farfli | 622829101da290091c8440dac219576f6787be9732ea5230ae444848500fec70

Analysis

max time kernel
149s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
15/04/2026, 10:02

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General

Target
2026-04-15_2f4e2227f4a7168ccc5690522236939b_coinminer_elex_wannacry.exe
Size 406KB
Sample260415-l2rt7abv8k
SHA256 622829101da290091c8440dac219576f6787be9732ea5230ae444848500fec70
MD5 2f4e2227f4a7168ccc5690522236939b
SHA1 cbf39f6a4a5b8b37e16ead5c6293e8c961e46f86
SHA512 afbecaabb611e7fe866ddabf06bad5ac5c2546acb03446ca08322b36fdf36e2f6040b1cf91b64ccb59e5034fc8d0b314054535e77176ae8f536fc5a44ef5acf9
SSDEEP 12288:zdDU6g13sJd1fm/+yb3O2js82ydU/DdKum4O:zdE3sJd1fm/+yb3OYs84/JHdO
TLSH
T17194AF01E7C351D6DE82257081FA7376B3789A4D0F12CBE3BB68EE2E6E211D1953B119
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery farfli persistence spyware stealer

Malware Config

Signatures

Family: Farfli
Farfli is a Windows backdoor written in C++.
backdoor farfli

Detects Farfli Backdoor 4 IoCs

resource	yara_rule
behavioral1/memory/1704-14-0x0000000010000000-0x0000000010033000-memory.dmp	family_farfli
behavioral1/memory/1704-15-0x0000000010000000-0x0000000010033000-memory.dmp	family_farfli
behavioral1/memory/1704-19-0x0000000010000000-0x0000000010033000-memory.dmp	family_farfli
behavioral1/memory/1704-23-0x0000000010000000-0x0000000010033000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 4 IoCs

resource	yara_rule
behavioral1/memory/1704-14-0x0000000010000000-0x0000000010033000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1704-15-0x0000000010000000-0x0000000010033000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1704-19-0x0000000010000000-0x0000000010033000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1704-23-0x0000000010000000-0x0000000010033000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 9 IoCs

resource	yara_rule
behavioral1/memory/680-0-0x0000000000400000-0x0000000000471000-memory.dmp	UPX
behavioral1/memory/680-2-0x0000000000400000-0x0000000000471000-memory.dmp	UPX
behavioral1/files/0x0013000000024218-4.dat	UPX
behavioral1/memory/2216-10-0x0000000000400000-0x0000000000471000-memory.dmp	UPX
behavioral1/files/0x00080000000243e0-11.dat	UPX
behavioral1/memory/1704-14-0x0000000010000000-0x0000000010033000-memory.dmp	UPX
behavioral1/memory/1704-15-0x0000000010000000-0x0000000010033000-memory.dmp	UPX
behavioral1/memory/1704-19-0x0000000010000000-0x0000000010033000-memory.dmp	UPX
behavioral1/memory/1704-23-0x0000000010000000-0x0000000010033000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
2216	vmyapxv.exe

Executes dropped EXE 2 IoCs

pid	Process
2216	vmyapxv.exe
1704	cuw.exe

Loads dropped DLL 1 IoCs

pid	Process
1704	cuw.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-1-5-21-745935970-1373868228-562466063-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\VIEW = "c:\\Program Files\\pbqrc\\cuw.exe \"c:\\Program Files\\pbqrc\\cuwgu.dll\",Viewer"	cuw.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)	\??\t:	cuw.exe
File opened (read-only)	\??\u:	cuw.exe
File opened (read-only)	\??\x:	cuw.exe
File opened (read-only)	\??\z:	cuw.exe
File opened (read-only)	\??\h:	cuw.exe
File opened (read-only)	\??\o:	cuw.exe
File opened (read-only)	\??\w:	cuw.exe
File opened (read-only)	\??\b:	cuw.exe
File opened (read-only)	\??\g:	cuw.exe
File opened (read-only)	\??\j:	cuw.exe
File opened (read-only)	\??\p:	cuw.exe
File opened (read-only)	\??\s:	cuw.exe
File opened (read-only)	\??\y:	cuw.exe
File opened (read-only)	\??\a:	cuw.exe
File opened (read-only)	\??\e:	cuw.exe
File opened (read-only)	\??\i:	cuw.exe
File opened (read-only)	\??\l:	cuw.exe
File opened (read-only)	\??\n:	cuw.exe
File opened (read-only)	\??\q:	cuw.exe
File opened (read-only)	\??\r:	cuw.exe
File opened (read-only)	\??\v:	cuw.exe
File opened (read-only)	\??\k:	cuw.exe
File opened (read-only)	\??\m:	cuw.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	cuw.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\pbqrc	vmyapxv.exe
File created	\??\c:\Program Files\pbqrc\cuwgu.dll	vmyapxv.exe
File created	\??\c:\Program Files\pbqrc\cuw.exe	vmyapxv.exe
File opened for modification	\??\c:\Program Files\pbqrc\cuw.exe	vmyapxv.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	vmyapxv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cuw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-15_2f4e2227f4a7168ccc5690522236939b_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

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
3876	cmd.exe
5020	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	cuw.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	cuw.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
5020	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1704	cuw.exe
1704	cuw.exe
1704	cuw.exe
1704	cuw.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1704	cuw.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
680	2026-04-15_2f4e2227f4a7168ccc5690522236939b_coinminer_elex_wannacry.exe
2216	vmyapxv.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 680 wrote to memory of 3876	680	2026-04-15_2f4e2227f4a7168ccc5690522236939b_coinminer_elex_wannacry.exe	85
PID 3876 wrote to memory of 5020	3876	cmd.exe	87
PID 3876 wrote to memory of 2216	3876	cmd.exe	88
PID 2216 wrote to memory of 1704	2216	vmyapxv.exe	89

C:\Users\Admin\AppData\Local\Temp\2026-04-15_2f4e2227f4a7168ccc5690522236939b_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-15_2f4e2227f4a7168ccc5690522236939b_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:680
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\vmyapxv.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-15_2f4e2227f4a7168ccc5690522236939b_coinminer_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3876
- - 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:5020
- - C:\Users\Admin\AppData\Local\Temp\vmyapxv.exe
    C:\Users\Admin\AppData\Local\Temp\\vmyapxv.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-15_2f4e2227f4a7168ccc5690522236939b_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:2216
  - - \??\c:\Program Files\pbqrc\cuw.exe
      "c:\Program Files\pbqrc\cuw.exe" "c:\Program Files\pbqrc\cuwgu.dll",Viewer C:\Users\Admin\AppData\Local\Temp\vmyapxv.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:1704

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

cuw.exe

Path C:\Program Files\pbqrc\cuw.exe
Size 60KB
SHA256 6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910
MD5 889b99c52a60dd49227c5e485a016679
SHA1 8fa889e456aa646a4d0a4349977430ce5fa5e2d7
SHA512 08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641
SSDEEP 1536:H9ykYCTdiHQKrFXmw2RQln5IUmDjoX6+:HlMHprF2nRQln5I
TLSH
T127532AC2FA00C171D4A7563019778F1A5766AC13DB728ACB94B0B4A41EB3291AD3E5FF
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

vmyapxv.exe

Path C:\Users\Admin\AppData\Local\Temp\vmyapxv.exe
Size 407KB
SHA256 388f4c57e4971dc9728d507ff4c6365a95705c2eedfb63e109d6b22d30f0f82a
MD5 eca09c8c73c82e07053ec9b8e569bd0f
SHA1 b47ab2bec2793e5d321cd35ea09d74268b493470
SHA512 633564e349f6a2e06efe59c470c02c84e3208739a74d055146cc4a63bd28ddb28ad1d185c1767c1a85d48ae9cdcbc6b6875e28067ea186bdeb875f2f8c9587cc
SSDEEP 12288:zdDU6g13sJd1fm/+yb3O2js82ydU/DdKum4:zdE3sJd1fm/+yb3OYs84/JHd
TLSH
T18294AF01E7C351D6DE82257081FA7376B3789A4D0F12CBE3BB68EE2E6E211D1953B119
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

cuwgu.dll

Path \??\c:\Program Files\pbqrc\cuwgu.dll
Size 89KB
SHA256 3f2c8957b74c4b49a0ebf29e4b4523e6de2846c5adc76da05455dfd0c7045867
MD5 82020c08cd05f0b7d5018ca67c7f82cb
SHA1 e4462e4860c0ef07c4f31e1b2eedd334639fc7f0
SHA512 6712724ddae350aef0e2b07fdc0d753c2b0c82efbe3878b59b6456ea5ef14882d819cb61ab14d26d6dc52a74e9cdca3ad095cde1b7f73f667fa84fbb7d02e092
SSDEEP 1536:XHXqO6ZG03eyenOj9lgA/PObuTMT5NMCfL7ojaZf5aZlBlGN:M1uF6Feu2NlQOBcGN
TLSH
T1DA9302C45669CD8BCCD87072727FAA4EE631D4CCB941ACB34A5E13A31A366F3D05A705
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/680-0-0x0000000000400000-0x0000000000471000-memory.dmp

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memory/680-2-0x0000000000400000-0x0000000000471000-memory.dmp

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memory/1704-14-0x0000000010000000-0x0000000010033000-memory.dmp

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memory/1704-15-0x0000000010000000-0x0000000010033000-memory.dmp

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memory/1704-16-0x0000000002B90000-0x0000000002BEF000-memory.dmp

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memory/1704-19-0x0000000010000000-0x0000000010033000-memory.dmp

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memory/1704-23-0x0000000010000000-0x0000000010033000-memory.dmp

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memory/2216-10-0x0000000000400000-0x0000000000471000-memory.dmp

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