farfli | b448a0298068e15e26ce7c0a447b22f29791526826a0ecf97e67a5f902a11a81

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
14/07/2026, 06:37

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General

Target
2026-07-14_864bf66ee5350d63a2ca3941d37a34e0_elex_wannacry.exe
Size 86KB
Sample260714-hdqqfaas2x
SHA256 b448a0298068e15e26ce7c0a447b22f29791526826a0ecf97e67a5f902a11a81
MD5 864bf66ee5350d63a2ca3941d37a34e0
SHA1 6a59ec035b9cc25e3a7d14efd8f32799b067a5f4
SHA512 52eff068389345d20c8729c63da51d465e70ed2ba6fa869a6b925980e39878ff0a0c2d259b5a84e1ce49a6e78eda50d9f692e14236f24de4ec546584b90de35c
SSDEEP 1536:m/14ZaKO/myxZmAijMcCwVVydoM1bKAQAH9M53e+iWtnSdQ:a14ZaKOTZSMcJVgDKxAH9MhtfSdQ
TLSH
T1C383CF232FBB4175DD44AF711E6B2669E6F2BD36212082768B5C9D8DAA3CE44DB0131C
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
behavioral1/memory/3016-13-0x0000000010000000-0x0000000010021000-memory.dmp	family_farfli
behavioral1/memory/3016-16-0x0000000010000000-0x0000000010021000-memory.dmp	family_farfli
behavioral1/memory/3016-17-0x0000000010000000-0x0000000010021000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral1/memory/3016-13-0x0000000010000000-0x0000000010021000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/3016-16-0x0000000010000000-0x0000000010021000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/3016-17-0x0000000010000000-0x0000000010021000-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
7	3016	rundll32.exe
8	3016	rundll32.exe
9	3016	rundll32.exe
35	3016	rundll32.exe
48	3016	rundll32.exe
63	3016	rundll32.exe
81	3016	rundll32.exe
88	3016	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4872	pbyjy.exe

Executes dropped EXE 1 IoCs

pid	Process
4872	pbyjy.exe

Loads dropped DLL 1 IoCs

pid	Process
3016	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-1-5-21-1074038928-2032447174-945360078-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\fbwsw\\sfgsyyzrm.dll\",GetWindowClass"	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)	\??\s:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\o:	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)	\??\v:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\n:	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	2026-07-14_864bf66ee5350d63a2ca3941d37a34e0_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	pbyjy.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
2844	cmd.exe
2672	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 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
2672	PING.EXE

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3016	rundll32.exe
3016	rundll32.exe
3016	rundll32.exe
3016	rundll32.exe
3016	rundll32.exe
3016	rundll32.exe
3016	rundll32.exe
3016	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3016	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1864	2026-07-14_864bf66ee5350d63a2ca3941d37a34e0_elex_wannacry.exe
4872	pbyjy.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1864 wrote to memory of 2844	1864	2026-07-14_864bf66ee5350d63a2ca3941d37a34e0_elex_wannacry.exe	85
PID 2844 wrote to memory of 2672	2844	cmd.exe	87
PID 2844 wrote to memory of 4872	2844	cmd.exe	88
PID 4872 wrote to memory of 3016	4872	pbyjy.exe	89

C:\Users\Admin\AppData\Local\Temp\2026-07-14_864bf66ee5350d63a2ca3941d37a34e0_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-14_864bf66ee5350d63a2ca3941d37a34e0_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1864
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\pbyjy.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-14_864bf66ee5350d63a2ca3941d37a34e0_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2844
- - 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:2672
- - \??\c:\pbyjy.exe
    c:\pbyjy.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-14_864bf66ee5350d63a2ca3941d37a34e0_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4872
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\fbwsw\sfgsyyzrm.dll",GetWindowClass c:\pbyjy.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:3016

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

sfgsyyzrm.dll

Path \??\c:\fbwsw\sfgsyyzrm.dll
Size 43KB
SHA256 0b747c32730f2ad29b44299054bc22f8075702b081e91edaaead528abca227d2
MD5 0164aeb78f4d2181e817a9a6b0ad22f1
SHA1 c56c6a743e48e8652707a34e4cddc1f645f140ea
SHA512 e69ad90790d8062a903954f7ea85cacd241113afaf0eb16098f473835cffcda6e1f9fa9844a8618cc297fffa2e6ff7d458f9ebb2ce3febf7ffd683ffd6ad44f5
SSDEEP 768:2DdBa8mqIOiSUZrBGhvQLq6UYiaKRsRMwwY2BjkTrXW/VJZ581swUqHhiQREQoJs:kwqnPUb+v0q6UY+sRMwwY2Jkal+1ZUqJ
TLSH
T19613F133EACCDFDFF8A05271C576D0FCD337AC2849669A0395A0219D9D60948B878F66
MD5 SHA1 SHA512 SSDEEP TLSH

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pbyjy.exe

Path \??\c:\pbyjy.exe
Size 86KB
SHA256 23e062a5aa16092c1f0eb7eb565811668c32d5b55ac1541f3a01acb18c6f6df5
MD5 a3d5d3c7c78954ee179f20ce1231dde5
SHA1 34c4cdfd7ba255650dfd51697a2c453455296d5e
SHA512 5477285fec0f2da84e3d8bd4af05927119aab8e5b8d0421875b20435853652e8425020ff38e2113cdac98ff8656484a6fa2dc6ee9081ee1076ed6084108cc858
SSDEEP 1536:m/14ZaKO/myxZmAijMcCwVVydoM1bKAQAH9M53e+iWtnSdH:a14ZaKOTZSMcJVgDKxAH9MhtfSdH
TLSH
T16083CF232FBB4175DD44AF711E6B2669E6F2BD36212082768B5CAD8DA93CF44DB0131C
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1864-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/1864-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3016-11-0x0000000010000000-0x0000000010021000-memory.dmp

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memory/3016-12-0x0000000001070000-0x0000000001072000-memory.dmp

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memory/3016-13-0x0000000010000000-0x0000000010021000-memory.dmp

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memory/3016-14-0x0000000001070000-0x0000000001072000-memory.dmp

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memory/3016-16-0x0000000010000000-0x0000000010021000-memory.dmp

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memory/3016-17-0x0000000010000000-0x0000000010021000-memory.dmp

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memory/4872-6-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4872-8-0x0000000000400000-0x0000000000417000-memory.dmp

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