farfli | dae7d44157bace1e4b621274049bfc39383e992258ab1a0ea10b3ac38dc8e130

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
03/08/2026, 08:54

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General

Target
2026-08-03_bf17b5cd64a4019b00ec63e39922eb57_elex_wannacry.exe
Size 86KB
Sample260803-kvbnyser21
SHA256 dae7d44157bace1e4b621274049bfc39383e992258ab1a0ea10b3ac38dc8e130
MD5 bf17b5cd64a4019b00ec63e39922eb57
SHA1 415f828c5bb278a0cdf1ae27a8470ebc1dbf19d1
SHA512 011ac4b4245210897605c7f2c9b4b7244d1286afe6a511ac08d265b9392a6fdab225402561e8b43fdfa37f2275a8a367db2a5e34512ddcba801a71ee9affc134
SSDEEP 1536:m/14ZaKO/myxZmAijMcCwVVydoM1bKAQAH9M53e+iWtnSdF:a14ZaKOTZSMcJVgDKxAH9MhtfSdF
TLSH
T1D883CF232FBB4175DD44AFB11E6B2665E6F2BD36212082728B5C9D8DAA3CF45DB0131C
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 3 IoCs

resource	yara_rule
behavioral1/memory/5108-12-0x0000000010000000-0x0000000010021000-memory.dmp	family_farfli
behavioral1/memory/5108-15-0x0000000010000000-0x0000000010021000-memory.dmp	family_farfli
behavioral1/memory/5108-16-0x0000000010000000-0x0000000010021000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral1/memory/5108-12-0x0000000010000000-0x0000000010021000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/5108-15-0x0000000010000000-0x0000000010021000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/5108-16-0x0000000010000000-0x0000000010021000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
15	5108	rundll32.exe
16	5108	rundll32.exe
17	5108	rundll32.exe
38	5108	rundll32.exe
52	5108	rundll32.exe
61	5108	rundll32.exe
75	5108	rundll32.exe
81	5108	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4528	vlfmn.exe

Executes dropped EXE 1 IoCs

pid	Process
4528	vlfmn.exe

Loads dropped DLL 1 IoCs

pid	Process
5108	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-1-5-21-1788976790-1541110888-1636651838-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\mlzrl\\veczn.dll\",GetWindowClass"	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)	\??\n:	rundll32.exe
File opened (read-only)	\??\r:	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)	\??\b:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\j:	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)	\??\w:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	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

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
2236	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	2026-08-03_bf17b5cd64a4019b00ec63e39922eb57_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	vlfmn.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
2236	cmd.exe
4816	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
4816	PING.EXE

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
5108	rundll32.exe
5108	rundll32.exe
5108	rundll32.exe
5108	rundll32.exe
5108	rundll32.exe
5108	rundll32.exe
5108	rundll32.exe
5108	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5108	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3816	2026-08-03_bf17b5cd64a4019b00ec63e39922eb57_elex_wannacry.exe
4528	vlfmn.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3816 wrote to memory of 2236	3816	2026-08-03_bf17b5cd64a4019b00ec63e39922eb57_elex_wannacry.exe	84
PID 2236 wrote to memory of 4816	2236	cmd.exe	86
PID 2236 wrote to memory of 4528	2236	cmd.exe	87
PID 4528 wrote to memory of 5108	4528	vlfmn.exe	88

C:\Users\Admin\AppData\Local\Temp\2026-08-03_bf17b5cd64a4019b00ec63e39922eb57_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-03_bf17b5cd64a4019b00ec63e39922eb57_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3816
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\vlfmn.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-03_bf17b5cd64a4019b00ec63e39922eb57_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:2236
- - 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:4816
- - \??\c:\vlfmn.exe
    c:\vlfmn.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-03_bf17b5cd64a4019b00ec63e39922eb57_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4528
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\mlzrl\veczn.dll",GetWindowClass c:\vlfmn.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:5108

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

vlfmn.exe

Path C:\vlfmn.exe
Size 86KB
SHA256 cb4708ddf5383733b15609bc70524588712472b900bad441258a8a792d2d9ea7
MD5 91186c0ace54c857de9c064b6d1a6c80
SHA1 1b99cab584fef44d4a3eb56ef5eecb497e59a67a
SHA512 340e27bdbfa3bcf455f238aab7c4ecd0cdb9ba2e47860c8da6c608ab25685751b3a7e4409ff2e48e9ad81fdffed75244957092bd75a23f61b6f5f3a83e3e73e3
SSDEEP 1536:m/14ZaKO/myxZmAijMcCwVVydoM1bKAQAH9M53e+iWtnSdn:a14ZaKOTZSMcJVgDKxAH9MhtfSdn
TLSH
T15293BF232FBB4175DD44AFB11F6B1665E6F2BD36212082728B5CA98DAA3CF45DB0131C
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

veczn.dll

Path \??\c:\mlzrl\veczn.dll
Size 43KB
SHA256 0b747c32730f2ad29b44299054bc22f8075702b081e91edaaead528abca227d2
MD5 0164aeb78f4d2181e817a9a6b0ad22f1
SHA1 c56c6a743e48e8652707a34e4cddc1f645f140ea
SHA512 e69ad90790d8062a903954f7ea85cacd241113afaf0eb16098f473835cffcda6e1f9fa9844a8618cc297fffa2e6ff7d458f9ebb2ce3febf7ffd683ffd6ad44f5
SSDEEP 768:2DdBa8mqIOiSUZrBGhvQLq6UYiaKRsRMwwY2BjkTrXW/VJZ581swUqHhiQREQoJs:kwqnPUb+v0q6UY+sRMwwY2Jkal+1ZUqJ
TLSH
T19613F133EACCDFDFF8A05271C576D0FCD337AC2849669A0395A0219D9D60948B878F66
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3816-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3816-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4528-7-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/5108-10-0x0000000010000000-0x0000000010021000-memory.dmp

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memory/5108-11-0x0000000001110000-0x0000000001112000-memory.dmp

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memory/5108-12-0x0000000010000000-0x0000000010021000-memory.dmp

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memory/5108-13-0x0000000001110000-0x0000000001112000-memory.dmp

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memory/5108-15-0x0000000010000000-0x0000000010021000-memory.dmp

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memory/5108-16-0x0000000010000000-0x0000000010021000-memory.dmp

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