farfli | ddbdcca63f6afa78ff677a2ca8eb6a53275ee51842d5f4fa7c5224da964bb740

General

Target
2026-04-21_2007c8b6fc8da909a42d6c9b5c76d30a_coinminer_elex_wannacry.exe
Size 409KB
Sample260421-jkr3hsdz2x
SHA256 ddbdcca63f6afa78ff677a2ca8eb6a53275ee51842d5f4fa7c5224da964bb740
MD5 2007c8b6fc8da909a42d6c9b5c76d30a
SHA1 17b8ff383a58f0e38a82278e85863920e1c454e6
SHA512 2694166861a6cfcc12ff7d16e817b7050a96bccb792486deaf51cf48c2422683578d98b90a996fc046186700c57ed997bd152704b959b0a71f4c12aae5a97550
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6LS:jGmTju+mMC4ITJE8dfSJ/F6
TLSH
T1D694D02272C08BA3C1866432CDA6EA7CD3E5CD689C705E3773E9F65EDD36941423A274
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/1096-9-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral1/memory/1096-7-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral1/memory/1096-11-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral1/memory/1096-9-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1096-7-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1096-11-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Custom signature

UPX dump on OEP (original entry point) 1 IoCs

resource	yara_rule
behavioral1/files/0x000a00000002414b-2.dat	UPX

Badlisted process makes network request 4 IoCs

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

flow	pid	Process
11	1096	rundll32.exe
19	1096	rundll32.exe
18	1096	rundll32.exe
27	1096	rundll32.exe

Deletes itself 1 IoCs

pid	Process
3784	djnwlkyrt.exe

Executes dropped EXE 1 IoCs

pid	Process
3784	djnwlkyrt.exe

Loads dropped DLL 1 IoCs

pid	Process
1096	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\\idvsu\\dctbqpyn.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)	\??\r:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\u:	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)	\??\k:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	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\idvsu\dctbqpyn.dll	djnwlkyrt.exe
File opened for modification	\??\c:\Program Files\idvsu	djnwlkyrt.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	djnwlkyrt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-21_2007c8b6fc8da909a42d6c9b5c76d30a_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
3780	cmd.exe
1736	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
1736	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1096	rundll32.exe
1096	rundll32.exe
1096	rundll32.exe
1096	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1096	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2844	2026-04-21_2007c8b6fc8da909a42d6c9b5c76d30a_coinminer_elex_wannacry.exe
3784	djnwlkyrt.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2844 wrote to memory of 3780	2844	2026-04-21_2007c8b6fc8da909a42d6c9b5c76d30a_coinminer_elex_wannacry.exe	83
PID 3780 wrote to memory of 1736	3780	cmd.exe	85
PID 3780 wrote to memory of 3784	3780	cmd.exe	86
PID 3784 wrote to memory of 1096	3784	djnwlkyrt.exe	87

C:\Users\Admin\AppData\Local\Temp\2026-04-21_2007c8b6fc8da909a42d6c9b5c76d30a_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-21_2007c8b6fc8da909a42d6c9b5c76d30a_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2844
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\djnwlkyrt.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-21_2007c8b6fc8da909a42d6c9b5c76d30a_coinminer_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3780
- - 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:1736
- - C:\Users\Admin\AppData\Local\Temp\djnwlkyrt.exe
    C:\Users\Admin\AppData\Local\Temp\\djnwlkyrt.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-21_2007c8b6fc8da909a42d6c9b5c76d30a_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:3784
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\idvsu\dctbqpyn.dll",InitEngine C:\Users\Admin\AppData\Local\Temp\djnwlkyrt.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:1096

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

djnwlkyrt.exe

Path C:\Users\Admin\AppData\Local\Temp\djnwlkyrt.exe
Size 409KB
SHA256 44106027fc3c66c7fcf927f647348c21ec7c5fd4115c72af26cd2e408a3fbdf7
MD5 89e111cd5b936aeeb2646e45e023b78a
SHA1 ba66356ce6f8a8c590670f3b9d995df696cf87a8
SHA512 166c7b52ec5b3129f36c8e6cf59bc228bd6944611baa3379862c77d8ac9622805d64d5b31920669c74a53e8f72339eac533e9bbe3d3e0c5ff54ae711f6acde6d
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6LSK:jGmTju+mMC4ITJE8dfSJ/F6V
TLSH
T12A94D02272C08BA3C1866432CDA6E67CD3E5CD689C705E3773E9F65EDE36941423A274
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

dctbqpyn.dll

Path \??\c:\Program Files\idvsu\dctbqpyn.dll
Size 176KB
SHA256 467f03d4484c7a52197af9806dd93e6a6e33508ebc70f36aa837dd489d4e2919
MD5 eb97fca755b57655c650e009b24d3c04
SHA1 e1876f8f87ff22b2d741c5e8a18fcb1acb9d1c74
SHA512 5feb9a67d17d9a0e9dc36e5c3e143aa145e5341827eb66f0c8b659986b4769ac3c7b11973bc3fe7f90ea5745611241187d89930f510b31f89a26d56b9a1d80c8
SSDEEP 3072:KiDJQVl82dm+NBiPAaHDb0gL/CyGbEPVMnY0RVjatbmKb6DWSFoocH:1Jv2tOItshGYdMnYYVjasKbOWSFofH
TLSH
T188041261862D1C34C087B7B17B05920DF6B452A49179CB93F7B8AF2B3C12AEA805E353
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1096-9-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/1096-10-0x000000001005A000-0x000000001005B000-memory.dmp

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memory/1096-7-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/1096-11-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/1096-12-0x0000000000C20000-0x0000000000C9A000-memory.dmp

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memory/1096-14-0x0000000000C20000-0x0000000000C9A000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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