farfli | 485c43836b23d6c93aabad4ea49e5531487d19182e3d901f3a67079fa94333c9

Analysis

max time kernel
148s
max time network
137s
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, 09:49

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General

Target
2026-08-09_cc107c916dfd30cb539f7af4f5df76e2_coinminer_elex_wannacry.exe
Size 312KB
Sample260809-ltke5syvft
SHA256 485c43836b23d6c93aabad4ea49e5531487d19182e3d901f3a67079fa94333c9
MD5 cc107c916dfd30cb539f7af4f5df76e2
SHA1 8da22f5953d1aa008eab3a15609778c1637f8b08
SHA512 b57eb79c23c29d28af088c987470aa5643d0262c9a551c352bbd0b85e014283918256dd1a6cdc05310666286a225614db59a0f8166ab98894dc20765026c7c77
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrOp:ywLcCmuErglr73aAD++
TLSH
T1A964F142D511CF47FC2FCAB6823E4E355317AE553B205693D3C8BA1F65B2B42A63A0D8
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/5808-10-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/5808-12-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/5808-15-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/5808-17-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/5808-18-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/5808-19-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/5808-20-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 7 IoCs

resource	yara_rule
behavioral2/memory/5808-10-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5808-12-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5808-15-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5808-17-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5808-18-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5808-19-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5808-20-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4304-0-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral2/memory/4304-2-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral2/files/0x000f00000001b1d0-3.dat	UPX
behavioral2/memory/4152-6-0x0000000000400000-0x0000000000483000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
5	5808	rundll32.exe
8	5808	rundll32.exe
9	5808	rundll32.exe
10	5808	rundll32.exe
12	5808	rundll32.exe
15	5808	rundll32.exe
16	5808	rundll32.exe
18	5808	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4152	lcfbnb.exe

Executes dropped EXE 1 IoCs

pid	Process
4152	lcfbnb.exe

Loads dropped DLL 1 IoCs

pid	Process
5808	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\\otrwrl\\xqequ.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)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\v:	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/4304-0-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral2/memory/4304-2-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral2/files/0x000f00000001b1d0-3.dat	upx
behavioral2/memory/4152-6-0x0000000000400000-0x0000000000483000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\otrwrl	lcfbnb.exe
File created	\??\c:\Program Files\otrwrl\xqequ.dll	lcfbnb.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
5896	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	2026-08-09_cc107c916dfd30cb539f7af4f5df76e2_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	lcfbnb.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
5896	cmd.exe
1992	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
1992	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5808	rundll32.exe
5808	rundll32.exe
5808	rundll32.exe
5808	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5808	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4304	2026-08-09_cc107c916dfd30cb539f7af4f5df76e2_coinminer_elex_wannacry.exe
4152	lcfbnb.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4304 wrote to memory of 5896	4304	2026-08-09_cc107c916dfd30cb539f7af4f5df76e2_coinminer_elex_wannacry.exe	89
PID 5896 wrote to memory of 1992	5896	cmd.exe	91
PID 5896 wrote to memory of 4152	5896	cmd.exe	92
PID 4152 wrote to memory of 5808	4152	lcfbnb.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-09_cc107c916dfd30cb539f7af4f5df76e2_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-09_cc107c916dfd30cb539f7af4f5df76e2_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4304
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\lcfbnb.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-09_cc107c916dfd30cb539f7af4f5df76e2_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:5896
- - 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:1992
- - C:\Users\Admin\AppData\Local\Temp\lcfbnb.exe
    C:\Users\Admin\AppData\Local\Temp\\lcfbnb.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-09_cc107c916dfd30cb539f7af4f5df76e2_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:4152
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\otrwrl\xqequ.dll",GetProc C:\Users\Admin\AppData\Local\Temp\lcfbnb.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:5808

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

lcfbnb.exe

Path C:\Users\Admin\AppData\Local\Temp\lcfbnb.exe
Size 313KB
SHA256 ae9629af89a35bbd9ad0856e2597b663176898f7217a070e465a7a55b5531925
MD5 73fddad483ead3dbb2127ae6db9a1262
SHA1 6ae603910364a42857b23e01320ef39761f04b72
SHA512 81e57014cc9e3543b124351353c3dc9788883b8fd3c813853c09b61dfbed74f4905338ad58789bc21e46095f5400ea1117e75606a9ebc710fc0ad9b4b6fad6cd
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrO:ywLcCmuErglr73aAD+
TLSH
T13E64F142D511CF47FC2FCAB6823E4E355317AE553B205693D3C8BA1F65B2B42A63A0D8
MD5 SHA1 SHA512 SSDEEP TLSH

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xqequ.dll

Path \??\c:\Program Files\otrwrl\xqequ.dll
Size 218KB
SHA256 65981b842aec06d73d3f12e26153b6d1d053c26fb094691ee12dd0803ea6d1b0
MD5 0bdf074100102c0f828ba79c122db441
SHA1 2aeb108235fb8269db17df4adc0fc3d7129f06fc
SHA512 e3fd5ebd7e9896c9c9c78cc2e718cb95cf5617ce39527240c565f79ed9e9d608034ed04c7dba3f5aeac0faa3af48670be29827471e04f848b8d726adb126387f
SSDEEP 6144:KORxNwD2VOidhzeXwddDzLi5vOQEqscr0ZTJauyto:pnNwDTi3swddDiROXIa
TLSH
T12524128BCF983873C5223379597951A0B9725290AFA1530DD2E6D34FA072BA2CF7B531
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/4152-6-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/4304-0-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/4304-2-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/5808-10-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/5808-9-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/5808-12-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/5808-14-0x0000000000C40000-0x0000000000C41000-memory.dmp

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memory/5808-15-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/5808-17-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/5808-18-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/5808-19-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/5808-20-0x0000000010000000-0x0000000010058000-memory.dmp

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