Agent Tesla
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date: 5/5/2021
delivery: Unknown
persistence: scheduled Task, \Updates\SPjSKjh, c:\users\<userid>\appdata\roaming\spjskih.exe
capabilities (per memory strings): Keylogger (KeyDown, KeyboardState, StartKeyLogger), Credential Theft (UCBrowser, Vivaldi, Thunderbird, etc.)
c2s: unknown
identification method: filname similar to previous (vbc.exe) and other patterns match like re-launch EXE after 1min45sec, smtp type c2 possible, etc.
special notes: .net executable, starts execution at about ~14 to 15mb initially, waits about 1 min 45 seconds, then relaunched itself, new pid, 2nd executable waits several minutes to do anything, then checks for credentials (chrome, qqbrowser, ultravnc, thunderbird, waterfox, etc.) through disk and registry, in memory strings on 2nd end up including the credential theft, also this has "Snake Keylogger" inside it per strings, as well as API.Telegram.org connections and possible SMTP c2 with email address
samples:
EXE - https://www.virustotal.com/gui/file/089d065fe8e39f8b19a726cb15ac216e352a5576f446c5fc38486f1fbb7a1d9c/detection
links:
https://twitter.com/neonprimetime/status/1389964247942279168
screenshots:
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date: 4/29/2021
delivery: email [Subject: New PO#422328, ISO (PO#0422328.pdf.iso) w/ EXE inside (PO#04222328.pdf.exe)]
persistence: startup registry entry (hkcu\software\microsoft\currentversion\run, gqxRqe, c:\users\<userid>appdata\roaming\gqxRqe\gqxRqe.exe)
capabilities (per memory strings): Keylogger (KeyDown, KeyboardState), Credential Theft (UCBrowser, Vivaldi, Thunderbird, etc.)
c2s: unknown
identification method: strings in memory matching previously seen ( %mailaddres%%password%%smtp%%toemail% )
special notes: .net executable, link to torproject.org download in .net code, code for webrequest and smtpclient, double file extension (PO#04222328.pdf.exe), starts execution at about ~14 to 15mb initially, waits about 1 min 45 seconds, then relaunched itself, new pid, 2nd executable waits several minutes to do anything, only gets to ~17mb or 18mb, then checks for credentials (chrome, qqbrowser, ultravnc, thunderbird, waterfox, etc.) through disk and registry, in memory strings on 2nd end up including the credential theft
samples:
ISO - https://www.virustotal.com/gui/file/f07b343d5a7b752a5b396b06174428a66ab98d8bb28bf33e9ea911797c32af2d/detection
EXE - https://www.virustotal.com/gui/file/83bcf31fc0d06b39c6cce6bc074cde9033f5e378f0104da887ec3f924f73376a/detection
links:
https://twitter.com/neonprimetime/status/1387837559531786243
screenshots:
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date: 10/13/2020
delivery: email [Subject: Request for Quotation, Link to DOC (http://107.173.219[.]56/document ), downloads EXE from same domain ( http://107.173.219[.]56/tmt.exe ), runs Equation Editor exploit (EQNEDT32.EXE)]
persistence: unknown
capabilities (per memory strings): unknown
c2s: smtp.yandex[.]ru
identification method: twitter replies
special notes: child processes of "vbc.exe" and "RegAsm.exe"
samples:
DOC - https://app.any.run/tasks/0410129a-646d-4c19-8207-081679403171/
links:
https://twitter.com/neonprimetime/status/1316107602942668800
screenshots:
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