farfli | 1757d8860d2512ccf522e928c0911c46b44a135344e9ab5cada23be4763c6ef4

Analysis

max time kernel
150s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
02/05/2026, 02:48

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General

Target
2026-05-02_3d3b6c3e693a784c1189d9ce0ddc4769_elex_wannacry.exe
Size 108KB
Sample260502-dascmsct8n
SHA256 1757d8860d2512ccf522e928c0911c46b44a135344e9ab5cada23be4763c6ef4
MD5 3d3b6c3e693a784c1189d9ce0ddc4769
SHA1 248fe59328b11be213da459597b845901b69f449
SHA512 68ea1010765b12db70b845d7cede5bcfc10dc646740455e41e0529680eb6b25287aaf63fc70f9c16dfc6d5203a056285cf62d0130fad462566eed81e95bc3bf9
SSDEEP 1536:agDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIcIWlmyyF:ELRrO10TiJD9yjqrilyxOWPy
TLSH
T168B3AD1D6D52C99FE4014B7047579625A2B2AC19FA304F334380BA5EFF36D0BEEE9198
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery farfli persistence spyware stealer

Malware Config

Signatures

Family: Farfli
Farfli is a Windows backdoor written in C++.
backdoor farfli

Detects Farfli Backdoor 2 IoCs

resource	yara_rule
behavioral2/memory/1984-13-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/1984-19-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/1984-13-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1984-19-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Badlisted process makes network request 8 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
2	1984	rundll32.exe
3	1984	rundll32.exe
4	1984	rundll32.exe
5	1984	rundll32.exe
6	1984	rundll32.exe
8	1984	rundll32.exe
10	1984	rundll32.exe
11	1984	rundll32.exe

Deletes itself 1 IoCs

pid	Process
3116	fgkek.exe

Executes dropped EXE 1 IoCs

pid	Process
3116	fgkek.exe

Loads dropped DLL 1 IoCs

pid	Process
1984	rundll32.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3119821332-640943685-2562343641-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\lldqe\\fqkai.dll\",QueryPluginInterface"	rundll32.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe

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.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PHYSICALDRIVE0	rundll32.exe

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.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-05-02_3d3b6c3e693a784c1189d9ce0ddc4769_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fgkek.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2500	PING.EXE
4892	cmd.exe

Checks processor information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2500	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe
1984	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1984	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2660	2026-05-02_3d3b6c3e693a784c1189d9ce0ddc4769_elex_wannacry.exe
3116	fgkek.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2660 wrote to memory of 4892	2660	2026-05-02_3d3b6c3e693a784c1189d9ce0ddc4769_elex_wannacry.exe	79
PID 4892 wrote to memory of 2500	4892	cmd.exe	81
PID 4892 wrote to memory of 3116	4892	cmd.exe	82
PID 3116 wrote to memory of 1984	3116	fgkek.exe	83

C:\Users\Admin\AppData\Local\Temp\2026-05-02_3d3b6c3e693a784c1189d9ce0ddc4769_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-02_3d3b6c3e693a784c1189d9ce0ddc4769_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2660
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\fgkek.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-02_3d3b6c3e693a784c1189d9ce0ddc4769_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4892
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2500
- - C:\Users\Admin\AppData\Local\Temp\fgkek.exe
    C:\Users\Admin\AppData\Local\Temp\\fgkek.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-02_3d3b6c3e693a784c1189d9ce0ddc4769_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3116
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\lldqe\fqkai.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\fgkek.exe
      4⤵
      Badlisted process makes network request
      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
      PID:1984

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

fgkek.exe

Path C:\Users\Admin\AppData\Local\Temp\fgkek.exe
Size 108KB
SHA256 6acb57d3f369b4dcbc072e2dac4a86431012062d0d15870ce18bec587a55c184
MD5 75bd1f7c19071ec0e1a09ff235cd2359
SHA1 893120745ccb8c3b4057c83ea59b061b3e816488
SHA512 04f753e1bf124be74a37478935013ba6d4fe86f4023b45f6381e6c08756fdabda847b5fba09d6961fcde020530d19efa41785d8ef3e704d1a2924d85b0f0f948
SSDEEP 1536:agDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIcIWlmyyF2:ELRrO10TiJD9yjqrilyxOWPyU
TLSH
T150B3AD1D6D52C99FE4014B7047579625A2A2AC1DFA304F334380BA5EFF36D0BEEE9198
MD5 SHA1 SHA512 SSDEEP TLSH

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fqkai.dll

Path \??\c:\lldqe\fqkai.dll
Size 44KB
SHA256 9111c1eb1f0b59dcd49cfd5a0abc0ba100ac59a3bcae8623ff091dfdc46fed3c
MD5 0f12a7d509b2c9bb9b4cd6d8a0325e86
SHA1 f5fb59ad4f0633d115b06f35a2dc161dc4367157
SHA512 e3c84a643ff0a2627daba8a056221985a472aaf07bade61b3e9459db4bfc8792c1347606911e3fcc01581508004b18b5435bcccd5e7617cc6d091f37a5f42e7f
SSDEEP 768:DICzePjle2367kjhrXLdCuYMW8QVnwrLDGe/brbtJyOTuXfADVjeJ2i/MVJWAE:DDePjA23Ukjh37YMonwrvGybrbbRCf4E
TLSH
T1FD23F1A7B94E8D4FC0AE41F7078FC8D422B5589A97A7CB4626008F216CC4FB07E52376
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1984-11-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/1984-12-0x0000000000AC0000-0x0000000000AC2000-memory.dmp

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memory/1984-13-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/1984-15-0x0000000000AC0000-0x0000000000AC2000-memory.dmp

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memory/1984-14-0x0000000003200000-0x0000000003282000-memory.dmp

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memory/1984-19-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/2660-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/2660-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3116-6-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3116-8-0x0000000000400000-0x0000000000417000-memory.dmp

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