farfli | ee09f1c993f63e43b81aed96ab547b6e0998277613bbc3fb0eb5270bac025cb1

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
10/08/2026, 09:22

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General

Target
2026-08-10_f743863a78ee463b0661685149977a6b_coinminer_elex_wannacry.exe
Size 296KB
Sample260810-lcb3faem4t
SHA256 ee09f1c993f63e43b81aed96ab547b6e0998277613bbc3fb0eb5270bac025cb1
MD5 f743863a78ee463b0661685149977a6b
SHA1 50ecce7362297eaf0a29c01b36e13c1cd30651a4
SHA512 8a6fd42e6c0568d57bbe5b37b3b1679cba8a3e097b98aab027db89072dc04b3ffc9c2a50a81d99fef4b36476db3409406e01d8b6bb1c408da542e83911201e79
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrOU:ywLcCmuErglr73aAD+R
TLSH
T1D2540282E501DF17EC2FC7B6813E5E291217AF621B705597D3C0B91E26B3682B63A0DD
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli persistence spyware stealer upx

Malware Config

Signatures

Family: Farfli
Farfli is a Windows backdoor written in C++.
backdoor farfli

Detects Farfli Backdoor 7 IoCs

resource	yara_rule
behavioral1/memory/4840-12-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/4840-14-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/4840-16-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/4840-19-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/4840-20-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/4840-21-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/4840-22-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 7 IoCs

resource	yara_rule
behavioral1/memory/4840-12-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4840-14-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4840-16-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4840-19-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4840-20-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4840-21-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4840-22-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/3464-0-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral1/memory/3464-2-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral1/files/0x001100000002435f-5.dat	UPX
behavioral1/memory/2948-7-0x0000000000400000-0x0000000000483000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
5	4840	rundll32.exe
13	4840	rundll32.exe
14	4840	rundll32.exe
15	4840	rundll32.exe
30	4840	rundll32.exe
38	4840	rundll32.exe
45	4840	rundll32.exe
55	4840	rundll32.exe

Deletes itself 1 IoCs

pid	Process
2948	wfsmib.exe

Executes dropped EXE 1 IoCs

pid	Process
2948	wfsmib.exe

Loads dropped DLL 1 IoCs

pid	Process
4840	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-1-5-21-540052884-2969440504-464782435-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Wetor = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\bdrfapu\\aurxc.dll\",GetProc"	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)	\??\g:	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)	\??\a:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	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)	\??\e:	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

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/3464-0-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral1/memory/3464-2-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral1/files/0x001100000002435f-5.dat	upx
behavioral1/memory/2948-7-0x0000000000400000-0x0000000000483000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\bdrfapu	wfsmib.exe
File created	\??\c:\Program Files\bdrfapu\aurxc.dll	wfsmib.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
4728	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	2026-08-10_f743863a78ee463b0661685149977a6b_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	wfsmib.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
4728	cmd.exe
2708	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
2708	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4840	rundll32.exe
4840	rundll32.exe
4840	rundll32.exe
4840	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4840	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3464	2026-08-10_f743863a78ee463b0661685149977a6b_coinminer_elex_wannacry.exe
2948	wfsmib.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3464 wrote to memory of 4728	3464	2026-08-10_f743863a78ee463b0661685149977a6b_coinminer_elex_wannacry.exe	84
PID 4728 wrote to memory of 2708	4728	cmd.exe	86
PID 4728 wrote to memory of 2948	4728	cmd.exe	87
PID 2948 wrote to memory of 4840	2948	wfsmib.exe	88

C:\Users\Admin\AppData\Local\Temp\2026-08-10_f743863a78ee463b0661685149977a6b_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-10_f743863a78ee463b0661685149977a6b_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3464
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\wfsmib.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-10_f743863a78ee463b0661685149977a6b_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:4728
- - 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:2708
- - C:\Users\Admin\AppData\Local\Temp\wfsmib.exe
    C:\Users\Admin\AppData\Local\Temp\\wfsmib.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-10_f743863a78ee463b0661685149977a6b_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:2948
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\bdrfapu\aurxc.dll",GetProc C:\Users\Admin\AppData\Local\Temp\wfsmib.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:4840

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

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Downloads

wfsmib.exe

Path C:\Users\Admin\AppData\Local\Temp\wfsmib.exe
Size 296KB
SHA256 e95953a50ef856d7b3be3ccaf35e4a802b519026fb5c43bb56cc04ce984549b3
MD5 6afc78f473cc4436a957a968ba580cc0
SHA1 3a155526d8a652973c8e7df0311970b69c7687df
SHA512 08938215f8a74add5c57cae334a386086c70419872d84077bde019add6aef27d6302dfbd399cd3ded24d170705350c89b2e0cd1ebb406c52890e413146b54f4a
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrO/:ywLcCmuErglr73aAD+C
TLSH
T17C540282E501DF17EC2FC7B6813E5E291217AF621B705597D3C0B91E26B3682B63A0DD
MD5 SHA1 SHA512 SSDEEP TLSH

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aurxc.dll

Path \??\c:\Program Files\bdrfapu\aurxc.dll
Size 218KB
SHA256 ebe153a6fd3d8c79352cd0f925b99020eb20da23a385b1ed70f42e17fcea95fc
MD5 106113f5840d3ff4b8e0ebe6ae5b6629
SHA1 efd52324df3434c44311d45db3d5d86f6a33594b
SHA512 4f0175fc9ab59f89c500250ad4792df94ce3854eb894031dd1d4aec42444e1d311b71936e6d1c8843a981b24381ccacbb092bf8347c777248f3c8f0d8f377da3
SSDEEP 6144:KORxNwD2VOidhzeXwddDzLi5vOQEqscr0ZTJauyt0:pnNwDTi3swddDiROXIq
TLSH
T11724128BCF983873C5223379597951A0B9325290AFA1534D92E6D34FA072BA2CF7B531
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2948-7-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3464-0-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3464-2-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/4840-14-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4840-12-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4840-11-0x0000000002CC0000-0x0000000002CC1000-memory.dmp

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memory/4840-10-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4840-16-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4840-17-0x0000000002CC0000-0x0000000002CC1000-memory.dmp

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memory/4840-19-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4840-20-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4840-21-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4840-22-0x0000000010000000-0x0000000010058000-memory.dmp

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