farfli | 337985b847626463d3ab970ff0bab0f6c33bc1de043a1be1a95b1462191be17b

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
25/04/2026, 04:16

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General

Target
2026-04-25_841077f9937682819bd30489776c5b17_elex_wannacry.exe
Size 213KB
Sample260425-ev6lfae19y
SHA256 337985b847626463d3ab970ff0bab0f6c33bc1de043a1be1a95b1462191be17b
MD5 841077f9937682819bd30489776c5b17
SHA1 88440af2a7c826eaa935efda2e9d1a95b2b0fea6
SHA512 516d5fff34f9da1592f4e7804feeb6fa8818569e670cd8d8b6660b56fa9cc638150ee7ede136122a74156e0f3a17d2fa1b2ea98354092aeee66718789aad49eb
SSDEEP 3072:TfwwHEzrV5x5tMBql0RZ4FjCDnO8XjDDQuMHNbwDXkLh16oVHe:zwgErtcql+ZHn1PDQfwDXkN1Z
TLSH
T14B24F11B3A8189AFF00BFB7A9746F4C79BD160683F40762F034C65AE5B213CAC59516E
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery farfli persistence spyware stealer

Malware Config

Signatures

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

Detects Farfli Backdoor 2 IoCs

resource	yara_rule
behavioral1/memory/5128-12-0x0000000010000000-0x000000001006A000-memory.dmp	family_farfli
behavioral1/memory/5128-14-0x0000000010000000-0x000000001006A000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral1/memory/5128-12-0x0000000010000000-0x000000001006A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/5128-14-0x0000000010000000-0x000000001006A000-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
7	5128	rundll32.exe
14	5128	rundll32.exe
15	5128	rundll32.exe
16	5128	rundll32.exe
29	5128	rundll32.exe
35	5128	rundll32.exe
39	5128	rundll32.exe
49	5128	rundll32.exe

Deletes itself 1 IoCs

pid	Process
2224	duruggyzv.exe

Executes dropped EXE 1 IoCs

pid	Process
2224	duruggyzv.exe

Loads dropped DLL 1 IoCs

pid	Process
5128	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-1-5-21-1609746302-1884177235-1125644204-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Dotx = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\mubvq\\bhhbblljc.dll\",encore"	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)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\p:	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)	\??\i:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\w:	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

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
5128	rundll32.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\mubvq	duruggyzv.exe
File created	\??\c:\Program Files\mubvq\bhhbblljc.dll	duruggyzv.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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-25_841077f9937682819bd30489776c5b17_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	duruggyzv.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
4592	cmd.exe
4400	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
4400	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe
5128	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5128	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3204	2026-04-25_841077f9937682819bd30489776c5b17_elex_wannacry.exe
2224	duruggyzv.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3204 wrote to memory of 4592	3204	2026-04-25_841077f9937682819bd30489776c5b17_elex_wannacry.exe	84
PID 4592 wrote to memory of 4400	4592	cmd.exe	86
PID 4592 wrote to memory of 2224	4592	cmd.exe	87
PID 2224 wrote to memory of 5128	2224	duruggyzv.exe	88

C:\Users\Admin\AppData\Local\Temp\2026-04-25_841077f9937682819bd30489776c5b17_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-25_841077f9937682819bd30489776c5b17_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3204
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\duruggyzv.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-25_841077f9937682819bd30489776c5b17_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4592
- - 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:4400
- - C:\Users\Admin\AppData\Local\Temp\duruggyzv.exe
    C:\Users\Admin\AppData\Local\Temp\\duruggyzv.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-25_841077f9937682819bd30489776c5b17_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:2224
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\mubvq\bhhbblljc.dll",encore C:\Users\Admin\AppData\Local\Temp\duruggyzv.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)
      Suspicious use of NtSetInformationThreadHideFromDebugger
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:5128

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

duruggyzv.exe

Path C:\Users\Admin\AppData\Local\Temp\duruggyzv.exe
Size 213KB
SHA256 24fab13cb69f5c2eef0c3309e9fdec9e17ce22766fe974a2ccdeb4174236450f
MD5 2515bd054a38b9472ff6064efb5db2a5
SHA1 1f780f3dd5c17d2ac193b9ddb1a6a8ae6ecd12c0
SHA512 e393e56abeebd1a250e6a86069dc282ce084f19d146c0f91c3e087ab4c9a017744b6674462371f1f9e40386f788b4448e2369a8aa1b24b16e76df6edcbede962
SSDEEP 3072:TfwwHEzrV5x5tMBql0RZ4FjCDnO8XjDDQuMHNbwDXkLh16oVHe+:zwgErtcql+ZHn1PDQfwDXkN1ZT
TLSH
T1EF24F11B3A8189AFF00BFB7A9746F4C79BD160683F40762F034C65AE5B213CAC59516E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

bhhbblljc.dll

Path \??\c:\Program Files\mubvq\bhhbblljc.dll
Size 168KB
SHA256 f097a6a1ea575b3171abca1d86a8bcf0ea11d77ee6084a3b6eb7f929e7ca72fc
MD5 c51100141f2c9f918de2633605447b9c
SHA1 a73df394cd30b76ec68cbf7d5651b2f35e1b53f7
SHA512 a0482dd64c9fc4a120423f5cce7f56290ebc2ada77cbe43b6f324d34cfb99727261a96b99964710918409c150fbdf2a69707928785f9cc23d45a77c82a2a9f18
SSDEEP 3072:pH7O5yt++RbfRugmVWo4GYessewQpCpxGWUJtff+gVBLpBuyCjAyFzuJ:pbay5fR5eOrixfYtff+g7LpBVCjAJ
TLSH
T19AF3E133F78247BAE0890375151BEC7FBC20A690837E8E2792CF519A2F156E56D5C3A1
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2224-7-0x0000000000400000-0x0000000000436000-memory.dmp

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memory/3204-0-0x0000000000400000-0x0000000000436000-memory.dmp

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memory/3204-2-0x0000000000400000-0x0000000000436000-memory.dmp

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memory/5128-10-0x0000000010000000-0x000000001006A000-memory.dmp

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memory/5128-11-0x0000000010052000-0x0000000010053000-memory.dmp

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memory/5128-12-0x0000000010000000-0x000000001006A000-memory.dmp

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memory/5128-14-0x0000000010000000-0x000000001006A000-memory.dmp

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memory/5128-15-0x0000000000160000-0x000000000019B000-memory.dmp

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