Analysis

  • max time kernel
    151s
  • max time network
    184s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    28-09-2021 05:22

General

  • Target

    133c10454108aa86301f79a03aa24046.exe

  • Size

    650KB

  • MD5

    133c10454108aa86301f79a03aa24046

  • SHA1

    21439179cb8700406d57332079ab311d08b0c9bf

  • SHA256

    de0cb500125d733becbdeb53cf7b3f1bace4dc91e54805007718970124ef6797

  • SHA512

    8b2a492a5732c89c2e347270e9b1df4db26b79fefd6feae115b35a22b0851c7973fb0ecc9b6c6187791bf720d71a7b69374d81abf63f0ed73faed4efbee79fbe

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

18

C2

185.157.160.136:1973

Mutex

df4Rtg34dFjwr

Attributes
  • anti_vm

    false

  • bsod

    false

  • delay

    3

  • install

    false

  • install_folder

    %AppData%

  • pastebin_config

    null

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers.

  • BitRAT

    BitRAT is a remote access tool written in C++ and uses leaked source code from other families.

  • BitRAT Payload 3 IoCs
  • XenArmor Suite

    XenArmor is as suite of password recovery tools for various application.

  • ACProtect 1.3x - 1.4x DLL software 2 IoCs

    Detects file using ACProtect software.

  • Async RAT payload 4 IoCs
  • Executes dropped EXE 1 IoCs
  • UPX packed file 2 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Loads dropped DLL 3 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads local data of messenger clients 2 TTPs

    Infostealers often target stored data of messaging applications, which can include saved credentials and account information.

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • 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 4 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Drops file in Windows directory 26 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 61 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\133c10454108aa86301f79a03aa24046.exe
    "C:\Users\Admin\AppData\Local\Temp\133c10454108aa86301f79a03aa24046.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1652
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1608
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c start /b powershell –ExecutionPolicy Bypass Start-Process -FilePath '"C:\Users\Admin\AppData\Local\Temp\ilsqvi.exe"' & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1688
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell –ExecutionPolicy Bypass Start-Process -FilePath '"C:\Users\Admin\AppData\Local\Temp\ilsqvi.exe"'
          4⤵
          • Loads dropped DLL
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:668
          • C:\Users\Admin\AppData\Local\Temp\ilsqvi.exe
            "C:\Users\Admin\AppData\Local\Temp\ilsqvi.exe"
            5⤵
            • Executes dropped EXE
            • Adds Run key to start application
            • Suspicious use of SetThreadContext
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:1768
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
              "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
              6⤵
              • Suspicious use of NtSetInformationThreadHideFromDebugger
              • Suspicious use of SetThreadContext
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of SetWindowsHookEx
              • Suspicious use of WriteProcessMemory
              PID:640
              • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
                -a "C:\Users\Admin\AppData\Local\acfb42a5\plg\a1YihafY.json"
                7⤵
                • Suspicious use of SetThreadContext
                • Drops file in Windows directory
                • Suspicious use of WriteProcessMemory
                PID:1940
                • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
                  -a "C:\Users\Admin\AppData\Local\Temp\unk.xml"
                  8⤵
                  • Loads dropped DLL
                  • Drops file in Windows directory
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1580

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Credential Access

Credentials in Files

4
T1081

Discovery

System Information Discovery

1
T1082

Collection

Data from Local System

4
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\ilsqvi.exe
    MD5

    bdc628b212725c5fd4287591393cb44e

    SHA1

    ae1d2f0c1480c0cbd02703d41ae76c36fc011be8

    SHA256

    78f869f3203033c6b2d25c30d545f8bb6d701357b4d870e2707f92a68790dce9

    SHA512

    6edca221ccc9db764a88898ca1aa7ff6c3e50c4720321ea59c811d7876749428aef9261486f7ac7b1d6c0ddefa1b6399a105449885c7d20ca591ca3645a1fadd

  • C:\Users\Admin\AppData\Local\Temp\ilsqvi.exe
    MD5

    bdc628b212725c5fd4287591393cb44e

    SHA1

    ae1d2f0c1480c0cbd02703d41ae76c36fc011be8

    SHA256

    78f869f3203033c6b2d25c30d545f8bb6d701357b4d870e2707f92a68790dce9

    SHA512

    6edca221ccc9db764a88898ca1aa7ff6c3e50c4720321ea59c811d7876749428aef9261486f7ac7b1d6c0ddefa1b6399a105449885c7d20ca591ca3645a1fadd

  • C:\Users\Admin\AppData\Local\Temp\unk.xml
    MD5

    67efe59fbf8aaf3e8de7d67dab21c2a7

    SHA1

    0869d3ea3b16639ed4a0803acea1c476e199b16c

    SHA256

    63ca5c5c3cf4be4765115926225c060d89ef54d6f6fc3ec284cb3ecb398b0cb1

    SHA512

    75f162ff2cc23dd7df018109264f157727fdecc869e3f493e4d0bed26b4429ab00fc9724a5ea420488ba1b4b102a07992357c0d3567c7acea6dd5333cd8cebbb

  • C:\Users\Admin\AppData\Local\acfb42a5\plg\a1YihafY.json
    MD5

    67efe59fbf8aaf3e8de7d67dab21c2a7

    SHA1

    0869d3ea3b16639ed4a0803acea1c476e199b16c

    SHA256

    63ca5c5c3cf4be4765115926225c060d89ef54d6f6fc3ec284cb3ecb398b0cb1

    SHA512

    75f162ff2cc23dd7df018109264f157727fdecc869e3f493e4d0bed26b4429ab00fc9724a5ea420488ba1b4b102a07992357c0d3567c7acea6dd5333cd8cebbb

  • C:\Windows\Microsoft.NET\Framework\v4.0.30319\License.XenArmor
    MD5

    4f3bde9212e17ef18226866d6ac739b6

    SHA1

    732733bec8314beb81437e60876ffa75e72ae6cd

    SHA256

    212173a405c78d70f90e8ec0699a60ed2f4a9f3a8070de62eabd666c268fb174

    SHA512

    10b7cdae0b9a7b0f8e1bfc66a60675fa9b25c523864d5ae3da243f4e6e4c5194f3bd92af57ac956157442f66414bdd3393d0a1e5ba4ef0f192561e8524d4e744

  • C:\Windows\Microsoft.NET\Framework\v4.0.30319\License.XenArmor
    MD5

    bf5da170f7c9a8eae88d1cb1a191ff80

    SHA1

    dd1b991a1b03587a5d1edc94e919a2070e325610

    SHA256

    e5d5110feb21939d82d962981aeaaafc4643b40a9b87cbed800ace82135d57cd

    SHA512

    9e32247d8556fd6efffbf7b6b9c325652d8c4b223b0fa38020879171476a49ab1f64d8897b5d8d92b79c5484fd9d5899be26ca5f664ee1f9c2acb0857084121e

  • C:\Windows\Microsoft.NET\Framework\v4.0.30319\Unknown.dll
    MD5

    86114faba7e1ec4a667d2bcb2e23f024

    SHA1

    670df6e1ba1dc6bece046e8b2e573dd36748245e

    SHA256

    568da887725ccfdc4c5aae3ff66792fe60eca4e0818338f6a8434be66a6fe46d

    SHA512

    d26ee0da6ccd4022982cf848c46e40f6781b667e39d0c5daf5ea8d74c44e55c55a5f7590a4d2a60aa1911358ca783c4276a9b4e6311c4cea20df1ebd4f7f457f

  • \Users\Admin\AppData\Local\Temp\ilsqvi.exe
    MD5

    bdc628b212725c5fd4287591393cb44e

    SHA1

    ae1d2f0c1480c0cbd02703d41ae76c36fc011be8

    SHA256

    78f869f3203033c6b2d25c30d545f8bb6d701357b4d870e2707f92a68790dce9

    SHA512

    6edca221ccc9db764a88898ca1aa7ff6c3e50c4720321ea59c811d7876749428aef9261486f7ac7b1d6c0ddefa1b6399a105449885c7d20ca591ca3645a1fadd

  • \Users\Admin\AppData\Local\Temp\ilsqvi.exe
    MD5

    bdc628b212725c5fd4287591393cb44e

    SHA1

    ae1d2f0c1480c0cbd02703d41ae76c36fc011be8

    SHA256

    78f869f3203033c6b2d25c30d545f8bb6d701357b4d870e2707f92a68790dce9

    SHA512

    6edca221ccc9db764a88898ca1aa7ff6c3e50c4720321ea59c811d7876749428aef9261486f7ac7b1d6c0ddefa1b6399a105449885c7d20ca591ca3645a1fadd

  • \Windows\Microsoft.NET\Framework\v4.0.30319\Unknown.dll
    MD5

    86114faba7e1ec4a667d2bcb2e23f024

    SHA1

    670df6e1ba1dc6bece046e8b2e573dd36748245e

    SHA256

    568da887725ccfdc4c5aae3ff66792fe60eca4e0818338f6a8434be66a6fe46d

    SHA512

    d26ee0da6ccd4022982cf848c46e40f6781b667e39d0c5daf5ea8d74c44e55c55a5f7590a4d2a60aa1911358ca783c4276a9b4e6311c4cea20df1ebd4f7f457f

  • memory/640-106-0x0000000000400000-0x00000000007CE000-memory.dmp
    Filesize

    3.8MB

  • memory/640-104-0x000000000068A488-mapping.dmp
  • memory/640-103-0x0000000000400000-0x00000000007CE000-memory.dmp
    Filesize

    3.8MB

  • memory/668-74-0x0000000004700000-0x0000000004701000-memory.dmp
    Filesize

    4KB

  • memory/668-75-0x0000000002200000-0x0000000002E4A000-memory.dmp
    Filesize

    12.3MB

  • memory/668-86-0x0000000005750000-0x0000000005751000-memory.dmp
    Filesize

    4KB

  • memory/668-93-0x0000000006250000-0x0000000006251000-memory.dmp
    Filesize

    4KB

  • memory/668-94-0x000000007EF30000-0x000000007EF31000-memory.dmp
    Filesize

    4KB

  • memory/668-80-0x0000000005660000-0x0000000005661000-memory.dmp
    Filesize

    4KB

  • memory/668-77-0x0000000005240000-0x0000000005241000-memory.dmp
    Filesize

    4KB

  • memory/668-76-0x0000000002690000-0x0000000002691000-memory.dmp
    Filesize

    4KB

  • memory/668-85-0x0000000005700000-0x0000000005701000-memory.dmp
    Filesize

    4KB

  • memory/668-71-0x0000000000000000-mapping.dmp
  • memory/668-73-0x0000000000940000-0x0000000000941000-memory.dmp
    Filesize

    4KB

  • memory/1580-111-0x0000000000400000-0x00000000006FE000-memory.dmp
    Filesize

    3.0MB

  • memory/1580-112-0x00000000006FC1D0-mapping.dmp
  • memory/1580-114-0x0000000000400000-0x00000000006FE000-memory.dmp
    Filesize

    3.0MB

  • memory/1608-69-0x0000000000830000-0x000000000084B000-memory.dmp
    Filesize

    108KB

  • memory/1608-64-0x000000000040C68E-mapping.dmp
  • memory/1608-66-0x0000000000400000-0x0000000000412000-memory.dmp
    Filesize

    72KB

  • memory/1608-68-0x0000000001320000-0x0000000001321000-memory.dmp
    Filesize

    4KB

  • memory/1608-63-0x0000000000400000-0x0000000000412000-memory.dmp
    Filesize

    72KB

  • memory/1652-62-0x0000000076641000-0x0000000076643000-memory.dmp
    Filesize

    8KB

  • memory/1688-70-0x0000000000000000-mapping.dmp
  • memory/1768-98-0x0000000000000000-mapping.dmp
  • memory/1940-110-0x0000000000400000-0x00000000008DC000-memory.dmp
    Filesize

    4.9MB

  • memory/1940-108-0x00000000008D9FE0-mapping.dmp
  • memory/1940-107-0x0000000000400000-0x00000000008DC000-memory.dmp
    Filesize

    4.9MB