Concrete signature match: Trojan - Appears legitimate but performs malicious actions for 32-bit Windows platform, family FraudLoad
Trojan:Win32/FraudLoad.A!MTB is a trojan that downloads and installs additional unwanted software, often scareware or other malware. The '!MTB' designation indicates it was identified by Microsoft's machine learning behavioral analysis, which detected suspicious actions characteristic of the FraudLoad family.
Relevant strings associated with this threat: - 8@A; (PEHSTR_EXT) - QueryPerformanceCounter (PEHSTR_EXT) - aC, (PEHSTR) - |#d1e49aac-8f56-4280-b9ba-993a6d77406c (NID) - }#d1e49aac-8f56-4280-b9ba-993a6d77406c (NID) - &|#b2b3f03d-6a65-4f7b-a9c7-1c7ef74a9ba4 (NID) - &}#b2b3f03d-6a65-4f7b-a9c7-1c7ef74a9ba4 (NID) - y*|#56a863a9-875e-4185-98a7-b882c64b5ce5 (NID) - y*}#56a863a9-875e-4185-98a7-b882c64b5ce5 (NID) - C|#be9ba2d9-53ea-4cdc-84e5-9b1eeee46550 (NID) - C}#be9ba2d9-53ea-4cdc-84e5-9b1eeee46550 (NID) - L|#3b576869-a4ec-4529-8536-b80a7769e899 (NID) - L}#3b576869-a4ec-4529-8536-b80a7769e899 (NID) - |#5beb7efe-fd9a-4556-801d-275e5ffc04cc (NID) - }#5beb7efe-fd9a-4556-801d-275e5ffc04cc (NID) - |#01443614-cd74-433a-b99e-2ecdc07bfc25 (NID) - }#01443614-cd74-433a-b99e-2ecdc07bfc25 (NID) - |#d3e037e1-3eb8-44c8-a917-57927947596d (NID) - }#d3e037e1-3eb8-44c8-a917-57927947596d (NID) - |#7674ba52-37eb-4a4f-a9a1-f0f9a1619a2c (NID) - }#7674ba52-37eb-4a4f-a9a1-f0f9a1619a2c (NID) - |#92e97fa1-2edf-4476-bdd6-9dd0b4dddc7b (NID) - }#92e97fa1-2edf-4476-bdd6-9dd0b4dddc7b (NID)
rule Trojan_Win32_FraudLoad_A_2147917886_0
{
meta:
author = "threatcheck.sh"
detection_name = "Trojan:Win32/FraudLoad.A!MTB"
threat_id = "2147917886"
type = "Trojan"
platform = "Win32: Windows 32-bit platform"
family = "FraudLoad"
severity = "Critical"
info = "MTB: Microsoft Threat Behavior"
signature_type = "SIGNATURE_TYPE_PEHSTR"
threshold = "1"
strings_accuracy = "High"
strings:
$x_1_1 = {43 2c eb 03 8b 46 30 99 2b c2 d1 f8 01 43 2c 8b 43 2c 03 c1 c7 45 dc 01 00 00 00 eb 31 8b 55 e8 39 53 30 0f 82 f6 00 00 00 8b 96 bc 00 00 00 3b c2 7e 08 85 d2 0f 8f e4 00 00 00 40 89 43 34 8b 43 2c 03 c1 ff 45 ec c7 43 30 00 00 00 00 8b 55 f4 89 43 28 89 53 14 8b 53 24 89 4b 18 8b 46 18 89} //weight: 1, accuracy: High
condition:
(filesize < 20MB) and
(all of ($x*))
}44712bce3f57afef3731390e3d6704cddc692a3130ccf94727fbfe23beca1f53Isolate the affected system from the network. Use your security software to perform a full scan and remove the detected threat and any additional payloads. Review recently installed applications and change passwords for accounts used on the system.