30 30 00
2A 00 2E 00 2A 00 00 00 25 00 73 00 00 00 00 00
53 00 65 00 44 00 65 00 62 00 75 00 67 00 50 00
72 00 69 00 76 00 69 00 6C 00 65 00 67 00 65 }
$xc3 = { 00 25 00 73 00 7C 00 25 00 73 00 7C 00 25 00 73
00 7C 00 25 00 73 00 00 00 5C 00 46 00 69 00 6C
00 74 00 65 00 72 00 33 00 2E 00 6A 00 70 00 67 }
$sc1 = { 25 74 65 6D 70 25 00 00 25 73 5C 25 73 2E 65 78
65 00 00 00 25 74 65 6D 70 25 00 00 25 73 5C 25
73 2E 65 78 65 }
$sc2 = { 61 70 70 6C 69 63 61 74 69 6F 6E 2F 6F 63 74 65
74 2D 73 74 72 65 61 6D 2C 61 70 70 6C 69 63 61
74 69 6F 6E 2F 78 68 74 6D 6C 00 00 25 73 26 69
3D 25 64 00 48 54 54 50 2F 31 2E 31 00 00 00 00
50 4F 53 54 }
$s1 = "%s%s_%d.dat" wide fullword
$s2 = "Local Security Process" wide fullword
$s3 = "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.75" ascii fullword
$s4 = "Global%s%d" wide fullword
$s5 = "ExtKeyloggerStart" ascii fullword
$s6 = "GetExtendedTcpTable" ascii fullword
condition:
uint16( 0 ) == 0x5a4d and filesize < 400KB and ( 1 of ( $x* ) or 3 of them ) or 4 of them
}
Strings (11 Muster)
| Bezeichner | Typ | Wert | Modifikatoren |
|---|---|---|---|
| $xc1 | Hex | { 25 73 26 69 3D 25 64 00 48 54 54 50 2F 31 2E 31 00 00 00 00 50 4F 53 54 00 00 00 00 43 6F 6E 74 65 6E 74 2D 4C 65 6E 67 74 68 3A … | |
| $xc2 | Hex | { 2F 76 3F 6D 3D 00 00 00 35 30 31 00 32 30 30 00 2A 00 2E 00 2A 00 00 00 25 00 73 00 00 00 00 00 53 00 65 00 44 00 65 00 62 00 75 … | |
| $xc3 | Hex | { 00 25 00 73 00 7C 00 25 00 73 00 7C 00 25 00 73 00 7C 00 25 00 73 00 00 00 5C 00 46 00 69 00 6C 00 74 00 65 00 72 00 33 00 2E 00 … | |
| $sc1 | Hex | { 25 74 65 6D 70 25 00 00 25 73 5C 25 73 2E 65 78 65 00 00 00 25 74 65 6D 70 25 00 00 25 73 5C 25 73 2E 65 78 65 } | |
| $sc2 | Hex | { 61 70 70 6C 69 63 61 74 69 6F 6E 2F 6F 63 74 65 74 2D 73 74 72 65 61 6D 2C 61 70 70 6C 69 63 61 74 69 6F 6E 2F 78 68 74 6D 6C 00 … | |
| $s1 | Text | "%s%s_%d.dat" | wide fullword |
| $s2 | Text | "Local Security Process" | wide fullword |
| $s3 | Text | "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.75" | ascii fullword |
| $s4 | Text | "Global%s%d" | wide fullword |
| $s5 | Text | "ExtKeyloggerStart" | ascii fullword |
| $s6 | Text | "GetExtendedTcpTable" | ascii fullword |
Bedingung
uint16( 0 ) == 0x5a4d and filesize < 400KB and ( 1 of ( $x* ) or 3 of them ) or 4 of themIn Worten (Heuristik)
- Die Datei muss mit „MZ“ beginnen — eine Windows-Programmdatei (PE).
- Die Datei muss kleiner als 400KB sein (eine günstige Grenze, die große Dateien ausschließt).
- Mindestens 1 Muster aus ( $x* ) müssen treffen.
- Mindestens 3 Muster aus der Regel müssen treffen.
- Mindestens 4 Muster aus der Regel müssen treffen.
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Proben-Hashes
Hashes der Proben, die der Autor in den Metadaten der Regel nennt (in Ihrer Threat-Intelligence-Plattform nachschlagen).
- 64d78eec46c9ddd4b9a366de62ba0f2813267dc4393bc79e4c9a51a9bb7e6273
- 927d945476191a3523884f4c0784fb71c16b7738bd7f2abd1e3a198af403f0ae
- f0503f0131040b805e106eafe64a65d9404a0e279f052237b868e456c34d36e6
- ed5258306c06d6fac9b13c99c7c8accc7f7fa0de4cf4de4f7d9eccad916555f5
- 04ca010f4c8997a023fabacae230698290e3ff918a86703c5e0a2a6983b039eb
- cb2adcaaa25bb6b8a9f1c685c219f8d6d78aa5cfd65c633f4d255ff81da2c517
Lizenz & Namensnennung
Autor: Florian Roth (Nextron Systems)
Quell-Repository: Signature Base (Florian Roth / Nextron) @ 94a1c48d7a
Lizenz: Detection Rule License 1.1 (Repository-Lizenz)
Gespiegelt über YARA Forge 20260927, das Regelnamen mit der Quelle präfixiert und normalisierte Meta-Felder ergänzt.
Regel-ID: cc413225-f084-5859-bc27-04eb018d8894
Tags:FILE
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