farfli | fd8df139f251ecd92421f2fba96072f70e09b2e3901b8d44afca920bd102bf58

General

Target
2026-08-07_ac4012ceae968b1a71f82c23fb5bab1a_coinminer_elex_wannacry.exe
Size 419KB
Sample260807-eckagsxaja
SHA256 fd8df139f251ecd92421f2fba96072f70e09b2e3901b8d44afca920bd102bf58
MD5 ac4012ceae968b1a71f82c23fb5bab1a
SHA1 a1107e0aef7a00e836709a0eb76fb650ecc698e0
SHA512 ff49f20d1a503c1390e00c142c9a1015f50b49d6ff49f65ad692809eeda33f3234e263ceeb3e501c53ed1509ae021006c37a6e362719f1d8feb2a6794c777bc2
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6Lx:jGmTju+mMC4ITJE8dfSJ/F6N
TLSH
T14294D02272D0CBA3C0856472CE66E63CD3E5CC689D705E3773E9F65EEA36901423A275
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
behavioral1/memory/4724-9-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral1/memory/4724-11-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral1/memory/4724-9-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4724-11-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 1 IoCs

resource	yara_rule
behavioral1/files/0x0012000000024381-2.dat	UPX

Badlisted process makes network request 4 IoCs

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

flow	pid	Process
10	4724	rundll32.exe
15	4724	rundll32.exe
16	4724	rundll32.exe
26	4724	rundll32.exe

Deletes itself 1 IoCs

pid	Process
2560	upwbn.exe

Executes dropped EXE 1 IoCs

pid	Process
2560	upwbn.exe

Loads dropped DLL 1 IoCs

pid	Process
4724	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-1-5-21-1788976790-1541110888-1636651838-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\D3D = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\dhprk\\wqkux.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)	\??\u:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\r:	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)	\??\l:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\t:	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\dhprk\wqkux.dll	upwbn.exe
File opened for modification	\??\c:\Program Files\dhprk	upwbn.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
4904	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	upwbn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-07_ac4012ceae968b1a71f82c23fb5bab1a_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
4904	cmd.exe
3480	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3480	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4724	rundll32.exe
4724	rundll32.exe
4724	rundll32.exe
4724	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4724	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3948	2026-08-07_ac4012ceae968b1a71f82c23fb5bab1a_coinminer_elex_wannacry.exe
2560	upwbn.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3948 wrote to memory of 4904	3948	2026-08-07_ac4012ceae968b1a71f82c23fb5bab1a_coinminer_elex_wannacry.exe	86
PID 4904 wrote to memory of 3480	4904	cmd.exe	88
PID 4904 wrote to memory of 2560	4904	cmd.exe	90
PID 2560 wrote to memory of 4724	2560	upwbn.exe	91

C:\Users\Admin\AppData\Local\Temp\2026-08-07_ac4012ceae968b1a71f82c23fb5bab1a_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-07_ac4012ceae968b1a71f82c23fb5bab1a_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3948
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\upwbn.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-07_ac4012ceae968b1a71f82c23fb5bab1a_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:4904
- - 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:3480
- - C:\Users\Admin\AppData\Local\Temp\upwbn.exe
    C:\Users\Admin\AppData\Local\Temp\\upwbn.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-07_ac4012ceae968b1a71f82c23fb5bab1a_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:2560
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\dhprk\wqkux.dll",InitEngine C:\Users\Admin\AppData\Local\Temp\upwbn.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:4724

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

upwbn.exe

Path C:\Users\Admin\AppData\Local\Temp\upwbn.exe
Size 419KB
SHA256 2ad696be8822b26503d030999e0d374af9ef8868ec73ca130aca0c6e6170849a
MD5 2deac0e39474baee75d3dd98e7148ab4
SHA1 4873de38470913f05b47590c009ecd4d0d9e4225
SHA512 36e37c8906eed46aa4ddf62d19639a8e73595deb53153c8deb8dac75b77475a1f0eafdde5377b3e7a2f9c5fa6b90952127d43af8aeedcfedbc994e49a43bd86a
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6L:jGmTju+mMC4ITJE8dfSJ/F6
TLSH
T15394D02272D0CBA3C0856472CE66E63CD3E5CC689D705E3773E9F65EEA36901423A275
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

wqkux.dll

Path \??\c:\Program Files\dhprk\wqkux.dll
Size 176KB
SHA256 9e31a0f9ab0a28e06dc863adbbd154b15f304a4d27145193189f8c49f4ba981e
MD5 d1de66de6eb0ae48ab6c0b6013ba5f39
SHA1 c9e2d32924914ff4cb44e3a934bb43f8b1d03399
SHA512 5dc775099ed932cf8c65cd18da669f39b538b437c5aa37dad73ef8f5180913cfca8256ee98fe5c18f66bf6804c27ca8e00ae1346cc22a73086f41dc91813949b
SSDEEP 3072:KiDJQVl82dm+NBiPAaHDb0gL/CyGbEPVMnY0RVjatbmKb6DWSFoocT:1Jv2tOItshGYdMnYYVjasKbOWSFofT
TLSH
T1BC041261866D1C34D087B7B17B05920DF6B453A49079CB93F7B8AF2B3D12AEA805E353
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4724-8-0x000000001005A000-0x000000001005B000-memory.dmp

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memory/4724-7-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/4724-9-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/4724-11-0x0000000010000000-0x0000000010067000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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