farfli | d5fceab96b14cd4eec3474b5b1527230757fa51e5bcbd7e6e3353cfc7b889070

Analysis

max time kernel
150s
max time network
153s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
20/09/2026, 22:06

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General

Target
2026-09-20_f972ebcd6bc63cfa5b16811844621cce_coinminer_elex_wannacry.exe
Size 287KB
Sample260920-11b5nseq4w
SHA256 d5fceab96b14cd4eec3474b5b1527230757fa51e5bcbd7e6e3353cfc7b889070
MD5 f972ebcd6bc63cfa5b16811844621cce
SHA1 e2f3f67b4c58dc2c7047db180cd7ddb07a90d6d0
SHA512 ff15762970caedd468ac0cd20a8d27fc9bfb0fd930442b91892d9d9433893a03916118408ed1114b6058b4717fb59f1b6b0bc770faf9dc37a5acd9700ac374f8
SSDEEP 3072:qtaoOzbY5l/Tx1DUDcbouGYefD5h1zZCBgb3EInA3rdCKA9bwpfMrgsAHuskkycP:qtatPE5Txvev1zQBgexOdw6rpI9Fs29
TLSH
T17C547C1233E44869E4EA3A72CE76A630D7FAE875AC33D67F03D4430D5A36A04CB55366
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 4 IoCs

resource	yara_rule
behavioral2/memory/2884-10-0x0000000010000000-0x0000000010038000-memory.dmp	family_farfli
behavioral2/memory/2884-11-0x0000000010000000-0x0000000010038000-memory.dmp	family_farfli
behavioral2/memory/2884-13-0x0000000010000000-0x0000000010038000-memory.dmp	family_farfli
behavioral2/memory/2884-16-0x0000000010000000-0x0000000010038000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 4 IoCs

resource	yara_rule
behavioral2/memory/2884-10-0x0000000010000000-0x0000000010038000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2884-11-0x0000000010000000-0x0000000010038000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2884-13-0x0000000010000000-0x0000000010038000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2884-16-0x0000000010000000-0x0000000010038000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 9 IoCs

resource	yara_rule
behavioral2/memory/3324-0-0x0000000000400000-0x000000000043F000-memory.dmp	UPX
behavioral2/memory/3324-2-0x0000000000400000-0x000000000043F000-memory.dmp	UPX
behavioral2/files/0x000600000001b85c-3.dat	UPX
behavioral2/memory/5056-7-0x0000000000400000-0x000000000043F000-memory.dmp	UPX
behavioral2/files/0x000e00000001c521-8.dat	UPX
behavioral2/memory/2884-10-0x0000000010000000-0x0000000010038000-memory.dmp	UPX
behavioral2/memory/2884-11-0x0000000010000000-0x0000000010038000-memory.dmp	UPX
behavioral2/memory/2884-13-0x0000000010000000-0x0000000010038000-memory.dmp	UPX
behavioral2/memory/2884-16-0x0000000010000000-0x0000000010038000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
5056	kdtgw.exe

Executes dropped EXE 2 IoCs

pid	Process
5056	kdtgw.exe
2884	fxx.exe

Loads dropped DLL 1 IoCs

pid	Process
2884	fxx.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-1-5-21-1262770251-41185387-1005173349-1000\Software\Microsoft\Windows\CurrentVersion\Run\Vicity = "c:\\Program Files\\kqiew\\fxx.exe \"c:\\Program Files\\kqiew\\fxxbp.dll\",Group"	fxx.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)	\??\a:	fxx.exe
File opened (read-only)	\??\g:	fxx.exe
File opened (read-only)	\??\h:	fxx.exe
File opened (read-only)	\??\s:	fxx.exe
File opened (read-only)	\??\u:	fxx.exe
File opened (read-only)	\??\z:	fxx.exe
File opened (read-only)	\??\j:	fxx.exe
File opened (read-only)	\??\m:	fxx.exe
File opened (read-only)	\??\n:	fxx.exe
File opened (read-only)	\??\r:	fxx.exe
File opened (read-only)	\??\t:	fxx.exe
File opened (read-only)	\??\w:	fxx.exe
File opened (read-only)	\??\b:	fxx.exe
File opened (read-only)	\??\k:	fxx.exe
File opened (read-only)	\??\l:	fxx.exe
File opened (read-only)	\??\o:	fxx.exe
File opened (read-only)	\??\q:	fxx.exe
File opened (read-only)	\??\x:	fxx.exe
File opened (read-only)	\??\d:	fxx.exe
File opened (read-only)	\??\i:	fxx.exe
File opened (read-only)	\??\p:	fxx.exe
File opened (read-only)	\??\v:	fxx.exe
File opened (read-only)	\??\y:	fxx.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	fxx.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000e00000001c521-8.dat	upx
behavioral2/memory/2884-10-0x0000000010000000-0x0000000010038000-memory.dmp	upx
behavioral2/memory/2884-11-0x0000000010000000-0x0000000010038000-memory.dmp	upx
behavioral2/memory/2884-13-0x0000000010000000-0x0000000010038000-memory.dmp	upx
behavioral2/memory/2884-16-0x0000000010000000-0x0000000010038000-memory.dmp	upx

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	\??\c:\Program Files\kqiew\fxxbp.dll	kdtgw.exe
File created	\??\c:\Program Files\kqiew\fxx.exe	kdtgw.exe
File opened for modification	\??\c:\Program Files\kqiew	kdtgw.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
3376	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	fxx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-09-20_f972ebcd6bc63cfa5b16811844621cce_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	kdtgw.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
3376	cmd.exe
6108	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	fxx.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	fxx.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
6108	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2884	fxx.exe
2884	fxx.exe
2884	fxx.exe
2884	fxx.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2884	fxx.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3324	2026-09-20_f972ebcd6bc63cfa5b16811844621cce_coinminer_elex_wannacry.exe
5056	kdtgw.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3324 wrote to memory of 3376	3324	2026-09-20_f972ebcd6bc63cfa5b16811844621cce_coinminer_elex_wannacry.exe	90
PID 3376 wrote to memory of 6108	3376	cmd.exe	92
PID 3376 wrote to memory of 5056	3376	cmd.exe	93
PID 5056 wrote to memory of 2884	5056	kdtgw.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-09-20_f972ebcd6bc63cfa5b16811844621cce_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-20_f972ebcd6bc63cfa5b16811844621cce_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3324
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\kdtgw.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-20_f972ebcd6bc63cfa5b16811844621cce_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:3376
- - 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:6108
- - C:\Users\Admin\AppData\Local\Temp\kdtgw.exe
    C:\Users\Admin\AppData\Local\Temp\\kdtgw.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-20_f972ebcd6bc63cfa5b16811844621cce_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:5056
  - - \??\c:\Program Files\kqiew\fxx.exe
      "c:\Program Files\kqiew\fxx.exe" "c:\Program Files\kqiew\fxxbp.dll",Group C:\Users\Admin\AppData\Local\Temp\kdtgw.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:2884

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

fxx.exe

Path C:\Program Files\kqiew\fxx.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

kdtgw.exe

Path C:\Users\Admin\AppData\Local\Temp\kdtgw.exe
Size 287KB
SHA256 c0a5812b11ab61421cef02e657c0bef2fef9c57ca620d8af2a13dae64542390f
MD5 43e1a779f5a2b17375b4ade40df667e2
SHA1 7602e561bc2282f7a1758cbb19dd9707ef96b7b0
SHA512 d6fd88f9c9ba0c663d1df8d7dfbf033d9de614f1539a1cb422164903bee5cb8f303f88d4796a9bd51acc48c05a949a5a2d1fb8d04f83c57fd15286da90d870ed
SSDEEP 3072:qtaoOzbY5l/Tx1DUDcbouGYefD5h1zZCBgb3EInA3rdCKA9bwpfMrgsAHuskkycP:qtatPE5Txvev1zQBgexOdw6rpI9Fs29
TLSH
T1F1547C1233E44869E4EA3A72CE76A630D7FAE875AC33D67F03D4430D5A36A04CB55366
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

fxxbp.dll

Path \??\c:\Program Files\kqiew\fxxbp.dll
Size 97KB
SHA256 f558c57a84e8bbf1bb71cf54fdce16d408c942c3ee57c633ec7eb60ff51ca760
MD5 3ee7dfafcefaf9d3243f6d3db4adf45d
SHA1 5ab1872b0a21711ac2bbde88792926d546068616
SHA512 1f673510ea7b63dbf0c7d6cf0dddb76dcbbb9027443767a2c0fad0be7580c13001606dd6fe065f74bf072e232befaa572f810819ac114c509ba4f3e7618534d9
SSDEEP 3072:BDpG6gzgHr5tCmfk455ecDBkdq+SStvAbGK:5pG6Sg9txRk/SS6bGK
TLSH
T100A301F6290D7DD6CB394839D6528E35FA29EE348C549F887ECE6C13ACB8510E1641F1
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2884-10-0x0000000010000000-0x0000000010038000-memory.dmp

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memory/2884-11-0x0000000010000000-0x0000000010038000-memory.dmp

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memory/2884-13-0x0000000010000000-0x0000000010038000-memory.dmp

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memory/2884-16-0x0000000010000000-0x0000000010038000-memory.dmp

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memory/3324-0-0x0000000000400000-0x000000000043F000-memory.dmp

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memory/3324-2-0x0000000000400000-0x000000000043F000-memory.dmp

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memory/5056-7-0x0000000000400000-0x000000000043F000-memory.dmp

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