farfli | 39d82866821d0a2b81896aba32398b1ee56c8cd1637c53c817740e77d4a9dcce

Analysis

max time kernel
149s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
25/04/2026, 21:24

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General

Target
2026-04-25_ca642eb769f7414f558a13499c2fedf9_coinminer_elex_wannacry.exe
Size 169KB
Sample260425-z81bssh16v
SHA256 39d82866821d0a2b81896aba32398b1ee56c8cd1637c53c817740e77d4a9dcce
MD5 ca642eb769f7414f558a13499c2fedf9
SHA1 c08660ddd9b5c81be0c0c2d795505659bce56482
SHA512 82351a707c7a2f9dcb40d4fa72408daae41ceb9962a5e4bf9edc4902f8846cd94eb480aef65502cd21bb54dec950634c411c79e2c3d2ef5a3f03bba2f52e09f3
SSDEEP 3072:h1qLbqRhEAZqR29I5pmHr8/iOwkZ4YHvpzerWA0luLUq6:h0AZ42S5pp/dWYHBAWd+6
TLSH
T16204F101A759925AD733083F0B27527DA67E7D384F1C75D3A7C8692E9138EE0AA3121F
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery farfli persistence spyware stealer upx

Malware Config

Signatures

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

Detects Farfli Backdoor 4 IoCs

resource	yara_rule
behavioral2/memory/3620-12-0x0000000010000000-0x000000001003A000-memory.dmp	family_farfli
behavioral2/memory/3620-16-0x0000000010000000-0x000000001003A000-memory.dmp	family_farfli
behavioral2/memory/3620-18-0x0000000010000000-0x000000001003A000-memory.dmp	family_farfli
behavioral2/memory/3620-22-0x0000000010000000-0x000000001003A000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 4 IoCs

resource	yara_rule
behavioral2/memory/3620-12-0x0000000010000000-0x000000001003A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3620-16-0x0000000010000000-0x000000001003A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3620-18-0x0000000010000000-0x000000001003A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3620-22-0x0000000010000000-0x000000001003A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Detects executables packed with VMProtect. 4 IoCs

resource	yara_rule
behavioral2/memory/3620-12-0x0000000010000000-0x000000001003A000-memory.dmp	INDICATOR_EXE_Packed_VMProtect
behavioral2/memory/3620-16-0x0000000010000000-0x000000001003A000-memory.dmp	INDICATOR_EXE_Packed_VMProtect
behavioral2/memory/3620-18-0x0000000010000000-0x000000001003A000-memory.dmp	INDICATOR_EXE_Packed_VMProtect
behavioral2/memory/3620-22-0x0000000010000000-0x000000001003A000-memory.dmp	INDICATOR_EXE_Packed_VMProtect

UPX dump on OEP (original entry point) 7 IoCs

resource	yara_rule
behavioral2/files/0x002400000002b133-3.dat	UPX
behavioral2/files/0x001a00000002b3ee-7.dat	UPX
behavioral2/memory/3620-9-0x0000000010000000-0x000000001003A000-memory.dmp	UPX
behavioral2/memory/3620-12-0x0000000010000000-0x000000001003A000-memory.dmp	UPX
behavioral2/memory/3620-16-0x0000000010000000-0x000000001003A000-memory.dmp	UPX
behavioral2/memory/3620-18-0x0000000010000000-0x000000001003A000-memory.dmp	UPX
behavioral2/memory/3620-22-0x0000000010000000-0x000000001003A000-memory.dmp	UPX

Badlisted process makes network request 4 IoCs

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

flow	pid	Process
1	3620	rundll32.exe
4	3620	rundll32.exe
5	3620	rundll32.exe
6	3620	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4660	nhlqk.exe

Executes dropped EXE 1 IoCs

pid	Process
4660	nhlqk.exe

Loads dropped DLL 1 IoCs

pid	Process
3620	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-1-5-21-2122505878-652277452-2375749442-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\jrvyih\\gkcwu.kwg\",Exit"	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)	\??\q:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	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)	\??\p:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\y:	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 1 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x002400000002b133-3.dat	upx

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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-25_ca642eb769f7414f558a13499c2fedf9_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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nhlqk.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
5072	cmd.exe
1616	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
1616	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3620	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
748	2026-04-25_ca642eb769f7414f558a13499c2fedf9_coinminer_elex_wannacry.exe
4660	nhlqk.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 748 wrote to memory of 5072	748	2026-04-25_ca642eb769f7414f558a13499c2fedf9_coinminer_elex_wannacry.exe	80
PID 5072 wrote to memory of 1616	5072	cmd.exe	82
PID 5072 wrote to memory of 4660	5072	cmd.exe	83
PID 4660 wrote to memory of 3620	4660	nhlqk.exe	84

C:\Users\Admin\AppData\Local\Temp\2026-04-25_ca642eb769f7414f558a13499c2fedf9_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-25_ca642eb769f7414f558a13499c2fedf9_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:748
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\nhlqk.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-25_ca642eb769f7414f558a13499c2fedf9_coinminer_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:5072
- - 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:1616
- - C:\Users\Admin\AppData\Local\Temp\nhlqk.exe
    C:\Users\Admin\AppData\Local\Temp\\nhlqk.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-25_ca642eb769f7414f558a13499c2fedf9_coinminer_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4660
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\jrvyih\gkcwu.kwg",Exit C:\Users\Admin\AppData\Local\Temp\nhlqk.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:3620

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

nhlqk.exe

Path C:\Users\Admin\AppData\Local\Temp\nhlqk.exe
Size 169KB
SHA256 2777f1c40829bd960d938cdc6d06ec27c5082eed4b2e6acdda7de9ae9edcc6f0
MD5 ea6e98f8ef3c73566c4f60dde27d96df
SHA1 7fca3732decde1996f96df3b64c614178d79eb2e
SHA512 7d054faef5ba7c7a7331a2d01e0ad44d0f22e51ffeef7ec740113d875b2e58b0b2f0be615a9f6c383ccf96ca52cd30baf52c8e8bf8e229acff15781e3f6441c5
SSDEEP 3072:h1qLbqRhEAZqR29I5pmHr8/iOwkZ4YHvpzerWA0luLUql:h0AZ42S5pp/dWYHBAWd+l
TLSH
T1EA04E101A759925AD733083F0B27527DA6BD7D384F1C75D3A7C8692E9138EE0AA3121F
MD5 SHA1 SHA512 SSDEEP TLSH

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gkcwu.kwg

Path \??\c:\jrvyih\gkcwu.kwg
Size 116KB
SHA256 53a1a5f96fce740b377bb053a358c0a50c63dfafddb8925d9aca66c852420872
MD5 f05a84544193f908045a170532883815
SHA1 3ad06ef6cc572a5e363d7fe05dcde5e646445994
SHA512 eda15ad3d6656a0146fd9476b205d1aefb7f4f6ecd1ea73b46b39157bb62f99d531114fc5ea32de485382577a7cbff4ae0edd4efdab1706c9840a9d165bac2ff
SSDEEP 3072:fCp96vhbrOz3bCMqKZ0V4Slz+n14q1/Jo5z5i4:6p961rOrDrZddJoz5i4
TLSH
T170C302D9B720C9EDC7E2727884BF6271170B908E4879D22F6CEEF89294711D0F0425B6
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/748-1-0x00000000009B0000-0x0000000000A2B000-memory.dmp

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memory/3620-9-0x0000000010000000-0x000000001003A000-memory.dmp

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memory/3620-12-0x0000000010000000-0x000000001003A000-memory.dmp

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memory/3620-10-0x00000000029A0000-0x0000000002C2B000-memory.dmp

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memory/3620-16-0x0000000010000000-0x000000001003A000-memory.dmp

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memory/3620-18-0x0000000010000000-0x000000001003A000-memory.dmp

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memory/3620-22-0x0000000010000000-0x000000001003A000-memory.dmp

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memory/3620-24-0x00000000029A0000-0x0000000002C2B000-memory.dmp

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memory/3620-36-0x00000000029A0000-0x0000000002C2B000-memory.dmp

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memory/4660-6-0x00000000009C0000-0x0000000000A3B000-memory.dmp

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