farfli | e9438f91f223f5d25447981ab442d300c5590708d4ea1ea776e0790a8207b86e

Analysis

max time kernel
148s
max time network
138s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
09/08/2026, 06:20

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General

Target
2026-08-09_ffe5fbf5c1836228c5219f3051942914_coinminer_elex_wannacry.exe
Size 294KB
Sample260809-g3rhlasbrh
SHA256 e9438f91f223f5d25447981ab442d300c5590708d4ea1ea776e0790a8207b86e
MD5 ffe5fbf5c1836228c5219f3051942914
SHA1 39eaad9369befe8a179f47d09f2d17313f922d7f
SHA512 c774441e94b5e66bf5110ec9259e8e20c0acf0f9180d91d6cf6fe11ab66162e48418384d1a22695efe77f60cb054f2aaf8d4d0d77e76cc76838f9266b64261dc
SSDEEP 3072:qtaoOzbY5l/Tx1DUDcbouGYefD5h1zZCBgb3EInA3rdCKA9bwpfMrgsAHuskkyc8:qtatPE5Txvev1zQBgexOdw6rpI9Fs29g
TLSH
T104547C1233E44869E4EA3A32CE76A630D7F6E975AC33D67F03D4430E5A36A04CB55366
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 3 IoCs

resource	yara_rule
behavioral2/memory/3716-11-0x0000000010000000-0x0000000010038000-memory.dmp	family_farfli
behavioral2/memory/3716-13-0x0000000010000000-0x0000000010038000-memory.dmp	family_farfli
behavioral2/memory/3716-16-0x0000000010000000-0x0000000010038000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/3716-11-0x0000000010000000-0x0000000010038000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3716-13-0x0000000010000000-0x0000000010038000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3716-16-0x0000000010000000-0x0000000010038000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 9 IoCs

resource	yara_rule
behavioral2/memory/5860-0-0x0000000000400000-0x000000000043F000-memory.dmp	UPX
behavioral2/memory/5860-2-0x0000000000400000-0x000000000043F000-memory.dmp	UPX
behavioral2/files/0x000c000000019cc9-3.dat	UPX
behavioral2/memory/4880-7-0x0000000000400000-0x000000000043F000-memory.dmp	UPX
behavioral2/files/0x000d00000001c621-8.dat	UPX
behavioral2/memory/3716-10-0x0000000010000000-0x0000000010038000-memory.dmp	UPX
behavioral2/memory/3716-11-0x0000000010000000-0x0000000010038000-memory.dmp	UPX
behavioral2/memory/3716-13-0x0000000010000000-0x0000000010038000-memory.dmp	UPX
behavioral2/memory/3716-16-0x0000000010000000-0x0000000010038000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
4880	bquuktctk.exe

Executes dropped EXE 2 IoCs

pid	Process
4880	bquuktctk.exe
3716	mpk.exe

Loads dropped DLL 1 IoCs

pid	Process
3716	mpk.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-1-5-21-1738198120-2966725515-3980530802-1000\Software\Microsoft\Windows\CurrentVersion\Run\Vicity = "c:\\Program Files\\kehxe\\mpk.exe \"c:\\Program Files\\kehxe\\mpkjc.dll\",Group"	mpk.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)	\??\h:	mpk.exe
File opened (read-only)	\??\i:	mpk.exe
File opened (read-only)	\??\j:	mpk.exe
File opened (read-only)	\??\p:	mpk.exe
File opened (read-only)	\??\v:	mpk.exe
File opened (read-only)	\??\y:	mpk.exe
File opened (read-only)	\??\a:	mpk.exe
File opened (read-only)	\??\l:	mpk.exe
File opened (read-only)	\??\q:	mpk.exe
File opened (read-only)	\??\s:	mpk.exe
File opened (read-only)	\??\x:	mpk.exe
File opened (read-only)	\??\z:	mpk.exe
File opened (read-only)	\??\b:	mpk.exe
File opened (read-only)	\??\g:	mpk.exe
File opened (read-only)	\??\m:	mpk.exe
File opened (read-only)	\??\n:	mpk.exe
File opened (read-only)	\??\t:	mpk.exe
File opened (read-only)	\??\k:	mpk.exe
File opened (read-only)	\??\o:	mpk.exe
File opened (read-only)	\??\r:	mpk.exe
File opened (read-only)	\??\u:	mpk.exe
File opened (read-only)	\??\w:	mpk.exe
File opened (read-only)	\??\d:	mpk.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	mpk.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000d00000001c621-8.dat	upx
behavioral2/memory/3716-10-0x0000000010000000-0x0000000010038000-memory.dmp	upx
behavioral2/memory/3716-11-0x0000000010000000-0x0000000010038000-memory.dmp	upx
behavioral2/memory/3716-13-0x0000000010000000-0x0000000010038000-memory.dmp	upx
behavioral2/memory/3716-16-0x0000000010000000-0x0000000010038000-memory.dmp	upx

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\kehxe	bquuktctk.exe
File created	\??\c:\Program Files\kehxe\mpkjc.dll	bquuktctk.exe
File created	\??\c:\Program Files\kehxe\mpk.exe	bquuktctk.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
5756	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	bquuktctk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mpk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-09_ffe5fbf5c1836228c5219f3051942914_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
5756	cmd.exe
4864	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	mpk.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	mpk.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4864	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3716	mpk.exe
3716	mpk.exe
3716	mpk.exe
3716	mpk.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3716	mpk.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5860	2026-08-09_ffe5fbf5c1836228c5219f3051942914_coinminer_elex_wannacry.exe
4880	bquuktctk.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5860 wrote to memory of 5756	5860	2026-08-09_ffe5fbf5c1836228c5219f3051942914_coinminer_elex_wannacry.exe	88
PID 5756 wrote to memory of 4864	5756	cmd.exe	90
PID 5756 wrote to memory of 4880	5756	cmd.exe	91
PID 4880 wrote to memory of 3716	4880	bquuktctk.exe	92

C:\Users\Admin\AppData\Local\Temp\2026-08-09_ffe5fbf5c1836228c5219f3051942914_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-09_ffe5fbf5c1836228c5219f3051942914_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5860
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\bquuktctk.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-09_ffe5fbf5c1836228c5219f3051942914_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:5756
- - 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:4864
- - C:\Users\Admin\AppData\Local\Temp\bquuktctk.exe
    C:\Users\Admin\AppData\Local\Temp\\bquuktctk.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-09_ffe5fbf5c1836228c5219f3051942914_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:4880
  - - \??\c:\Program Files\kehxe\mpk.exe
      "c:\Program Files\kehxe\mpk.exe" "c:\Program Files\kehxe\mpkjc.dll",Group C:\Users\Admin\AppData\Local\Temp\bquuktctk.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:3716

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

mpk.exe

Path C:\Program Files\kehxe\mpk.exe
Size 51KB
SHA256 ce6bb7eddc83762c708d4a41709ae00371dbdc09b2a380f28fa60b1edf917473
MD5 2e068ce2770fde8d1af4cb114b98df1f
SHA1 b6f9c2775babb025b22f915c3047aa627d07c312
SHA512 998d695eb56375e63df7db16740b89deb2cf630ccbead8bcf84a921ec6f4a4f9aef2755b703f7190f332b2008ebcc949363bcf8f392d7d07246c255b5073ed35
SSDEEP 1536:6G9yoVEpHP29I3fbcJboSUge5N+CnC/maz9Rh:8pv2mbcJboce58wvOR
TLSH
T137336C236A0A49B3DFE231780A9D7232526DD862075541F7A61057EAFD243E2EE743CF
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

bquuktctk.exe

Path C:\Users\Admin\AppData\Local\Temp\bquuktctk.exe
Size 294KB
SHA256 10a0fd9a7f09a9cdbe0228d5f6fcbe8c467c5a3a4f580f8875214839ffb59cb6
MD5 3d2cf74bfe46770af8d316d75b11165d
SHA1 fade4096c6ea6f537bf133e7c450a459de1a3ebb
SHA512 ebd87038a919e8d04478411562d0529efde06e145fce4a28cc4598b5a7d9946449f31fa92701b48e5e7e93cf9bab06da48939a63c858272c20c7e7eef1e472ed
SSDEEP 3072:qtaoOzbY5l/Tx1DUDcbouGYefD5h1zZCBgb3EInA3rdCKA9bwpfMrgsAHuskkycv:qtatPE5Txvev1zQBgexOdw6rpI9Fs29L
TLSH
T178547C1233E44869E0EA3A72CE76A630D7F6E975AC33D67B03D4430E5A36A04CB55366
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

mpkjc.dll

Path \??\c:\Program Files\kehxe\mpkjc.dll
Size 97KB
SHA256 60d1ad5728b04e6bcd93dc4c0c6fae845b381b18a13ff59802a29290b463979e
MD5 a0c85e8101c47cd10322cb497feeb53e
SHA1 5130fe6cbe31499f04070ea2e1ab79592578f46b
SHA512 2fd65a4bca9181c5223c430829939c2d4e07dfa47ad6362f5e544e538ff1d73d6426fe9b75a345f4f5015d45093560aaacc787bf57ea411284f180ea49b40262
SSDEEP 3072:BDpG6gzgHr5tCmfk455ecDBkdq+SStvAbGO:5pG6Sg9txRk/SS6bGO
TLSH
T1FCA301F6290D7DD6CB394839D6528E25FA29EE348C589F887ECE7C13ACB8410E1645F1
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3716-10-0x0000000010000000-0x0000000010038000-memory.dmp

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memory/3716-11-0x0000000010000000-0x0000000010038000-memory.dmp

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memory/3716-13-0x0000000010000000-0x0000000010038000-memory.dmp

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memory/3716-16-0x0000000010000000-0x0000000010038000-memory.dmp

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memory/4880-7-0x0000000000400000-0x000000000043F000-memory.dmp

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memory/5860-0-0x0000000000400000-0x000000000043F000-memory.dmp

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memory/5860-2-0x0000000000400000-0x000000000043F000-memory.dmp

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