farfli | 94c4ce9cdcdd5b89692d1a1b5f853bfc49bdf3c23c4c017a361a7d41868ec46b

Analysis

max time kernel
148s
max time network
149s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
15/07/2026, 09:32

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General

Target
2026-07-15_adf39988ab7dad2cb80151bc5f1b8d02_elex_wannacry.exe
Size 103KB
Sample260715-lhy46acs21
SHA256 94c4ce9cdcdd5b89692d1a1b5f853bfc49bdf3c23c4c017a361a7d41868ec46b
MD5 adf39988ab7dad2cb80151bc5f1b8d02
SHA1 2442da7a7e48a9d1c9b2a3640048162013618def
SHA512 15acbae8eb6e9522a755742d790264b87545b16101528030e35019def1a0a9044c491a1cfb5905af90853daacd274acef6ab99feb1afe061fb4fd38c2db209a7
SSDEEP 1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmy:uLRrO10TiJD9yjqrilyxOuP
TLSH
T1E3A37C1D6962C59EE4015F74430B922096A2AC19FA304F335384BB4EFF36E1BDDA91D8
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery 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/5588-11-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/5588-13-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/5588-11-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5588-13-0x0000000010000000-0x0000000010023000-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
2	5588	rundll32.exe
3	5588	rundll32.exe
4	5588	rundll32.exe
6	5588	rundll32.exe
7	5588	rundll32.exe
8	5588	rundll32.exe
10	5588	rundll32.exe
11	5588	rundll32.exe

Deletes itself 1 IoCs

pid	Process
2720	vzgyc.exe

Executes dropped EXE 1 IoCs

pid	Process
2720	vzgyc.exe

Loads dropped DLL 1 IoCs

pid	Process
5588	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-1-5-21-3989226554-2204910950-1522900112-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\uyhxa\\txounp.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)	\??\m:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\l:	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

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	2026-07-15_adf39988ab7dad2cb80151bc5f1b8d02_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	vzgyc.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
4352	cmd.exe
4556	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
4556	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5588	rundll32.exe
5588	rundll32.exe
5588	rundll32.exe
5588	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5588	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3436	2026-07-15_adf39988ab7dad2cb80151bc5f1b8d02_elex_wannacry.exe
2720	vzgyc.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3436 wrote to memory of 4352	3436	2026-07-15_adf39988ab7dad2cb80151bc5f1b8d02_elex_wannacry.exe	87
PID 4352 wrote to memory of 4556	4352	cmd.exe	89
PID 4352 wrote to memory of 2720	4352	cmd.exe	90
PID 2720 wrote to memory of 5588	2720	vzgyc.exe	91

C:\Users\Admin\AppData\Local\Temp\2026-07-15_adf39988ab7dad2cb80151bc5f1b8d02_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-15_adf39988ab7dad2cb80151bc5f1b8d02_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3436
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\vzgyc.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-15_adf39988ab7dad2cb80151bc5f1b8d02_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4352
- - 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:4556
- - C:\Users\Admin\AppData\Local\Temp\vzgyc.exe
    C:\Users\Admin\AppData\Local\Temp\\vzgyc.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-15_adf39988ab7dad2cb80151bc5f1b8d02_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2720
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\uyhxa\txounp.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\vzgyc.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:5588

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

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Downloads

vzgyc.exe

Path C:\Users\Admin\AppData\Local\Temp\vzgyc.exe
Size 103KB
SHA256 c0099cc3730700b2373f2a6533b1e48228795afd1ec1e26c6ed998a22f0fdba6
MD5 47275e45437d354bdf8be3e04c8f560b
SHA1 2662a2983110987e125af587eb5be2978e29496c
SHA512 1d05ef2d0f099dfd49c9943b9c57f50958380ae5759ec2f730e07433b781654b26cffefc605dff55e5fd67db233fdc850ab3685f238e44bf00fa8def089b4465
SSDEEP 1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmy8:uLRrO10TiJD9yjqrilyxOuP8
TLSH
T155A37C1C6962C59EE4015F74430B962097A2AC19FA344F335384BB4EFF36E1BDDA91E8
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

txounp.dll

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

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memory/2720-6-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3436-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3436-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/5588-9-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/5588-10-0x0000000000CE0000-0x0000000000CE2000-memory.dmp

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memory/5588-11-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/5588-13-0x0000000010000000-0x0000000010023000-memory.dmp

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