farfli | dc78efaf6ca8b2e830b32d35376b43b127aec5387e24d9fdf7ed51ca02afd1dd

Analysis

max time kernel
149s
max time network
135s
platform
windows11-21h2_x64
resource
win11-20260513-en
resource tags

arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
23/05/2026, 10:17

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General

Target
2026-05-23_cd8081fe8d64572b779ad41b945ebb2a_coinminer_elex_wannacry.exe
Size 152KB
Sample260523-mbf6faav7v
SHA256 dc78efaf6ca8b2e830b32d35376b43b127aec5387e24d9fdf7ed51ca02afd1dd
MD5 cd8081fe8d64572b779ad41b945ebb2a
SHA1 09be55361cebcf204e0827329795e324f1b6ed5a
SHA512 0136340b66ba01d11afe242a3684e405ff1450d762a879d2c09d9fa27c9845541415388c06748bc769c3476d7bb6ec87ce1613a4cdb349cc66abb0e52c9e478d
SSDEEP 1536:B3aacz2htqkUla/NGVcJ/gAqcX0JMseuiGSeNVvDi0tMuUJJny3GM+9qKvMg:Ua/qc9rqzMseNoVv9EJFnM8qKvMg
TLSH
T134E3270263F6C198F0B31E30DA7646F08B66BC69FA70921B13847E4EBD31A15ED21776
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery farfli persistence spyware stealer upx

Malware Config

Signatures

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

Detects Farfli Backdoor 3 IoCs

resource	yara_rule
behavioral2/memory/4044-11-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli
behavioral2/memory/4044-13-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli
behavioral2/memory/4044-12-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 1 IoCs

resource	yara_rule
behavioral2/memory/4044-12-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3576-0-0x0000000000400000-0x0000000000423000-memory.dmp	UPX
behavioral2/memory/3576-2-0x0000000000400000-0x0000000000423000-memory.dmp	UPX
behavioral2/files/0x001d00000002b1f0-4.dat	UPX
behavioral2/memory/2588-7-0x0000000000400000-0x0000000000423000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
1	4044	rundll32.exe
3	4044	rundll32.exe
4	4044	rundll32.exe
5	4044	rundll32.exe
6	4044	rundll32.exe
7	4044	rundll32.exe
8	4044	rundll32.exe
12	4044	rundll32.exe

Deletes itself 1 IoCs

pid	Process
2588	jcvode.exe

Executes dropped EXE 1 IoCs

pid	Process
2588	jcvode.exe

Loads dropped DLL 1 IoCs

pid	Process
4044	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-1-5-21-1636999435-3883760687-346127294-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\hzfab\\eljyk.dll\",init"	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)	\??\y:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\h:	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)	\??\z:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	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/3576-0-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral2/memory/3576-2-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral2/files/0x001d00000002b1f0-4.dat	upx
behavioral2/memory/2588-7-0x0000000000400000-0x0000000000423000-memory.dmp	upx

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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jcvode.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-05-23_cd8081fe8d64572b779ad41b945ebb2a_coinminer_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
3792	cmd.exe
844	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
844	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4044	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3576	2026-05-23_cd8081fe8d64572b779ad41b945ebb2a_coinminer_elex_wannacry.exe
2588	jcvode.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3576 wrote to memory of 3792	3576	2026-05-23_cd8081fe8d64572b779ad41b945ebb2a_coinminer_elex_wannacry.exe	80
PID 3792 wrote to memory of 844	3792	cmd.exe	82
PID 3792 wrote to memory of 2588	3792	cmd.exe	83
PID 2588 wrote to memory of 4044	2588	jcvode.exe	84

C:\Users\Admin\AppData\Local\Temp\2026-05-23_cd8081fe8d64572b779ad41b945ebb2a_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-23_cd8081fe8d64572b779ad41b945ebb2a_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3576
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\jcvode.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-23_cd8081fe8d64572b779ad41b945ebb2a_coinminer_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3792
- - 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:844
- - \??\c:\jcvode.exe
    c:\jcvode.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-23_cd8081fe8d64572b779ad41b945ebb2a_coinminer_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2588
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\hzfab\eljyk.dll",init c:\jcvode.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:4044

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

jcvode.exe

Path C:\jcvode.exe
Size 152KB
SHA256 c3f65dec60b2f1ffa5199faf4d29c6863cd882357c45bcdf7487d064daf6b061
MD5 252ef5d4108258a48f64d286270960c8
SHA1 953c011e66062ce3adca383adfca4a0597e6e074
SHA512 2dfd764cd1dda32c0321017e8b32107bfc0a5c5163ade83598649fbc91f990c0005927bbd82c252b97a5b2747d6e5381306b7f6c9e1b8aecfd31bcd198de707f
SSDEEP 1536:B3aacz2htqkUla/NGVcJ/gAqcX0JMseuiGSeNVvDi0tMuUJJny3GM+9qKvMg:Ua/qc9rqzMseNoVv9EJFnM8qKvMg
TLSH
T13BE3270267F6C198F0B31E30DA7646F04B66BC69FA70921B13847E4EBD31A15ED217B6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

eljyk.dll

Path \??\c:\hzfab\eljyk.dll
Size 50KB
SHA256 a632527bcd457c9a4cfce83e7a9a675baff790b0279de5d8ea3192dfb2dd888a
MD5 ab32c5bfd7ecfbe9ed733dfb81210933
SHA1 4d5c6e7a0031691f12e78b096ff928b0d55bdfab
SHA512 59b971146292074d76d23d5f26889108f4d6e33804332449f4c589bf8a8d53e37ac8dfea47e9d3c5ae0f382ae1acf25c4968bea87b3f5ff9d51f2274229c1ab5
SSDEEP 1536:mrrG57ZqLLpf+Xz+HOtygmRnO/x5Rq8Gm:mwKGqutWM/x281
TLSH
T12033F1F4EFB4E067ECBA5F743E6A6215DA727B10C63188EA518090135F335CACA18717
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2588-7-0x0000000000400000-0x0000000000423000-memory.dmp

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memory/3576-0-0x0000000000400000-0x0000000000423000-memory.dmp

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memory/3576-2-0x0000000000400000-0x0000000000423000-memory.dmp

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memory/4044-10-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/4044-11-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/4044-13-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/4044-12-0x0000000010000000-0x0000000010032000-memory.dmp

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