farfli | f387de2ac507efed62b46172d4e526dabcb4f8013ec6d8a077c8874c8b637dec

Analysis

max time kernel
148s
max time network
151s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
17/10/2026, 17:13

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General

Target
2026-10-16_55b29b30484543eaefd5e56e901a5d43_coinminer_elex_wannacry.exe
Size 412KB
Sample261017-vrld4att4r
SHA256 f387de2ac507efed62b46172d4e526dabcb4f8013ec6d8a077c8874c8b637dec
MD5 55b29b30484543eaefd5e56e901a5d43
SHA1 634c6322479d7b7113e1d1ae0a48147c202a260a
SHA512 77f577780248fc71a3dd2ab0aaac3cf04aaabbb447a50432e0174f98c692ed421a925e35b675a97c6b5522fea737b75f2934a5d60e5d3efa8cce8d810092f709
SSDEEP 6144:qKgGmTBsuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F19S3:UGmTau+mMC4ITJE8dfSJ/F1s
TLSH
T14B94D02272D08BA3C1866032CD66E67CD3E5CD689C705E3773E9F65DEE36941423A274
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit defense_evasion discovery execution 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
behavioral2/memory/404-9-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral2/memory/404-11-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli
behavioral2/memory/404-13-0x0000000010000000-0x0000000010067000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/404-9-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/404-11-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/404-13-0x0000000010000000-0x0000000010067000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2816-0-0x0000000000400000-0x0000000000492000-memory.dmp	UPX
behavioral2/memory/2816-2-0x0000000000400000-0x0000000000492000-memory.dmp	UPX
behavioral2/files/0x000500000000053e-3.dat	UPX
behavioral2/memory/3316-6-0x0000000000400000-0x0000000000492000-memory.dmp	UPX

Badlisted process makes network request 4 IoCs

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

flow	pid	Process
7	404	rundll32.exe
10	404	rundll32.exe
11	404	rundll32.exe
12	404	rundll32.exe

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
3316	utcecab.exe

Executes dropped EXE 1 IoCs

pid	Process
3316	utcecab.exe

Loads dropped DLL 1 IoCs

pid	Process
404	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-1-5-21-1262770251-41185387-1005173349-1000\Software\Microsoft\Windows\CurrentVersion\Run\D3D = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\tclxk\\jbwzm.dll\",InitEngine"	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)	\??\z:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
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)	\??\p:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	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)	\??\l:	rundll32.exe
File opened (read-only)	\??\r:	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

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\tclxk	utcecab.exe
File created	\??\c:\Program Files\tclxk\jbwzm.dll	utcecab.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
5744	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	rundll32.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	rundll32.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	2026-10-16_55b29b30484543eaefd5e56e901a5d43_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	utcecab.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
5744	cmd.exe
4128	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
4128	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
404	rundll32.exe
404	rundll32.exe
404	rundll32.exe
404	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	404	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2816	2026-10-16_55b29b30484543eaefd5e56e901a5d43_coinminer_elex_wannacry.exe
3316	utcecab.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2816 wrote to memory of 5744	2816	2026-10-16_55b29b30484543eaefd5e56e901a5d43_coinminer_elex_wannacry.exe	91
PID 5744 wrote to memory of 4128	5744	cmd.exe	93
PID 5744 wrote to memory of 3316	5744	cmd.exe	94
PID 3316 wrote to memory of 404	3316	utcecab.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-10-16_55b29b30484543eaefd5e56e901a5d43_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-16_55b29b30484543eaefd5e56e901a5d43_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2816
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\utcecab.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-16_55b29b30484543eaefd5e56e901a5d43_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:5744
- - 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:4128
- - C:\Users\Admin\AppData\Local\Temp\utcecab.exe
    C:\Users\Admin\AppData\Local\Temp\\utcecab.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-16_55b29b30484543eaefd5e56e901a5d43_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:3316
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\tclxk\jbwzm.dll",InitEngine C:\Users\Admin\AppData\Local\Temp\utcecab.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)
      Reads the TCP/IP host and domain name from the registry
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:404

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

Indicator Removal

T1070

File Deletion

T1070.004

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

utcecab.exe

Path C:\Users\Admin\AppData\Local\Temp\utcecab.exe
Size 412KB
SHA256 5c45e10303259f5d05d72fdc86c4de16236027a4c2530bd5aa7ea9289f19dc23
MD5 755e5c1b032c26c19947cb848e4f5d5c
SHA1 fe4b1b6e5f2488e8174d9da0f6c9bc1ff162dbd0
SHA512 d0ada29934d926870ee176490d6dc2a1842a08ff9e99c1ec87612875b86b6adc08831d8b58dfe66eba2b588f4916fb21c7e24f10dcb127008206caa47f692707
SSDEEP 6144:qKgGmTBsuFIsBMkVuq4nITJJVn0wOa7sNvYfSkk/F19S:UGmTau+mMC4ITJE8dfSJ/F1
TLSH
T17D94D02272D08BA3C1866032CDA6E67CD3E5CD689C705E3773E9F65DEE36941423A274
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

jbwzm.dll

Path \??\c:\Program Files\tclxk\jbwzm.dll
Size 176KB
SHA256 bf88d4630959eef5cd536e1fd34eaac3d7cc19f35de55f05c3b41e9a1bff90bf
MD5 20b75339d38b5d17b6184899aead4e11
SHA1 0f1659f1970edf03fc03c6444824f2232e9d8848
SHA512 d407f6360d4409f1cf9f7d77e19517428dcfaa012b5d01afd4c6ad6723c6cea7031f01b5b41ca7e942b4f8217fbcacc6bb5bd2628cd267641a86cff88471fac8
SSDEEP 3072:KiDJQVl82dm+NBiPAaHDb0gL/CyGbEPVMnY0RVjatbmKb6DWSFoocc:1Jv2tOItshGYdMnYYVjasKbOWSFofc
TLSH
T19D041261862D1C34D087B7717B05920DF6B452A49179CBD3F7B8AF2B3D12AEA805E353
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/404-9-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/404-12-0x000000001005A000-0x000000001005B000-memory.dmp

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memory/404-11-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/404-13-0x0000000010000000-0x0000000010067000-memory.dmp

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memory/2816-0-0x0000000000400000-0x0000000000492000-memory.dmp

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memory/2816-2-0x0000000000400000-0x0000000000492000-memory.dmp

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memory/3316-6-0x0000000000400000-0x0000000000492000-memory.dmp

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