farfli | 846a642b162bbb6f1db6deee54466f9fd0c23a41d5171ad2f4dbac96bb7b0de0

General

Target
2026-04-21_ff409d0d34a0165b3ed9b09170d0bae4_coinminer_elex_wannacry.exe
Size 409KB
Sample260421-2nhmcsds8q
SHA256 846a642b162bbb6f1db6deee54466f9fd0c23a41d5171ad2f4dbac96bb7b0de0
MD5 ff409d0d34a0165b3ed9b09170d0bae4
SHA1 e27a031512576393877d4531d914d79bcbbcc0f4
SHA512 dd7f800d405d180fad82098d12b87a1126bbb09ec6fc17b09dd1cf9c0185464fb43aa7d2d5a8734bb4ab5d882eb6a9f6b940d92f987a8c141be3455c41a14685
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6LS:jGmTju+mMC4ITJE8dfSJ/F6
TLSH
T11E94D02272C08BA3C1866432CDA6EA7CD3E5CD689C705E3773E9F65EDD36941423A274
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 3 IoCs

resource	yara_rule
behavioral1/memory/3032-7-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral1/memory/3032-9-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral1/memory/3032-11-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral1/memory/3032-7-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/3032-9-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/3032-11-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 1 IoCs

resource	yara_rule
behavioral1/files/0x009800000001b598-3.dat	UPX

Badlisted process makes network request 4 IoCs

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

flow	pid	Process
9	3032	rundll32.exe
14	3032	rundll32.exe
13	3032	rundll32.exe
35	3032	rundll32.exe

Deletes itself 1 IoCs

pid	Process
3156	ybmlm.exe

Executes dropped EXE 1 IoCs

pid	Process
3156	ybmlm.exe

Loads dropped DLL 1 IoCs

pid	Process
3032	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-1-5-21-2714754311-527593155-1440850301-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\D3D = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\pykki\\coxkb.dll\",InitEngine"	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)	\??\q:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\n:	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

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\pykki	ybmlm.exe
File created	\??\c:\Program Files\pykki\coxkb.dll	ybmlm.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	2026-04-21_ff409d0d34a0165b3ed9b09170d0bae4_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	ybmlm.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
5080	cmd.exe
2024	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
2024	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3032	rundll32.exe
3032	rundll32.exe
3032	rundll32.exe
3032	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3032	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5104	2026-04-21_ff409d0d34a0165b3ed9b09170d0bae4_coinminer_elex_wannacry.exe
3156	ybmlm.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5104 wrote to memory of 5080	5104	2026-04-21_ff409d0d34a0165b3ed9b09170d0bae4_coinminer_elex_wannacry.exe	84
PID 5080 wrote to memory of 2024	5080	cmd.exe	86
PID 5080 wrote to memory of 3156	5080	cmd.exe	87
PID 3156 wrote to memory of 3032	3156	ybmlm.exe	88

C:\Users\Admin\AppData\Local\Temp\2026-04-21_ff409d0d34a0165b3ed9b09170d0bae4_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-21_ff409d0d34a0165b3ed9b09170d0bae4_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5104
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\ybmlm.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-21_ff409d0d34a0165b3ed9b09170d0bae4_coinminer_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:5080
- - 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:2024
- - C:\Users\Admin\AppData\Local\Temp\ybmlm.exe
    C:\Users\Admin\AppData\Local\Temp\\ybmlm.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-21_ff409d0d34a0165b3ed9b09170d0bae4_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:3156
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\pykki\coxkb.dll",InitEngine C:\Users\Admin\AppData\Local\Temp\ybmlm.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:3032

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Peripheral Device Discovery

Query Registry

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

coxkb.dll

Path C:\Program Files\pykki\coxkb.dll
Size 176KB
SHA256 eb833f608fe0b0cbb6c2fbbd30a666618516b6e7f28a2bb7b15cd897bd4c8b33
MD5 f5de30230dd4cb4c75aae10c3773ec24
SHA1 2536deec6e190a950cda3ebdefadf605f4786a10
SHA512 ec7ecde0a990126779efb03ab88da939ce07674ba23126fa58d365f8f5e19bfded732424e6eba41e718735ab82405afce5f734c2124ed380156289c5119a4e1e
SSDEEP 3072:KiDJQVl82dm+NBiPAaHDb0gL/CyGbEPVMnY0RVjatbmKb6DWSFoocF:1Jv2tOItshGYdMnYYVjasKbOWSFofF
TLSH
T18D041261866D1C34D087B7717B05920DF6B453A490B9CB93F7B8AF2B3D12AEA805E353
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ybmlm.exe

Path C:\Users\Admin\AppData\Local\Temp\ybmlm.exe
Size 409KB
SHA256 2cecd94fa5559c88b0aa8950d882beb01bbd4bedf17a9b50e7fbc2fba754f090
MD5 52cd542d99fca7f4214433963afda2b0
SHA1 37b3fbf38dc6825f88dc02e90d4f96a1a7edab90
SHA512 cebbd4dfb1edbe9465071441cfd0a2e6a5deae7673e18da6dd238efeda2ec4b6fcb40bab3be2407960f70c500c535559947b9f596a603b43982807af2ad10235
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6LSn:jGmTju+mMC4ITJE8dfSJ/F6E
TLSH
T1AD94D02272D08BA3C1866432CDA6EA7CD3E5CD689C305E3773E9F65EDD36941423A274
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3032-7-0x0000000010000000-0x0000000010067000-memory.dmp

Download

memory/3032-9-0x0000000010000000-0x0000000010067000-memory.dmp

Download

memory/3032-8-0x000000001005A000-0x000000001005B000-memory.dmp

Download

memory/3032-11-0x0000000010000000-0x0000000010067000-memory.dmp

Download

memory/3032-12-0x0000000000D40000-0x0000000000D59000-memory.dmp

Download

memory/3032-13-0x0000000000E30000-0x0000000000E49000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads