farfli | 4f182087d109cbe0cb7930d8dfec8b60ada47d45eb3b92f88d2434264bfeda90

Analysis

max time kernel
148s
max time network
137s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
16/09/2026, 23:07

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General

Target
2026-09-16_2762e70039e76d9b8eb75a43e45accc0_elex_wannacry.exe
Size 389KB
Sample260916-24dckswfpe
SHA256 4f182087d109cbe0cb7930d8dfec8b60ada47d45eb3b92f88d2434264bfeda90
MD5 2762e70039e76d9b8eb75a43e45accc0
SHA1 0c70469a19fb03f3f9150ccec0546b1ff2c131c0
SHA512 78d0d3ca4988eac56c651ae644656918e3d8a12a4003eef612390fbed4e9a08be6946daef120470ea328f00d6e1a05f29a954a8d74c0ee21829a72f789e06565
SSDEEP 6144:54yA9i7ZanCjRDWqCEdK40LUT4AxFa7abls3ol:i7i1TjRDdZdVT4AxFauba3G
TLSH
T16E848AC057F9C205F2BE2F75DAB9B6F44A29BD55EE34E58B12843C1DB870A91D830326
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 2 IoCs

resource	yara_rule
behavioral2/memory/4996-10-0x0000000010000000-0x0000000010054000-memory.dmp	family_farfli
behavioral2/memory/4996-13-0x0000000010000000-0x0000000010054000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/4996-10-0x0000000010000000-0x0000000010054000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4996-13-0x0000000010000000-0x0000000010054000-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
1	4996	rundll32.exe
4	4996	rundll32.exe
5	4996	rundll32.exe
6	4996	rundll32.exe
7	4996	rundll32.exe
8	4996	rundll32.exe
10	4996	rundll32.exe
11	4996	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4412	prrsx.exe

Executes dropped EXE 1 IoCs

pid	Process
4412	prrsx.exe

Loads dropped DLL 1 IoCs

pid	Process
4996	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-1-5-21-1262770251-41185387-1005173349-1000\Software\Microsoft\Windows\CurrentVersion\Run\HDTunePro = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\pqdcy\\cnozjkpk.dll\",GetCpu"	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)	\??\v:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\s:	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

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\pqdcy	prrsx.exe
File created	\??\c:\Program Files\pqdcy\cnozjkpk.dll	prrsx.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
5652	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	prrsx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-09-16_2762e70039e76d9b8eb75a43e45accc0_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

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
5652	cmd.exe
5160	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
5160	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4996	rundll32.exe
4996	rundll32.exe
4996	rundll32.exe
4996	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4996	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2084	2026-09-16_2762e70039e76d9b8eb75a43e45accc0_elex_wannacry.exe
4412	prrsx.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2084 wrote to memory of 5652	2084	2026-09-16_2762e70039e76d9b8eb75a43e45accc0_elex_wannacry.exe	87
PID 5652 wrote to memory of 5160	5652	cmd.exe	89
PID 5652 wrote to memory of 4412	5652	cmd.exe	90
PID 4412 wrote to memory of 4996	4412	prrsx.exe	91

C:\Users\Admin\AppData\Local\Temp\2026-09-16_2762e70039e76d9b8eb75a43e45accc0_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-16_2762e70039e76d9b8eb75a43e45accc0_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2084
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\prrsx.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-16_2762e70039e76d9b8eb75a43e45accc0_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:5652
- - 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:5160
- - C:\Users\Admin\AppData\Local\Temp\prrsx.exe
    C:\Users\Admin\AppData\Local\Temp\\prrsx.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-16_2762e70039e76d9b8eb75a43e45accc0_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4412
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\pqdcy\cnozjkpk.dll",GetCpu C:\Users\Admin\AppData\Local\Temp\prrsx.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:4996

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

prrsx.exe

Path C:\Users\Admin\AppData\Local\Temp\prrsx.exe
Size 389KB
SHA256 b7da9c79d3a9d63d9873e71710f45580d831ddfe5b7c87831f954058844bc546
MD5 ec44e2e8fa9858dd13ff85030c1bd628
SHA1 c2cb7b06ddae352ef88e2266ee5b0c609530beee
SHA512 cb7a6d63dac7c4ede1c08eea5b5c7f6adc442dde58f327c77af586e6a4254233c6080295b16f548a8fcfa6f149d751d056041bf8f5902a5c61a0c3853885dc26
SSDEEP 6144:54yA9i7ZanCjRDWqCEdK40LUT4AxFa7abls3o1:i7i1TjRDdZdVT4AxFauba3W
TLSH
T1C6848AC057F9C205F2BE2F75DAB9B6F44A29BD55EE34E64B12843C1DB870A91D830326
MD5 SHA1 SHA512 SSDEEP TLSH

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cnozjkpk.dll

Path \??\c:\Program Files\pqdcy\cnozjkpk.dll
Size 144KB
SHA256 c87cdd76364246f2adb8d820ea13a22a98c89d0b77894af3e97f9bec1f33bcdb
MD5 a91a7f6c25cd8e57c3b29930e850ceb5
SHA1 024aba6e4ae661316df5447c16dc8db8d46145d6
SHA512 9a310a52ea79ce203d701126192fc9d1437c87df3eefe84dd1842c9fd9957dfc63912439dfdc97bf9566c91f6773bac002a6ab3c304e29d2007df439a58299b6
SSDEEP 3072:9FSwhKDdKtTZVdOEaoxVDYn10zGJP4eLhSco/fWoB7re9Z9Idl8v4qClISA:awhKDaZfFTxV8nXgesN/OpLcl8v4qwIp
TLSH
T1A8E302E2215AD2B3F4BE177D9C57050EF9BD14009BB98A5B57C0781A2C1AA36E83D373
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2084-0-0x0000000000400000-0x0000000000461000-memory.dmp

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memory/2084-2-0x0000000000400000-0x0000000000461000-memory.dmp

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memory/4412-6-0x0000000000400000-0x0000000000461000-memory.dmp

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memory/4996-9-0x0000000010000000-0x0000000010054000-memory.dmp

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memory/4996-12-0x000000001004E000-0x000000001004F000-memory.dmp

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memory/4996-10-0x0000000010000000-0x0000000010054000-memory.dmp

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memory/4996-13-0x0000000010000000-0x0000000010054000-memory.dmp

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