farfli | 75be5681a562a0f24264a166a3d0312f100045316bbb001569607567ad0417de

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
06/05/2026, 07:33

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General

Target
2026-05-06_d265999390ed5b6a2003d037f0b98896_elex_wannacry.exe
Size 95KB
Sample260506-jdq7msgx5k
SHA256 75be5681a562a0f24264a166a3d0312f100045316bbb001569607567ad0417de
MD5 d265999390ed5b6a2003d037f0b98896
SHA1 05fc47c4b92e49a8fb89cec7a46dd462b00c0e04
SHA512 4084a304145715564f2e5744a96a7b780870fdda6fedbb7f0681a74041e7a62fc2f90d8df5853868ba8e2b88cb5003358b941961df9a99486477d93790658fa7
SSDEEP 1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmyG:uLRrO10TiJD9yjqrilyxOuP
TLSH
T15FA39C5C6D62C5AEE4014B7443579321A6B2AC59FA304F334380BA4EFF36D1BEDE9198
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
behavioral1/memory/4236-13-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral1/memory/4236-19-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral1/memory/4236-13-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4236-19-0x0000000010000000-0x0000000010023000-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	4236	rundll32.exe
5	4236	rundll32.exe
6	4236	rundll32.exe
7	4236	rundll32.exe
17	4236	rundll32.exe
23	4236	rundll32.exe
34	4236	rundll32.exe
55	4236	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4492	crtup.exe

Executes dropped EXE 1 IoCs

pid	Process
4492	crtup.exe

Loads dropped DLL 1 IoCs

pid	Process
4236	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:\\htprd\\mfqmn.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)	\??\x:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\t:	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)	\??\l:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\v:	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	2026-05-06_d265999390ed5b6a2003d037f0b98896_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	crtup.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
2976	cmd.exe
1924	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
1924	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4236	rundll32.exe
4236	rundll32.exe
4236	rundll32.exe
4236	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4236	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3544	2026-05-06_d265999390ed5b6a2003d037f0b98896_elex_wannacry.exe
4492	crtup.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3544 wrote to memory of 2976	3544	2026-05-06_d265999390ed5b6a2003d037f0b98896_elex_wannacry.exe	83
PID 2976 wrote to memory of 1924	2976	cmd.exe	85
PID 2976 wrote to memory of 4492	2976	cmd.exe	86
PID 4492 wrote to memory of 4236	4492	crtup.exe	87

C:\Users\Admin\AppData\Local\Temp\2026-05-06_d265999390ed5b6a2003d037f0b98896_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-06_d265999390ed5b6a2003d037f0b98896_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3544
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\crtup.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-06_d265999390ed5b6a2003d037f0b98896_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2976
- - 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:1924
- - C:\Users\Admin\AppData\Local\Temp\crtup.exe
    C:\Users\Admin\AppData\Local\Temp\\crtup.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-06_d265999390ed5b6a2003d037f0b98896_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4492
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\htprd\mfqmn.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\crtup.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:4236

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

crtup.exe

Path C:\Users\Admin\AppData\Local\Temp\crtup.exe
Size 95KB
SHA256 8aeb2c6e0f76cb2a662948bb13f4d1c6e789306f2016cf0009f7739cd8301afc
MD5 82fc0d4ba04b15ac2977ac822d877af6
SHA1 2495b29126abc7ef10ea4634e6f236862f20038f
SHA512 888209ea217c93a419a943e1ea0f59a45a375eb512fbfc7bd44fd304b15d79db86939c0aac3cb0ff18c8c445854a2ec055f55cc00456b99b26fb56fefae24152
SSDEEP 1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmyGh:uLRrO10TiJD9yjqrilyxOuPu
TLSH
T100A38C5C6D62C59EE4014B7443579321A6A2AC59FA304F334380BA4EFF36E1BEDE91D8
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

mfqmn.dll

Path \??\c:\htprd\mfqmn.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/3544-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3544-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4236-10-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/4236-11-0x0000000001540000-0x0000000001542000-memory.dmp

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memory/4236-12-0x0000000000FA0000-0x0000000000FDB000-memory.dmp

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memory/4236-14-0x0000000001540000-0x0000000001542000-memory.dmp

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memory/4236-13-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/4236-19-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/4492-7-0x0000000000400000-0x0000000000417000-memory.dmp

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