Analysis

  • max time kernel
    151s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/11/2022, 20:36

General

  • Target

    77f45980db85b03262a24bf8180ad13a.exe

  • Size

    297KB

  • MD5

    77f45980db85b03262a24bf8180ad13a

  • SHA1

    1c88267a23fb223f69c1c6888e9d6cee5f5c1107

  • SHA256

    01ef4643d1e6b32b776171f9ec4cd10b106df2d9a3afd82b174853f5527f4266

  • SHA512

    a721e89c2e3a8f97f62bd9aadf0349502e14961fcad5ba737ab372fbfdf47e166615ddeb4f95b57a6cb4728c2bc8ea9c09f5c38a29f2158fdeed2d7919801650

  • SSDEEP

    6144:rrhFVTLzEATViGiWbU6E+DNinGf7ITsq:rrhFpPEATsGiBt+DN/7

Malware Config

Signatures

  • Detects Smokeloader packer 1 IoCs
  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Blocklisted process makes network request 2 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 5 IoCs
  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Checks processor information in registry 2 TTPs 44 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies Internet Explorer settings 1 TTPs 4 IoCs
  • Modifies registry class 19 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 28 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\77f45980db85b03262a24bf8180ad13a.exe
    "C:\Users\Admin\AppData\Local\Temp\77f45980db85b03262a24bf8180ad13a.exe"
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:5080
  • C:\Users\Admin\AppData\Local\Temp\1B87.exe
    C:\Users\Admin\AppData\Local\Temp\1B87.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:4796
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\syswow64\rundll32.exe" "C:\Windows\syswow64\shell32.dll",#61
      2⤵
      • Blocklisted process makes network request
      PID:2464
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4796 -s 616
      2⤵
      • Program crash
      PID:4992
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4796 -s 932
      2⤵
      • Program crash
      PID:1568
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4796 -s 932
      2⤵
      • Program crash
      PID:3480
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4796 -s 1048
      2⤵
      • Program crash
      PID:5088
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\syswow64\rundll32.exe" "C:\Windows\syswow64\shell32.dll",#61
      2⤵
      • Checks processor information in registry
      • Modifies registry class
      • Suspicious use of FindShellTrayWindow
      PID:1416
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4796 -s 1064
      2⤵
      • Program crash
      PID:2116
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4796 -ip 4796
    1⤵
      PID:1260
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 4796 -ip 4796
      1⤵
        PID:1952
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 4796 -ip 4796
        1⤵
          PID:956
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 4796 -ip 4796
          1⤵
            PID:4048
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 568 -p 4796 -ip 4796
            1⤵
              PID:2072

            Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            • C:\Users\Admin\AppData\Local\Temp\1B87.exe

              Filesize

              1.3MB

              MD5

              732d046a90e12154caa701505613d8d7

              SHA1

              b29f186414b487c4de6205030ca41a3b97323070

              SHA256

              d27d91d23e0fbd7028c88ddde6c29652fd2fc86b2d911d5e648dc56d0e15e212

              SHA512

              8373d2480869173ebeac757d6d5a263eda29ab4890b174e07458d86bb599d28ac9e445dfc53a4d9cf08b046e8079685d2ffb0f63a48278dba503d9f3b013ce74

            • C:\Users\Admin\AppData\Local\Temp\1B87.exe

              Filesize

              1.3MB

              MD5

              732d046a90e12154caa701505613d8d7

              SHA1

              b29f186414b487c4de6205030ca41a3b97323070

              SHA256

              d27d91d23e0fbd7028c88ddde6c29652fd2fc86b2d911d5e648dc56d0e15e212

              SHA512

              8373d2480869173ebeac757d6d5a263eda29ab4890b174e07458d86bb599d28ac9e445dfc53a4d9cf08b046e8079685d2ffb0f63a48278dba503d9f3b013ce74

            • C:\Users\Admin\AppData\Local\Temp\Wffwew.tmp

              Filesize

              3.5MB

              MD5

              a7d875022bb5e3a34d034b947003d1b3

              SHA1

              5905ca93fea101ce80e5bf8925eb2a7eec1e333d

              SHA256

              bcdf4c540c4289f81c98448d0a4482a96522fb767ab6015e76288afce148226a

              SHA512

              f2b78a100cf0fa84909629b892e548d7ef9797621623a96aa75f15241d7350eecca117c3793056c30dc317ade8ecc0023c2b875516d9c25ac9bb0d880bb3149a

            • memory/1416-173-0x0000000002BC0000-0x0000000003720000-memory.dmp

              Filesize

              11.4MB

            • memory/1416-172-0x0000000003720000-0x0000000003860000-memory.dmp

              Filesize

              1.2MB

            • memory/1416-171-0x0000000003720000-0x0000000003860000-memory.dmp

              Filesize

              1.2MB

            • memory/1416-170-0x0000000003720000-0x0000000003860000-memory.dmp

              Filesize

              1.2MB

            • memory/1416-169-0x0000000003720000-0x0000000003860000-memory.dmp

              Filesize

              1.2MB

            • memory/1416-168-0x0000000002BC0000-0x0000000003720000-memory.dmp

              Filesize

              11.4MB

            • memory/1416-167-0x0000000002BC0000-0x0000000003720000-memory.dmp

              Filesize

              11.4MB

            • memory/1416-166-0x00000000009E0000-0x0000000001420000-memory.dmp

              Filesize

              10.2MB

            • memory/2464-144-0x00000000007A0000-0x00000000007A4000-memory.dmp

              Filesize

              16KB

            • memory/2464-146-0x00000000007C0000-0x00000000007C4000-memory.dmp

              Filesize

              16KB

            • memory/2464-147-0x00000000007D0000-0x00000000007D4000-memory.dmp

              Filesize

              16KB

            • memory/2464-148-0x00000000007E0000-0x00000000007E4000-memory.dmp

              Filesize

              16KB

            • memory/2464-149-0x00000000007F0000-0x00000000007F4000-memory.dmp

              Filesize

              16KB

            • memory/2464-150-0x0000000000800000-0x0000000000804000-memory.dmp

              Filesize

              16KB

            • memory/2464-151-0x0000000000800000-0x0000000000804000-memory.dmp

              Filesize

              16KB

            • memory/2464-145-0x00000000007B0000-0x00000000007B4000-memory.dmp

              Filesize

              16KB

            • memory/4796-159-0x0000000003F90000-0x00000000040D0000-memory.dmp

              Filesize

              1.2MB

            • memory/4796-164-0x0000000003F90000-0x00000000040D0000-memory.dmp

              Filesize

              1.2MB

            • memory/4796-155-0x0000000003330000-0x0000000003E90000-memory.dmp

              Filesize

              11.4MB

            • memory/4796-156-0x0000000003330000-0x0000000003E90000-memory.dmp

              Filesize

              11.4MB

            • memory/4796-157-0x0000000003F90000-0x00000000040D0000-memory.dmp

              Filesize

              1.2MB

            • memory/4796-158-0x0000000003F90000-0x00000000040D0000-memory.dmp

              Filesize

              1.2MB

            • memory/4796-152-0x0000000000400000-0x0000000000957000-memory.dmp

              Filesize

              5.3MB

            • memory/4796-160-0x0000000003F90000-0x00000000040D0000-memory.dmp

              Filesize

              1.2MB

            • memory/4796-161-0x0000000003F90000-0x00000000040D0000-memory.dmp

              Filesize

              1.2MB

            • memory/4796-162-0x0000000003F90000-0x00000000040D0000-memory.dmp

              Filesize

              1.2MB

            • memory/4796-163-0x0000000003F90000-0x00000000040D0000-memory.dmp

              Filesize

              1.2MB

            • memory/4796-154-0x0000000003330000-0x0000000003E90000-memory.dmp

              Filesize

              11.4MB

            • memory/4796-175-0x0000000000400000-0x0000000000957000-memory.dmp

              Filesize

              5.3MB

            • memory/4796-142-0x0000000000400000-0x0000000000957000-memory.dmp

              Filesize

              5.3MB

            • memory/4796-141-0x00000000027A0000-0x0000000002A6C000-memory.dmp

              Filesize

              2.8MB

            • memory/4796-140-0x00000000025E3000-0x0000000002705000-memory.dmp

              Filesize

              1.1MB

            • memory/4796-139-0x0000000000400000-0x0000000000957000-memory.dmp

              Filesize

              5.3MB

            • memory/4796-174-0x0000000003330000-0x0000000003E90000-memory.dmp

              Filesize

              11.4MB

            • memory/5080-134-0x0000000000400000-0x0000000002C39000-memory.dmp

              Filesize

              40.2MB

            • memory/5080-132-0x0000000003022000-0x0000000003037000-memory.dmp

              Filesize

              84KB

            • memory/5080-135-0x0000000000400000-0x0000000002C39000-memory.dmp

              Filesize

              40.2MB

            • memory/5080-133-0x00000000001F0000-0x00000000001F9000-memory.dmp

              Filesize

              36KB