farfli | 337985b847626463d3ab970ff0bab0f6c33bc1de043a1be1a95b1462191be17b

Analysis

max time kernel
149s
max time network
149s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-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
behavioral2/memory/5116-12-0x0000000010000000-0x000000001006A000-memory.dmp	family_farfli
behavioral2/memory/5116-14-0x0000000010000000-0x000000001006A000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/5116-12-0x0000000010000000-0x000000001006A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5116-14-0x0000000010000000-0x000000001006A000-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
1	5116	rundll32.exe
2	5116	rundll32.exe
3	5116	rundll32.exe
4	5116	rundll32.exe
6	5116	rundll32.exe
7	5116	rundll32.exe
8	5116	rundll32.exe
12	5116	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4312	ajhjgow.exe

Executes dropped EXE 1 IoCs

pid	Process
4312	ajhjgow.exe

Loads dropped DLL 1 IoCs

pid	Process
5116	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-1-5-21-2397528088-2630719772-1129911217-1000\Software\Microsoft\Windows\CurrentVersion\Run\Dotx = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\wxfxnmd\\slszvy.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)	\??\e:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	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)	\??\r:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\o:	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)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	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

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
5116	rundll32.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	\??\c:\Program Files\wxfxnmd\slszvy.dll	ajhjgow.exe
File opened for modification	\??\c:\Program Files\wxfxnmd	ajhjgow.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	ajhjgow.exe
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

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
440	cmd.exe
4376	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
4376	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe
5116	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5116	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1776	2026-04-25_841077f9937682819bd30489776c5b17_elex_wannacry.exe
4312	ajhjgow.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1776 wrote to memory of 440	1776	2026-04-25_841077f9937682819bd30489776c5b17_elex_wannacry.exe	79
PID 440 wrote to memory of 4376	440	cmd.exe	81
PID 440 wrote to memory of 4312	440	cmd.exe	82
PID 4312 wrote to memory of 5116	4312	ajhjgow.exe	83

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:1776
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\ajhjgow.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:440
- - 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:4376
- - C:\Users\Admin\AppData\Local\Temp\ajhjgow.exe
    C:\Users\Admin\AppData\Local\Temp\\ajhjgow.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:4312
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\wxfxnmd\slszvy.dll",encore C:\Users\Admin\AppData\Local\Temp\ajhjgow.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:5116

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

ajhjgow.exe

Path C:\Users\Admin\AppData\Local\Temp\ajhjgow.exe
Size 213KB
SHA256 530d0aa983b5bf04b327b62532f8dc57ae7c6dfc1330e3522cb8629581ceed2b
MD5 3a72119f37b1bf9a0fbf678a40f4b6f4
SHA1 6a86bede8e4bd808ddcfbb82f3a0a391eb9a8107
SHA512 6c68266623136d059d86cfef3c0303aa1da67c2ce59a09c5e75fc8bce5e22e260cba5f257954b5c2e4c9f406902bcea95efcd31b0f16253c1ad315e23a6f0e6b
SSDEEP 3072:TfwwHEzrV5x5tMBql0RZ4FjCDnO8XjDDQuMHNbwDXkLh16oVHe/:zwgErtcql+ZHn1PDQfwDXkN1ZE
TLSH
T12124F11B3A8189AFF00BFB7A9746F0C79BD160283F40762F034C65AE5B217CAC59516E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

slszvy.dll

Path \??\c:\Program Files\wxfxnmd\slszvy.dll
Size 168KB
SHA256 a633dd25b1bcffeaaf945ef66f22f758a2c716dd9d66cb1608779daedd9d5336
MD5 5b73207f15e42723562c6d66450328ef
SHA1 04a4e2ec44ce1ecd2f5bff8018ac91b9916649c6
SHA512 acce2c175864f005fb1adc2ce7b90429698e5e9cb0419fda56c57962982dbf545898fdd79072eddcc45c1e817c414351bf2b1c9be15f71d7498fe2008d2b65b3
SSDEEP 3072:pH7O5yt++RbfRugmVWo4GYessewQpCpxGWUJtff+gVBLpBuyCjAyFzuY:pbay5fR5eOrixfYtff+g7LpBVCjAY
TLSH
T10BF3E133F78247BAE0890375151BEC7FBC20A690833E8E2792CF519A2F156E56D5C3A1
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1776-0-0x0000000000400000-0x0000000000436000-memory.dmp

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memory/1776-2-0x0000000000400000-0x0000000000436000-memory.dmp

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memory/4312-7-0x0000000000400000-0x0000000000436000-memory.dmp

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memory/5116-10-0x0000000010000000-0x000000001006A000-memory.dmp

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memory/5116-11-0x0000000010052000-0x0000000010053000-memory.dmp

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memory/5116-12-0x0000000010000000-0x000000001006A000-memory.dmp

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memory/5116-14-0x0000000010000000-0x000000001006A000-memory.dmp

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