farfli | 4ee9684105d18a1e2c8acde9e9b8ba38daf1ed784afa29d994ef082581a9eefe

Analysis

max time kernel
148s
max time network
140s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
07/08/2026, 10:18

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General

Target
2026-08-07_33fd4bf118eb26cdba7e731158d5ab8d_elex_wannacry.exe
Size 107KB
Sample260807-mb479sfc49
SHA256 4ee9684105d18a1e2c8acde9e9b8ba38daf1ed784afa29d994ef082581a9eefe
MD5 33fd4bf118eb26cdba7e731158d5ab8d
SHA1 3bcfc6228ba60607c831c0366b8cf9dd432942ad
SHA512 e965bfdbd7c58ba0420a316b3752473f19c3d6f7613b517cf7f363506ca854dd43f6a82894585197b7682e5c83b138f13d52dfff2a3f2e0d8f20889b2c5bd7fa
SSDEEP 3072:NK4RNx6nb4RoIw/XBSeral6oaE0HGnvXuEOrc0po:Nl6XYeel6GGGVOO
TLSH
T124B3AE47ABA54DE5E1100CF402AB7B35937694892F15A797C388DE0DA43DE81EF362CE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli persistence spyware stealer upx

Malware Config

Signatures

Family: Farfli
Farfli is a Windows backdoor written in C++.
backdoor farfli

Detects Farfli Backdoor 5 IoCs

resource	yara_rule
behavioral2/memory/2508-10-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/2508-12-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/2508-13-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/2508-14-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/2508-17-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 5 IoCs

resource	yara_rule
behavioral2/memory/2508-10-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2508-12-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2508-13-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2508-14-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2508-17-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 8 IoCs

resource	yara_rule
behavioral2/memory/4872-6-0x0000000000400000-0x0000000000417000-memory.dmp	UPX
behavioral2/files/0x000e00000001c533-7.dat	UPX
behavioral2/memory/2508-9-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/2508-10-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/2508-12-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/2508-13-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/2508-14-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/2508-17-0x0000000010000000-0x0000000010024000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
1	2508	rundll32.exe
2	2508	rundll32.exe
3	2508	rundll32.exe
4	2508	rundll32.exe
5	2508	rundll32.exe
6	2508	rundll32.exe
7	2508	rundll32.exe
8	2508	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000e00000001c533-7.dat	acprotect

Deletes itself 1 IoCs

pid	Process
4872	tzaukoya.exe

Executes dropped EXE 1 IoCs

pid	Process
4872	tzaukoya.exe

Loads dropped DLL 1 IoCs

pid	Process
2508	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-1-5-21-3986082593-3624157295-3514260330-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\gfakx\\zumps.dll\",init"	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)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\w:	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

UPX packed file 7 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/files/0x000e00000001c533-7.dat	upx
behavioral2/memory/2508-9-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/2508-10-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/2508-12-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/2508-13-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/2508-14-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/2508-17-0x0000000010000000-0x0000000010024000-memory.dmp	upx

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
2032	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	2026-08-07_33fd4bf118eb26cdba7e731158d5ab8d_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	tzaukoya.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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
2236	PING.EXE
2032	cmd.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
2236	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2508	rundll32.exe
2508	rundll32.exe
2508	rundll32.exe
2508	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2508	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3704	2026-08-07_33fd4bf118eb26cdba7e731158d5ab8d_elex_wannacry.exe
4872	tzaukoya.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3704 wrote to memory of 2032	3704	2026-08-07_33fd4bf118eb26cdba7e731158d5ab8d_elex_wannacry.exe	89
PID 2032 wrote to memory of 2236	2032	cmd.exe	91
PID 2032 wrote to memory of 4872	2032	cmd.exe	92
PID 4872 wrote to memory of 2508	4872	tzaukoya.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-07_33fd4bf118eb26cdba7e731158d5ab8d_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-07_33fd4bf118eb26cdba7e731158d5ab8d_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3704
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\tzaukoya.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-07_33fd4bf118eb26cdba7e731158d5ab8d_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:2032
- - 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:2236
- - \??\c:\tzaukoya.exe
    c:\tzaukoya.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-07_33fd4bf118eb26cdba7e731158d5ab8d_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:\gfakx\zumps.dll",init c:\tzaukoya.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:2508

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

zumps.dll

Path \??\c:\gfakx\zumps.dll
Size 46KB
SHA256 b6bc7902da0250f6ca920b35b222f6a0fe62102caf05d2a1722c4d3b225a0a9e
MD5 42fe886bcb6460f7c2a46e21ecac5da6
SHA1 7d9a1c9fe17121cf61444da965f29e974a95ede2
SHA512 3d1a7dc1d9ca8a4376302ba20df584ad59b98e0d3b18b06b22d7f5a455833ce124e412fc1922a3b704dcbafa31987cda3115c9a71dd6299683502cebae33567c
SSDEEP 768:P60NIyOvlPSGxZ00FBsMT0fdB5h3vU7ExCClpoduUglNgLoR/C:P6e4lP5rvz1Vd8H/C
TLSH
T10023F15733A8577BC9E621FA3263BE142B357019CB3A83545CB9B6572C21C8D927930F
MD5 SHA1 SHA512 SSDEEP TLSH

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tzaukoya.exe

Path \??\c:\tzaukoya.exe
Size 107KB
SHA256 09acdfc5ab98fa2759f196fc6dbf17fabf40d7b638231e5f5fde8e515280ad00
MD5 2ca81d59f33b8ad43ee8d4be6e226d01
SHA1 dd629cf3f25a8b7ad2337e6d6ca922a5c973c5fc
SHA512 22fdcb0b52336d1a20ecf6f6d4c7e7aed792fed8f385d796cbdf5ffa32db89e5c0e79b06b938cc489a808dcaac147f1872f03324483cbd7f88db6de38edf6ca7
SSDEEP 3072:NK4RNx6nb4RoIw/XBSeral6oaE0HGnvXuEOrc0p0:Nl6XYeel6GGGVO+
TLSH
T1FBB3AE47ABA54DE5E1110CF402AB7B35937698892F15A797C388DE0DA43DE80DF362CE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2508-9-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/2508-10-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/2508-12-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/2508-13-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/2508-14-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/2508-17-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/3704-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3704-2-0x0000000000400000-0x0000000000417000-memory.dmp

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

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