farfli | df357e5ef643237029224e88b649e427204e2662e5eff5dc58ac5cf639a54eb4

Analysis

max time kernel
148s
max time network
147s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260710-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
09/08/2026, 10:02

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General

Target
2026-08-09_838ff5fd3b7093a742c4bb35bd27e4bf_elex_wannacry.exe
Size 95KB
Sample260809-l27kmsvgpd
SHA256 df357e5ef643237029224e88b649e427204e2662e5eff5dc58ac5cf639a54eb4
MD5 838ff5fd3b7093a742c4bb35bd27e4bf
SHA1 cc50fdd88bc618b047c2a203297d6294cd634ff0
SHA512 2ddbac851bc390537835d97157cc6b7dd8bf4fe104b72280d7c57bf71337436014b3bc0e652850ba1e03922426d21e634f5684fe7f6e1de24c6392753639f917
SSDEEP 1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmyi:uLRrO10TiJD9yjqrilyxOuPi
TLSH
T171A38C1C6962C59EE4054F74434B9620A7A2AC59FA304F335380BA4EFF36D1BEDE91D8
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 3 IoCs

resource	yara_rule
behavioral2/memory/1132-11-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/1132-14-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/1132-15-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/1132-11-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1132-14-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1132-15-0x0000000010000000-0x0000000010023000-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	1132	rundll32.exe
5	1132	rundll32.exe
6	1132	rundll32.exe
11	1132	rundll32.exe
12	1132	rundll32.exe
14	1132	rundll32.exe
15	1132	rundll32.exe
16	1132	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4808	qtetzdcy.exe

Executes dropped EXE 1 IoCs

pid	Process
4808	qtetzdcy.exe

Loads dropped DLL 1 IoCs

pid	Process
1132	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-1-5-21-2246396966-3025826688-3847171515-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\tcvuo\\gstgnakn.dll\",QueryPluginInterface"	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)	\??\q:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\m:	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

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
1212	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	2026-08-09_838ff5fd3b7093a742c4bb35bd27e4bf_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	qtetzdcy.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
1212	cmd.exe
4088	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
4088	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1132	rundll32.exe
1132	rundll32.exe
1132	rundll32.exe
1132	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1132	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5956	2026-08-09_838ff5fd3b7093a742c4bb35bd27e4bf_elex_wannacry.exe
4808	qtetzdcy.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5956 wrote to memory of 1212	5956	2026-08-09_838ff5fd3b7093a742c4bb35bd27e4bf_elex_wannacry.exe	88
PID 1212 wrote to memory of 4088	1212	cmd.exe	90
PID 1212 wrote to memory of 4808	1212	cmd.exe	91
PID 4808 wrote to memory of 1132	4808	qtetzdcy.exe	92

C:\Users\Admin\AppData\Local\Temp\2026-08-09_838ff5fd3b7093a742c4bb35bd27e4bf_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-09_838ff5fd3b7093a742c4bb35bd27e4bf_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5956
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\qtetzdcy.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-09_838ff5fd3b7093a742c4bb35bd27e4bf_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:1212
- - 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:4088
- - C:\Users\Admin\AppData\Local\Temp\qtetzdcy.exe
    C:\Users\Admin\AppData\Local\Temp\\qtetzdcy.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-09_838ff5fd3b7093a742c4bb35bd27e4bf_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4808
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\tcvuo\gstgnakn.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\qtetzdcy.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:1132

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

qtetzdcy.exe

Path C:\Users\Admin\AppData\Local\Temp\qtetzdcy.exe
Size 95KB
SHA256 2206bbabb654aed0931f835d892d26dfb7968cfa4c943f7d793390288447fe24
MD5 53ce7828a49f77cc71da154fdd06088c
SHA1 b0c938171400f39b67c7b6d2cc5876e848e84293
SHA512 46dbb12d989ec1dab115fe327335f1c9e8dd63d4a6ef3c84e035c064c0389eb8d5923e47b045cd6b868bb2e31891ca362385d9e51bc261b63a58d6b4c1068e73
SSDEEP 1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmyb:uLRrO10TiJD9yjqrilyxOuPb
TLSH
T143A38C1C6962C59EE4054F74434B962097A2AC19FA304F335384BA4EFF36E1BEDE91D8
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

gstgnakn.dll

Path \??\c:\tcvuo\gstgnakn.dll
Size 44KB
SHA256 9111c1eb1f0b59dcd49cfd5a0abc0ba100ac59a3bcae8623ff091dfdc46fed3c
MD5 0f12a7d509b2c9bb9b4cd6d8a0325e86
SHA1 f5fb59ad4f0633d115b06f35a2dc161dc4367157
SHA512 e3c84a643ff0a2627daba8a056221985a472aaf07bade61b3e9459db4bfc8792c1347606911e3fcc01581508004b18b5435bcccd5e7617cc6d091f37a5f42e7f
SSDEEP 768:DICzePjle2367kjhrXLdCuYMW8QVnwrLDGe/brbtJyOTuXfADVjeJ2i/MVJWAE:DDePjA23Ukjh37YMonwrvGybrbbRCf4E
TLSH
T1FD23F1A7B94E8D4FC0AE41F7078FC8D422B5589A97A7CB4626008F216CC4FB07E52376
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1132-9-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/1132-10-0x0000000002CA0000-0x0000000002CA2000-memory.dmp

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memory/1132-12-0x0000000002CA0000-0x0000000002CA2000-memory.dmp

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memory/1132-11-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/1132-14-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/1132-15-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/4808-6-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/5956-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/5956-2-0x0000000000400000-0x0000000000417000-memory.dmp

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