farfli | 8342a06409d3d5fb83c4f4365e54ba67a8e5dd857635c694bb66fe2d364983c4

Analysis

max time kernel
148s
max time network
143s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
20/09/2026, 23:24

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General

Target
2026-09-20_e445be2d24c9a52634e1cd5b17c7ae00_coinminer_elex_wannacry.exe
Size 404KB
Sample260920-3d4yaavvhx
SHA256 8342a06409d3d5fb83c4f4365e54ba67a8e5dd857635c694bb66fe2d364983c4
MD5 e445be2d24c9a52634e1cd5b17c7ae00
SHA1 aab8e52b6808b3bf8e3af223dd2dde3079df7d71
SHA512 11904a00d3d3d3bf5e360f1b430418d5bcd2ed04da15a57f63cf794b233253e2bacd72a9452bfe0986f4f9bb4dae15f07f323a8915d92cff8f324c965f056fd1
SSDEEP 12288:zdDU6g13sJd1fm/+yb3O2js82ydU/DdKumH:zdE3sJd1fm/+yb3OYs84/JH6
TLSH
T10A94AF01E68741D6DE8225B081FA7376B378DA4D0F12C7E3BB68EE2F6E211D1953B119
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli persistence spyware stealer

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/4696-10-0x0000000010000000-0x0000000010033000-memory.dmp	family_farfli
behavioral2/memory/4696-11-0x0000000010000000-0x0000000010033000-memory.dmp	family_farfli
behavioral2/memory/4696-13-0x0000000010000000-0x0000000010033000-memory.dmp	family_farfli
behavioral2/memory/4696-18-0x0000000010000000-0x0000000010033000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 4 IoCs

resource	yara_rule
behavioral2/memory/4696-10-0x0000000010000000-0x0000000010033000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4696-11-0x0000000010000000-0x0000000010033000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4696-13-0x0000000010000000-0x0000000010033000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4696-18-0x0000000010000000-0x0000000010033000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 9 IoCs

resource	yara_rule
behavioral2/memory/4872-0-0x0000000000400000-0x0000000000471000-memory.dmp	UPX
behavioral2/memory/4872-2-0x0000000000400000-0x0000000000471000-memory.dmp	UPX
behavioral2/files/0x001300000001b1c0-3.dat	UPX
behavioral2/files/0x000e00000001c49f-8.dat	UPX
behavioral2/memory/5328-7-0x0000000000400000-0x0000000000471000-memory.dmp	UPX
behavioral2/memory/4696-10-0x0000000010000000-0x0000000010033000-memory.dmp	UPX
behavioral2/memory/4696-11-0x0000000010000000-0x0000000010033000-memory.dmp	UPX
behavioral2/memory/4696-13-0x0000000010000000-0x0000000010033000-memory.dmp	UPX
behavioral2/memory/4696-18-0x0000000010000000-0x0000000010033000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
5328	dmlwifawv.exe

Executes dropped EXE 2 IoCs

pid	Process
5328	dmlwifawv.exe
4696	cyg.exe

Loads dropped DLL 1 IoCs

pid	Process
4696	cyg.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-1-5-21-461973139-3212354679-1508698038-1000\Software\Microsoft\Windows\CurrentVersion\Run\VIEW = "c:\\Program Files\\prwrq\\cyg.exe \"c:\\Program Files\\prwrq\\cyggm.dll\",Viewer"	cyg.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)	\??\a:	cyg.exe
File opened (read-only)	\??\d:	cyg.exe
File opened (read-only)	\??\n:	cyg.exe
File opened (read-only)	\??\w:	cyg.exe
File opened (read-only)	\??\k:	cyg.exe
File opened (read-only)	\??\l:	cyg.exe
File opened (read-only)	\??\u:	cyg.exe
File opened (read-only)	\??\x:	cyg.exe
File opened (read-only)	\??\g:	cyg.exe
File opened (read-only)	\??\h:	cyg.exe
File opened (read-only)	\??\j:	cyg.exe
File opened (read-only)	\??\m:	cyg.exe
File opened (read-only)	\??\o:	cyg.exe
File opened (read-only)	\??\s:	cyg.exe
File opened (read-only)	\??\b:	cyg.exe
File opened (read-only)	\??\i:	cyg.exe
File opened (read-only)	\??\q:	cyg.exe
File opened (read-only)	\??\r:	cyg.exe
File opened (read-only)	\??\t:	cyg.exe
File opened (read-only)	\??\v:	cyg.exe
File opened (read-only)	\??\y:	cyg.exe
File opened (read-only)	\??\z:	cyg.exe
File opened (read-only)	\??\p:	cyg.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	cyg.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\prwrq	dmlwifawv.exe
File created	\??\c:\Program Files\prwrq\cyggm.dll	dmlwifawv.exe
File created	\??\c:\Program Files\prwrq\cyg.exe	dmlwifawv.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
3384	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	2026-09-20_e445be2d24c9a52634e1cd5b17c7ae00_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	dmlwifawv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cyg.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
3384	cmd.exe
5552	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	cyg.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	cyg.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
5552	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4696	cyg.exe
4696	cyg.exe
4696	cyg.exe
4696	cyg.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4696	cyg.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4872	2026-09-20_e445be2d24c9a52634e1cd5b17c7ae00_coinminer_elex_wannacry.exe
5328	dmlwifawv.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4872 wrote to memory of 3384	4872	2026-09-20_e445be2d24c9a52634e1cd5b17c7ae00_coinminer_elex_wannacry.exe	89
PID 3384 wrote to memory of 5552	3384	cmd.exe	91
PID 3384 wrote to memory of 5328	3384	cmd.exe	92
PID 5328 wrote to memory of 4696	5328	dmlwifawv.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-09-20_e445be2d24c9a52634e1cd5b17c7ae00_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-20_e445be2d24c9a52634e1cd5b17c7ae00_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4872
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\dmlwifawv.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-20_e445be2d24c9a52634e1cd5b17c7ae00_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:3384
- - 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:5552
- - C:\Users\Admin\AppData\Local\Temp\dmlwifawv.exe
    C:\Users\Admin\AppData\Local\Temp\\dmlwifawv.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-20_e445be2d24c9a52634e1cd5b17c7ae00_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:5328
  - - \??\c:\Program Files\prwrq\cyg.exe
      "c:\Program Files\prwrq\cyg.exe" "c:\Program Files\prwrq\cyggm.dll",Viewer C:\Users\Admin\AppData\Local\Temp\dmlwifawv.exe
      4⤵
      Executes dropped EXE
      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:4696

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

cyg.exe

Path C:\Program Files\prwrq\cyg.exe
Size 51KB
SHA256 ce6bb7eddc83762c708d4a41709ae00371dbdc09b2a380f28fa60b1edf917473
MD5 2e068ce2770fde8d1af4cb114b98df1f
SHA1 b6f9c2775babb025b22f915c3047aa627d07c312
SHA512 998d695eb56375e63df7db16740b89deb2cf630ccbead8bcf84a921ec6f4a4f9aef2755b703f7190f332b2008ebcc949363bcf8f392d7d07246c255b5073ed35
SSDEEP 1536:6G9yoVEpHP29I3fbcJboSUge5N+CnC/maz9Rh:8pv2mbcJboce58wvOR
TLSH
T137336C236A0A49B3DFE231780A9D7232526DD862075541F7A61057EAFD243E2EE743CF
MD5 SHA1 SHA512 SSDEEP TLSH

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dmlwifawv.exe

Path C:\Users\Admin\AppData\Local\Temp\dmlwifawv.exe
Size 404KB
SHA256 411014925fcc8b39fded929882aa409cf07e427d80fdbfb67042113f2c86f3b9
MD5 8804a0fd5c5b187827cc828df229a3c4
SHA1 d7bc345e4c70ca4ea72c6d9cd649e5aee1793add
SHA512 b9bb4aa15b32b28cbfb91ca186ed00083c2ce03d1cfdf1adf341278378736f4f691a6d0b50b86ff104227518226ff8c8e1a42be290c7bd8104b42fc08d246d58
SSDEEP 12288:zdDU6g13sJd1fm/+yb3O2js82ydU/DdKumH:zdE3sJd1fm/+yb3OYs84/JH6
TLSH
T18E94AF01E68741D6DE8225B081FA7376B378DA4D0F12C7E3BB68EE2F6E211D1953B119
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

cyggm.dll

Path \??\c:\Program Files\prwrq\cyggm.dll
Size 89KB
SHA256 92393c8b11ff3a559ec7544e5892858b976f2e524f9c7b7f0f053a2811c07242
MD5 fbd71d46d8c2105a4303b4676ab2cb3e
SHA1 27f010b45b1e7d2787de5b0c124508e8de09ce06
SHA512 e8abd8c9fe859174988fa6d40fd15eb223c560515b28eb40a21c5d5c1be44a420c9af675d54452f043f279dd7a1647ae294850ca1e1396be973f59c3292b4b18
SSDEEP 1536:XHXqO6ZG03eyenOj9lgA/PObuTMT5NMCfL7ojaZf5aZlBlG6:M1uF6Feu2NlQOBcG6
TLSH
T1599302C45665CE8BCCD87072327FAA4EE631D4CCB941ACB34B5E13A71A366E3D05A705
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/4696-10-0x0000000010000000-0x0000000010033000-memory.dmp

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memory/4696-11-0x0000000010000000-0x0000000010033000-memory.dmp

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memory/4696-13-0x0000000010000000-0x0000000010033000-memory.dmp

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memory/4696-18-0x0000000010000000-0x0000000010033000-memory.dmp

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memory/4872-0-0x0000000000400000-0x0000000000471000-memory.dmp

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memory/4872-2-0x0000000000400000-0x0000000000471000-memory.dmp

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memory/5328-7-0x0000000000400000-0x0000000000471000-memory.dmp

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