farfli | 76820a79908ca94afe1ed8056d1d60980c5e7b11e2b33be562584c2657c07917

Analysis

max time kernel
149s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
05/07/2026, 04:47

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General

Target
2026-07-05_caaf6ffbee226bec078bf6e24fbaee1d_coinminer_elex_wannacry.exe
Size 401KB
Sample260705-feptesds5m
SHA256 76820a79908ca94afe1ed8056d1d60980c5e7b11e2b33be562584c2657c07917
MD5 caaf6ffbee226bec078bf6e24fbaee1d
SHA1 c038a63b0b6564c7ae3246f2f37ae2554c25d6c0
SHA512 f41f34e10765ab5f7d92bbad330d4bde2c9613b6751f30bad428d5e93ebd82280d34c120e0c654f5db06c36c8836c8d9daf25f1cab641a176df8fe68b96f6bd8
SSDEEP 12288:zdDU6g13sJd1fm/+yb3O2js82ydU/DdKumH:zdE3sJd1fm/+yb3OYs84/JH6
TLSH
T16C94AF01E7C351D6DE8225B081FA7376B3789A4D0F12C7E3BB68EE2E6E211D1953B119
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 3 IoCs

resource	yara_rule
behavioral1/memory/3480-15-0x0000000010000000-0x0000000010033000-memory.dmp	family_farfli
behavioral1/memory/3480-17-0x0000000010000000-0x0000000010033000-memory.dmp	family_farfli
behavioral1/memory/3480-19-0x0000000010000000-0x0000000010033000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral1/memory/3480-15-0x0000000010000000-0x0000000010033000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/3480-17-0x0000000010000000-0x0000000010033000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/3480-19-0x0000000010000000-0x0000000010033000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 9 IoCs

resource	yara_rule
behavioral1/memory/1800-0-0x0000000000400000-0x0000000000471000-memory.dmp	UPX
behavioral1/memory/1800-2-0x0000000000400000-0x0000000000471000-memory.dmp	UPX
behavioral1/files/0x001400000002433a-4.dat	UPX
behavioral1/memory/3220-10-0x0000000000400000-0x0000000000471000-memory.dmp	UPX
behavioral1/files/0x00080000000244a0-11.dat	UPX
behavioral1/memory/3480-14-0x0000000010000000-0x0000000010033000-memory.dmp	UPX
behavioral1/memory/3480-15-0x0000000010000000-0x0000000010033000-memory.dmp	UPX
behavioral1/memory/3480-17-0x0000000010000000-0x0000000010033000-memory.dmp	UPX
behavioral1/memory/3480-19-0x0000000010000000-0x0000000010033000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
3220	vtbpm.exe

Executes dropped EXE 2 IoCs

pid	Process
3220	vtbpm.exe
3480	tvc.exe

Loads dropped DLL 1 IoCs

pid	Process
3480	tvc.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-1-5-21-1788976790-1541110888-1636651838-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\VIEW = "c:\\Program Files\\rezsn\\tvc.exe \"c:\\Program Files\\rezsn\\tvchr.dll\",Viewer"	tvc.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)	\??\b:	tvc.exe
File opened (read-only)	\??\h:	tvc.exe
File opened (read-only)	\??\l:	tvc.exe
File opened (read-only)	\??\m:	tvc.exe
File opened (read-only)	\??\n:	tvc.exe
File opened (read-only)	\??\s:	tvc.exe
File opened (read-only)	\??\w:	tvc.exe
File opened (read-only)	\??\x:	tvc.exe
File opened (read-only)	\??\g:	tvc.exe
File opened (read-only)	\??\p:	tvc.exe
File opened (read-only)	\??\r:	tvc.exe
File opened (read-only)	\??\z:	tvc.exe
File opened (read-only)	\??\a:	tvc.exe
File opened (read-only)	\??\e:	tvc.exe
File opened (read-only)	\??\q:	tvc.exe
File opened (read-only)	\??\t:	tvc.exe
File opened (read-only)	\??\v:	tvc.exe
File opened (read-only)	\??\i:	tvc.exe
File opened (read-only)	\??\j:	tvc.exe
File opened (read-only)	\??\k:	tvc.exe
File opened (read-only)	\??\o:	tvc.exe
File opened (read-only)	\??\u:	tvc.exe
File opened (read-only)	\??\y:	tvc.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	tvc.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	\??\c:\Program Files\rezsn\tvchr.dll	vtbpm.exe
File created	\??\c:\Program Files\rezsn\tvc.exe	vtbpm.exe
File opened for modification	\??\c:\Program Files\rezsn\tvc.exe	vtbpm.exe
File opened for modification	\??\c:\Program Files\rezsn	vtbpm.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	2026-07-05_caaf6ffbee226bec078bf6e24fbaee1d_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	vtbpm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tvc.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
1104	cmd.exe
4976	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	tvc.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	tvc.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4976	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3480	tvc.exe
3480	tvc.exe
3480	tvc.exe
3480	tvc.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3480	tvc.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1800	2026-07-05_caaf6ffbee226bec078bf6e24fbaee1d_coinminer_elex_wannacry.exe
3220	vtbpm.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1800 wrote to memory of 1104	1800	2026-07-05_caaf6ffbee226bec078bf6e24fbaee1d_coinminer_elex_wannacry.exe	84
PID 1104 wrote to memory of 4976	1104	cmd.exe	86
PID 1104 wrote to memory of 3220	1104	cmd.exe	87
PID 3220 wrote to memory of 3480	3220	vtbpm.exe	88

C:\Users\Admin\AppData\Local\Temp\2026-07-05_caaf6ffbee226bec078bf6e24fbaee1d_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-05_caaf6ffbee226bec078bf6e24fbaee1d_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1800
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\vtbpm.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-05_caaf6ffbee226bec078bf6e24fbaee1d_coinminer_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1104
- - 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:4976
- - C:\Users\Admin\AppData\Local\Temp\vtbpm.exe
    C:\Users\Admin\AppData\Local\Temp\\vtbpm.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-05_caaf6ffbee226bec078bf6e24fbaee1d_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:3220
  - - \??\c:\Program Files\rezsn\tvc.exe
      "c:\Program Files\rezsn\tvc.exe" "c:\Program Files\rezsn\tvchr.dll",Viewer C:\Users\Admin\AppData\Local\Temp\vtbpm.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:3480

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

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Downloads

tvc.exe

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

Submit Download

vtbpm.exe

Path C:\Users\Admin\AppData\Local\Temp\vtbpm.exe
Size 401KB
SHA256 013a1bb08996a4898fb3a421e79930cece15ef9752a8058680fbdb3abb078a7f
MD5 840cd31ad27b10641a22ff4fd01f2f1b
SHA1 4f67c5b534570d193bc6f32e66819c4b9edd6020
SHA512 c642e42bcdbf3f35b6a36e43540c7a9ca3f929af51bdf2a3ea99ab3080263bdf7f74de0ede17bc561675194cd3cec643262385c5f94c945d42858fd6a0374eed
SSDEEP 12288:zdDU6g13sJd1fm/+yb3O2js82ydU/DdKumHy:zdE3sJd1fm/+yb3OYs84/JH6y
TLSH
T18994AF01E7C351D6DE8225B081FA7376B3789A4D0F12C7E3BB68EE2E6E211D1953B119
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

tvchr.dll

Path \??\c:\Program Files\rezsn\tvchr.dll
Size 89KB
SHA256 c9822984acc7d33ad8478fd8fb74aca99a8e2726d9be0e699fedd7d00411a1fb
MD5 ae28a1d0537354b025bc4368fecb605e
SHA1 ee4dce5a9683ebebd28f17beff70f674bfc6af97
SHA512 62ffb5c49ffd463e74b5626733a4458f681eeae0936acc8c62c3a4ae7e5c176fb3f89a096ea46d6b1842e4f398710c086d5a0009a392c36a7281245604bfc160
SSDEEP 1536:XHXqO6ZG03eyenOj9lgA/PObuTMT5NMCfL7ojaZf5aZlBlGm:M1uF6Feu2NlQOBcGm
TLSH
T1779302C45665CD8BCCD87072727FAA4EE631C48CB941ACB34A5E13A31A36AE3D41A705
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1800-0-0x0000000000400000-0x0000000000471000-memory.dmp

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memory/1800-2-0x0000000000400000-0x0000000000471000-memory.dmp

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memory/3220-10-0x0000000000400000-0x0000000000471000-memory.dmp

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memory/3480-14-0x0000000010000000-0x0000000010033000-memory.dmp

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memory/3480-15-0x0000000010000000-0x0000000010033000-memory.dmp

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memory/3480-17-0x0000000010000000-0x0000000010033000-memory.dmp

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memory/3480-19-0x0000000010000000-0x0000000010033000-memory.dmp

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