farfli | babd66e447e48d0b3d74ee26394c68896b2b7537be086468e2c7d88ba9c6e7da

Analysis

max time kernel
150s
max time network
146s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
17/07/2026, 10:41

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General

Target
2026-07-17_db465770684db0a1ab838c0b137912b1_elex_wannacry.exe
Size 86KB
Sample260717-mrj72ahs3m
SHA256 babd66e447e48d0b3d74ee26394c68896b2b7537be086468e2c7d88ba9c6e7da
MD5 db465770684db0a1ab838c0b137912b1
SHA1 5585af5d51c807414dd29f5c56ae2566aa60e9af
SHA512 5e3cdb67665e8656cbbc51a4d94b739ab21f36bb6412b5743381cf8e29696c4521c0a4920ea4e0ad622a5e3f370b4d11d7074e87d0ed6e4d0d187473a6a61fc0
SSDEEP 1536:m/14ZaKO/myxZmAijMcCwVVydoM1bKAQAH9M53e+iWtnSdy:a14ZaKOTZSMcJVgDKxAH9MhtfSdy
TLSH
T13283CF232FBB4136DD449F751E6B2669E6F2BC36212082728B5C9D8DEA3CE45DB0171C
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 3 IoCs

resource	yara_rule
behavioral2/memory/1636-11-0x0000000010000000-0x0000000010021000-memory.dmp	family_farfli
behavioral2/memory/1636-13-0x0000000010000000-0x0000000010021000-memory.dmp	family_farfli
behavioral2/memory/1636-14-0x0000000010000000-0x0000000010021000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/1636-11-0x0000000010000000-0x0000000010021000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1636-13-0x0000000010000000-0x0000000010021000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1636-14-0x0000000010000000-0x0000000010021000-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	1636	rundll32.exe
5	1636	rundll32.exe
6	1636	rundll32.exe
12	1636	rundll32.exe
13	1636	rundll32.exe
14	1636	rundll32.exe
17	1636	rundll32.exe
18	1636	rundll32.exe

Deletes itself 1 IoCs

pid	Process
6056	isjck.exe

Executes dropped EXE 1 IoCs

pid	Process
6056	isjck.exe

Loads dropped DLL 1 IoCs

pid	Process
1636	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-1-5-21-1738198120-2966725515-3980530802-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\fktoamccr\\nxmlfyti.dll\",GetWindowClass"	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)	\??\i:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	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)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\g:	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)	\??\w:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\m:	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	2026-07-17_db465770684db0a1ab838c0b137912b1_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	isjck.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
5380	cmd.exe
6140	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
6140	PING.EXE

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1636	rundll32.exe
1636	rundll32.exe
1636	rundll32.exe
1636	rundll32.exe
1636	rundll32.exe
1636	rundll32.exe
1636	rundll32.exe
1636	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1636	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2496	2026-07-17_db465770684db0a1ab838c0b137912b1_elex_wannacry.exe
6056	isjck.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2496 wrote to memory of 5380	2496	2026-07-17_db465770684db0a1ab838c0b137912b1_elex_wannacry.exe	87
PID 5380 wrote to memory of 6140	5380	cmd.exe	89
PID 5380 wrote to memory of 6056	5380	cmd.exe	91
PID 6056 wrote to memory of 1636	6056	isjck.exe	92

C:\Users\Admin\AppData\Local\Temp\2026-07-17_db465770684db0a1ab838c0b137912b1_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-17_db465770684db0a1ab838c0b137912b1_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2496
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\isjck.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-17_db465770684db0a1ab838c0b137912b1_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:5380
- - 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:6140
- - \??\c:\isjck.exe
    c:\isjck.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-17_db465770684db0a1ab838c0b137912b1_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:6056
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\fktoamccr\nxmlfyti.dll",GetWindowClass c:\isjck.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:1636

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

nxmlfyti.dll

Path \??\c:\fktoamccr\nxmlfyti.dll
Size 43KB
SHA256 0b747c32730f2ad29b44299054bc22f8075702b081e91edaaead528abca227d2
MD5 0164aeb78f4d2181e817a9a6b0ad22f1
SHA1 c56c6a743e48e8652707a34e4cddc1f645f140ea
SHA512 e69ad90790d8062a903954f7ea85cacd241113afaf0eb16098f473835cffcda6e1f9fa9844a8618cc297fffa2e6ff7d458f9ebb2ce3febf7ffd683ffd6ad44f5
SSDEEP 768:2DdBa8mqIOiSUZrBGhvQLq6UYiaKRsRMwwY2BjkTrXW/VJZ581swUqHhiQREQoJs:kwqnPUb+v0q6UY+sRMwwY2Jkal+1ZUqJ
TLSH
T19613F133EACCDFDFF8A05271C576D0FCD337AC2849669A0395A0219D9D60948B878F66
MD5 SHA1 SHA512 SSDEEP TLSH

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isjck.exe

Path \??\c:\isjck.exe
Size 86KB
SHA256 efbdba18b63a7cd133be6b552017031e839589c039e1ad4198b314c13f0ff987
MD5 db88639ac554c418cd257e2b42f1bdcb
SHA1 affd18f67dd1376b8c1866192278e218a072e7a5
SHA512 44ae22c8f803d0131172b2cc9354fd89c584c85da8879af445df0e4b0ea4c5ff173ccde7c93ccb6b62222d2d7affb04ccc55b1cd5a0df9256cd3389b36d93bb1
SSDEEP 1536:m/14ZaKO/myxZmAijMcCwVVydoM1bKAQAH9M53e+iWtnSdq:a14ZaKOTZSMcJVgDKxAH9MhtfSdq
TLSH
T16D83CF232FBB4175DD44AF711E6B2669E6F2BC36212082728B5C9D8DEA3CE05DB0131C
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1636-9-0x0000000010000000-0x0000000010021000-memory.dmp

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memory/1636-10-0x00000000017B0000-0x00000000017B2000-memory.dmp

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memory/1636-11-0x0000000010000000-0x0000000010021000-memory.dmp

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memory/1636-13-0x0000000010000000-0x0000000010021000-memory.dmp

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memory/1636-14-0x0000000010000000-0x0000000010021000-memory.dmp

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memory/2496-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/2496-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/6056-6-0x0000000000400000-0x0000000000417000-memory.dmp

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