farfli | c3b1fca310b69fbacb30fd7a0dfd4bc07edbce68b6f31ec9ca5941732b17e295

Analysis

max time kernel
150s
max time network
139s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
19/08/2026, 07:55

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
2026-08-19_b7c1ead72313d2e179c8e61260576ce7_coinminer_elex_wannacry.exe
Size 312KB
Sample260819-jsg8aazdle
SHA256 c3b1fca310b69fbacb30fd7a0dfd4bc07edbce68b6f31ec9ca5941732b17e295
MD5 b7c1ead72313d2e179c8e61260576ce7
SHA1 facea4a9d09c43c2e2cfd5ff50f2aa0efb9ac27f
SHA512 5e64fecb0ff6a1967ae3c8d0dad11bacfbdd125eb5201c80ccd67ecb370179d5ddfc3a47dc191219c11729ec26c2d2dc6d52096f65f73479fb4e597abd2df00e
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrO/:ywLcCmuErglr73aAD+8
TLSH
T19A64F142D511CF47FC2FCAB6823E1E355317AE553B205693D3C8BA1F65B2B42A63A0D8
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 7 IoCs

resource	yara_rule
behavioral2/memory/2204-13-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/2204-11-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/2204-15-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/2204-17-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/2204-18-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/2204-19-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/2204-20-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 7 IoCs

resource	yara_rule
behavioral2/memory/2204-13-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2204-11-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2204-15-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2204-17-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2204-18-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2204-19-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2204-20-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/5712-0-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral2/memory/5712-2-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral2/files/0x00130000000118e9-3.dat	UPX
behavioral2/memory/5312-6-0x0000000000400000-0x0000000000483000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
1	2204	rundll32.exe
2	2204	rundll32.exe
3	2204	rundll32.exe
4	2204	rundll32.exe
5	2204	rundll32.exe
6	2204	rundll32.exe
7	2204	rundll32.exe
8	2204	rundll32.exe

Deletes itself 1 IoCs

pid	Process
5312	nuimh.exe

Executes dropped EXE 1 IoCs

pid	Process
5312	nuimh.exe

Loads dropped DLL 1 IoCs

pid	Process
2204	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-1-5-21-1014449518-1831897916-4205727055-1000\Software\Microsoft\Windows\CurrentVersion\Run\Wetor = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\fdnls\\punlmysk.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)	\??\o:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	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)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\m:	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/5712-0-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral2/memory/5712-2-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral2/files/0x00130000000118e9-3.dat	upx
behavioral2/memory/5312-6-0x0000000000400000-0x0000000000483000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\fdnls	nuimh.exe
File created	\??\c:\Program Files\fdnls\punlmysk.dll	nuimh.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
5088	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nuimh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-19_b7c1ead72313d2e179c8e61260576ce7_coinminer_elex_wannacry.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
5088	cmd.exe
832	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
832	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2204	rundll32.exe
2204	rundll32.exe
2204	rundll32.exe
2204	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2204	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5712	2026-08-19_b7c1ead72313d2e179c8e61260576ce7_coinminer_elex_wannacry.exe
5312	nuimh.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5712 wrote to memory of 5088	5712	2026-08-19_b7c1ead72313d2e179c8e61260576ce7_coinminer_elex_wannacry.exe	89
PID 5088 wrote to memory of 832	5088	cmd.exe	91
PID 5088 wrote to memory of 5312	5088	cmd.exe	92
PID 5312 wrote to memory of 2204	5312	nuimh.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-19_b7c1ead72313d2e179c8e61260576ce7_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-19_b7c1ead72313d2e179c8e61260576ce7_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5712
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\nuimh.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-19_b7c1ead72313d2e179c8e61260576ce7_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:5088
- - 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:832
- - C:\Users\Admin\AppData\Local\Temp\nuimh.exe
    C:\Users\Admin\AppData\Local\Temp\\nuimh.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-19_b7c1ead72313d2e179c8e61260576ce7_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:5312
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\fdnls\punlmysk.dll",GetProc C:\Users\Admin\AppData\Local\Temp\nuimh.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:2204

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

Loading Replay Monitor...

Downloads

nuimh.exe

Path C:\Users\Admin\AppData\Local\Temp\nuimh.exe
Size 312KB
SHA256 a6200010b81d33c90ef13b130b2b963f782d2520776c50660d500c679003e4bb
MD5 b2a129139b9450775c71b565fef391d0
SHA1 541ce287479aed12af7340d5bed74b63ab27d80f
SHA512 674d57cf448b0f933eec1445cdce2279dab121da3d5096aa35cf386e867697b7404e7b4743b72b3162760c8e7923cfe66587172216a76ccc3065f865699ebba6
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrOO:ywLcCmuErglr73aAD+P
TLSH
T19964F141D511CF47FC2FCAB6823E1E355317AE553B2056A3D3C8BA1F65B2B42A63A0D8
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

punlmysk.dll

Path \??\c:\Program Files\fdnls\punlmysk.dll
Size 218KB
SHA256 e51a6bbc867d7a4557533093e04f65b78e1e7fdc94a7732435cd22eef8ed04ab
MD5 8b1c12d914ecfeec5b2e2e25ca98de99
SHA1 f6cae3b8e0ce454678d9a442ad3733daf105f026
SHA512 5a61a01ec405169e574ca985bacfb2993c539cdb001e46022917cf90861083d2a08f5fa7e40aaceae7bf5dd3cda113f52943aac1eb8b3e85f2f2cfcdcf172b2e
SSDEEP 6144:KORxNwD2VOidhzeXwddDzLi5vOQEqscr0ZTJauyti:pnNwDTi3swddDiROXIs
TLSH
T12E24128BCF983873C5223339597951A0B9725290AFA1570DD2E6D34FA072BA2CF7B531
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2204-15-0x0000000010000000-0x0000000010058000-memory.dmp

Download

memory/2204-12-0x00000000009B0000-0x00000000009B1000-memory.dmp

Download

memory/2204-13-0x0000000010000000-0x0000000010058000-memory.dmp

Download

memory/2204-11-0x0000000010000000-0x0000000010058000-memory.dmp

Download

memory/2204-9-0x0000000010000000-0x0000000010058000-memory.dmp

Download

memory/2204-17-0x0000000010000000-0x0000000010058000-memory.dmp

Download

memory/2204-18-0x0000000010000000-0x0000000010058000-memory.dmp

Download

memory/2204-19-0x0000000010000000-0x0000000010058000-memory.dmp

Download

memory/2204-20-0x0000000010000000-0x0000000010058000-memory.dmp

Download

memory/5312-6-0x0000000000400000-0x0000000000483000-memory.dmp

Download

memory/5712-2-0x0000000000400000-0x0000000000483000-memory.dmp

Download

memory/5712-0-0x0000000000400000-0x0000000000483000-memory.dmp

Download