Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/01/2023, 10:45

General

  • Target

    tmp.exe

  • Size

    228KB

  • MD5

    8b37c8c2c2beefd373d98526c700109a

  • SHA1

    e5acac1ffd8ced2e30313a0e93129524dd91c952

  • SHA256

    64a8c9065258f70f7567b5d52da2738c6e63580cc64a95273b454f45addf50f5

  • SHA512

    f41ff902b633f2119c584290f3089922a828d546b1a484659225d2426c70f961993e305c911896d1abf738d87bfcd31dc51d18b1d9e692099d74644e6b2963eb

  • SSDEEP

    6144:/Ya6qkxtNGqZnjsvzTXRDK6wgQ7js0YXQzf8PWFJMNXYSZm3k:/YUkEqZQH9KJgis0uRYSYk

Malware Config

Extracted

Family

formbook

Campaign

u8ow

Decoy

uzhDDUNgg10rOh8rkUMGYiLuNnRWl9gwMQ==

bfkA4IUaSgYi7IA=

ezX5yHeR21O3h2RCgQ==

x3E4ntHeLMGQm0kdTi6PJtjOVS6Em8UaKA==

xJuAYwcZLAfqrVazWjvkirgFxDSf

qrGugLdannLYegX5dCtFMA==

i61nMddueAYi7IA=

RoNMKNhtdDWpeiYoaB37TPiHTLo=

RFj3UHHrDtAktSZhYku36opnsaMbNA==

lx0g+6RPl4jwwNPRPuTD

MyEQ4oGk6vXrMM4V

0IVWH0rfKe1J4nn6J9XB

SYVlN3Zrnq2OaWpDiQ==

fNa0jy3P8KQK25rpmwqd0t8=

UZuSZpW+9ffX9KXzmgqd0t8=

Vxf85YCWvYNZjkcDdCtFMA==

0gG1EzLP7/DrMM4V

WExRGVAEE6YS5tJkTxMhR636+A==

6Tv7U4QdURt1KUI+gw==

ooR7RXgsXPtaEutnaQ3efjIXmfJePavzIA==

Signatures

  • Formbook

    Formbook is a data stealing malware which is capable of stealing data.

  • Xloader

    Xloader is a rebranded version of Formbook malware.

  • Xloader payload 3 IoCs
  • Executes dropped EXE 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.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Program crash 1 IoCs
  • Gathers network information 2 TTPs 1 IoCs

    Uses commandline utility to view network configuration.

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 56 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 25 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Drops file in Program Files directory
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3052
    • C:\Users\Admin\AppData\Local\Temp\tmp.exe
      "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2136
      • C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe
        "C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe" C:\Users\Admin\AppData\Local\Temp\mewbf.gv
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:4292
        • C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe
          "C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe"
          4⤵
          • Executes dropped EXE
          • Checks computer location settings
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of AdjustPrivilegeToken
          PID:4268
    • C:\Windows\SysWOW64\NETSTAT.EXE
      "C:\Windows\SysWOW64\NETSTAT.EXE"
      2⤵
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Drops file in Program Files directory
      • Gathers network information
      • Modifies Internet Explorer settings
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1236
      • C:\Windows\SysWOW64\cmd.exe
        /c del "C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe"
        3⤵
          PID:2324
        • 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:4628
          • 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:1720
            • C:\Program Files\Mozilla Firefox\Firefox.exe
              "C:\Program Files\Mozilla Firefox\Firefox.exe"
              3⤵
                PID:2388
            • C:\Program Files (x86)\R6lkdfn9h\help_tbhil.exe
              "C:\Program Files (x86)\R6lkdfn9h\help_tbhil.exe"
              2⤵
              • Executes dropped EXE
              PID:408
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 408 -s 340
                3⤵
                • Program crash
                PID:5112
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 408 -ip 408
            1⤵
              PID:1768

            Network

                  MITRE ATT&CK Enterprise v6

                  Replay Monitor

                  Loading Replay Monitor...

                  Downloads

                  • C:\Program Files (x86)\R6lkdfn9h\help_tbhil.exe

                    Filesize

                    6KB

                    MD5

                    44a7bf46a9c01d3e0486c93767b6cc0f

                    SHA1

                    3cc13566319f0d73f4931a101799862907cd361d

                    SHA256

                    b016acfefe7a25f43ec9f9e89bff4d03ea9470941e283b10599acb6769cf76b9

                    SHA512

                    e36053cba4c316a26a72857959c12db9813f1c1187c03d2ecfb545fb54fde6286302054b353a6aead3bb15429ffb6bc2d1bee68cb65cf8df7c0994ff3ffe0602

                  • C:\Program Files (x86)\R6lkdfn9h\help_tbhil.exe

                    Filesize

                    6KB

                    MD5

                    44a7bf46a9c01d3e0486c93767b6cc0f

                    SHA1

                    3cc13566319f0d73f4931a101799862907cd361d

                    SHA256

                    b016acfefe7a25f43ec9f9e89bff4d03ea9470941e283b10599acb6769cf76b9

                    SHA512

                    e36053cba4c316a26a72857959c12db9813f1c1187c03d2ecfb545fb54fde6286302054b353a6aead3bb15429ffb6bc2d1bee68cb65cf8df7c0994ff3ffe0602

                  • 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

                  • C:\Users\Admin\AppData\Local\Temp\mewbf.gv

                    Filesize

                    5KB

                    MD5

                    3c244d8bf6174dbc41727abc9ece7acf

                    SHA1

                    797f05cbef6c579880841488a2ef85a8064db9fa

                    SHA256

                    fa3e5994908aed3ee28a15d4f45f396603fd9026db11a342a90c590f5d48a85b

                    SHA512

                    93030940192dcbe0e83895c89de7d57998199fdd6dc71d4dd76d62b2fbadff9aa2a43aea5797bc3d1b17afeda64104a202bde6255647f04a6cb42b8f5282b253

                  • C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe

                    Filesize

                    6KB

                    MD5

                    44a7bf46a9c01d3e0486c93767b6cc0f

                    SHA1

                    3cc13566319f0d73f4931a101799862907cd361d

                    SHA256

                    b016acfefe7a25f43ec9f9e89bff4d03ea9470941e283b10599acb6769cf76b9

                    SHA512

                    e36053cba4c316a26a72857959c12db9813f1c1187c03d2ecfb545fb54fde6286302054b353a6aead3bb15429ffb6bc2d1bee68cb65cf8df7c0994ff3ffe0602

                  • C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe

                    Filesize

                    6KB

                    MD5

                    44a7bf46a9c01d3e0486c93767b6cc0f

                    SHA1

                    3cc13566319f0d73f4931a101799862907cd361d

                    SHA256

                    b016acfefe7a25f43ec9f9e89bff4d03ea9470941e283b10599acb6769cf76b9

                    SHA512

                    e36053cba4c316a26a72857959c12db9813f1c1187c03d2ecfb545fb54fde6286302054b353a6aead3bb15429ffb6bc2d1bee68cb65cf8df7c0994ff3ffe0602

                  • C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe

                    Filesize

                    6KB

                    MD5

                    44a7bf46a9c01d3e0486c93767b6cc0f

                    SHA1

                    3cc13566319f0d73f4931a101799862907cd361d

                    SHA256

                    b016acfefe7a25f43ec9f9e89bff4d03ea9470941e283b10599acb6769cf76b9

                    SHA512

                    e36053cba4c316a26a72857959c12db9813f1c1187c03d2ecfb545fb54fde6286302054b353a6aead3bb15429ffb6bc2d1bee68cb65cf8df7c0994ff3ffe0602

                  • C:\Users\Admin\AppData\Local\Temp\zkoclolbinv.obd

                    Filesize

                    196KB

                    MD5

                    7ae7dcc7e63caee1fd3da08154fa103d

                    SHA1

                    c2c152ce21732ad9be3c06d28de2aa28340a095a

                    SHA256

                    5395f4b1e2cdd4ab2cc06957df8e8f4264cfea3fbd7e6970ab9e9a6f0ff2d58b

                    SHA512

                    c707b92084a8bde6c11bfa36519389c017cda33b8e1223a116e3055549d7c713f05d16113f739e466c9d3d03dbc8b32058eee43c3caace8e8a6ab4adfb6c232b

                  • memory/1236-149-0x00000000018A0000-0x0000000001930000-memory.dmp

                    Filesize

                    576KB

                  • memory/1236-146-0x00000000012D0000-0x00000000012FC000-memory.dmp

                    Filesize

                    176KB

                  • memory/1236-145-0x00000000004D0000-0x00000000004DB000-memory.dmp

                    Filesize

                    44KB

                  • memory/1236-147-0x0000000001B10000-0x0000000001E5A000-memory.dmp

                    Filesize

                    3.3MB

                  • memory/1236-148-0x00000000012D0000-0x00000000012FC000-memory.dmp

                    Filesize

                    176KB

                  • memory/3052-150-0x0000000007C10000-0x0000000007CD8000-memory.dmp

                    Filesize

                    800KB

                  • memory/3052-151-0x0000000007C10000-0x0000000007CD8000-memory.dmp

                    Filesize

                    800KB

                  • memory/3052-142-0x0000000002890000-0x000000000297A000-memory.dmp

                    Filesize

                    936KB

                  • memory/4268-141-0x00000000008E0000-0x00000000008F1000-memory.dmp

                    Filesize

                    68KB

                  • memory/4268-140-0x0000000000A20000-0x0000000000D6A000-memory.dmp

                    Filesize

                    3.3MB

                  • memory/4268-139-0x0000000000400000-0x000000000042C000-memory.dmp

                    Filesize

                    176KB