ARKBIRD_SOLG_APT_APT28_VHD_Nov_2020_1

YARA detection rule by Arkbird_SOLG · GPL-2.0

Detect suspicious VHD file with APT28 artefacts inside (November 2020)

rule ARKBIRD_SOLG_APT_APT28_VHD_Nov_2020_1: FILE {
  meta:
    description = "Detect suspicious VHD file with APT28 artefacts inside (November 2020)"
    author      = "Arkbird_SOLG"
    id          = "25452eaa-f135-5b7f-a523-67715a2ab9f7"
    date        = "2020-12-09"
    modified    = "2020-12-10"
    reference   = "https://www.intezer.com/blog/research/russian-apt-uses-covid-19-lures-to-deliver-zebrocy/"
    source_url  = "https://github.com/StrangerealIntel/DailyIOC/blob/a873ff1298c43705e9c67286f3014f4300dd04f7/2020-12-09/APT28/APT_APT28_Nov_2020_1.yar#L3-L35"
    license_url = "N/A"
    logic_hash  = "d72c3428cf731feb63c59ef109b99ec234e69bb6df34bdde928cc4b886f0533b"
    score       = 50
    quality     = 69
    tags        = "FILE"
    level       = "experimental"
    hash1       = "707b752f6bd89d4f97d08602d0546a56d27acfe00e6d5df2a2cb67c5e2eeee30"

  strings:
    $c1  = { 49 6e 76 61 6c 69 64 20 70 61 72 74 69 74 69 6f 6e 20 74 61 62 6c 65 00 45 72 72 6f 72 20 6c 6f 61 64 69 6e 67 20 6f 70 65 72 61 74 69 6e 67 20 73 79 73 74 65 6d 00 4d 69 73 73 69 6e 67 20 6f 70 65 72 61 74 69 6e 67 20 73 79 73 74 65 6d 00 00 00 63 7b }
    $c2  = { 52 90 4e 54 46 53 }
    $c3  = { 41 20 64 69 73 6b 20 72 65 61 64 20 65 72 72 6f 72 20 6f 63 63 75 72 72 65 64 00 0d 0a 42 4f 4f 54 4d 47 52 20 69 73 20 63 6f 6d 70 72 65 73 73 65 64 00 0d 0a 50 72 65 73 73 20 43 74 72 6c 2b 41 6c 74 2b 44 65 6c 20 74 6f 20 72 65 73 74 61 72 74 }
    $c4  = { 42 00 4f 00 4f 00 54 00 4d 00 47 00 52 00 04 00 24 00 49 00 33 00 30 }
    $c5  = { 4e 00 54 00 4c 00 44 00 52 00 07 00 42 00 4f 00 4f 00 54 00 54 00 47 00 54 00 07 00 42 00 4f 00 4f 00 54 00 4e 00 58 00 54 }
    $c6  = { 46 49 4c 45 30 00 03 00 8? ?d }
    $c7  = { 24 00 56 00 6f 00 6c 00 75 00 6d 00 65 00 60 00 00 00 40 }
    $s1  = { 46 61 73 74 4d 4d 20 42 6f 72 6c 61 6e 64 20 45 64 69 74 69 6f 6e 20 a9 20 32 30 30 34 2c 20 32 30 30 35 20 50 69 65 72 72 65 20 6c 65 20 52 69 63 68 65 20 2f 20 50 72 6f 66 65 73 73 69 6f 6e 61 6c 20 53 6f 66 74 77 61 72 65 20 44 65 76 65 6c 6f 70 6d 65 6e 74 }
    $s2  = { 53 4f 46 54 57 41 52 45 5c 42 6f 72 6c 61 6e 64 5c 44 65 6c 70 68 69 5c 52 54 4c 00 46 50 55 4d 61 73 6b 56 61 6c 75 65 }
    $s3  = "SYSTEM\\CurrentControlSet\\Control\\Keyboard Layouts\\"
    $s4  = { 53 79 73 74 65 6d 5c 43 75 72 72 65 6e 74 43 6f 6e 74 72 6f 6c 53 65 74 5c 43 6f 6e 74 72 6f 6c 5c 4b 65 79 62 6f 61 72 64 20 4c 61 79 6f 75 74 73 5c 25 2e 38 78 00 00 6c 61 79 6f 75 74 20 74 65 78 74 }
    $s5  = { 43 00 6f 00 6e 00 6e 00 65 00 63 00 74 00 69 00 6e 00 67 00 20 00 74 00 6f 00 20 00 25 00 73 }
    $s6  = { 52 00 65 00 73 00 6f 00 6c 00 76 00 69 00 6e 00 67 00 20 00 68 00 6f 00 73 00 74 00 6e 00 61 00 6d 00 65 00 20 00 25 00 73 }
    $s7  = { 45 00 72 00 72 00 6f 00 72 00 20 00 72 00 65 00 61 00 64 00 69 00 6e 00 67 00 20 00 25 00 73 00 25 00 73 00 25 00 73 00 3a 00 20 00 25 00 73 00 11 00 53 00 74 00 72 00 65 00 61 00 6d 00 20 00 72 00 65 00 61 00 64 00 20 00 65 00 72 00 72 00 6f 00 72 }
    $s8  = "%s, ClassID: %s"
    $s9  = { 43 6f 6e 6e 65 63 74 4b 69 6e 64 b0 10 40 00 44 00 00 ff 44 00 00 ff 01 00 00 00 00 00 00 80 00 00 00 80 04 00 11 52 65 6d 6f 74 65 4d 61 63 68 69 6e 65 4e 61 6d 65 }
    $s10 = { 22 20 4e 54 2f 20 [1-4] 20 4f 4d 2f 20 45 54 55 4e 49 4d 20 43 53 2f 20 65 74 61 65 72 43 2f 20 73 6b 73 61 74 68 63 73 }
    $s11 = "//:ptth"

  condition:
    uint16(0) == 0x33c0 and filesize > 40KB and 5 of ($c*) and 8 of ($s*)
}

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

413fa0d0-7ff4-4fc5-916f-8cc0e51c3161

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Rejected pattern present

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