farfli | 5dfad612adb73207f006cefa1233becdce56420b212ad56164da8aa0bb4daf50

Analysis

max time kernel
150s
max time network
145s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
04/05/2026, 01:37

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General

Target
2026-05-04_29b16343ee8b022c49278dd61b1a0b6f_elex_wannacry.exe
Size 103KB
Sample260504-b1tx2sa15s
SHA256 5dfad612adb73207f006cefa1233becdce56420b212ad56164da8aa0bb4daf50
MD5 29b16343ee8b022c49278dd61b1a0b6f
SHA1 8458dac369c846612c1ee04b31778ab469969c6a
SHA512 eecd378a9a572074cfe5ed408467b6f48b84835168bc5b0f396244ab245054a293e1a0eea46bc827635dd3c675d7ad9ebf8dc51cb10429e64a0a90ad8877a305
SSDEEP 1536:agDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIcIWlmy:ELRrO10TiJD9yjqrilyxOWP
TLSH
T170A3BE1C7D52C99EE0058B7047579625A6B2AC19FA304F338340FA5EBF32D17EED9198
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/2524-15-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/2524-21-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/2524-15-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2524-21-0x0000000010000000-0x0000000010023000-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	2524	rundll32.exe
3	2524	rundll32.exe
4	2524	rundll32.exe
5	2524	rundll32.exe
6	2524	rundll32.exe
7	2524	rundll32.exe
9	2524	rundll32.exe
10	2524	rundll32.exe

Deletes itself 1 IoCs

pid	Process
5792	usgqyyl.exe

Executes dropped EXE 1 IoCs

pid	Process
5792	usgqyyl.exe

Loads dropped DLL 1 IoCs

pid	Process
2524	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-1-5-21-2397528088-2630719772-1129911217-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\pedoh\\cvogi.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)	\??\b:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	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	2026-05-04_29b16343ee8b022c49278dd61b1a0b6f_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	usgqyyl.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
4552	cmd.exe
4564	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
4564	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2524	rundll32.exe
2524	rundll32.exe
2524	rundll32.exe
2524	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2524	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1368	2026-05-04_29b16343ee8b022c49278dd61b1a0b6f_elex_wannacry.exe
5792	usgqyyl.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1368 wrote to memory of 4552	1368	2026-05-04_29b16343ee8b022c49278dd61b1a0b6f_elex_wannacry.exe	79
PID 4552 wrote to memory of 4564	4552	cmd.exe	81
PID 4552 wrote to memory of 5792	4552	cmd.exe	82
PID 5792 wrote to memory of 2524	5792	usgqyyl.exe	83

C:\Users\Admin\AppData\Local\Temp\2026-05-04_29b16343ee8b022c49278dd61b1a0b6f_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-04_29b16343ee8b022c49278dd61b1a0b6f_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1368
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\usgqyyl.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-04_29b16343ee8b022c49278dd61b1a0b6f_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4552
- - 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:4564
- - C:\Users\Admin\AppData\Local\Temp\usgqyyl.exe
    C:\Users\Admin\AppData\Local\Temp\\usgqyyl.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-04_29b16343ee8b022c49278dd61b1a0b6f_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:5792
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\pedoh\cvogi.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\usgqyyl.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:2524

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

usgqyyl.exe

Path C:\Users\Admin\AppData\Local\Temp\usgqyyl.exe
Size 103KB
SHA256 a4caf1852b1cc3ddc6c9fd19e65d800db74f76c430bb6b28b7fd9b4bcc77366b
MD5 2e2f2787c9d5c525931f6ba15daf57ad
SHA1 45de04999e9da50a40b20bec2b7b2f7d0a7981e5
SHA512 5c9da64fab96d8164aeee20aa9432b998f4900c558d21b96849f7821382472ee8275ab01b6c932a0a674821e0ddcb7849bc21d1ca2e7f787670f81090bee81bd
SSDEEP 1536:agDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIcIWlmyU:ELRrO10TiJD9yjqrilyxOWPU
TLSH
T14CA3AE1C7C52C99EE0058B7047579625A6A2AC19FA304F338340FA5EBF32D17EEE91D8
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

cvogi.dll

Path \??\c:\pedoh\cvogi.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/1368-2-0x0000000000AB0000-0x0000000000B8F000-memory.dmp

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memory/1368-3-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/1368-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/2524-12-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/2524-13-0x0000000002470000-0x0000000002472000-memory.dmp

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memory/2524-14-0x0000000000A00000-0x0000000000ADF000-memory.dmp

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memory/2524-15-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/2524-16-0x0000000002470000-0x0000000002472000-memory.dmp

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memory/2524-21-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/5792-9-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/5792-8-0x0000000000970000-0x0000000000A4F000-memory.dmp

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