General
Target

8ec118f1e1f0b80207b38ce9c47868a13e136e07fca2a39fcd7944ebb5b6d90b.exe

Filesize

284KB

Completed

24-01-2022 01:20

Task

behavioral1

Score
10/10
MD5

859dd564770fd5d85f5ae3a337339f94

SHA1

31ffb57ec8c76bb54e072746f9fcd2635d430a3f

SHA256

8ec118f1e1f0b80207b38ce9c47868a13e136e07fca2a39fcd7944ebb5b6d90b

SHA256

f5d4d59c75cf536287a06af0a626ea17284b8d1a990405ccc0f00f5ecbebae9b28d1c9a1f3835c35048388fb54da91db89304335b948f28808535ae0c501c03e

Malware Config

Extracted

Family

arkei

Botnet

Default

C2

http://homesteadr.link/ggate.php

Signatures 19

Filter: none

Collection
Credential Access
Defense Evasion
Discovery
Persistence
  • Arkei

    Description

    Arkei is an infostealer written in C++.

  • Suspicious use of NtCreateProcessExOtherParentProcess
    WerFault.exe

    Reported IOCs

    descriptionpidprocesstarget process
    PID 224 created 2436224WerFault.exe8ec118f1e1f0b80207b38ce9c47868a13e136e07fca2a39fcd7944ebb5b6d90b.exe
  • Arkei Stealer Payload

    Tags

    Reported IOCs

    resourceyara_rule
    behavioral1/memory/2436-131-0x00000000006C0000-0x00000000006DC000-memory.dmpfamily_arkei
    behavioral1/memory/2436-132-0x0000000000400000-0x000000000044F000-memory.dmpfamily_arkei
  • Downloads MZ/PE file
  • Sets service image path in registry

    TTPs

    Registry Run Keys / Startup FolderModify Registry
  • Checks computer location settings
    8ec118f1e1f0b80207b38ce9c47868a13e136e07fca2a39fcd7944ebb5b6d90b.exe

    Description

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

    TTPs

    Query RegistrySystem Information Discovery

    Reported IOCs

    descriptioniocprocess
    Key value queried\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation8ec118f1e1f0b80207b38ce9c47868a13e136e07fca2a39fcd7944ebb5b6d90b.exe
  • Loads dropped DLL
    8ec118f1e1f0b80207b38ce9c47868a13e136e07fca2a39fcd7944ebb5b6d90b.exe

    Reported IOCs

    pidprocess
    24368ec118f1e1f0b80207b38ce9c47868a13e136e07fca2a39fcd7944ebb5b6d90b.exe
    24368ec118f1e1f0b80207b38ce9c47868a13e136e07fca2a39fcd7944ebb5b6d90b.exe
    24368ec118f1e1f0b80207b38ce9c47868a13e136e07fca2a39fcd7944ebb5b6d90b.exe
  • Reads user/profile data of web browsers

    Description

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

    TTPs

    Data from Local SystemCredentials in Files
  • Accesses cryptocurrency files/wallets, possible credential harvesting

    Tags

    TTPs

    Data from Local SystemCredentials in Files
  • Checks installed software on the system

    Description

    Looks up Uninstall key entries in the registry to enumerate software on the system.

    Tags

    TTPs

    Query Registry
  • Enumerates physical storage devices

    Description

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

    TTPs

    System Information Discovery
  • Program crash
    WerFault.exe

    Reported IOCs

    pidpid_targetprocesstarget process
    15562436WerFault.exe8ec118f1e1f0b80207b38ce9c47868a13e136e07fca2a39fcd7944ebb5b6d90b.exe
  • Checks processor information in registry
    8ec118f1e1f0b80207b38ce9c47868a13e136e07fca2a39fcd7944ebb5b6d90b.exeWerFault.exe

    Description

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

    TTPs

    Query RegistrySystem Information Discovery

    Reported IOCs

    descriptioniocprocess
    Key opened\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\08ec118f1e1f0b80207b38ce9c47868a13e136e07fca2a39fcd7944ebb5b6d90b.exe
    Key value queried\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString8ec118f1e1f0b80207b38ce9c47868a13e136e07fca2a39fcd7944ebb5b6d90b.exe
    Key opened\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0WerFault.exe
    Key value queried\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHzWerFault.exe
    Key value queried\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameStringWerFault.exe
  • Delays execution with timeout.exe
    timeout.exe

    Tags

    Reported IOCs

    pidprocess
    4048timeout.exe
  • Enumerates system info in registry
    WerFault.exe

    TTPs

    Query RegistrySystem Information Discovery

    Reported IOCs

    descriptioniocprocess
    Key opened\REGISTRY\MACHINE\Hardware\Description\System\BIOSWerFault.exe
    Key value queried\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKUWerFault.exe
  • Modifies data under HKEY_USERS
    WaaSMedicAgent.exe

    Reported IOCs

    descriptioniocprocess
    Key created\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLsWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\DisallowedWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CertificatesWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLsWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLsWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CertificatesWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CAWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CAWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLsWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CertificatesWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CertificatesWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software PublishingWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CertificatesWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLsWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLsWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLsWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CertificatesWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLsWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLsWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trustWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CertificatesWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLsWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\DisallowedWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLsWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLsWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trustWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLsWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRootWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeopleWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLsWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLsWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CertificatesWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLsWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLsWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CertificatesWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLsWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CertificatesWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\RootWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLsWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLsWaaSMedicAgent.exe
    Key created\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeopleWaaSMedicAgent.exe
  • Suspicious behavior: EnumeratesProcesses
    WerFault.exe

    Reported IOCs

    pidprocess
    1556WerFault.exe
    1556WerFault.exe
  • Suspicious use of AdjustPrivilegeToken
    WerFault.exe

    Reported IOCs

    descriptionpidprocess
    Token: SeRestorePrivilege1556WerFault.exe
    Token: SeBackupPrivilege1556WerFault.exe
  • Suspicious use of WriteProcessMemory
    8ec118f1e1f0b80207b38ce9c47868a13e136e07fca2a39fcd7944ebb5b6d90b.execmd.exeWerFault.exe

    Reported IOCs

    descriptionpidprocesstarget process
    PID 2436 wrote to memory of 291224368ec118f1e1f0b80207b38ce9c47868a13e136e07fca2a39fcd7944ebb5b6d90b.execmd.exe
    PID 2436 wrote to memory of 291224368ec118f1e1f0b80207b38ce9c47868a13e136e07fca2a39fcd7944ebb5b6d90b.execmd.exe
    PID 2436 wrote to memory of 291224368ec118f1e1f0b80207b38ce9c47868a13e136e07fca2a39fcd7944ebb5b6d90b.execmd.exe
    PID 2912 wrote to memory of 40482912cmd.exetimeout.exe
    PID 2912 wrote to memory of 40482912cmd.exetimeout.exe
    PID 2912 wrote to memory of 40482912cmd.exetimeout.exe
    PID 224 wrote to memory of 2436224WerFault.exe8ec118f1e1f0b80207b38ce9c47868a13e136e07fca2a39fcd7944ebb5b6d90b.exe
    PID 224 wrote to memory of 2436224WerFault.exe8ec118f1e1f0b80207b38ce9c47868a13e136e07fca2a39fcd7944ebb5b6d90b.exe
Processes 6
  • C:\Users\Admin\AppData\Local\Temp\8ec118f1e1f0b80207b38ce9c47868a13e136e07fca2a39fcd7944ebb5b6d90b.exe
    "C:\Users\Admin\AppData\Local\Temp\8ec118f1e1f0b80207b38ce9c47868a13e136e07fca2a39fcd7944ebb5b6d90b.exe"
    Checks computer location settings
    Loads dropped DLL
    Checks processor information in registry
    Suspicious use of WriteProcessMemory
    PID:2436
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\8ec118f1e1f0b80207b38ce9c47868a13e136e07fca2a39fcd7944ebb5b6d90b.exe" & exit
      Suspicious use of WriteProcessMemory
      PID:2912
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 5
        Delays execution with timeout.exe
        PID:4048
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2436 -s 1568
      Program crash
      Checks processor information in registry
      Enumerates system info in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1556
  • C:\Windows\System32\WaaSMedicAgent.exe
    C:\Windows\System32\WaaSMedicAgent.exe 488063e06a9cfc79c80a365c25dfadf0 u3pCchQsYkujnCz7FYwSeA.0.1.0.0.0
    Modifies data under HKEY_USERS
    PID:1832
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2436 -ip 2436
    Suspicious use of NtCreateProcessExOtherParentProcess
    Suspicious use of WriteProcessMemory
    PID:224
Network
MITRE ATT&CK Matrix
Command and Control
    Credential Access
    Defense Evasion
    Execution
      Exfiltration
        Impact
          Initial Access
            Lateral Movement
              Privilege Escalation
                Replay Monitor
                00:00 00:00
                Downloads
                • C:\ProgramData\mozglue.dll

                  MD5

                  8f73c08a9660691143661bf7332c3c27

                  SHA1

                  37fa65dd737c50fda710fdbde89e51374d0c204a

                  SHA256

                  3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

                  SHA512

                  0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

                • C:\ProgramData\nss3.dll

                  MD5

                  bfac4e3c5908856ba17d41edcd455a51

                  SHA1

                  8eec7e888767aa9e4cca8ff246eb2aacb9170428

                  SHA256

                  e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

                  SHA512

                  2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

                • C:\ProgramData\sqlite3.dll

                  MD5

                  e477a96c8f2b18d6b5c27bde49c990bf

                  SHA1

                  e980c9bf41330d1e5bd04556db4646a0210f7409

                  SHA256

                  16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660

                  SHA512

                  335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

                • memory/2436-130-0x0000000000540000-0x0000000000551000-memory.dmp

                • memory/2436-131-0x00000000006C0000-0x00000000006DC000-memory.dmp

                • memory/2436-132-0x0000000000400000-0x000000000044F000-memory.dmp