farfli | 264c1605397121de8f02d0b2c888e4cfc99ee9edb8a8be976db69a9a0dfd9e48

Analysis

max time kernel
148s
max time network
137s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
18/07/2026, 11:00

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General

Target
2026-07-18_7cf6f31b5fa293ac9b7785822d646456_elex_wannacry.exe
Size 92KB
Sample260718-m4dwsag19k
SHA256 264c1605397121de8f02d0b2c888e4cfc99ee9edb8a8be976db69a9a0dfd9e48
MD5 7cf6f31b5fa293ac9b7785822d646456
SHA1 bd9eabce0767410418d46504ad90523ba2aa137e
SHA512 e1f56d944c4131a7bc760b978e9bb56ac4c009290a00232c01527bac97450e5ef12a97bcd0eb7d2309c18d5f53b30ec6fc0da9e4aad6133fc94a6ad69140833a
SSDEEP 1536:cRiAXaKD5g4ZlYjqe2M4VlCmfvrr7EC6QucEqrtmA6AeSWt3SdR:KiAXaKDXZa/4VlCm7fE7QlEKtSNidR
TLSH
T11193AE066BF4CD62E0A589B5177707A54E77BC7A2D24C30B9BA1B91E9C30F40EF24369
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution 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/3172-9-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/3172-10-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli
behavioral2/memory/3172-11-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/3172-12-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/3172-9-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3172-11-0x0000000010000000-0x000000001002E000-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
4	3172	rundll32.exe
8	3172	rundll32.exe
9	3172	rundll32.exe
10	3172	rundll32.exe
12	3172	rundll32.exe
13	3172	rundll32.exe
14	3172	rundll32.exe
15	3172	rundll32.exe

Deletes itself 1 IoCs

pid	Process
2408	kmfkjgbi.exe

Executes dropped EXE 1 IoCs

pid	Process
2408	kmfkjgbi.exe

Loads dropped DLL 1 IoCs

pid	Process
3172	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-1-5-21-189034102-168398478-1159367937-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\swids\\fzrxbfgx.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)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\o:	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

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
4244	cmd.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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	kmfkjgbi.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-07-18_7cf6f31b5fa293ac9b7785822d646456_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
4244	cmd.exe
6128	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
6128	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3172	rundll32.exe
3172	rundll32.exe
3172	rundll32.exe
3172	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3172	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
824	2026-07-18_7cf6f31b5fa293ac9b7785822d646456_elex_wannacry.exe
2408	kmfkjgbi.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 824 wrote to memory of 4244	824	2026-07-18_7cf6f31b5fa293ac9b7785822d646456_elex_wannacry.exe	89
PID 4244 wrote to memory of 6128	4244	cmd.exe	91
PID 4244 wrote to memory of 2408	4244	cmd.exe	92
PID 2408 wrote to memory of 3172	2408	kmfkjgbi.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-07-18_7cf6f31b5fa293ac9b7785822d646456_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-18_7cf6f31b5fa293ac9b7785822d646456_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:824
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\kmfkjgbi.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-18_7cf6f31b5fa293ac9b7785822d646456_elex_wannacry.exe"
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4244
- - 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:6128
- - \??\c:\kmfkjgbi.exe
    c:\kmfkjgbi.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-18_7cf6f31b5fa293ac9b7785822d646456_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2408
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\swids\fzrxbfgx.dll",GetWindowClass c:\kmfkjgbi.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:3172

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

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

kmfkjgbi.exe

Path \??\c:\kmfkjgbi.exe
Size 92KB
SHA256 d3cf33e815ff68760c3538e5db7762179a509584dc29582a9a7125c21ad3523c
MD5 86e6fa99a4c29edf2a62ce44eaaaf778
SHA1 321ba2ec18ff2e76aec5f3bb6a2ec2caacb19afa
SHA512 610acd1d570f802a5235584ed88f72cd691c2f971a9473f89f9c744576f19c5b64bc60a119c12a79f14ead4c593965ad5f854b6d11f91f266ed9134d839c7dea
SSDEEP 1536:cRiAXaKD5g4ZlYjqe2M4VlCmfvrr7EC6QucEqrtmA6AeSWt3SdRX:KiAXaKDXZa/4VlCm7fE7QlEKtSNidRX
TLSH
T1FA93AE066BF4CD62E0A549B5177707A54E77BC7A2D24C30B9BA1B91E9C30F40EF24369
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

fzrxbfgx.dll

Path \??\c:\swids\fzrxbfgx.dll
Size 46KB
SHA256 615e79da4fd5512e796a7aa7335791445c4419564a62065b96ec6af4f45c5da0
MD5 e1b69009b84a57990f394d671390ed02
SHA1 586cb5213c9cbdfe5ce94a284c324d917cc52903
SHA512 c78b9484fa33cf5379257ab965d56b229d696fe262367a180bf7b50691b0c51e5a07dc7b96be07cf977ea0aab9ce29c503c4f36c4009ec480e2fb0498ffc13bc
SSDEEP 768:KsUfnvxs6iLlhpfFPtnQf7kifD/v7yb9BEtoyviA1129Vvi3UTP:KsJT1qf4W/vub9yNiA118d+kP
TLSH
T17823F2A947B44EB3E2BD0779889187DC69BD6D26173384054A6301DF7C70443EA6C6EE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/824-0-0x0000000000400000-0x000000000041B000-memory.dmp

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memory/824-2-0x0000000000400000-0x000000000041B000-memory.dmp

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memory/2408-6-0x0000000000400000-0x000000000041B000-memory.dmp

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memory/3172-9-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/3172-10-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/3172-11-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/3172-12-0x0000000010001000-0x000000001001E000-memory.dmp

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