farfli | f4c8bbc529f3f3d9f10ff29b897b28ea45101820c3816098d1874dfc3a8d79ee

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
25/04/2026, 09:19

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General

Target
2026-04-25_ec6f0ced2cea2ecee9c7a71f39f70ebd_elex_wannacry.exe
Size 95KB
Sample260425-k97pyadv31
SHA256 f4c8bbc529f3f3d9f10ff29b897b28ea45101820c3816098d1874dfc3a8d79ee
MD5 ec6f0ced2cea2ecee9c7a71f39f70ebd
SHA1 499445b9c56b736ee3cf60f1769c32e4ff44d616
SHA512 06dfb476a87d01b9b2c13c8b8310d7530654583bd7da5280f56e02c8b75a2232b966111307338401a771d3ec67ad6c0e215479ce9c5b5166c788a13382060d88
SSDEEP 1536:TSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzlV:eSABNx6vb4RoI4pyjHYLhal01UoPX+hM
TLSH
T1A5A3AE135BB588CAE5216C74562E773083FEA81E3F1457635388EE4EE437D85EC3628A
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 4 IoCs

resource	yara_rule
behavioral1/memory/1820-11-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli
behavioral1/memory/1820-10-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral1/memory/1820-12-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral1/memory/1820-14-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral1/memory/1820-10-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1820-12-0x0000000010000000-0x0000000010032000-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
6	1820	rundll32.exe
7	1820	rundll32.exe
8	1820	rundll32.exe
9	1820	rundll32.exe
27	1820	rundll32.exe
51	1820	rundll32.exe
79	1820	rundll32.exe
96	1820	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x000800000002437e-9.dat	acprotect

Deletes itself 1 IoCs

pid	Process
916	iomfdds.exe

Executes dropped EXE 1 IoCs

pid	Process
916	iomfdds.exe

Loads dropped DLL 1 IoCs

pid	Process
1820	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-1-5-21-2714754311-527593155-1440850301-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\xpwdd\\ukdbv.dll\",DoVirusScan"	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)	\??\r:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	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

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	2026-04-25_ec6f0ced2cea2ecee9c7a71f39f70ebd_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	iomfdds.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
4124	cmd.exe
3764	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
3764	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1820	rundll32.exe
1820	rundll32.exe
1820	rundll32.exe
1820	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1820	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2176	2026-04-25_ec6f0ced2cea2ecee9c7a71f39f70ebd_elex_wannacry.exe
916	iomfdds.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2176 wrote to memory of 4124	2176	2026-04-25_ec6f0ced2cea2ecee9c7a71f39f70ebd_elex_wannacry.exe	83
PID 4124 wrote to memory of 3764	4124	cmd.exe	85
PID 4124 wrote to memory of 916	4124	cmd.exe	86
PID 916 wrote to memory of 1820	916	iomfdds.exe	87

C:\Users\Admin\AppData\Local\Temp\2026-04-25_ec6f0ced2cea2ecee9c7a71f39f70ebd_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-25_ec6f0ced2cea2ecee9c7a71f39f70ebd_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2176
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\iomfdds.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-25_ec6f0ced2cea2ecee9c7a71f39f70ebd_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4124
- - 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:3764
- - \??\c:\iomfdds.exe
    c:\iomfdds.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-25_ec6f0ced2cea2ecee9c7a71f39f70ebd_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:916
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\xpwdd\ukdbv.dll",DoVirusScan c:\iomfdds.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:1820

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

iomfdds.exe

Path C:\iomfdds.exe
Size 95KB
SHA256 897be1971d99d5cc9af3145ea542f1917953bcb975252b634aa30d8f4f0be549
MD5 59972dcdb265befa7209d3ff51f17517
SHA1 535923b0af6f0056e21b6cc68eaee613c05612b7
SHA512 0212e9bd6ecb3a98466494584637691a0bff3d53ebdd05d7fe37e61a07b441f672f6be3f8ae3ced636b6a8359794145562cc7967ce334fa345620df9978d7c22
SSDEEP 1536:TSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzlH:eSABNx6vb4RoI4pyjHYLhal01UoPX+hI
TLSH
T13FA3AE035BB588C9E5216C74562E773083FEA85E3F1457635388EE4EE437D85EC3628A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ukdbv.dll

Path C:\xpwdd\ukdbv.dll
Size 50KB
SHA256 b2d21c40c5bfc0f7695945946fa1cdd4eaf2f66a8391ddde6307c5f765fbf525
MD5 cbfc06794d16ace6adf42210183fc1b9
SHA1 74fc68a2af225b0aca954b3684940747511013c5
SHA512 181dbe8b63e28a81cb8e0b7240df8745da350e1ab433b157b8b4fd36aa10f0782e807c09563bcffe37cfe64aa1b514b2cc1f179fbcba422d96867179d88e13c9
SSDEEP 768:Z+arYIR3u5v4bGwCl56LNQQe5JBtGf1oTYtx/qQvorLOpqPJ/UP2Gy+OIudD05:ZPrG57TzDxJS6Etx/Zv2OwSy+OIOD05
TLSH
T15733F1ACE2F064F5D0AF6B345952225CF5C26F238D3190DB4A8214BF3C32A5B5B5E721
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/916-7-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/1820-11-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/1820-10-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/1820-12-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/1820-13-0x0000000000B20000-0x0000000000B5B000-memory.dmp

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memory/1820-14-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/2176-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/2176-2-0x0000000000400000-0x0000000000417000-memory.dmp

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