farfli | 75f2a1ee91a929ce6a320619d74c55f30167768dc256c3be87081cd12a8e0909

Analysis

max time kernel
148s
max time network
138s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260710-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
20/08/2026, 05:41

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General

Target
2026-08-20_911f0e4c354892296a5ccc450a8477c3_elex_wannacry.exe
Size 118KB
Sample260820-gdjrfss1e1
SHA256 75f2a1ee91a929ce6a320619d74c55f30167768dc256c3be87081cd12a8e0909
MD5 911f0e4c354892296a5ccc450a8477c3
SHA1 060283390d8c01d3517c5f587edcdd7138d3278f
SHA512 d6cd4d4f2994d46498672a3663cfde87a9b58037968ea9275b065a83ac4314f353a13cc7cfc79ad84edc2846d93e77fad2b103176ee62935ad50a4c5a409a6f6
SSDEEP 3072:xK4RNx6nb4RoIw/XBSeral6oaE0HGnvXuEOrc0pyZ:xl6XYeel6GGGVO8Z
TLSH
T1D6C3AF479BA58DD5E0111CF502ABBB3583B6988D3B15A757C388DE0EE03DE84DB362C9
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/1612-10-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/1612-12-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/1612-13-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/1612-14-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/1612-15-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 5 IoCs

resource	yara_rule
behavioral2/memory/1612-10-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1612-12-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1612-13-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1612-14-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1612-15-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 8 IoCs

resource	yara_rule
behavioral2/memory/5504-6-0x0000000000400000-0x0000000000417000-memory.dmp	UPX
behavioral2/files/0x000e00000001c4f3-7.dat	UPX
behavioral2/memory/1612-9-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/1612-10-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/1612-12-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/1612-13-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/1612-14-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/1612-15-0x0000000010000000-0x0000000010024000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
7	1612	rundll32.exe
9	1612	rundll32.exe
10	1612	rundll32.exe
11	1612	rundll32.exe
12	1612	rundll32.exe
14	1612	rundll32.exe
16	1612	rundll32.exe
17	1612	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000e00000001c4f3-7.dat	acprotect

Deletes itself 1 IoCs

pid	Process
5504	tusxj.exe

Executes dropped EXE 1 IoCs

pid	Process
5504	tusxj.exe

Loads dropped DLL 1 IoCs

pid	Process
1612	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-1-5-21-2301830172-776172150-2531349243-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\punwziar\\npgog.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)	\??\k:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	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/0x000e00000001c4f3-7.dat	upx
behavioral2/memory/1612-9-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/1612-10-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/1612-12-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/1612-13-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/1612-14-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/1612-15-0x0000000010000000-0x0000000010024000-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
4864	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	tusxj.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-20_911f0e4c354892296a5ccc450a8477c3_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

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
4864	cmd.exe
3404	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
3404	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1612	rundll32.exe
1612	rundll32.exe
1612	rundll32.exe
1612	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1612	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3936	2026-08-20_911f0e4c354892296a5ccc450a8477c3_elex_wannacry.exe
5504	tusxj.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3936 wrote to memory of 4864	3936	2026-08-20_911f0e4c354892296a5ccc450a8477c3_elex_wannacry.exe	89
PID 4864 wrote to memory of 3404	4864	cmd.exe	91
PID 4864 wrote to memory of 5504	4864	cmd.exe	92
PID 5504 wrote to memory of 1612	5504	tusxj.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-20_911f0e4c354892296a5ccc450a8477c3_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-20_911f0e4c354892296a5ccc450a8477c3_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3936
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\tusxj.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-20_911f0e4c354892296a5ccc450a8477c3_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:4864
- - 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:3404
- - \??\c:\tusxj.exe
    c:\tusxj.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-20_911f0e4c354892296a5ccc450a8477c3_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:5504
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\punwziar\npgog.dll",init c:\tusxj.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:1612

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

Replay Monitor

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Downloads

npgog.dll

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

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tusxj.exe

Path \??\c:\tusxj.exe
Size 119KB
SHA256 61515c5f82984fe08fab71c421ff54f96960eec369a87118cd300350a8663609
MD5 6957b7ae21b9717b3f193b772f43c55c
SHA1 90524bad7e3397d71bf63267e2273575ddb10902
SHA512 68c26a916e96581be366523e9b163074f343f485b1fa01d2bb3ded1bfba43518b41e2d6f979060192952f8be01d66f081518728597b4846e087f36b42954ab9b
SSDEEP 3072:xK4RNx6nb4RoIw/XBSeral6oaE0HGnvXuEOrc0pyD:xl6XYeel6GGGVO8D
TLSH
T16EC3AF479BA58DD5E0111CF502ABBB3583B6988D3B156757C388DE0EE03DE84DB362C9
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1612-9-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/1612-10-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/1612-12-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/1612-13-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/1612-14-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/1612-15-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/3936-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3936-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/5504-6-0x0000000000400000-0x0000000000417000-memory.dmp

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