Analysis
- max time kernel
149s - max time network
136s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
15/04/2026, 22:49
General
- Target 2026-04-15_03b8814c3774eb3a921040ed77e8ce10_elex_wannacry.exe
- Size 400KB
- Sample260415-2rnyjsbv2p
- SHA256 4d25105ad74ccfa0c1999a78f144fb28f319761e74a7eb57c3184ed6b87e3418
Malware Config
Signatures
- Family: Farfli
Farfli is a Windows backdoor written in C++.
- Detects Farfli Backdoor 5 IoCs
- Custom signatureDetects executables containing base64 encoded User Agent 5 IoCs
- Deletes itself 1 IoCs
- Executes dropped EXE 2 IoCs
- Loads dropped DLL 1 IoCs
- Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Adds Run key to start application 2 TTPs 1 IoCs
- Enumerates connected drives 3 TTPs 23 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
- Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
- UPX packed file 4 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Drops file in Program Files directory 4 IoCs
- System Location Discovery: System Language Discovery 1 TTPs 5 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs
Adversaries may check for Internet connectivity on compromised systems.
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Runs ping.exe 1 TTPs 1 IoCs
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of SetWindowsHookEx 2 IoCs
- Suspicious use of WriteProcessMemory 4 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-04-15_03b8814c3774eb3a921040ed77e8ce10_elex_wannacry.exe"C:\Users\Admin\AppData\Local\Temp\2026-04-15_03b8814c3774eb3a921040ed77e8ce10_elex_wannacry.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.execmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\naebj.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-15_03b8814c3774eb3a921040ed77e8ce10_elex_wannacry.exe"2⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\PING.EXEping 127.0.0.1 -n 23⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
- Runs ping.exe
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C:\Users\Admin\AppData\Local\Temp\naebj.exeC:\Users\Admin\AppData\Local\Temp\\naebj.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-15_03b8814c3774eb3a921040ed77e8ce10_elex_wannacry.exe"3⤵
- Deletes itself
- Executes dropped EXE
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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\??\c:\Program Files\fcguo\abkonaxbb.exe"c:\Program Files\fcguo\abkonaxbb.exe" "c:\Program Files\fcguo\abkonaxbb.dll",DoPrivacy C:\Users\Admin\AppData\Local\Temp\naebj.exe4⤵
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v16
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Pre-OS Boot
1Bootkit
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1Replay Monitor
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Downloads
abkonaxbb.dll
abkonaxbb.exe
naebj.exe
memory/2228-0-0x0000000000400000-0x0000000000499000-memory.dmp
memory/2228-2-0x0000000000400000-0x0000000000499000-memory.dmp
memory/2720-14-0x0000000010000000-0x000000001005A000-memory.dmp
memory/2720-17-0x0000000010000000-0x000000001005A000-memory.dmp
memory/2720-19-0x0000000000F90000-0x0000000000F91000-memory.dmp
memory/2720-15-0x0000000010000000-0x000000001005A000-memory.dmp
memory/2720-20-0x0000000010000000-0x000000001005A000-memory.dmp
memory/2720-22-0x0000000010000000-0x000000001005A000-memory.dmp
memory/2720-24-0x0000000010000000-0x000000001005A000-memory.dmp
memory/5804-13-0x0000000000400000-0x0000000000499000-memory.dmp