Vendor-native detections for T1081

rule a_variant_of_lokibot_trojan {
 meta:
    author = "Emir Erdogan"
    description = "this rule detects one of lokibot trojan malware. Phishing site downloads trojan via scam e-mail  License: https://github.com/Neo23x0/sigma/blob/master/LICENSE.Detection.Rules.md."
    reference = "https://tdm.socprime.com/tdm/info/Vd9kzWELL9Ef"
    version = "0.01"
    created = "2021-03-09"
    product = "windows"
    service = "sysmon"
    mitre = "T1081, T1566, T1192"

  events:
(($selection.target.process.file.full_path = "C:\\Windows\\system32\\dllhost.exe" and re.regex($selection.principal.process.file.full_path, `.*\\v\.exe`)) or re.regex($selection.principal.hostname, `.*shehig\.com.*`))

  condition:
    $selection
}

rule agenttesla_rat_detection {
 meta:
    author = "Emir Erdogan"
    description = "AgentTesla RAT Detection  License: https://github.com/Neo23x0/sigma/blob/master/LICENSE.Detection.Rules.md."
    reference = "https://tdm.socprime.com/tdm/info/bwpRaR1KCq8h"
    version = "0.01"
    created = "2021-03-09"
    product = "windows"
    service = "sysmon"
    mitre = "T1053, T1081"

  events:
($selection.principal.process.file.full_path = "8cab6413fdc97e9cc90607b3a49175a7.exe" and (re.regex($selection.target.process.file.full_path, `.*RegSvcs\.exe`) or $selection.target.process.file.full_path = "C:\\Windows\\System32\\schtasks.exe") and re.regex($selection.target.process.command_line, `.*/Create /TN \"Updates\\ZwqpnECNvoWf\" /XML \"C:\\Users\\admin\\AppData\\Local\\Temp\\tmp6CEB\.tmp\"`))

  condition:
    $selection
}

rule powershell_obfuscation_by_agenttesla {
 meta:
    author = "Emir Erdogan"
    description = "AgentTesla downloads malware by using obfuscated powershell via ftp server on French Data Center  License: https://github.com/Neo23x0/sigma/blob/master/LICENSE.Detection.Rules.md."
    reference = "https://tdm.socprime.com/tdm/info/lZkiLjSHfmwQ"
    version = "0.01"
    created = "2021-03-09"
    product = "windows"
    service = "sysmon"
    mitre = "T1064, T1060, T1081, T1130"

  events:
((re.regex($selection1.target.process.file.full_path, `.*\\powershell`) and (re.regex($selection1.target.process.command_line, `Powershell $VN=\( '104{100e121'\.SpLiT\('!X_AeZuG{%'\) |fOreACh-oBjeCt{[CHar]\($_-BXOR 0x21 \) }\) -joIN '';sal MUM $VN;$BCmiLrM=@\(.*`) or re.regex($selection1.target.process.command_line, `Powershell '\(&'\+'\(G'\+'C'\+'###'\.replace\('###','M'\)\+' .*W-'\+'O.*\)'\+ 'Ne'\+'t\.'\+'W'\+'eb'\+'C'\+'li'\+'ent\)'\+'\.D'\+'ow'\+'nl'\+'oad'\+'F'\+'il'\+'e\(''.*File\.vbs.*`))) or (re.regex($selection1.target.process.file.full_path, `.*\\RegAsm\.exe`) and re.regex($selection1.principal.process.file.full_path, `.*\\InstallUtil\.exe`)))

  condition:
    $selection1
}