farfli | 017246b03d2dda773df7e846c016861adf2cb62dbbc8d3a74842483255ef032d

Analysis

max time kernel
148s
max time network
147s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
04/08/2026, 16:41

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General

Target
2026-08-04_10e17a7de8764da203b9f00918af9289_coinminer_elex_wannacry.exe
Size 311KB
Sample260804-t7dhrasxfs
SHA256 017246b03d2dda773df7e846c016861adf2cb62dbbc8d3a74842483255ef032d
MD5 10e17a7de8764da203b9f00918af9289
SHA1 ae430b22d18dbfd4c47503ada4d4d51eae711e85
SHA512 a1b64632dc7da15072ce7c2055dd447ee313a473ff30fc9f6dd364b4a6f8e5084f7fea65869d1a9c3401c938e0433beb4067ca5e574cdcc631de0441ba645419
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrOa:ywLcCmuErglr73aAD+/
TLSH
T1C164F142D511CF47FC2FCAB6823E1E355317AE553B205693D3C8BA1F65B2B42A63A0D8
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/2316-12-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/2316-9-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/2316-15-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/2316-17-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/2316-18-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/2316-19-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/2316-22-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 7 IoCs

resource	yara_rule
behavioral2/memory/2316-12-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2316-9-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2316-15-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2316-17-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2316-18-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2316-19-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2316-22-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4972-0-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral2/memory/4972-2-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral2/files/0x000c00000001af5c-3.dat	UPX
behavioral2/memory/3360-6-0x0000000000400000-0x0000000000483000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
4	2316	rundll32.exe
10	2316	rundll32.exe
11	2316	rundll32.exe
12	2316	rundll32.exe
13	2316	rundll32.exe
14	2316	rundll32.exe
17	2316	rundll32.exe
18	2316	rundll32.exe

Deletes itself 1 IoCs

pid	Process
3360	khvgm.exe

Executes dropped EXE 1 IoCs

pid	Process
3360	khvgm.exe

Loads dropped DLL 1 IoCs

pid	Process
2316	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\\xvdphf\\ukdhk.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)	\??\i:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\w:	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/4972-0-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral2/memory/4972-2-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral2/files/0x000c00000001af5c-3.dat	upx
behavioral2/memory/3360-6-0x0000000000400000-0x0000000000483000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\xvdphf	khvgm.exe
File created	\??\c:\Program Files\xvdphf\ukdhk.dll	khvgm.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
472	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	2026-08-04_10e17a7de8764da203b9f00918af9289_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	khvgm.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
472	cmd.exe
4480	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
4480	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2316	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4972	2026-08-04_10e17a7de8764da203b9f00918af9289_coinminer_elex_wannacry.exe
3360	khvgm.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4972 wrote to memory of 472	4972	2026-08-04_10e17a7de8764da203b9f00918af9289_coinminer_elex_wannacry.exe	89
PID 472 wrote to memory of 4480	472	cmd.exe	91
PID 472 wrote to memory of 3360	472	cmd.exe	92
PID 3360 wrote to memory of 2316	3360	khvgm.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-04_10e17a7de8764da203b9f00918af9289_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-04_10e17a7de8764da203b9f00918af9289_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4972
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\khvgm.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-04_10e17a7de8764da203b9f00918af9289_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:472
- - 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:4480
- - C:\Users\Admin\AppData\Local\Temp\khvgm.exe
    C:\Users\Admin\AppData\Local\Temp\\khvgm.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-04_10e17a7de8764da203b9f00918af9289_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:3360
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\xvdphf\ukdhk.dll",GetProc C:\Users\Admin\AppData\Local\Temp\khvgm.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:2316

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

khvgm.exe

Path C:\Users\Admin\AppData\Local\Temp\khvgm.exe
Size 312KB
SHA256 bb779108113a31c72d933b6ea68f1b851c0e53b87de927c44345ddeaa54794c7
MD5 72e0651758cba2de6671c8866fdbd911
SHA1 a40dbbeaa86c4523c9f18defde296b9b5001ae82
SHA512 3ab31c192386513484a0328e29e7e1aed09b84a239381457081f0451fb2084b0b070659191c5ffaf5deac299937d228689a30ea34aa8bc4177748b9ef4c4ebbd
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrOG:ywLcCmuErglr73aAD+b
TLSH
T1AD64F141D511CF47FC2FCAB6823E1E355317AE553B2056A3D3C8BA1F65B2B42A63A0D8
MD5 SHA1 SHA512 SSDEEP TLSH

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ukdhk.dll

Path \??\c:\Program Files\xvdphf\ukdhk.dll
Size 218KB
SHA256 724f3da98015cadb864c0606d5eb783bb0b40768dd1e0930cb6f164d347c4e73
MD5 032a616631d6621fbeb31493bc5dce3d
SHA1 3d25d8461cbe9fde1ab7b130be6c6ba53080c084
SHA512 e60aa454e1c1ecbb6b8d85e78684349519775b4e7acb38a3def3075bf9614d8d8339a6a60985dff3506096c5471c072993ba02b49497c5b41c20d4599dae460b
SSDEEP 6144:KORxNwD2VOidhzeXwddDzLi5vOQEqscr0ZTJauytH:pnNwDTi3swddDiROXIV
TLSH
T12B24128BCF983873C5223379597951A0B9324290AFA1530D92E6D34FA072BA2CF7B531
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2316-15-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/2316-12-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/2316-14-0x00000000026E0000-0x00000000026E1000-memory.dmp

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memory/2316-13-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/2316-9-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/2316-17-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/2316-18-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/2316-19-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/2316-22-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/3360-6-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/4972-2-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/4972-0-0x0000000000400000-0x0000000000483000-memory.dmp

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