farfli | 5e7c01ab19fa7dd795879992158bfec821d37da635ef094f6ea8ae752f8c7beb

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
08/08/2026, 14:18

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General

Target
2026-08-08_b19360214e2bf1f22ade177c7213cc60_elex_wannacry.exe
Size 129KB
Sample260808-rmf22asvft
SHA256 5e7c01ab19fa7dd795879992158bfec821d37da635ef094f6ea8ae752f8c7beb
MD5 b19360214e2bf1f22ade177c7213cc60
SHA1 35baa5f2824d46a965e6e123688d9dfcdc07c03d
SHA512 7980b113dd2a3133b37f7e13f3af5a723d8e93d58ac31b4e116cf2b370c88f364415a346882385cce0ba9af6d6ae1061cdaf7f8cc854e675206052a427867b57
SSDEEP 3072:xK4RNx6nb4RoIw/XBSeral6oaE0HGnvXuEOrc0p:xl6XYeel6GGGVO
TLSH
T1ECD38C529BB189D5E0111CF4039BBB3483B6988D3B15A363D388DF0EE42DE85DB362D9
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli persistence spyware stealer upx

Malware Config

Signatures

Family: Farfli
Farfli is a Windows backdoor written in C++.
backdoor farfli

Detects Farfli Backdoor 5 IoCs

resource	yara_rule
behavioral2/memory/6052-10-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/6052-12-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/6052-13-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/6052-14-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/6052-15-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 5 IoCs

resource	yara_rule
behavioral2/memory/6052-10-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/6052-12-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/6052-13-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/6052-14-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/6052-15-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 8 IoCs

resource	yara_rule
behavioral2/memory/4808-6-0x0000000000400000-0x0000000000417000-memory.dmp	UPX
behavioral2/files/0x000d00000001c51a-7.dat	UPX
behavioral2/memory/6052-9-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/6052-10-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/6052-12-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/6052-13-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/6052-14-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/6052-15-0x0000000010000000-0x0000000010024000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
5	6052	rundll32.exe
7	6052	rundll32.exe
8	6052	rundll32.exe
9	6052	rundll32.exe
10	6052	rundll32.exe
11	6052	rundll32.exe
13	6052	rundll32.exe
14	6052	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000d00000001c51a-7.dat	acprotect

Deletes itself 1 IoCs

pid	Process
4808	slntw.exe

Executes dropped EXE 1 IoCs

pid	Process
4808	slntw.exe

Loads dropped DLL 1 IoCs

pid	Process
6052	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:\\nkdlj\\oxkry.dll\",init"	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)	\??\d:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\a:	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)	\??\q:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	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

UPX packed file 7 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/files/0x000d00000001c51a-7.dat	upx
behavioral2/memory/6052-9-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/6052-10-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/6052-12-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/6052-13-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/6052-14-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/6052-15-0x0000000010000000-0x0000000010024000-memory.dmp	upx

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
4640	cmd.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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	slntw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-08_b19360214e2bf1f22ade177c7213cc60_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
4640	cmd.exe
4816	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
4816	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
6052	rundll32.exe
6052	rundll32.exe
6052	rundll32.exe
6052	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	6052	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4396	2026-08-08_b19360214e2bf1f22ade177c7213cc60_elex_wannacry.exe
4808	slntw.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4396 wrote to memory of 4640	4396	2026-08-08_b19360214e2bf1f22ade177c7213cc60_elex_wannacry.exe	89
PID 4640 wrote to memory of 4816	4640	cmd.exe	91
PID 4640 wrote to memory of 4808	4640	cmd.exe	92
PID 4808 wrote to memory of 6052	4808	slntw.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-08_b19360214e2bf1f22ade177c7213cc60_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-08_b19360214e2bf1f22ade177c7213cc60_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4396
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\slntw.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-08_b19360214e2bf1f22ade177c7213cc60_elex_wannacry.exe"
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4640
- - 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:4816
- - \??\c:\slntw.exe
    c:\slntw.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-08_b19360214e2bf1f22ade177c7213cc60_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4808
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\nkdlj\oxkry.dll",init c:\slntw.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:6052

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

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

oxkry.dll

Path \??\c:\nkdlj\oxkry.dll
Size 46KB
SHA256 b6bc7902da0250f6ca920b35b222f6a0fe62102caf05d2a1722c4d3b225a0a9e
MD5 42fe886bcb6460f7c2a46e21ecac5da6
SHA1 7d9a1c9fe17121cf61444da965f29e974a95ede2
SHA512 3d1a7dc1d9ca8a4376302ba20df584ad59b98e0d3b18b06b22d7f5a455833ce124e412fc1922a3b704dcbafa31987cda3115c9a71dd6299683502cebae33567c
SSDEEP 768:P60NIyOvlPSGxZ00FBsMT0fdB5h3vU7ExCClpoduUglNgLoR/C:P6e4lP5rvz1Vd8H/C
TLSH
T10023F15733A8577BC9E621FA3263BE142B357019CB3A83545CB9B6572C21C8D927930F
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

slntw.exe

Path \??\c:\slntw.exe
Size 129KB
SHA256 24859fe8cdcd333d08da255e1190c0ebf6f351b21bdeb7e857e2a9e24d4e9c1b
MD5 e3785a9d212339354cb98f3453b59134
SHA1 61dc65099f54d0ad07bc4051e75b3137f3ac4a12
SHA512 c50d7b70c8d43f235c0e14a2b092796c26ad2460b422f45c32aaf88604e33f6049792d03c9ae1a8da5a1e194024057dc051fb189f98691fa2eb5b41c218ac3d7
SSDEEP 3072:xK4RNx6nb4RoIw/XBSeral6oaE0HGnvXuEOrc0pf:xl6XYeel6GGGVOF
TLSH
T11BD38C529BB589D5E0111CF4039BBB3483B6988D3B15A363D388DF0EE42DE85DB362D9
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4396-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4396-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4808-6-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/6052-9-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/6052-10-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/6052-12-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/6052-13-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/6052-14-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/6052-15-0x0000000010000000-0x0000000010024000-memory.dmp

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