farfli | f4027bd24e2cd150fb05a9adec9e89b52441b68eacb29748ca5113fa03f8f958

Analysis

max time kernel
150s
max time network
139s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260710-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
08/08/2026, 05:04

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General

Target
2026-08-08_284b017b7c5edf1685d8bdd7e24abf99_coinminer_elex_wannacry.exe
Size 312KB
Sample260808-fp8z2styfs
SHA256 f4027bd24e2cd150fb05a9adec9e89b52441b68eacb29748ca5113fa03f8f958
MD5 284b017b7c5edf1685d8bdd7e24abf99
SHA1 23cabb3f45617095976b97d637877c185777dce9
SHA512 aa433aa14f128ba32a41b1cf1b1d3aaf8d83ab273c1562374b49cd1302804ae651d3ef6f57882b4dba8e9ca8e267b08b819c59f74935c06e58269ce042b99817
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrO1:ywLcCmuErglr73aAD+Q
TLSH
T16464F142D511CF47FC2FCAB5823E1E355317AE553B2056A3D3C8BA1F65B2B42A63A0D8
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 6 IoCs

resource	yara_rule
behavioral2/memory/5528-11-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/5528-13-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/5528-15-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/5528-18-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/5528-19-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/5528-20-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 6 IoCs

resource	yara_rule
behavioral2/memory/5528-11-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5528-13-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5528-15-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5528-18-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5528-19-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5528-20-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2488-0-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral2/memory/2488-2-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral2/files/0x0009000000019cb5-3.dat	UPX
behavioral2/memory/4816-6-0x0000000000400000-0x0000000000483000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
6	5528	rundll32.exe
8	5528	rundll32.exe
9	5528	rundll32.exe
10	5528	rundll32.exe
12	5528	rundll32.exe
13	5528	rundll32.exe
14	5528	rundll32.exe
15	5528	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4816	ptueu.exe

Executes dropped EXE 1 IoCs

pid	Process
4816	ptueu.exe

Loads dropped DLL 1 IoCs

pid	Process
5528	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-1-5-21-2246396966-3025826688-3847171515-1000\Software\Microsoft\Windows\CurrentVersion\Run\Wetor = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\qyqoy\\remzihon.dll\",GetProc"	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)	\??\l:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\i:	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)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	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 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2488-0-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral2/memory/2488-2-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral2/files/0x0009000000019cb5-3.dat	upx
behavioral2/memory/4816-6-0x0000000000400000-0x0000000000483000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	\??\c:\Program Files\qyqoy\remzihon.dll	ptueu.exe
File opened for modification	\??\c:\Program Files\qyqoy	ptueu.exe

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
4156	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	ptueu.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-08_284b017b7c5edf1685d8bdd7e24abf99_coinminer_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
4156	cmd.exe
4880	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
4880	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5528	rundll32.exe
5528	rundll32.exe
5528	rundll32.exe
5528	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5528	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2488	2026-08-08_284b017b7c5edf1685d8bdd7e24abf99_coinminer_elex_wannacry.exe
4816	ptueu.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2488 wrote to memory of 4156	2488	2026-08-08_284b017b7c5edf1685d8bdd7e24abf99_coinminer_elex_wannacry.exe	89
PID 4156 wrote to memory of 4880	4156	cmd.exe	91
PID 4156 wrote to memory of 4816	4156	cmd.exe	92
PID 4816 wrote to memory of 5528	4816	ptueu.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-08_284b017b7c5edf1685d8bdd7e24abf99_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-08_284b017b7c5edf1685d8bdd7e24abf99_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2488
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\ptueu.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-08_284b017b7c5edf1685d8bdd7e24abf99_coinminer_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:4156
- - 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:4880
- - C:\Users\Admin\AppData\Local\Temp\ptueu.exe
    C:\Users\Admin\AppData\Local\Temp\\ptueu.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-08_284b017b7c5edf1685d8bdd7e24abf99_coinminer_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4816
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\qyqoy\remzihon.dll",GetProc C:\Users\Admin\AppData\Local\Temp\ptueu.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:5528

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

ptueu.exe

Path C:\Users\Admin\AppData\Local\Temp\ptueu.exe
Size 312KB
SHA256 829e84ba21e459e0c72ef93d2b7aae61daed32b7a3e5aa91aae887694258c137
MD5 ffac7e064c5c8b986868643f43e3711d
SHA1 8ab2624da7c0c318a34cbc9961fdf5369d549bb6
SHA512 2e0549e520a47e7f9369cd4151b45107221a665ced908713e18c3fa039f26a27cd2bdd98db3df0abd2f4eef95fc3f1064f7667f0373e141c8f68fcf102048cdc
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrO6:ywLcCmuErglr73aAD+x
TLSH
T17E64F141D511CF47FC2FCAB5823E1E355317AE153B205663D3C8BA1FA5B2B42A63A0E8
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

remzihon.dll

Path \??\c:\Program Files\qyqoy\remzihon.dll
Size 218KB
SHA256 f36f8c3753bbaf6817a2148ee8a44d3a50a9797d1aaf8171c38c1fef7e2ae86d
MD5 fd72c2650bf5aa2c4caa7632a84b16af
SHA1 3e36712c71b12a8631340c4d32137b03be5bdb2b
SHA512 bde733c0ab23db445030ecb13d90d7bdafd33c859421518cd9e6f5aa6b01815596d195aef3f9a84dce83f3014efea9045abe595c55fe2528b488923468dc8eb9
SSDEEP 6144:KORxNwD2VOidhzeXwddDzLi5vOQEqscr0ZTJauytR:pnNwDTi3swddDiROXI/
TLSH
T171241287CF983873C5223379597951A0B9324290AFA1530DD2E6D34FA072BA2CF7B531
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2488-0-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/2488-2-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/4816-6-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/5528-9-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/5528-10-0x0000000000CE0000-0x0000000000CE1000-memory.dmp

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memory/5528-11-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/5528-13-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/5528-15-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/5528-16-0x0000000000CE0000-0x0000000000CE1000-memory.dmp

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memory/5528-18-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/5528-19-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/5528-20-0x0000000010000000-0x0000000010058000-memory.dmp

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