Analysis

  • max time kernel
    148s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    05-07-2022 18:41

General

  • Target

    tmp.exe

  • Size

    616KB

  • MD5

    c6d0aca39ecb129499f77720fbaa92b1

  • SHA1

    e5ea01305c8447e01d78733d7982b79ac45b6581

  • SHA256

    d9953c25aba720427a7122609ba2ec3ed42861e9acd631dc5f2a0deb3d8508b5

  • SHA512

    3416a1b0696a7d0ee59d4289f9a243c93fb1887753b2a06c9b3e038d46739ba62365940f155aec94538aa8a8ef534126b3ded4ae8ca8e3603fcfac0b8ba2e5fd

Malware Config

Extracted

Family

xloader

Version

2.8

Campaign

nn40

Decoy

LYAg0yANOGEAGeaFOrA/

MQWuERZplP+VZy/uszI=

CF0oDN0JimIaGy/uszI=

ltJnyC+ReohYaiTvj1qbEA==

B9OkgdctVKBAFjSUaw==

sbDVwSZVVqVB11/deow8GA==

v1gHDe0pzno=

i+/0n2vHUfGPR98k77tukZ90MQ==

SUtCnbS96Qm21g==

8X9qzyt1dpAo31jXrXfKb49fBPY=

5KlPxqHzSstuFjSUaw==

0r/Kesv/zuanroxvNQW0Gm8=

FFgS7kfPYAqpdhhgRgnBJHY=

LgusAHrkrIoWr0FWIe2o/04UXPw=

vBq9Gvxa9wbKbS/uszI=

Z+q6HAZNNeqwwQ==

wbS4fMb06SjU5Kbseow8GA==

1mZEuZvJ/m0L9bof56PkkZ90MQ==

JCJIM74lHk/o+tiFOrA/

d14FrM8rGEgIzVkT67+3XaEh

Signatures

  • Xloader

    Xloader is a rebranded version of Formbook malware.

  • suricata: ET MALWARE FormBook CnC Checkin (GET)

    suricata: ET MALWARE FormBook CnC Checkin (GET)

  • suricata: ET MALWARE FormBook CnC Checkin (POST) M2

    suricata: ET MALWARE FormBook CnC Checkin (POST) M2

  • Xloader Payload 3 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Suspicious use of SetThreadContext 3 IoCs
  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 40 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of WriteProcessMemory
    PID:3144
    • C:\Users\Admin\AppData\Local\Temp\tmp.exe
      "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:4748
      • C:\Users\Admin\AppData\Local\Temp\tmp.exe
        "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
        3⤵
        • Checks computer location settings
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of AdjustPrivilegeToken
        PID:5100
    • C:\Windows\SysWOW64\control.exe
      "C:\Windows\SysWOW64\control.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Modifies Internet Explorer settings
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2292
      • C:\Windows\SysWOW64\cmd.exe
        /c copy "C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
        3⤵
          PID:2520
        • C:\Windows\SysWOW64\cmd.exe
          /c copy "C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
          3⤵
            PID:2712
          • C:\Program Files\Mozilla Firefox\Firefox.exe
            "C:\Program Files\Mozilla Firefox\Firefox.exe"
            3⤵
              PID:2668

        Network

        MITRE ATT&CK Matrix ATT&CK v6

        Defense Evasion

        Modify Registry

        1
        T1112

        Credential Access

        Credentials in Files

        1
        T1081

        Discovery

        Query Registry

        1
        T1012

        System Information Discovery

        1
        T1082

        Collection

        Data from Local System

        1
        T1005

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\DB1
          Filesize

          40KB

          MD5

          b608d407fc15adea97c26936bc6f03f6

          SHA1

          953e7420801c76393902c0d6bb56148947e41571

          SHA256

          b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf

          SHA512

          cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4

        • C:\Users\Admin\AppData\Local\Temp\DB1
          Filesize

          48KB

          MD5

          349e6eb110e34a08924d92f6b334801d

          SHA1

          bdfb289daff51890cc71697b6322aa4b35ec9169

          SHA256

          c9fd7be4579e4aa942e8c2b44ab10115fa6c2fe6afd0c584865413d9d53f3b2a

          SHA512

          2a635b815a5e117ea181ee79305ee1baf591459427acc5210d8c6c7e447be3513ead871c605eb3d32e4ab4111b2a335f26520d0ef8c1245a4af44e1faec44574

        • memory/2292-143-0x0000000000000000-mapping.dmp
        • memory/2292-147-0x0000000002460000-0x00000000024F0000-memory.dmp
          Filesize

          576KB

        • memory/2292-146-0x0000000002650000-0x000000000299A000-memory.dmp
          Filesize

          3.3MB

        • memory/2292-145-0x0000000000660000-0x000000000068C000-memory.dmp
          Filesize

          176KB

        • memory/2292-144-0x0000000000990000-0x00000000009B7000-memory.dmp
          Filesize

          156KB

        • memory/2520-150-0x0000000000000000-mapping.dmp
        • memory/2712-152-0x0000000000000000-mapping.dmp
        • memory/3144-149-0x00000000084D0000-0x000000000862B000-memory.dmp
          Filesize

          1.4MB

        • memory/3144-148-0x00000000084D0000-0x000000000862B000-memory.dmp
          Filesize

          1.4MB

        • memory/3144-142-0x00000000028A0000-0x0000000002A37000-memory.dmp
          Filesize

          1.6MB

        • memory/4748-135-0x00000000089E0000-0x0000000008A46000-memory.dmp
          Filesize

          408KB

        • memory/4748-130-0x0000000000040000-0x00000000000E0000-memory.dmp
          Filesize

          640KB

        • memory/4748-134-0x00000000088A0000-0x000000000893C000-memory.dmp
          Filesize

          624KB

        • memory/4748-133-0x0000000004B20000-0x0000000004B2A000-memory.dmp
          Filesize

          40KB

        • memory/4748-132-0x0000000004A70000-0x0000000004B02000-memory.dmp
          Filesize

          584KB

        • memory/4748-131-0x00000000050F0000-0x0000000005694000-memory.dmp
          Filesize

          5.6MB

        • memory/5100-141-0x0000000000F60000-0x0000000000F71000-memory.dmp
          Filesize

          68KB

        • memory/5100-140-0x0000000001460000-0x00000000017AA000-memory.dmp
          Filesize

          3.3MB

        • memory/5100-139-0x0000000000400000-0x000000000042C000-memory.dmp
          Filesize

          176KB

        • memory/5100-137-0x0000000000400000-0x000000000042C000-memory.dmp
          Filesize

          176KB

        • memory/5100-136-0x0000000000000000-mapping.dmp