farfli | 0367fa07679b73ecdf4d426f011ac0f3f397a8f55baaba2a5bb028229cfe1b6a

Analysis

max time kernel
150s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20260513-en
resource tags

arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
08/06/2026, 21:53

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General

Target
2026-06-08_10d80042441b8cb64978b4d4d7504d43_elex_wannacry.exe
Size 105KB
Sample260608-1r52dsft3y
SHA256 0367fa07679b73ecdf4d426f011ac0f3f397a8f55baaba2a5bb028229cfe1b6a
MD5 10d80042441b8cb64978b4d4d7504d43
SHA1 eb925d0a3f7340dba2bf4b1ab536da7f034807be
SHA512 6d783ba3b39afe8b0db49674eab2da360a005bd79365e1fdde449e12f69decadb0de48d677b844bbf6b3ba5aec01748c368869a59c8546f25408a236a531c273
SSDEEP 3072:NK4RNx6nb4RoIw/XBSeral6oaE0HGnvXuEOrc0p2:Nl6XYeel6GGGVO4
TLSH
T163B3AF47ABA54DD5E1204CF402AB7B35937694892F15A787C388DE0DA43ED80DF362CE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery farfli persistence spyware stealer upx

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/4188-11-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/4188-13-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/4188-14-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/4188-15-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 4 IoCs

resource	yara_rule
behavioral2/memory/4188-11-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4188-13-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4188-14-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4188-15-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Custom signature

UPX dump on OEP (original entry point) 7 IoCs

resource	yara_rule
behavioral2/memory/1348-7-0x0000000000400000-0x0000000000417000-memory.dmp	UPX
behavioral2/files/0x001a00000002b5eb-8.dat	UPX
behavioral2/memory/4188-10-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/4188-11-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/4188-13-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/4188-14-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/4188-15-0x0000000010000000-0x0000000010024000-memory.dmp	UPX

Badlisted process makes network request 9 IoCs

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

flow	pid	Process
1	4188	rundll32.exe
2	4188	rundll32.exe
3	4188	rundll32.exe
4	4188	rundll32.exe
5	4188	rundll32.exe
6	4188	rundll32.exe
7	4188	rundll32.exe
8	4188	rundll32.exe
11	4188	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x001a00000002b5eb-8.dat	acprotect

Deletes itself 1 IoCs

pid	Process
1348	gvdlt.exe

Executes dropped EXE 1 IoCs

pid	Process
1348	gvdlt.exe

Loads dropped DLL 1 IoCs

pid	Process
4188	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-1-5-21-1768642833-2142038154-4041560723-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\ugbzv\\zmdsf.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)	\??\j:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\b:	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)	\??\q:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\g:	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)	\??\u:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\i:	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 6 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x001a00000002b5eb-8.dat	upx
behavioral2/memory/4188-10-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/4188-11-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/4188-13-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/4188-14-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/4188-15-0x0000000010000000-0x0000000010024000-memory.dmp	upx

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	2026-06-08_10d80042441b8cb64978b4d4d7504d43_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	gvdlt.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
6056	cmd.exe
2476	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
2476	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4188	rundll32.exe
4188	rundll32.exe
4188	rundll32.exe
4188	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4188	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4232	2026-06-08_10d80042441b8cb64978b4d4d7504d43_elex_wannacry.exe
1348	gvdlt.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4232 wrote to memory of 6056	4232	2026-06-08_10d80042441b8cb64978b4d4d7504d43_elex_wannacry.exe	80
PID 6056 wrote to memory of 2476	6056	cmd.exe	82
PID 6056 wrote to memory of 1348	6056	cmd.exe	83
PID 1348 wrote to memory of 4188	1348	gvdlt.exe	84

C:\Users\Admin\AppData\Local\Temp\2026-06-08_10d80042441b8cb64978b4d4d7504d43_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-06-08_10d80042441b8cb64978b4d4d7504d43_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4232
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\gvdlt.exe "C:\Users\Admin\AppData\Local\Temp\2026-06-08_10d80042441b8cb64978b4d4d7504d43_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:6056
- - 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:2476
- - \??\c:\gvdlt.exe
    c:\gvdlt.exe "C:\Users\Admin\AppData\Local\Temp\2026-06-08_10d80042441b8cb64978b4d4d7504d43_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1348
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\ugbzv\zmdsf.dll",init c:\gvdlt.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:4188

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

Replay Monitor

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Downloads

gvdlt.exe

Path C:\gvdlt.exe
Size 105KB
SHA256 92fb3588657990a24cf718669b99d1e5b8242d39f5a051e3186a75e6d2f1c110
MD5 b1034f47ec502062379bd1f73461269f
SHA1 876e78da87bbec6a1776b60f8ca68d3b7d26b3f3
SHA512 cdf0d75ed7033e7d567018ce1ddb59b890bfab535c8cfd202b8b2ccf7901d743cef2c6b672133a5f4632d1183f041d490bbc930c0f604791a990a509a95447cf
SSDEEP 3072:NK4RNx6nb4RoIw/XBSeral6oaE0HGnvXuEOrc0p8:Nl6XYeel6GGGVOW
TLSH
T19EB3AF47ABA54DD5E1204CF402AB7B35937694892F15A787C388DE0EA43ED80DF362CE
MD5 SHA1 SHA512 SSDEEP TLSH

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zmdsf.dll

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

Submit Download

memory/1348-7-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4188-10-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/4188-11-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/4188-13-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/4188-14-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/4188-15-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/4232-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4232-2-0x0000000000400000-0x0000000000417000-memory.dmp

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