farfli | 33311cb714cfb25a75b25423f8ae70c962495908000cc15f1c6905ca027195a4

Analysis

max time kernel
149s
max time network
154s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
24/04/2026, 11:20

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General

Target
2026-04-24_e85b1eaff3c46b04400e54cc043fe68a_elex_wannacry.exe
Size 96KB
Sample260424-nfph2sf19x
SHA256 33311cb714cfb25a75b25423f8ae70c962495908000cc15f1c6905ca027195a4
MD5 e85b1eaff3c46b04400e54cc043fe68a
SHA1 f1528af40fac4d4c0d855743e58d3f1c7f3caf82
SHA512 5dd31f5a165cc6ca3b719350d27b80876eeb076426aa2b450ea2be58fe70244f0486d9d8ad799e8a06875fe285c5d7d031ed581212c3346b18def6cf388596a2
SSDEEP 1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmy:uLRrO10TiJD9yjqrilyxOuP
TLSH
T1BFA38B1C6962C59EE4054F74434B962097A2AC19FA304F335384BA4EFF36E1BEDE91D8
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 3 IoCs

resource	yara_rule
behavioral2/memory/4348-13-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/4348-17-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/4348-18-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/4348-13-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4348-17-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4348-18-0x0000000010000000-0x0000000010023000-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	4348	rundll32.exe
3	4348	rundll32.exe
4	4348	rundll32.exe
5	4348	rundll32.exe
6	4348	rundll32.exe
7	4348	rundll32.exe
9	4348	rundll32.exe
11	4348	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4852	xqrkrdsf.exe

Executes dropped EXE 1 IoCs

pid	Process
4852	xqrkrdsf.exe

Loads dropped DLL 1 IoCs

pid	Process
4348	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-1-5-21-1383858298-2057492509-1726743289-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\jdnhxurgy\\gaybpuxm.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)	\??\l:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	xqrkrdsf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-24_e85b1eaff3c46b04400e54cc043fe68a_elex_wannacry.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
2504	cmd.exe
4440	PING.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 opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4440	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4348	rundll32.exe
4348	rundll32.exe
4348	rundll32.exe
4348	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4348	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4712	2026-04-24_e85b1eaff3c46b04400e54cc043fe68a_elex_wannacry.exe
4852	xqrkrdsf.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4712 wrote to memory of 2504	4712	2026-04-24_e85b1eaff3c46b04400e54cc043fe68a_elex_wannacry.exe	80
PID 2504 wrote to memory of 4440	2504	cmd.exe	82
PID 2504 wrote to memory of 4852	2504	cmd.exe	83
PID 4852 wrote to memory of 4348	4852	xqrkrdsf.exe	84

C:\Users\Admin\AppData\Local\Temp\2026-04-24_e85b1eaff3c46b04400e54cc043fe68a_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-24_e85b1eaff3c46b04400e54cc043fe68a_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4712
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\xqrkrdsf.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-24_e85b1eaff3c46b04400e54cc043fe68a_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2504
- - 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:4440
- - C:\Users\Admin\AppData\Local\Temp\xqrkrdsf.exe
    C:\Users\Admin\AppData\Local\Temp\\xqrkrdsf.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-24_e85b1eaff3c46b04400e54cc043fe68a_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4852
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\jdnhxurgy\gaybpuxm.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\xqrkrdsf.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:4348

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

xqrkrdsf.exe

Path C:\Users\Admin\AppData\Local\Temp\xqrkrdsf.exe
Size 96KB
SHA256 448535c986ea0cbbef58e07ab919e86a9d2094c8c0dc1378b94d1c17b8fc6385
MD5 4495fdc3f3f6f078d153a99aa06e14e0
SHA1 15f59a0af22d58675fb7e4ad59ae85fb1a757534
SHA512 e31778c9a7af31f863fa2964909da158a7ba5c8ae97a019a16e372bcd8ac896b5e3a519bcf602cae35af89652f1b9393ff0124f46958242f6eaa23955a6abedc
SSDEEP 1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmyK:uLRrO10TiJD9yjqrilyxOuPK
TLSH
T18DA38B1C6962C59EE4015F74434B962097A2AC19FA304F335384BA4EFF36E1BEDE91D8
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

gaybpuxm.dll

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

Submit Download

memory/4348-11-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/4348-12-0x0000000000F20000-0x0000000000F22000-memory.dmp

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memory/4348-13-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/4348-14-0x0000000000F20000-0x0000000000F22000-memory.dmp

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memory/4348-17-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/4348-18-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/4712-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4712-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4852-6-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4852-8-0x0000000000400000-0x0000000000417000-memory.dmp

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