farfli | 9f8cfba49fc4d17e27b4eb1fd35801fd8d5d0ff012cbbc32bbd132740251beee

General

Target
2026-07-06_537bb1fd6cefdd9f073c3ec3e7bde633_coinminer_elex_wannacry.exe
Size 399KB
Sample260706-1e7z8aby21
SHA256 9f8cfba49fc4d17e27b4eb1fd35801fd8d5d0ff012cbbc32bbd132740251beee
MD5 537bb1fd6cefdd9f073c3ec3e7bde633
SHA1 9014d2ce7f16ada3741939db30e25048206a4479
SHA512 b06e4dbd630a1a48ae132c96be9e3dffdc7647ebcfb6f553de31180e0b737573b40fcece471d598e80f80bded522a6c218595f09f6ef6dff93c881c61c215024
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6L:jGmTju+mMC4ITJE8dfSJ/F6
TLSH
T15094D02272C48BA3C1866432CDA6A67CD3F5CD689C309E3773E9F65DDE36841423A275
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/4808-9-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral1/memory/4808-11-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral1/memory/4808-9-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4808-11-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 1 IoCs

resource	yara_rule
behavioral1/files/0x000500000002345a-3.dat	UPX

Badlisted process makes network request 4 IoCs

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

flow	pid	Process
5	4808	rundll32.exe
10	4808	rundll32.exe
11	4808	rundll32.exe
35	4808	rundll32.exe

Deletes itself 1 IoCs

pid	Process
60	ydkrobi.exe

Executes dropped EXE 1 IoCs

pid	Process
60	ydkrobi.exe

Loads dropped DLL 1 IoCs

pid	Process
4808	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-1-5-21-540052884-2969440504-464782435-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\D3D = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\pldsbx\\yqiji.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)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	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)	\??\i:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\p:	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\pldsbx\yqiji.dll	ydkrobi.exe
File opened for modification	\??\c:\Program Files\pldsbx	ydkrobi.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	ydkrobi.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-07-06_537bb1fd6cefdd9f073c3ec3e7bde633_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

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
4876	cmd.exe
2964	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
2964	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4808	rundll32.exe
4808	rundll32.exe
4808	rundll32.exe
4808	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4808	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2800	2026-07-06_537bb1fd6cefdd9f073c3ec3e7bde633_coinminer_elex_wannacry.exe
60	ydkrobi.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2800 wrote to memory of 4876	2800	2026-07-06_537bb1fd6cefdd9f073c3ec3e7bde633_coinminer_elex_wannacry.exe	84
PID 4876 wrote to memory of 2964	4876	cmd.exe	86
PID 4876 wrote to memory of 60	4876	cmd.exe	87
PID 60 wrote to memory of 4808	60	ydkrobi.exe	88

C:\Users\Admin\AppData\Local\Temp\2026-07-06_537bb1fd6cefdd9f073c3ec3e7bde633_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-06_537bb1fd6cefdd9f073c3ec3e7bde633_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2800
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\ydkrobi.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-06_537bb1fd6cefdd9f073c3ec3e7bde633_coinminer_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4876
- - 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:2964
- - C:\Users\Admin\AppData\Local\Temp\ydkrobi.exe
    C:\Users\Admin\AppData\Local\Temp\\ydkrobi.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-06_537bb1fd6cefdd9f073c3ec3e7bde633_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:60
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\pldsbx\yqiji.dll",InitEngine C:\Users\Admin\AppData\Local\Temp\ydkrobi.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:4808

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

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Downloads

yqiji.dll

Path C:\Program Files\pldsbx\yqiji.dll
Size 176KB
SHA256 59ab47f34f0f654c228ad1211cf9ed40e9d5744873a9a21258af21df0aa63dce
MD5 354c65621b2867e5ac20669336667ec5
SHA1 b0c8bf28c01911173bfcf1d8fee8aa85e6aecddf
SHA512 29a0d118ea6b1bf77579cb67106dff3e8dc83950adabf8ca0e3ecbfcd675d6769d75450cbb605020e27aae2b40792aaf3a38a41d93d7823bec8d4efee6f33b63
SSDEEP 3072:KiDJQVl82dm+NBiPAaHDb0gL/CyGbEPVMnY0RVjatbmKb6DWSFoocK:1Jv2tOItshGYdMnYYVjasKbOWSFofK
TLSH
T1C7041261862D1C34D087B7717B05924DF6B452A49079CBD3F7B8AF2B3D12AEA805E353
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ydkrobi.exe

Path C:\Users\Admin\AppData\Local\Temp\ydkrobi.exe
Size 399KB
SHA256 d3ee5bf323288d1e0d459830ac183c1e8a84f10cffa4cd5abd4224218fcf787d
MD5 3ca5cef0747019d9ea5dafd3796c1286
SHA1 b5c56849a442736885ea9fe276ada2fe0d6ff8d4
SHA512 55b469533186b5e3f38c47423b36a54bb8f64aa00a95c4af2ce01811fe1f09a77652c38b8c46361ff39459580bb41995b52107d3cd2e37746249ee0115b38cac
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6Lj:jGmTju+mMC4ITJE8dfSJ/F63
TLSH
T13894D02272C48BA3C1866432CDA6A67CD3F5CD689C309E3773E9F65DDE36841423A275
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4808-8-0x000000001005A000-0x000000001005B000-memory.dmp

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memory/4808-9-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/4808-7-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/4808-11-0x0000000010000000-0x0000000010067000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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