farfli | b0385b23d9b44290833769c06c12436fb8a54dbeff54afbdb421a893347b9faf

General

Target
2026-08-09_95879d55093ab57c8cc1eed3962bf834_coinminer_elex_wannacry.exe
Size 415KB
Sample260809-hd2spsar4y
SHA256 b0385b23d9b44290833769c06c12436fb8a54dbeff54afbdb421a893347b9faf
MD5 95879d55093ab57c8cc1eed3962bf834
SHA1 b972ae9e227adf75d9789092fe0608fa3c88ccf5
SHA512 7dbcd9cc6044116e343101d6b90c16cfc44a753fcee7858279535183fd3a22186219ac41522e6b85b47f50dc35d666867d0130192545bafd58ef31f7f110f958
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6Lw:jGmTju+mMC4ITJE8dfSJ/F60
TLSH
T1BC94D02272D0CBA3C0856432CE66E63CD3E5CC689D705E3773E9FA5DEA36941423A275
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/4132-9-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral1/memory/4132-11-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral1/memory/4132-9-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4132-11-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 1 IoCs

resource	yara_rule
behavioral1/files/0x000c0000000242ac-3.dat	UPX

Badlisted process makes network request 4 IoCs

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

flow	pid	Process
14	4132	rundll32.exe
20	4132	rundll32.exe
21	4132	rundll32.exe
34	4132	rundll32.exe

Deletes itself 1 IoCs

pid	Process
1640	xjyzg.exe

Executes dropped EXE 1 IoCs

pid	Process
1640	xjyzg.exe

Loads dropped DLL 1 IoCs

pid	Process
4132	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-1-5-21-876885714-46325919-1482798410-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\D3D = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\oimdn\\stoxlvmt.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)	\??\n:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	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\oimdn	xjyzg.exe
File created	\??\c:\Program Files\oimdn\stoxlvmt.dll	xjyzg.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
5112	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	xjyzg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-09_95879d55093ab57c8cc1eed3962bf834_coinminer_elex_wannacry.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
4460	PING.EXE
5112	cmd.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
4460	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4132	rundll32.exe
4132	rundll32.exe
4132	rundll32.exe
4132	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4132	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4624	2026-08-09_95879d55093ab57c8cc1eed3962bf834_coinminer_elex_wannacry.exe
1640	xjyzg.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4624 wrote to memory of 5112	4624	2026-08-09_95879d55093ab57c8cc1eed3962bf834_coinminer_elex_wannacry.exe	88
PID 5112 wrote to memory of 4460	5112	cmd.exe	90
PID 5112 wrote to memory of 1640	5112	cmd.exe	91
PID 1640 wrote to memory of 4132	1640	xjyzg.exe	92

C:\Users\Admin\AppData\Local\Temp\2026-08-09_95879d55093ab57c8cc1eed3962bf834_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-09_95879d55093ab57c8cc1eed3962bf834_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4624
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\xjyzg.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-09_95879d55093ab57c8cc1eed3962bf834_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:5112
- - 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:4460
- - C:\Users\Admin\AppData\Local\Temp\xjyzg.exe
    C:\Users\Admin\AppData\Local\Temp\\xjyzg.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-09_95879d55093ab57c8cc1eed3962bf834_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:1640
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\oimdn\stoxlvmt.dll",InitEngine C:\Users\Admin\AppData\Local\Temp\xjyzg.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:4132

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

stoxlvmt.dll

Path C:\Program Files\oimdn\stoxlvmt.dll
Size 176KB
SHA256 5354580d4e867953aa9c232b32bdf50b9d965640e5a55a066707636fb11b331f
MD5 8d907d9d339a97e572ae688841010be2
SHA1 67c8a4260009b705f4d5b3d37cc23296f0abcdd5
SHA512 86ac92e4dc727bcfca447b5f7f47d06a3a823b131082f7cfb78242a34e6ec03b63a6cd6a1bd4f835ba76913c285b29d9d278023b4ed7c9770e59293a9d54f7f2
SSDEEP 3072:KiDJQVl82dm+NBiPAaHDb0gL/CyGbEPVMnY0RVjatbmKb6DWSFoocj:1Jv2tOItshGYdMnYYVjasKbOWSFofj
TLSH
T144041261866D1C34D087B7717B05920DF6B453A49079CB93F7B8AF2B3D12AEA805E353
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

xjyzg.exe

Path C:\Users\Admin\AppData\Local\Temp\xjyzg.exe
Size 416KB
SHA256 5af1f8fca0ad8a2be07d4af7d090f46ee25e85d6ac35ba057f95b9bcea2a276c
MD5 cf1ffc70976c3432963f3ca5a9f7d8f3
SHA1 24204362d67b25039ead810ad9c140143881a03c
SHA512 37fb21af15b7364c252e029975336bdd0189fae92d82379f2b8bacbe469046d6426b76c362ff77085a50190e0c350137554dfd52051ed40a78121e345ae06d7e
SSDEEP 6144:TKgGmTBBuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F6L:jGmTju+mMC4ITJE8dfSJ/F6
TLSH
T19894D02272D0CBA3C0856432CE66E63CD3E5CC689D705E3773E9FA5DEA36941423A275
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4132-7-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/4132-9-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/4132-8-0x000000001005A000-0x000000001005B000-memory.dmp

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memory/4132-11-0x0000000010000000-0x0000000010067000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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