farfli | dc6761377a3ac7c05789cf07bd721dc4ed13d6df78897a65b8f4a7a3f0d05480

Analysis

max time kernel
148s
max time network
141s
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, 23:07

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General

Target
2026-08-19_2fde6d4c879c7a710530ddffdf045905_coinminer_elex_wannacry.exe
Size 311KB
Sample260819-237vssvgrb
SHA256 dc6761377a3ac7c05789cf07bd721dc4ed13d6df78897a65b8f4a7a3f0d05480
MD5 2fde6d4c879c7a710530ddffdf045905
SHA1 023b1a12b665b371e6c3652c8320e68cf341cf87
SHA512 7be69b425ff18bb4d9ad79a7ae82f143cc8cec24628aa117fb32107936a359d6e048d125b1499d5a0ffe5d81a51ed9c1850889256a57a8e380dc848e0a28a195
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrOg:ywLcCmuErglr73aAD+v
TLSH
T1DD64F142D511CF47FC2FCAB6823E1E355317AE553B205693D3C8BA1F65B2B42A63A0D8
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/4472-12-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/4472-10-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/4472-15-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/4472-17-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/4472-18-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/4472-19-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/4472-22-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 7 IoCs

resource	yara_rule
behavioral2/memory/4472-12-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4472-10-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4472-15-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4472-17-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4472-18-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4472-19-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4472-22-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4456-0-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral2/memory/4456-2-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral2/files/0x000e00000001b1d0-3.dat	UPX
behavioral2/memory/3492-6-0x0000000000400000-0x0000000000483000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
5	4472	rundll32.exe
10	4472	rundll32.exe
11	4472	rundll32.exe
12	4472	rundll32.exe
13	4472	rundll32.exe
14	4472	rundll32.exe
17	4472	rundll32.exe
18	4472	rundll32.exe

Deletes itself 1 IoCs

pid	Process
3492	drnfm.exe

Executes dropped EXE 1 IoCs

pid	Process
3492	drnfm.exe

Loads dropped DLL 1 IoCs

pid	Process
4472	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-1-5-21-1738198120-2966725515-3980530802-1000\Software\Microsoft\Windows\CurrentVersion\Run\Wetor = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\wdxmvg\\solwrr.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)	\??\b:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\a:	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/4456-0-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral2/memory/4456-2-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral2/files/0x000e00000001b1d0-3.dat	upx
behavioral2/memory/3492-6-0x0000000000400000-0x0000000000483000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\wdxmvg	drnfm.exe
File created	\??\c:\Program Files\wdxmvg\solwrr.dll	drnfm.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
2532	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	2026-08-19_2fde6d4c879c7a710530ddffdf045905_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	drnfm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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
2532	cmd.exe
2848	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
2848	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4472	rundll32.exe
4472	rundll32.exe
4472	rundll32.exe
4472	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4472	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4456	2026-08-19_2fde6d4c879c7a710530ddffdf045905_coinminer_elex_wannacry.exe
3492	drnfm.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4456 wrote to memory of 2532	4456	2026-08-19_2fde6d4c879c7a710530ddffdf045905_coinminer_elex_wannacry.exe	89
PID 2532 wrote to memory of 2848	2532	cmd.exe	91
PID 2532 wrote to memory of 3492	2532	cmd.exe	92
PID 3492 wrote to memory of 4472	3492	drnfm.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-19_2fde6d4c879c7a710530ddffdf045905_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-19_2fde6d4c879c7a710530ddffdf045905_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4456
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\drnfm.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-19_2fde6d4c879c7a710530ddffdf045905_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:2532
- - 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:2848
- - C:\Users\Admin\AppData\Local\Temp\drnfm.exe
    C:\Users\Admin\AppData\Local\Temp\\drnfm.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-19_2fde6d4c879c7a710530ddffdf045905_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:3492
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\wdxmvg\solwrr.dll",GetProc C:\Users\Admin\AppData\Local\Temp\drnfm.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:4472

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

drnfm.exe

Path C:\Users\Admin\AppData\Local\Temp\drnfm.exe
Size 311KB
SHA256 a28445c62afc851182a7cf7c2d6a021db5cdaac6b7f83e05d7d53083ab61e763
MD5 5c954cc9fe8e8a7240ab44cb4db9fd65
SHA1 dab5ef23052a6be423ceade1e6a652da4ffe6090
SHA512 9a8dfe9a2005b0a21b92678483b1b73afd6e6a73858d53b84e97640ea5acf2501326e62793bc140177c2757940f039fe4434aa280818b998192fc2f122e2a278
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrOO:ywLcCmuErglr73aAD+D
TLSH
T19164F142D511CF47FC2FCAB6823E1E355317AE553B205693D3C8BA1F65B2B42A63A0D8
MD5 SHA1 SHA512 SSDEEP TLSH

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solwrr.dll

Path \??\c:\Program Files\wdxmvg\solwrr.dll
Size 218KB
SHA256 88f5852b78a7785f383f960584c3c7b50c3b2e9d400a54baeca683e8dba92840
MD5 0969ce4a6211b61cd74545537f9eef77
SHA1 bc827737a128c0291007d4950a7a1f4624dd955a
SHA512 a01b9560a4fc3dc36bf5dd9a72ca16db3505f6f3fc407440e441573043fba311f7bbc9d9e8a576650de1a2e7b8b83f67890a033fbed1dd9484939989a67e0aa8
SSDEEP 6144:KORxNwD2VOidhzeXwddDzLi5vOQEqscr0ZTJauytU:pnNwDTi3swddDiROXIe
TLSH
T13324128BCF983873C5223379597951A0B9725290AFA1530DD2E6D34FA072BA2CF7B531
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/3492-6-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/4456-0-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/4456-2-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/4472-14-0x0000000002940000-0x0000000002941000-memory.dmp

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memory/4472-9-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4472-12-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4472-10-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4472-15-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4472-17-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4472-18-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4472-19-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4472-22-0x0000000010000000-0x0000000010058000-memory.dmp

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