farfli | f17a0d43d4cce94642ee988c4e6783f1b784f72dfc6a7ca186c560354ddd25f4

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
09/08/2026, 06:31

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General

Target
2026-08-09_b84d9ad498a45e8bf5ab7d6d2c11c5e4_coinminer_elex_wannacry.exe
Size 402KB
Sample260809-haffassdla
SHA256 f17a0d43d4cce94642ee988c4e6783f1b784f72dfc6a7ca186c560354ddd25f4
MD5 b84d9ad498a45e8bf5ab7d6d2c11c5e4
SHA1 b2e7e94d4ff0800b78ccfc99262fe4c15732158d
SHA512 3307e0ce1584f903edffd140fdcff090bf84156fb74257544af9e2f1d2b8a428f2134115cc14aa4586ac7037c45a9e87ae6067b55c70dcc429b8e33c09a8e67a
SSDEEP 12288:zdDU6g13sJd1fm/+yb3O2js82ydU/DdKumH:zdE3sJd1fm/+yb3OYs84/JH6
TLSH
T1EA94AF01E78351D6DE8225B081FA7377B3789A4D0F12C7E3BB68EE2E6E211D1953B119
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 4 IoCs

resource	yara_rule
behavioral1/memory/5660-14-0x0000000010000000-0x0000000010033000-memory.dmp	family_farfli
behavioral1/memory/5660-15-0x0000000010000000-0x0000000010033000-memory.dmp	family_farfli
behavioral1/memory/5660-17-0x0000000010000000-0x0000000010033000-memory.dmp	family_farfli
behavioral1/memory/5660-20-0x0000000010000000-0x0000000010033000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 4 IoCs

resource	yara_rule
behavioral1/memory/5660-14-0x0000000010000000-0x0000000010033000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/5660-15-0x0000000010000000-0x0000000010033000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/5660-17-0x0000000010000000-0x0000000010033000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/5660-20-0x0000000010000000-0x0000000010033000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 9 IoCs

resource	yara_rule
behavioral1/memory/364-0-0x0000000000400000-0x0000000000471000-memory.dmp	UPX
behavioral1/memory/364-2-0x0000000000400000-0x0000000000471000-memory.dmp	UPX
behavioral1/files/0x000900000002453e-4.dat	UPX
behavioral1/memory/4132-11-0x0000000000400000-0x0000000000471000-memory.dmp	UPX
behavioral1/files/0x000800000002464f-10.dat	UPX
behavioral1/memory/5660-14-0x0000000010000000-0x0000000010033000-memory.dmp	UPX
behavioral1/memory/5660-15-0x0000000010000000-0x0000000010033000-memory.dmp	UPX
behavioral1/memory/5660-17-0x0000000010000000-0x0000000010033000-memory.dmp	UPX
behavioral1/memory/5660-20-0x0000000010000000-0x0000000010033000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
4132	olejj.exe

Executes dropped EXE 2 IoCs

pid	Process
4132	olejj.exe
5660	urdeucoho.exe

Loads dropped DLL 1 IoCs

pid	Process
5660	urdeucoho.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-1-5-21-3053180483-1881419501-3594244048-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\VIEW = "c:\\Program Files\\yywkr\\urdeucoho.exe \"c:\\Program Files\\yywkr\\urdeucoho.dll\",Viewer"	urdeucoho.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)	\??\w:	urdeucoho.exe
File opened (read-only)	\??\y:	urdeucoho.exe
File opened (read-only)	\??\a:	urdeucoho.exe
File opened (read-only)	\??\b:	urdeucoho.exe
File opened (read-only)	\??\k:	urdeucoho.exe
File opened (read-only)	\??\l:	urdeucoho.exe
File opened (read-only)	\??\m:	urdeucoho.exe
File opened (read-only)	\??\q:	urdeucoho.exe
File opened (read-only)	\??\u:	urdeucoho.exe
File opened (read-only)	\??\e:	urdeucoho.exe
File opened (read-only)	\??\j:	urdeucoho.exe
File opened (read-only)	\??\n:	urdeucoho.exe
File opened (read-only)	\??\p:	urdeucoho.exe
File opened (read-only)	\??\r:	urdeucoho.exe
File opened (read-only)	\??\x:	urdeucoho.exe
File opened (read-only)	\??\t:	urdeucoho.exe
File opened (read-only)	\??\v:	urdeucoho.exe
File opened (read-only)	\??\z:	urdeucoho.exe
File opened (read-only)	\??\g:	urdeucoho.exe
File opened (read-only)	\??\h:	urdeucoho.exe
File opened (read-only)	\??\i:	urdeucoho.exe
File opened (read-only)	\??\o:	urdeucoho.exe
File opened (read-only)	\??\s:	urdeucoho.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	urdeucoho.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\yywkr\urdeucoho.exe	olejj.exe
File opened for modification	\??\c:\Program Files\yywkr	olejj.exe
File created	\??\c:\Program Files\yywkr\urdeucoho.dll	olejj.exe
File created	\??\c:\Program Files\yywkr\urdeucoho.exe	olejj.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
2656	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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	olejj.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	urdeucoho.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-09_b84d9ad498a45e8bf5ab7d6d2c11c5e4_coinminer_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
2656	cmd.exe
5684	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	urdeucoho.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	urdeucoho.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
5684	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5660	urdeucoho.exe
5660	urdeucoho.exe
5660	urdeucoho.exe
5660	urdeucoho.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5660	urdeucoho.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
364	2026-08-09_b84d9ad498a45e8bf5ab7d6d2c11c5e4_coinminer_elex_wannacry.exe
4132	olejj.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 364 wrote to memory of 2656	364	2026-08-09_b84d9ad498a45e8bf5ab7d6d2c11c5e4_coinminer_elex_wannacry.exe	87
PID 2656 wrote to memory of 5684	2656	cmd.exe	89
PID 2656 wrote to memory of 4132	2656	cmd.exe	90
PID 4132 wrote to memory of 5660	4132	olejj.exe	91

C:\Users\Admin\AppData\Local\Temp\2026-08-09_b84d9ad498a45e8bf5ab7d6d2c11c5e4_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-09_b84d9ad498a45e8bf5ab7d6d2c11c5e4_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:364
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\olejj.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-09_b84d9ad498a45e8bf5ab7d6d2c11c5e4_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:2656
- - 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:5684
- - C:\Users\Admin\AppData\Local\Temp\olejj.exe
    C:\Users\Admin\AppData\Local\Temp\\olejj.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-09_b84d9ad498a45e8bf5ab7d6d2c11c5e4_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:4132
  - - \??\c:\Program Files\yywkr\urdeucoho.exe
      "c:\Program Files\yywkr\urdeucoho.exe" "c:\Program Files\yywkr\urdeucoho.dll",Viewer C:\Users\Admin\AppData\Local\Temp\olejj.exe
      4⤵
      Executes dropped EXE
      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:5660

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

urdeucoho.exe

Path C:\Program Files\yywkr\urdeucoho.exe
Size 60KB
SHA256 6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910
MD5 889b99c52a60dd49227c5e485a016679
SHA1 8fa889e456aa646a4d0a4349977430ce5fa5e2d7
SHA512 08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641
SSDEEP 1536:H9ykYCTdiHQKrFXmw2RQln5IUmDjoX6+:HlMHprF2nRQln5I
TLSH
T127532AC2FA00C171D4A7563019778F1A5766AC13DB728ACB94B0B4A41EB3291AD3E5FF
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

olejj.exe

Path C:\Users\Admin\AppData\Local\Temp\olejj.exe
Size 402KB
SHA256 10b64d3bc5f2106c5a0ffc6b78c8a3259f16086ec6fdc57ecda43c0b5659c3e9
MD5 932d525013a4057e10af7a815d6a3e06
SHA1 f8ec3c79b74c97f561d2f7ce504b276d282c4800
SHA512 d426d295420de7fefeb5497c1fb34f71344a630c52d949d40b6f6177bfc7a571025aa32962cfdc7ba65475e97db625e16c89a9b5bfd2503c03dc7cafcaef56b1
SSDEEP 12288:zdDU6g13sJd1fm/+yb3O2js82ydU/DdKumHM:zdE3sJd1fm/+yb3OYs84/JH6M
TLSH
T18894AF01E78351D6DE8225B081FA7377B3789A4D0F12C7E3BB68EE2E6E211D1953B119
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

urdeucoho.dll

Path \??\c:\Program Files\yywkr\urdeucoho.dll
Size 89KB
SHA256 631a0aad029e46c64189b43b866efbe826763e919fe37564d75cee47bb6212b3
MD5 8e347076df58bf6f35b3535d68d6b0e7
SHA1 18f9c7b9aadc8c667c52e57cbd06e51be9cb163e
SHA512 0b209b9f9589d36ae0242651ee2fcd7854d90edfdd5c8d4fd1498f653b6e10832b2485f199f99027c4cc9af10eb1fe236564fec5aa0d403363dabd37a683bb0f
SSDEEP 1536:XHXqO6ZG03eyenOj9lgA/PObuTMT5NMCfL7ojaZf5aZlBlGr:M1uF6Feu2NlQOBcGr
TLSH
T1659312C44669CD8BCCD87072327FAA4EE631C4CCB941ACB34A5E13A71A36AF3D41A705
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/364-0-0x0000000000400000-0x0000000000471000-memory.dmp

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memory/364-2-0x0000000000400000-0x0000000000471000-memory.dmp

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memory/4132-11-0x0000000000400000-0x0000000000471000-memory.dmp

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memory/5660-14-0x0000000010000000-0x0000000010033000-memory.dmp

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memory/5660-15-0x0000000010000000-0x0000000010033000-memory.dmp

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memory/5660-17-0x0000000010000000-0x0000000010033000-memory.dmp

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memory/5660-20-0x0000000010000000-0x0000000010033000-memory.dmp

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