Resubmissions

26-09-2021 14:45

210926-r43blaehcn 10

26-09-2021 14:26

210926-rrve8aehh8 10

Analysis

  • max time kernel
    1802s
  • max time network
    1592s
  • platform
    windows10_x64
  • resource
    win10-en-20210920
  • submitted
    26-09-2021 14:45

General

  • Target

    3dd4ba94c558b54ba1fe639566cbc368.exe

  • Size

    237KB

  • MD5

    3dd4ba94c558b54ba1fe639566cbc368

  • SHA1

    8c44f1c918c3d2fd48694e8af653e473be3e02c1

  • SHA256

    c75b223b462ba88c62c1c8d848a845e7aeacc0ec0c96a7ecf1644e782accdd52

  • SHA512

    58e828507bd3be52ea340ed835c3dc06a655db0a067c746ef65e7382d2b09eb5e7d6847dc679b89539826b598749e60ddf62859e25930b8e586acc11228bb1fa

Malware Config

Extracted

Family

smokeloader

Version

2020

C2

http://naghenrietti1.top/

http://kimballiett2.top/

http://xadriettany3.top/

http://jebeccallis4.top/

http://nityanneron5.top/

http://umayaniela6.top/

http://lynettaram7.top/

http://sadineyalas8.top/

http://geenaldencia9.top/

http://aradysiusep10.top/

rc4.i32
rc4.i32

Signatures

  • Arkei

    Arkei is an infostealer written in C++.

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Arkei Stealer Payload 1 IoCs
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • Downloads MZ/PE file
  • Executes dropped EXE 8 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Deletes itself 1 IoCs
  • Loads dropped DLL 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Themida packer 2 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Program crash 1 IoCs
  • Checks SCSI registry key(s) 3 TTPs 12 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 50 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3dd4ba94c558b54ba1fe639566cbc368.exe
    "C:\Users\Admin\AppData\Local\Temp\3dd4ba94c558b54ba1fe639566cbc368.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2060
    • C:\Users\Admin\AppData\Local\Temp\3dd4ba94c558b54ba1fe639566cbc368.exe
      "C:\Users\Admin\AppData\Local\Temp\3dd4ba94c558b54ba1fe639566cbc368.exe"
      2⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:2248
  • C:\Users\Admin\AppData\Local\Temp\160A.exe
    C:\Users\Admin\AppData\Local\Temp\160A.exe
    1⤵
    • Executes dropped EXE
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of AdjustPrivilegeToken
    PID:2672
  • C:\Users\Admin\AppData\Local\Temp\1337.exe
    C:\Users\Admin\AppData\Local\Temp\1337.exe
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    PID:4080
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4080 -s 1324
      2⤵
      • Program crash
      • Suspicious use of AdjustPrivilegeToken
      PID:1676
  • C:\Users\Admin\AppData\Roaming\sfaudft
    C:\Users\Admin\AppData\Roaming\sfaudft
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2144
    • C:\Users\Admin\AppData\Roaming\sfaudft
      C:\Users\Admin\AppData\Roaming\sfaudft
      2⤵
      • Executes dropped EXE
      • Checks SCSI registry key(s)
      • Suspicious behavior: MapViewOfSection
      PID:2256
  • C:\Users\Admin\AppData\Roaming\sfaudft
    C:\Users\Admin\AppData\Roaming\sfaudft
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2696
    • C:\Users\Admin\AppData\Roaming\sfaudft
      C:\Users\Admin\AppData\Roaming\sfaudft
      2⤵
      • Executes dropped EXE
      • Checks SCSI registry key(s)
      • Suspicious behavior: MapViewOfSection
      PID:3132
  • C:\Users\Admin\AppData\Roaming\sfaudft
    C:\Users\Admin\AppData\Roaming\sfaudft
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1284
    • C:\Users\Admin\AppData\Roaming\sfaudft
      C:\Users\Admin\AppData\Roaming\sfaudft
      2⤵
      • Executes dropped EXE
      • Checks SCSI registry key(s)
      • Suspicious behavior: MapViewOfSection
      PID:1044

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/1284-163-0x00000000004D0000-0x000000000057E000-memory.dmp

    Filesize

    696KB

  • memory/2060-115-0x0000000000740000-0x0000000000749000-memory.dmp

    Filesize

    36KB

  • memory/2248-116-0x0000000000400000-0x0000000000409000-memory.dmp

    Filesize

    36KB

  • memory/2672-132-0x0000000007500000-0x0000000007501000-memory.dmp

    Filesize

    4KB

  • memory/2672-135-0x00000000071D0000-0x00000000071D1000-memory.dmp

    Filesize

    4KB

  • memory/2672-138-0x0000000007BD0000-0x0000000007BD1000-memory.dmp

    Filesize

    4KB

  • memory/2672-123-0x0000000000C70000-0x0000000000C71000-memory.dmp

    Filesize

    4KB

  • memory/2672-125-0x0000000005B90000-0x0000000005B91000-memory.dmp

    Filesize

    4KB

  • memory/2672-136-0x00000000072F0000-0x00000000072F1000-memory.dmp

    Filesize

    4KB

  • memory/2672-126-0x00000000054D0000-0x00000000054D1000-memory.dmp

    Filesize

    4KB

  • memory/2672-127-0x0000000005690000-0x0000000005691000-memory.dmp

    Filesize

    4KB

  • memory/2672-128-0x0000000005530000-0x0000000005531000-memory.dmp

    Filesize

    4KB

  • memory/2672-134-0x0000000007F30000-0x0000000007F31000-memory.dmp

    Filesize

    4KB

  • memory/2672-133-0x0000000006FD0000-0x0000000006FD1000-memory.dmp

    Filesize

    4KB

  • memory/2672-122-0x0000000077C70000-0x0000000077DFE000-memory.dmp

    Filesize

    1.6MB

  • memory/2672-131-0x0000000006E00000-0x0000000006E01000-memory.dmp

    Filesize

    4KB

  • memory/2672-130-0x0000000005580000-0x0000000005581000-memory.dmp

    Filesize

    4KB

  • memory/2672-137-0x00000000074D0000-0x00000000074D1000-memory.dmp

    Filesize

    4KB

  • memory/2672-129-0x0000000005570000-0x0000000005571000-memory.dmp

    Filesize

    4KB

  • memory/2696-157-0x00000000004D0000-0x000000000061A000-memory.dmp

    Filesize

    1.3MB

  • memory/3028-152-0x0000000000EF0000-0x0000000000F06000-memory.dmp

    Filesize

    88KB

  • memory/3028-158-0x0000000002CF0000-0x0000000002D06000-memory.dmp

    Filesize

    88KB

  • memory/3028-118-0x0000000000E70000-0x0000000000E86000-memory.dmp

    Filesize

    88KB

  • memory/3028-164-0x0000000002830000-0x0000000002846000-memory.dmp

    Filesize

    88KB

  • memory/4080-144-0x0000000000400000-0x000000000044D000-memory.dmp

    Filesize

    308KB

  • memory/4080-143-0x00000000005D0000-0x00000000005FD000-memory.dmp

    Filesize

    180KB