Analysis

  • max time kernel
    151s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15/03/2023, 02:34

General

  • Target

    New Project 1.exe

  • Size

    3.3MB

  • MD5

    0b82679d42cab0b409f8931a42b5b146

  • SHA1

    cb04cd8a5b8a964e02029d4e8c7b58dffb027090

  • SHA256

    c161fdee3b643c98fe1b8f7697e7862343eae67823692a122ec27fe9bf0ce8bb

  • SHA512

    d28e03ae32c4f7cec3cbc0d40c8a295a222b5746ea1e40074ec6bb2cecbe74920f27cd6874450e0d9f851f90bd0a59a758e5752246cfe808863f36108e94dcb8

  • SSDEEP

    49152:OzsaGqHikFPJcC2wxmDK30zBSs0xThNydNqLB7ZhCABTkPe:3wiXC1OB0Kni5JkP

Malware Config

Extracted

Language
ps1
Source
URLs
exe.dropper

https://pastebin.com/raw/vNcCt60A

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

Mutex

Mutex

Attributes
  • delay

    3

  • install

    true

  • install_file

    csrss.exe

  • install_folder

    %AppData%

  • pastebin_config

    https://pastebin.com/raw/3Z9zi18j

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

  • Async RAT payload 5 IoCs
  • Blocklisted process makes network request 3 IoCs
  • Downloads MZ/PE file
  • Sets file to hidden 1 TTPs 1 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Checks computer location settings 2 TTPs 4 IoCs

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

  • Executes dropped EXE 4 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Delays execution with timeout.exe 1 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 25 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\New Project 1.exe
    "C:\Users\Admin\AppData\Local\Temp\New Project 1.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1968
    • C:\Users\Admin\AppData\Local\Temp\Extreme Injector v3.exe
      "C:\Users\Admin\AppData\Local\Temp\Extreme Injector v3.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:2824
    • C:\Users\Admin\AppData\Local\Temp\service.exe
      "C:\Users\Admin\AppData\Local\Temp\service.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:1832
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\RarSFX0\config.vbs"
        3⤵
        • Checks computer location settings
        • Suspicious use of WriteProcessMemory
        PID:3028
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Unrestricted -nologo -command .\service.ps1
          4⤵
          • Blocklisted process makes network request
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1652
          • C:\Windows\SysWOW64\attrib.exe
            "C:\Windows\system32\attrib.exe" +s +h C:\Users\Admin\AppData\Local\Temp\tmp5DD7.exe
            5⤵
            • Sets file to hidden
            • Views/modifies file attributes
            PID:756
          • C:\Users\Admin\AppData\Local\Temp\tmp5DD7.exe
            "C:\Users\Admin\AppData\Local\Temp\tmp5DD7.exe"
            5⤵
            • Checks computer location settings
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of WriteProcessMemory
            PID:2728
            • C:\Windows\System32\cmd.exe
              "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "csrss" /tr '"C:\Users\Admin\AppData\Roaming\csrss.exe"' & exit
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:1816
              • C:\Windows\system32\schtasks.exe
                schtasks /create /f /sc onlogon /rl highest /tn "csrss" /tr '"C:\Users\Admin\AppData\Roaming\csrss.exe"'
                7⤵
                • Creates scheduled task(s)
                PID:216
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp58DE.tmp.bat""
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:3860
              • C:\Windows\system32\timeout.exe
                timeout 3
                7⤵
                • Delays execution with timeout.exe
                PID:3784
              • C:\Users\Admin\AppData\Roaming\csrss.exe
                "C:\Users\Admin\AppData\Roaming\csrss.exe"
                7⤵
                • Executes dropped EXE
                PID:2228

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\Extreme Injector v3.exe

          Filesize

          1.9MB

          MD5

          ec801a7d4b72a288ec6c207bb9ff0131

          SHA1

          32eec2ae1f9e201516fa7fcdc16c4928f7997561

          SHA256

          b65f40618f584303ca0bcf9b5f88c233cc4237699c0c4bf40ba8facbe8195a46

          SHA512

          a07dd5e8241de73ce65ff8d74acef4942b85fc45cf6a7baafd3c0f9d330b08e7412f2023ba667e99b40e732a65e8fb4389f7fe73c7b6256ca71e63afe46cdcac

        • C:\Users\Admin\AppData\Local\Temp\Extreme Injector v3.exe

          Filesize

          1.9MB

          MD5

          ec801a7d4b72a288ec6c207bb9ff0131

          SHA1

          32eec2ae1f9e201516fa7fcdc16c4928f7997561

          SHA256

          b65f40618f584303ca0bcf9b5f88c233cc4237699c0c4bf40ba8facbe8195a46

          SHA512

          a07dd5e8241de73ce65ff8d74acef4942b85fc45cf6a7baafd3c0f9d330b08e7412f2023ba667e99b40e732a65e8fb4389f7fe73c7b6256ca71e63afe46cdcac

        • C:\Users\Admin\AppData\Local\Temp\Extreme Injector v3.exe

          Filesize

          1.9MB

          MD5

          ec801a7d4b72a288ec6c207bb9ff0131

          SHA1

          32eec2ae1f9e201516fa7fcdc16c4928f7997561

          SHA256

          b65f40618f584303ca0bcf9b5f88c233cc4237699c0c4bf40ba8facbe8195a46

          SHA512

          a07dd5e8241de73ce65ff8d74acef4942b85fc45cf6a7baafd3c0f9d330b08e7412f2023ba667e99b40e732a65e8fb4389f7fe73c7b6256ca71e63afe46cdcac

        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\config.vbs

          Filesize

          147B

          MD5

          e04e55d2e6cc3d920631fdc5d6dcc1ce

          SHA1

          2c4dbcff71f8678623a7c197440ec281804dc5a5

          SHA256

          f641a99ec7e549970c81d724766f2a60ff031a5ec92aa6fc84228c82eeb4b4eb

          SHA512

          9511fe4dc599187f4539b8cda476550c54e86cbfcaca339a5db12e980ec322bf488d7458bf76089aa1d845f164f7ddb8adea017923d9a4930b9e821b7a4ae998

        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\service.ps1

          Filesize

          797B

          MD5

          eb9c76ab230c2b8527d504429d7aca20

          SHA1

          ca4fc2fcb5023fa8398fc5a0c15e7ad23a61e8cb

          SHA256

          f985277690d6c85a064bc5d494d20d0774fb5017eaf7874685378c538bd49dbf

          SHA512

          f791797d8301242f2334767153ae7133193cee75538ce38b9d5fa5b60388428a8808c22eb08dd070f6f7e3ce556cf1f04883285eaa44ddf8aba1bd67886429c2

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ykklyj0m.y4v.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

          Filesize

          283KB

          MD5

          cc9cbbfa9ccc9cefe75253c65ad22405

          SHA1

          f126e2c4431a9eacab858316eaf031fb5e7bc9f1

          SHA256

          4d19771fb289f892626b1b04c120f53d69492ec87df2bfd6809dd6fce8662c3c

          SHA512

          bbc779e3daf6d9dcf249ba59d99feb34a62fe7f381d74b608fcc8719806eef88a04491983623417c9560f2dfc4858f6e8ec12362cf93e57ca3a78e1984ba2e17

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

          Filesize

          283KB

          MD5

          cc9cbbfa9ccc9cefe75253c65ad22405

          SHA1

          f126e2c4431a9eacab858316eaf031fb5e7bc9f1

          SHA256

          4d19771fb289f892626b1b04c120f53d69492ec87df2bfd6809dd6fce8662c3c

          SHA512

          bbc779e3daf6d9dcf249ba59d99feb34a62fe7f381d74b608fcc8719806eef88a04491983623417c9560f2dfc4858f6e8ec12362cf93e57ca3a78e1984ba2e17

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

          Filesize

          283KB

          MD5

          cc9cbbfa9ccc9cefe75253c65ad22405

          SHA1

          f126e2c4431a9eacab858316eaf031fb5e7bc9f1

          SHA256

          4d19771fb289f892626b1b04c120f53d69492ec87df2bfd6809dd6fce8662c3c

          SHA512

          bbc779e3daf6d9dcf249ba59d99feb34a62fe7f381d74b608fcc8719806eef88a04491983623417c9560f2dfc4858f6e8ec12362cf93e57ca3a78e1984ba2e17

        • C:\Users\Admin\AppData\Local\Temp\tmp58DE.tmp.bat

          Filesize

          149B

          MD5

          6f9234da5a9ae3c66f69c7e2487acead

          SHA1

          43236b786f551b4b437bc18acfc3732cf7689995

          SHA256

          2b86d74b1df8253a402650edc25c15e2cb2d50f1010d67e61513f9669ed1e570

          SHA512

          4942a3919de4c8b57023b906a939abd3f0144b467bcb4728cb17d1f4c6c9059db061dd43cf314297e849c3a1aaed5c3fc659310f3510f1f8dbe5e5fcd40dc21d

        • C:\Users\Admin\AppData\Local\Temp\tmp5DD7.exe

          Filesize

          63KB

          MD5

          d2053aeb9216c3040b40e67d72578669

          SHA1

          3a33aab579e13bac21c4966b4e2491cee400155f

          SHA256

          8bd23941838cd09c9e3aba327a8ab6e8d78f2d5325ec790ec30e2963420ab2df

          SHA512

          8baf916842fc62aa743ca62851130d9552da8c3edc90d8b468bd154454bc643bb9d6474301a5414bccdd381d743b0dcaccb9683f7571b9f06d216a3ee754518f

        • C:\Users\Admin\AppData\Local\Temp\tmp5DD7.exe

          Filesize

          63KB

          MD5

          d2053aeb9216c3040b40e67d72578669

          SHA1

          3a33aab579e13bac21c4966b4e2491cee400155f

          SHA256

          8bd23941838cd09c9e3aba327a8ab6e8d78f2d5325ec790ec30e2963420ab2df

          SHA512

          8baf916842fc62aa743ca62851130d9552da8c3edc90d8b468bd154454bc643bb9d6474301a5414bccdd381d743b0dcaccb9683f7571b9f06d216a3ee754518f

        • C:\Users\Admin\AppData\Roaming\csrss.exe

          Filesize

          63KB

          MD5

          d2053aeb9216c3040b40e67d72578669

          SHA1

          3a33aab579e13bac21c4966b4e2491cee400155f

          SHA256

          8bd23941838cd09c9e3aba327a8ab6e8d78f2d5325ec790ec30e2963420ab2df

          SHA512

          8baf916842fc62aa743ca62851130d9552da8c3edc90d8b468bd154454bc643bb9d6474301a5414bccdd381d743b0dcaccb9683f7571b9f06d216a3ee754518f

        • C:\Users\Admin\AppData\Roaming\csrss.exe

          Filesize

          63KB

          MD5

          d2053aeb9216c3040b40e67d72578669

          SHA1

          3a33aab579e13bac21c4966b4e2491cee400155f

          SHA256

          8bd23941838cd09c9e3aba327a8ab6e8d78f2d5325ec790ec30e2963420ab2df

          SHA512

          8baf916842fc62aa743ca62851130d9552da8c3edc90d8b468bd154454bc643bb9d6474301a5414bccdd381d743b0dcaccb9683f7571b9f06d216a3ee754518f

        • memory/1652-190-0x0000000008B60000-0x00000000091DA000-memory.dmp

          Filesize

          6.5MB

        • memory/1652-206-0x00000000086F0000-0x000000000870E000-memory.dmp

          Filesize

          120KB

        • memory/1652-170-0x00000000057E0000-0x0000000005802000-memory.dmp

          Filesize

          136KB

        • memory/1652-171-0x0000000005FB0000-0x0000000006016000-memory.dmp

          Filesize

          408KB

        • memory/1652-166-0x0000000002DA0000-0x0000000002DD6000-memory.dmp

          Filesize

          216KB

        • memory/1652-172-0x0000000006090000-0x00000000060F6000-memory.dmp

          Filesize

          408KB

        • memory/1652-182-0x00000000066B0000-0x00000000066CE000-memory.dmp

          Filesize

          120KB

        • memory/1652-213-0x0000000005340000-0x0000000005350000-memory.dmp

          Filesize

          64KB

        • memory/1652-168-0x0000000005340000-0x0000000005350000-memory.dmp

          Filesize

          64KB

        • memory/1652-185-0x0000000005340000-0x0000000005350000-memory.dmp

          Filesize

          64KB

        • memory/1652-186-0x0000000007680000-0x0000000007716000-memory.dmp

          Filesize

          600KB

        • memory/1652-187-0x0000000006BE0000-0x0000000006BFA000-memory.dmp

          Filesize

          104KB

        • memory/1652-188-0x0000000006C30000-0x0000000006C52000-memory.dmp

          Filesize

          136KB

        • memory/1652-189-0x0000000007F30000-0x00000000084D4000-memory.dmp

          Filesize

          5.6MB

        • memory/1652-212-0x00000000089E0000-0x00000000089E8000-memory.dmp

          Filesize

          32KB

        • memory/1652-191-0x00000000079E0000-0x0000000007A12000-memory.dmp

          Filesize

          200KB

        • memory/1652-211-0x00000000089F0000-0x0000000008A0A000-memory.dmp

          Filesize

          104KB

        • memory/1652-210-0x00000000089A0000-0x00000000089AE000-memory.dmp

          Filesize

          56KB

        • memory/1652-194-0x0000000005340000-0x0000000005350000-memory.dmp

          Filesize

          64KB

        • memory/1652-195-0x0000000005340000-0x0000000005350000-memory.dmp

          Filesize

          64KB

        • memory/1652-196-0x000000006F120000-0x000000006F16C000-memory.dmp

          Filesize

          304KB

        • memory/1652-169-0x0000000005980000-0x0000000005FA8000-memory.dmp

          Filesize

          6.2MB

        • memory/1652-207-0x000000007FDF0000-0x000000007FE00000-memory.dmp

          Filesize

          64KB

        • memory/1652-208-0x0000000008820000-0x000000000882A000-memory.dmp

          Filesize

          40KB

        • memory/1968-133-0x0000000000400000-0x0000000000744000-memory.dmp

          Filesize

          3.3MB

        • memory/2728-220-0x0000000000C40000-0x0000000000C50000-memory.dmp

          Filesize

          64KB

        • memory/2728-217-0x00000000006E0000-0x00000000006F6000-memory.dmp

          Filesize

          88KB

        • memory/2824-183-0x000000001BC80000-0x000000001BC90000-memory.dmp

          Filesize

          64KB

        • memory/2824-155-0x000000001BC80000-0x000000001BC90000-memory.dmp

          Filesize

          64KB

        • memory/2824-167-0x000000001BC80000-0x000000001BC90000-memory.dmp

          Filesize

          64KB

        • memory/2824-164-0x000000001DC20000-0x000000001DC5C000-memory.dmp

          Filesize

          240KB

        • memory/2824-192-0x000000001BC80000-0x000000001BC90000-memory.dmp

          Filesize

          64KB

        • memory/2824-193-0x000000001BC80000-0x000000001BC90000-memory.dmp

          Filesize

          64KB

        • memory/2824-163-0x000000001D190000-0x000000001D1A2000-memory.dmp

          Filesize

          72KB

        • memory/2824-209-0x000000001BC80000-0x000000001BC90000-memory.dmp

          Filesize

          64KB

        • memory/2824-152-0x0000000000E30000-0x0000000001016000-memory.dmp

          Filesize

          1.9MB

        • memory/2824-229-0x000000001BC80000-0x000000001BC90000-memory.dmp

          Filesize

          64KB

        • memory/2824-230-0x000000001BC80000-0x000000001BC90000-memory.dmp

          Filesize

          64KB

        • memory/2824-231-0x000000001BC80000-0x000000001BC90000-memory.dmp

          Filesize

          64KB

        • memory/2824-232-0x000000001BC80000-0x000000001BC90000-memory.dmp

          Filesize

          64KB

        • memory/2824-233-0x000000001BC80000-0x000000001BC90000-memory.dmp

          Filesize

          64KB

        • memory/2824-234-0x000000001BC80000-0x000000001BC90000-memory.dmp

          Filesize

          64KB

        • memory/2824-235-0x00000000016B0000-0x00000000017B0000-memory.dmp

          Filesize

          1024KB