farfli | 893509767d0679e0403ab374c17de342dcc348be6a690a9ac8915af71846474a

Analysis

max time kernel
150s
max time network
142s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260710-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
29/07/2026, 06:29

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General

Target
2026-07-29_d1dbdf36370d548c47b33d24e4ecf7ef_coinminer_elex_wannacry.exe
Size 401KB
Sample260729-g9bqqaxalg
SHA256 893509767d0679e0403ab374c17de342dcc348be6a690a9ac8915af71846474a
MD5 d1dbdf36370d548c47b33d24e4ecf7ef
SHA1 a011af5773f65434e2a1eb5f68d8f3e31115c75e
SHA512 b4f676a67ddc6857f3f9448ebf91907220f5673916df0f82d63aa2862ee4d2866e60df7275f8f04df66864e93e004de522994a8f93a18c9d0e6820b45fdec1cf
SSDEEP 12288:zdDU6g13sJd1fm/+yb3O2js82ydU/DdKumH:zdE3sJd1fm/+yb3OYs84/JH6
TLSH
T19A94AF01E6C741D6DE8225B081FA7377B3789A4D0F12C7E3BB68EE2E6E211D1953B119
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit 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/4640-11-0x0000000010000000-0x0000000010033000-memory.dmp	family_farfli
behavioral2/memory/4640-13-0x0000000010000000-0x0000000010033000-memory.dmp	family_farfli
behavioral2/memory/4640-16-0x0000000010000000-0x0000000010033000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/4640-11-0x0000000010000000-0x0000000010033000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4640-13-0x0000000010000000-0x0000000010033000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4640-16-0x0000000010000000-0x0000000010033000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 9 IoCs

resource	yara_rule
behavioral2/memory/2996-0-0x0000000000400000-0x0000000000471000-memory.dmp	UPX
behavioral2/memory/2996-2-0x0000000000400000-0x0000000000471000-memory.dmp	UPX
behavioral2/files/0x000800000000082a-3.dat	UPX
behavioral2/memory/2028-7-0x0000000000400000-0x0000000000471000-memory.dmp	UPX
behavioral2/files/0x000e00000001c545-8.dat	UPX
behavioral2/memory/4640-10-0x0000000010000000-0x0000000010033000-memory.dmp	UPX
behavioral2/memory/4640-11-0x0000000010000000-0x0000000010033000-memory.dmp	UPX
behavioral2/memory/4640-13-0x0000000010000000-0x0000000010033000-memory.dmp	UPX
behavioral2/memory/4640-16-0x0000000010000000-0x0000000010033000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
2028	zavsx.exe

Executes dropped EXE 2 IoCs

pid	Process
2028	zavsx.exe
4640	mbcmptz.exe

Loads dropped DLL 1 IoCs

pid	Process
4640	mbcmptz.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-1-5-21-2301830172-776172150-2531349243-1000\Software\Microsoft\Windows\CurrentVersion\Run\VIEW = "c:\\Program Files\\zeijy\\mbcmptz.exe \"c:\\Program Files\\zeijy\\mbcmptz.dll\",Viewer"	mbcmptz.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:	mbcmptz.exe
File opened (read-only)	\??\i:	mbcmptz.exe
File opened (read-only)	\??\j:	mbcmptz.exe
File opened (read-only)	\??\a:	mbcmptz.exe
File opened (read-only)	\??\n:	mbcmptz.exe
File opened (read-only)	\??\o:	mbcmptz.exe
File opened (read-only)	\??\q:	mbcmptz.exe
File opened (read-only)	\??\t:	mbcmptz.exe
File opened (read-only)	\??\x:	mbcmptz.exe
File opened (read-only)	\??\b:	mbcmptz.exe
File opened (read-only)	\??\h:	mbcmptz.exe
File opened (read-only)	\??\l:	mbcmptz.exe
File opened (read-only)	\??\m:	mbcmptz.exe
File opened (read-only)	\??\p:	mbcmptz.exe
File opened (read-only)	\??\r:	mbcmptz.exe
File opened (read-only)	\??\s:	mbcmptz.exe
File opened (read-only)	\??\u:	mbcmptz.exe
File opened (read-only)	\??\d:	mbcmptz.exe
File opened (read-only)	\??\g:	mbcmptz.exe
File opened (read-only)	\??\k:	mbcmptz.exe
File opened (read-only)	\??\v:	mbcmptz.exe
File opened (read-only)	\??\w:	mbcmptz.exe
File opened (read-only)	\??\y:	mbcmptz.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	mbcmptz.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\zeijy	zavsx.exe
File created	\??\c:\Program Files\zeijy\mbcmptz.dll	zavsx.exe
File created	\??\c:\Program Files\zeijy\mbcmptz.exe	zavsx.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
3200	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	zavsx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mbcmptz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-07-29_d1dbdf36370d548c47b33d24e4ecf7ef_coinminer_elex_wannacry.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
3200	cmd.exe
2572	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	mbcmptz.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	mbcmptz.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2572	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4640	mbcmptz.exe
4640	mbcmptz.exe
4640	mbcmptz.exe
4640	mbcmptz.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4640	mbcmptz.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2996	2026-07-29_d1dbdf36370d548c47b33d24e4ecf7ef_coinminer_elex_wannacry.exe
2028	zavsx.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2996 wrote to memory of 3200	2996	2026-07-29_d1dbdf36370d548c47b33d24e4ecf7ef_coinminer_elex_wannacry.exe	89
PID 3200 wrote to memory of 2572	3200	cmd.exe	91
PID 3200 wrote to memory of 2028	3200	cmd.exe	92
PID 2028 wrote to memory of 4640	2028	zavsx.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-07-29_d1dbdf36370d548c47b33d24e4ecf7ef_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-29_d1dbdf36370d548c47b33d24e4ecf7ef_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2996
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\zavsx.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-29_d1dbdf36370d548c47b33d24e4ecf7ef_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:3200
- - 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:2572
- - C:\Users\Admin\AppData\Local\Temp\zavsx.exe
    C:\Users\Admin\AppData\Local\Temp\\zavsx.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-29_d1dbdf36370d548c47b33d24e4ecf7ef_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:2028
  - - \??\c:\Program Files\zeijy\mbcmptz.exe
      "c:\Program Files\zeijy\mbcmptz.exe" "c:\Program Files\zeijy\mbcmptz.dll",Viewer C:\Users\Admin\AppData\Local\Temp\zavsx.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:4640

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

Replay Monitor

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Downloads

mbcmptz.exe

Path C:\Program Files\zeijy\mbcmptz.exe
Size 51KB
SHA256 ce6bb7eddc83762c708d4a41709ae00371dbdc09b2a380f28fa60b1edf917473
MD5 2e068ce2770fde8d1af4cb114b98df1f
SHA1 b6f9c2775babb025b22f915c3047aa627d07c312
SHA512 998d695eb56375e63df7db16740b89deb2cf630ccbead8bcf84a921ec6f4a4f9aef2755b703f7190f332b2008ebcc949363bcf8f392d7d07246c255b5073ed35
SSDEEP 1536:6G9yoVEpHP29I3fbcJboSUge5N+CnC/maz9Rh:8pv2mbcJboce58wvOR
TLSH
T137336C236A0A49B3DFE231780A9D7232526DD862075541F7A61057EAFD243E2EE743CF
MD5 SHA1 SHA512 SSDEEP TLSH

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zavsx.exe

Path C:\Users\Admin\AppData\Local\Temp\zavsx.exe
Size 401KB
SHA256 4e02a0eae0467a0e9de9e8a1ab6b75520ed74c8a3e40ed2a969b3acf4011e209
MD5 5c00661194abc245e4c63176d93fb97e
SHA1 617abf43ee4eb88f9abef2975dbb271062f9022e
SHA512 cf6fec6e044144e4366ebdcac3f18f4f1778ddc7acd61558a044a1e29b7be6a092ad065fa61fcfb7fbf52cfe428a909d4f1f9c2528846725c6b5b69082d6b5f0
SSDEEP 12288:zdDU6g13sJd1fm/+yb3O2js82ydU/DdKumH:zdE3sJd1fm/+yb3OYs84/JH6
TLSH
T13894AF01E6C741D6DE8225B081FA7377B3789A4D0F12C7E3BB68EE2E6E211D1953B119
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

mbcmptz.dll

Path \??\c:\Program Files\zeijy\mbcmptz.dll
Size 89KB
SHA256 2822e392c3462bde4076f598f1e5d98ae67ea0287eb14641a50ab3f0e03827c9
MD5 9a3974060f7dcd36650327d4c5cde0ac
SHA1 cf5b259336bbb77ecb11a933207855e35c73934b
SHA512 c46d9017f620c1238ff558aecef2fb24cd926463b040ca11062c18982da25bcd5694b4d2d94dc57f060144110d1bf894a644e98fb6670cb5032e462de01ed8af
SSDEEP 1536:XHXqO6ZG03eyenOj9lgA/PObuTMT5NMCfL7ojaZf5aZlBlG2:M1uF6Feu2NlQOBcG2
TLSH
T1CF9302C45665CD8BCCD87072727FAA4EE631D48CB941ACB34A5E13A31B36AF3D01AB45
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2028-7-0x0000000000400000-0x0000000000471000-memory.dmp

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memory/2996-0-0x0000000000400000-0x0000000000471000-memory.dmp

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memory/2996-2-0x0000000000400000-0x0000000000471000-memory.dmp

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memory/4640-10-0x0000000010000000-0x0000000010033000-memory.dmp

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memory/4640-11-0x0000000010000000-0x0000000010033000-memory.dmp

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memory/4640-13-0x0000000010000000-0x0000000010033000-memory.dmp

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memory/4640-16-0x0000000010000000-0x0000000010033000-memory.dmp

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