farfli | d062911b1e9eaf2e820c748c850af5486e99458eaf7aa8d5d62400c7b54f92b7

Analysis

max time kernel
150s
max time network
149s
platform
windows11-21h2_x64
resource
win11-20260513-en
resource tags

arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
22/05/2026, 18:47

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General

Target
2026-05-22_efcc1526fe87106dd25248c066b2483b_elex_wannacry.exe
Size 92KB
Sample260522-xe98ssdv2k
SHA256 d062911b1e9eaf2e820c748c850af5486e99458eaf7aa8d5d62400c7b54f92b7
MD5 efcc1526fe87106dd25248c066b2483b
SHA1 2270621ea2cef361c3f8690373789b28e88b4c38
SHA512 76a7acad735e4292fe756676031e6eecbdef30a6d274e71053e6ae8cad3cf442877afc00ddb8fbb3cde795045bf690b221a60f623502d0f560ae300a9f4cddc6
SSDEEP 1536:TSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzlV:eSABNx6vb4RoI4pyjHYLhal01UoPX+hk
TLSH
T16293BE07ABA589C9F1217C30556E373487BFA85D3F1457979348EE4EA833D80EC3628A
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 4 IoCs

resource	yara_rule
behavioral2/memory/6012-10-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral2/memory/6012-11-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli
behavioral2/memory/6012-12-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral2/memory/6012-13-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/6012-10-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/6012-12-0x0000000010000000-0x0000000010032000-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	6012	rundll32.exe
3	6012	rundll32.exe
4	6012	rundll32.exe
5	6012	rundll32.exe
6	6012	rundll32.exe
8	6012	rundll32.exe
9	6012	rundll32.exe
11	6012	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x001a00000002b68f-8.dat	acprotect

Deletes itself 1 IoCs

pid	Process
3508	ssahe.exe

Executes dropped EXE 1 IoCs

pid	Process
3508	ssahe.exe

Loads dropped DLL 1 IoCs

pid	Process
6012	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-1-5-21-2746394149-3500112804-1243524366-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\waqoe\\rwwdu.dll\",DoVirusScan"	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)	\??\i:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\b:	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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-05-22_efcc1526fe87106dd25248c066b2483b_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	ssahe.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
4856	cmd.exe
2316	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
2316	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
6012	rundll32.exe
6012	rundll32.exe
6012	rundll32.exe
6012	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	6012	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2360	2026-05-22_efcc1526fe87106dd25248c066b2483b_elex_wannacry.exe
3508	ssahe.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2360 wrote to memory of 4856	2360	2026-05-22_efcc1526fe87106dd25248c066b2483b_elex_wannacry.exe	79
PID 4856 wrote to memory of 2316	4856	cmd.exe	81
PID 4856 wrote to memory of 3508	4856	cmd.exe	82
PID 3508 wrote to memory of 6012	3508	ssahe.exe	83

C:\Users\Admin\AppData\Local\Temp\2026-05-22_efcc1526fe87106dd25248c066b2483b_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-22_efcc1526fe87106dd25248c066b2483b_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2360
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\ssahe.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-22_efcc1526fe87106dd25248c066b2483b_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4856
- - 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:2316
- - \??\c:\ssahe.exe
    c:\ssahe.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-22_efcc1526fe87106dd25248c066b2483b_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3508
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\waqoe\rwwdu.dll",DoVirusScan c:\ssahe.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:6012

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

ssahe.exe

Path C:\ssahe.exe
Size 93KB
SHA256 a443e89d1583019f3cc287bee47b73c3255379685bd3a940c790ca904c2d00cb
MD5 2bdf38b0f23411964ca19fb9798ffdf2
SHA1 0dc1024f6ce368a2157915a4bdaad140574efced
SHA512 e78b728a2264ebed4bd0735223132f80be897cf6e17f23dc2fc6df84c42fe05ed3143f240c630d4398a70db01779a522664be17bef5683ba2d64f91b066d4e31
SSDEEP 1536:TSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzl6:eSABNx6vb4RoI4pyjHYLhal01UoPX+hl
TLSH
T19F93AE07ABA589C9F1217C30566E373587BF985D3F1457979348EE4EA833D80EC3628A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

rwwdu.dll

Path \??\c:\waqoe\rwwdu.dll
Size 50KB
SHA256 b2d21c40c5bfc0f7695945946fa1cdd4eaf2f66a8391ddde6307c5f765fbf525
MD5 cbfc06794d16ace6adf42210183fc1b9
SHA1 74fc68a2af225b0aca954b3684940747511013c5
SHA512 181dbe8b63e28a81cb8e0b7240df8745da350e1ab433b157b8b4fd36aa10f0782e807c09563bcffe37cfe64aa1b514b2cc1f179fbcba422d96867179d88e13c9
SSDEEP 768:Z+arYIR3u5v4bGwCl56LNQQe5JBtGf1oTYtx/qQvorLOpqPJ/UP2Gy+OIudD05:ZPrG57TzDxJS6Etx/Zv2OwSy+OIOD05
TLSH
T15733F1ACE2F064F5D0AF6B345952225CF5C26F238D3190DB4A8214BF3C32A5B5B5E721
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2360-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/2360-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3508-7-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/6012-10-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/6012-11-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/6012-12-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/6012-13-0x0000000010001000-0x0000000010021000-memory.dmp

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