farfli | c40a0d683a6886183f35d29a676af98b0a063f53b576dfed52c7c7323cb4f693

General

Target
2026-09-29_c3a0573f2a5bc56afb2989e914def313_coinminer_elex_wannacry.exe
Size 403KB
Sample260929-vpe5asbf64
SHA256 c40a0d683a6886183f35d29a676af98b0a063f53b576dfed52c7c7323cb4f693
MD5 c3a0573f2a5bc56afb2989e914def313
SHA1 96b3f7c5f2e4c9c4749997e11657b085e10e25bd
SHA512 1a53080d999773de1affc9e3f760e37ecbd8c3bf29dfd3343736879edab46f0bd64635ec17ea076584a8e9cd41abe11d6670315e1d2755ecead2da57cd39a886
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6LS:jGmTju+mMC4ITJE8dfSJ/F6
TLSH
T1C494D02272C08BA3C1866032CDA6EA7CD3E5CD689C705E3773E9F65DDE36941423A275
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit defense_evasion 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/2796-8-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral2/memory/2796-10-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/2796-8-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2796-10-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 1 IoCs

resource	yara_rule
behavioral2/files/0x000600000001b867-1.dat	UPX

Badlisted process makes network request 3 IoCs

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

flow	pid	Process
1	2796	rundll32.exe
3	2796	rundll32.exe
4	2796	rundll32.exe

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
4744	iryku.exe

Executes dropped EXE 1 IoCs

pid	Process
4744	iryku.exe

Loads dropped DLL 1 IoCs

pid	Process
2796	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-1-5-21-650287814-2715975232-1279715623-1000\Software\Microsoft\Windows\CurrentVersion\Run\D3D = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\tgtvu\\johoc.dll\",InitEngine"	rundll32.exe

Enumerates connected drives 3 TTPs 24 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)	\??\b:	rundll32.exe
	\??\f:\	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	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\tgtvu	iryku.exe
File created	\??\c:\Program Files\tgtvu\johoc.dll	iryku.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
4140	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	rundll32.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	rundll32.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	2026-09-29_c3a0573f2a5bc56afb2989e914def313_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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iryku.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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
4140	cmd.exe
2744	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
2744	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2796	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1804	2026-09-29_c3a0573f2a5bc56afb2989e914def313_coinminer_elex_wannacry.exe
4744	iryku.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1804 wrote to memory of 4140	1804	2026-09-29_c3a0573f2a5bc56afb2989e914def313_coinminer_elex_wannacry.exe	89
PID 4140 wrote to memory of 2744	4140	cmd.exe	91
PID 4140 wrote to memory of 4744	4140	cmd.exe	92
PID 4744 wrote to memory of 2796	4744	iryku.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-09-29_c3a0573f2a5bc56afb2989e914def313_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-29_c3a0573f2a5bc56afb2989e914def313_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1804
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\iryku.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-29_c3a0573f2a5bc56afb2989e914def313_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:4140
- - 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:2744
- - C:\Users\Admin\AppData\Local\Temp\iryku.exe
    C:\Users\Admin\AppData\Local\Temp\\iryku.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-29_c3a0573f2a5bc56afb2989e914def313_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:4744
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\tgtvu\johoc.dll",InitEngine C:\Users\Admin\AppData\Local\Temp\iryku.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)
      Reads the TCP/IP host and domain name from the registry
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2796

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:2008

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

Indicator Removal

1

T1070

File Deletion

Modify Registry

Pre-OS Boot

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

2

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

iryku.exe

Path C:\Users\Admin\AppData\Local\Temp\iryku.exe
Size 403KB
SHA256 1a0ea73134853c1ce42132abd734d2f11dde7189e8bb42987965d264256a6a8e
MD5 567446c07eb59f2e801ec363b64d84cc
SHA1 2dd2dc915629f29821b9b338846d7abdf822d1fe
SHA512 d9f473a1cbed966bf4880a53ef6bc57e0cffce5b6bdcf718fe27aae31316ec5c0bbf86c9a55c28c232f5cf624c934aec35e2044909c65e5fc8ce7ed696e082b0
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6LS2:jGmTju+mMC4ITJE8dfSJ/F6/
TLSH
T18D94D02272C08BA3C1866032CDA6E67CD3E5CD689C705E3773E9F65DDE36841423A274
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

johoc.dll

Path \??\c:\Program Files\tgtvu\johoc.dll
Size 176KB
SHA256 470addc0e1d1f6327c1197cf5c6f6d2f2827c583c9d550f92ad64e8d5154e53f
MD5 ff23fc314230de879d58aa678b69abf2
SHA1 0f26bb903bfbcf3b5fae6e722c9137fca6b3d8eb
SHA512 041dea7114d9459bc8bf8e373c07e9a367c64e759f4ce0160b98e4181e8611b9b0633776aec714a2eb3ad37d82b11e62704c4417a23916040e189338794743d9
SSDEEP 3072:KiDJQVl82dm+NBiPAaHDb0gL/CyGbEPVMnY0RVjatbmKb6DWSFoock:1Jv2tOItshGYdMnYYVjasKbOWSFofk
TLSH
T113041261862D1C34D087B7717B05920DFAB452A49079CBD3F7B8AF2B3D12AEA805E353
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2796-7-0x000000001005A000-0x000000001005B000-memory.dmp

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memory/2796-6-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/2796-8-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/2796-10-0x0000000010000000-0x0000000010067000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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