farfli | 5725d3ccfb99b8f6b7bdbb5b0a0556ad6799fa90152a1220b3f23b86bcc66f31

General

Target
2026-08-08_3441cad9882702224509dfcd38c4475d_coinminer_elex_wannacry.exe
Size 416KB
Sample260808-fps9latydw
SHA256 5725d3ccfb99b8f6b7bdbb5b0a0556ad6799fa90152a1220b3f23b86bcc66f31
MD5 3441cad9882702224509dfcd38c4475d
SHA1 749d3cc16e6ac05a6d78557fa3ccd7e6c969e9ce
SHA512 b9ec8ec11efb0fed5467e179cba99218a3992e15df70e7a597d3fc5f23290241b2d075e235c5913ddbf120b4d91d8b4fa3658dfeb8062193bb20ded95fd41c69
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6Ln:jGmTju+mMC4ITJE8dfSJ/F67
TLSH
T11E94D02272D0CBA3C0856472CE66E63CD3E5CC689D705E3773E9FA1DEA36941423A275
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/4940-8-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral2/memory/4940-10-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/4940-8-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4940-10-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 1 IoCs

resource	yara_rule
behavioral2/files/0x000600000000697a-1.dat	UPX

Badlisted process makes network request 4 IoCs

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

flow	pid	Process
6	4940	rundll32.exe
8	4940	rundll32.exe
9	4940	rundll32.exe
10	4940	rundll32.exe

Deletes itself 1 IoCs

pid	Process
5988	gbjlb.exe

Executes dropped EXE 1 IoCs

pid	Process
5988	gbjlb.exe

Loads dropped DLL 1 IoCs

pid	Process
4940	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-1-5-21-189034102-168398478-1159367937-1000\Software\Microsoft\Windows\CurrentVersion\Run\D3D = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\yhmqm\\omoru.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)	\??\a:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\v:	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)	\??\y:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\s:	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 opened for modification	\??\c:\Program Files\yhmqm	gbjlb.exe
File created	\??\c:\Program Files\yhmqm\omoru.dll	gbjlb.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
5288	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	gbjlb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-08_3441cad9882702224509dfcd38c4475d_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
5288	cmd.exe
5808	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
5808	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4940	rundll32.exe
4940	rundll32.exe
4940	rundll32.exe
4940	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4940	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5716	2026-08-08_3441cad9882702224509dfcd38c4475d_coinminer_elex_wannacry.exe
5988	gbjlb.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5716 wrote to memory of 5288	5716	2026-08-08_3441cad9882702224509dfcd38c4475d_coinminer_elex_wannacry.exe	89
PID 5288 wrote to memory of 5808	5288	cmd.exe	91
PID 5288 wrote to memory of 5988	5288	cmd.exe	92
PID 5988 wrote to memory of 4940	5988	gbjlb.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-08_3441cad9882702224509dfcd38c4475d_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-08_3441cad9882702224509dfcd38c4475d_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5716
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\gbjlb.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-08_3441cad9882702224509dfcd38c4475d_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:5288
- - 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:5808
- - C:\Users\Admin\AppData\Local\Temp\gbjlb.exe
    C:\Users\Admin\AppData\Local\Temp\\gbjlb.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-08_3441cad9882702224509dfcd38c4475d_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:5988
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\yhmqm\omoru.dll",InitEngine C:\Users\Admin\AppData\Local\Temp\gbjlb.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:4940

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

gbjlb.exe

Path C:\Users\Admin\AppData\Local\Temp\gbjlb.exe
Size 416KB
SHA256 5130373c644c341e1cb499ac00b8e8df512b4549bc3cb098d8e80d21537a0246
MD5 5855d332c37b0e3aaa5a12f009c3bd12
SHA1 8252251b7d9bdd8a8eeb39fd7f2f5dc6c6f5a73a
SHA512 0a7d695107cccb164455284cd1caf868b752b7c469e9345ca7cd1a78b753c16a57a4d009d630be05dbf9ddc76f86b9dabd23dba7dab65d196f8edbc8f1774fe1
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6L:jGmTju+mMC4ITJE8dfSJ/F6
TLSH
T12994D02272D0CBA3C0856472CE66E63CD3E5CC689D705E3773E9FA1DEA36941423A275
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

omoru.dll

Path \??\c:\Program Files\yhmqm\omoru.dll
Size 176KB
SHA256 e17501418a40408e6e3b9e4eb2b5fdd07d45414ce7957f89b6a3340a717bfea0
MD5 ac5e88ad65e3655fc81c09e5d5362f85
SHA1 e4bce3b2ca4f54fffdf249ca7e29150e9f3da659
SHA512 1abdfbd325de854e28abd79da42c30a8411561dd50630d800f057867cd964f144d6f10f9370316d43ac92f96ea6d4a009a2bc49fee1e97bed43356b289df2626
SSDEEP 3072:KiDJQVl82dm+NBiPAaHDb0gL/CyGbEPVMnY0RVjatbmKb6DWSFoocP:1Jv2tOItshGYdMnYYVjasKbOWSFofP
TLSH
T1A0041261862D1C34D087B7717F05920DF6B452A49179CB93F6B8AF2A3C12AEA806E353
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4940-8-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/4940-7-0x000000001005A000-0x000000001005B000-memory.dmp

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memory/4940-6-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/4940-10-0x0000000010000000-0x0000000010067000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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