farfli | 667046b47115dde046ca52ea396f5e55b076795034c90f8c820b54af3c9c15d8

General

Target
2026-08-03_40b638a927df80b86533d24324780b57_coinminer_elex_wannacry.exe
Size 415KB
Sample260803-ftj7gscd86
SHA256 667046b47115dde046ca52ea396f5e55b076795034c90f8c820b54af3c9c15d8
MD5 40b638a927df80b86533d24324780b57
SHA1 9fa38780eca930f06203526e0ad347cc927e8f5d
SHA512 3569466b3e5a80c43936cdfbc991c244836c6e90d4a172a63b845e3c65c2df21ff4e3da9057d1f6c728968aea715928f15137dfbe36e0d86145c19f2c4c242cd
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6L:jGmTju+mMC4ITJE8dfSJ/F6
TLSH
T10B94D02272D0CBA3C0856432CE66E63CD3E5CC689D705E3773E9FA5DEA36941423A275
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 2 IoCs

resource	yara_rule
behavioral2/memory/2228-8-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral2/memory/2228-10-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/2228-8-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2228-10-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 1 IoCs

resource	yara_rule
behavioral2/files/0x000600000001b85f-1.dat	UPX

Badlisted process makes network request 4 IoCs

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

flow	pid	Process
7	2228	rundll32.exe
9	2228	rundll32.exe
10	2228	rundll32.exe
12	2228	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4632	rorkf.exe

Executes dropped EXE 1 IoCs

pid	Process
4632	rorkf.exe

Loads dropped DLL 1 IoCs

pid	Process
2228	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-1-5-21-3797332335-34111092-3597280141-1000\Software\Microsoft\Windows\CurrentVersion\Run\D3D = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\psplvsvrz\\ygqgrsey.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)	\??\v:	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)	\??\j:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\k:	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)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	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 created	\??\c:\Program Files\psplvsvrz\ygqgrsey.dll	rorkf.exe
File opened for modification	\??\c:\Program Files\psplvsvrz	rorkf.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
5096	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rorkf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-03_40b638a927df80b86533d24324780b57_coinminer_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
5096	cmd.exe
4884	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
4884	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2228	rundll32.exe
2228	rundll32.exe
2228	rundll32.exe
2228	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2228	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3856	2026-08-03_40b638a927df80b86533d24324780b57_coinminer_elex_wannacry.exe
4632	rorkf.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3856 wrote to memory of 5096	3856	2026-08-03_40b638a927df80b86533d24324780b57_coinminer_elex_wannacry.exe	89
PID 5096 wrote to memory of 4884	5096	cmd.exe	91
PID 5096 wrote to memory of 4632	5096	cmd.exe	92
PID 4632 wrote to memory of 2228	4632	rorkf.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-03_40b638a927df80b86533d24324780b57_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-03_40b638a927df80b86533d24324780b57_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3856
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\rorkf.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-03_40b638a927df80b86533d24324780b57_coinminer_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:5096
- - 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:4884
- - C:\Users\Admin\AppData\Local\Temp\rorkf.exe
    C:\Users\Admin\AppData\Local\Temp\\rorkf.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-03_40b638a927df80b86533d24324780b57_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:4632
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\psplvsvrz\ygqgrsey.dll",InitEngine C:\Users\Admin\AppData\Local\Temp\rorkf.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:2228

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

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

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Downloads

rorkf.exe

Path C:\Users\Admin\AppData\Local\Temp\rorkf.exe
Size 415KB
SHA256 7c6bcf8b69367ad8f8296533037451d1ac8fe0f538ffa7c469c1c9951784da9c
MD5 dd1dc152de2489e4b360fa8a36e1b09d
SHA1 08c96b098eb6d31b99177fcab346f51603c5e54e
SHA512 671b6f7e4b9d962dbf0aedc2caf1387214f788653e483de82ccfc29dfce47de3570cad43c0a62de81e6101c8cbcf737c8c6e4e5cc0cb6040f164248f68471da9
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6LJ:jGmTju+mMC4ITJE8dfSJ/F6l
TLSH
T18B94D02272D0CBA3C0856432CE66E63CD3E5CC689D705E3773E9FA5DEA36941423A275
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ygqgrsey.dll

Path \??\c:\Program Files\psplvsvrz\ygqgrsey.dll
Size 176KB
SHA256 e56250d2954531945c2f78dcc7c3fa792cd1da116a19add0c23df4ea6a82e153
MD5 c382e4bd538732a0e05d0156da0c7603
SHA1 a9c70501a00b2f42ad978709d434bee024cda45d
SHA512 4b954281930c4db9fdf4d4b75f233c9417b7765a28b2deed5248dd94d19a172cdb2213fa7f2cf94202470c3a06d86346b86abbdd291842ff81fe60680039b07b
SSDEEP 3072:KiDJQVl82dm+NBiPAaHDb0gL/CyGbEPVMnY0RVjatbmKb6DWSFoocB:1Jv2tOItshGYdMnYYVjasKbOWSFofB
TLSH
T193041261862D1C34D087B7717B05920DF6B452A49079CB93F7B8AF2B3D12AEE805E353
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2228-6-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/2228-7-0x000000001005A000-0x000000001005B000-memory.dmp

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memory/2228-8-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/2228-10-0x0000000010000000-0x0000000010067000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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