farfli | 41459b80b0777b8b89ee5f3467846a8d5794791049a94f6663a89736688cee3f

Analysis

max time kernel
148s
max time network
139s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
10/08/2026, 08:22

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General

Target
2026-08-10_835c3b1ff1e5d5b11028c011c42c1171_coinminer_elex_wannacry.exe
Size 296KB
Sample260810-j92cgsvbme
SHA256 41459b80b0777b8b89ee5f3467846a8d5794791049a94f6663a89736688cee3f
MD5 835c3b1ff1e5d5b11028c011c42c1171
SHA1 c28a6f15be767396293af902b97f82f8fcbde7c5
SHA512 26f490334bb57d942aa795cafdeaf5f7539ab6bb1f0201ac48b5f4cd8ab8bb33a25c95debefd2da12b5b7db907b17814358f4950523cdcd7b49c5cd3912d28c0
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrO:ywLcCmuErglr73aAD+
TLSH
T151540282E502DF07EC2FC7B6813E5E291217AF521B705593D3C0B91E26B3682B63A0D9
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
behavioral2/memory/1004-13-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/1004-11-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/1004-15-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/1004-18-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/1004-19-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/1004-20-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/1004-21-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 7 IoCs

resource	yara_rule
behavioral2/memory/1004-13-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1004-11-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1004-15-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1004-18-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1004-19-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1004-20-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1004-21-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4240-0-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral2/memory/4240-2-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral2/files/0x000c000000019cc9-3.dat	UPX
behavioral2/memory/4160-6-0x0000000000400000-0x0000000000483000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
6	1004	rundll32.exe
8	1004	rundll32.exe
9	1004	rundll32.exe
10	1004	rundll32.exe
11	1004	rundll32.exe
12	1004	rundll32.exe
14	1004	rundll32.exe
15	1004	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4160	kszqcpd.exe

Executes dropped EXE 1 IoCs

pid	Process
4160	kszqcpd.exe

Loads dropped DLL 1 IoCs

pid	Process
1004	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-1-5-21-1738198120-2966725515-3980530802-1000\Software\Microsoft\Windows\CurrentVersion\Run\Wetor = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\uxtxllmnm\\knwhv.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)	\??\d:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	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
behavioral2/memory/4240-0-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral2/memory/4240-2-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral2/files/0x000c000000019cc9-3.dat	upx
behavioral2/memory/4160-6-0x0000000000400000-0x0000000000483000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	\??\c:\Program Files\uxtxllmnm\knwhv.dll	kszqcpd.exe
File opened for modification	\??\c:\Program Files\uxtxllmnm	kszqcpd.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
3088	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	kszqcpd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-10_835c3b1ff1e5d5b11028c011c42c1171_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
3088	cmd.exe
4836	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
4836	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1004	rundll32.exe
1004	rundll32.exe
1004	rundll32.exe
1004	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1004	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4240	2026-08-10_835c3b1ff1e5d5b11028c011c42c1171_coinminer_elex_wannacry.exe
4160	kszqcpd.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4240 wrote to memory of 3088	4240	2026-08-10_835c3b1ff1e5d5b11028c011c42c1171_coinminer_elex_wannacry.exe	89
PID 3088 wrote to memory of 4836	3088	cmd.exe	91
PID 3088 wrote to memory of 4160	3088	cmd.exe	92
PID 4160 wrote to memory of 1004	4160	kszqcpd.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-10_835c3b1ff1e5d5b11028c011c42c1171_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-10_835c3b1ff1e5d5b11028c011c42c1171_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4240
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\kszqcpd.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-10_835c3b1ff1e5d5b11028c011c42c1171_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:3088
- - 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:4836
- - C:\Users\Admin\AppData\Local\Temp\kszqcpd.exe
    C:\Users\Admin\AppData\Local\Temp\\kszqcpd.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-10_835c3b1ff1e5d5b11028c011c42c1171_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:4160
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\uxtxllmnm\knwhv.dll",GetProc C:\Users\Admin\AppData\Local\Temp\kszqcpd.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:1004

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

kszqcpd.exe

Path C:\Users\Admin\AppData\Local\Temp\kszqcpd.exe
Size 297KB
SHA256 2f33a250fe528ae56781640473b1cc1395511705bf2d41d9c1eb094bda949d8d
MD5 efc51eec48bfeb9ed08037fcc4b4d693
SHA1 482b433862c3781dc1b648aabd721e1b51138afb
SHA512 cbccae6f0e03c6a7b2f654d24b484b3691cb8701785a0f2662191f44362e9250f6da5d56952940b6abe4583f7ac0735f33f2c4302dfc6e9c346b53d8a5daec49
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrOQ:ywLcCmuErglr73aAD+v
TLSH
T13A540282E501DF07EC2FC7B6813E5E291217AF521B705597D3C4B91E26B3682B63E0D9
MD5 SHA1 SHA512 SSDEEP TLSH

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knwhv.dll

Path \??\c:\Program Files\uxtxllmnm\knwhv.dll
Size 218KB
SHA256 cc5882c2d18db83e95aa64a6c84d8245da73556c67d9143ddf3df5201e7c282a
MD5 cb752bf337dd2c53d88f7f4193c78e76
SHA1 abc98f2b3f8bf7be1b96243462036c81da20c243
SHA512 0c3922f3d790b155efe33e59220c9bc657b1ab54c451febf78d41be585fa886d7c54ee78018f9d2a431d91b0f8afa221b199154c900a7497ef8c1558c8ccc31e
SSDEEP 6144:KORxNwD2VOidhzeXwddDzLi5vOQEqscr0ZTJauytc:pnNwDTi3swddDiROXIW
TLSH
T11124124BCF983873C5223379597911A0B97252909FA1534D92E6D34FA072BA2CF7B531
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1004-15-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1004-9-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1004-10-0x0000000002D60000-0x0000000002D61000-memory.dmp

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memory/1004-13-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1004-11-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1004-16-0x0000000002D60000-0x0000000002D61000-memory.dmp

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memory/1004-18-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1004-19-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1004-20-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1004-21-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4160-6-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/4240-2-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/4240-0-0x0000000000400000-0x0000000000483000-memory.dmp

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