farfli | 2dff59e18a116d273fdc368dcd107da955afc40b70c7479a1a9b320584f0c8ec

Analysis

max time kernel
148s
max time network
137s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260710-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
10/07/2026, 22:48

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General

Target
2026-07-10_3c1bca8b908b0650c5dba46f59ad466d_coinminer_elex_wannacry.exe
Size 234KB
Sample260710-2rlhesgs7v
SHA256 2dff59e18a116d273fdc368dcd107da955afc40b70c7479a1a9b320584f0c8ec
MD5 3c1bca8b908b0650c5dba46f59ad466d
SHA1 1d1d04f6fea831ffa6e62209f9c540009a4d00f5
SHA512 80e0314816ca279cd7973f948beab2bb1b64cf5c5e0c5f574ee47aa0c719b8629463d845f1b0aa7e8341ba7253fc02f925be58f9a17f79e2bf4c145e25c8905c
SSDEEP 6144:eMgmYA/npA6SUqfjKfr4QdsICWkZ3h1SLCDFqnetKSoca:tgmYA/nsYf8QdsINkZ6CQetFI
TLSH
T16C34F18136A5CD77F0221B7D4D7B163B8536BE691B00B09BD3C4AD4FB431AE46E2E209
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery farfli gh0strat persistence rat spyware stealer

Malware Config

Extracted

Family

gh0strat

98.126.40.18:3204
http://98.126.40.19:805/index.php
http://98.126.40.20:803/

Attributes

user_agent
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C))

Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0)

Signatures

Family: Farfli
Farfli is a Windows backdoor written in C++.
backdoor farfli
Family: Gh0strat
Gh0st RAT is a remote access tool (RAT) with its source code public and it has been used by multiple Chinese groups.
rat gh0strat

Detects Farfli Backdoor 2 IoCs

resource	yara_rule
behavioral2/memory/700-11-0x0000000010000000-0x000000001006D000-memory.dmp	family_farfli
behavioral2/memory/700-14-0x0000000010000000-0x000000001006D000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/700-11-0x0000000010000000-0x000000001006D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/700-14-0x0000000010000000-0x000000001006D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2996-0-0x0000000000400000-0x0000000000468000-memory.dmp	UPX
behavioral2/memory/2996-2-0x0000000000400000-0x0000000000468000-memory.dmp	UPX
behavioral2/files/0x000700000001b858-3.dat	UPX
behavioral2/memory/4556-7-0x0000000000400000-0x0000000000468000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
4556	wygyu.exe

Executes dropped EXE 2 IoCs

pid	Process
4556	wygyu.exe
700	nbklo.exe

Loads dropped DLL 1 IoCs

pid	Process
700	nbklo.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\it = "c:\\Program Files\\fcgacj\\nbklo.exe \"c:\\Program Files\\fcgacj\\nbklo.dll\",Interface"	nbklo.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)	\??\q:	nbklo.exe
File opened (read-only)	\??\t:	nbklo.exe
File opened (read-only)	\??\d:	nbklo.exe
File opened (read-only)	\??\g:	nbklo.exe
File opened (read-only)	\??\i:	nbklo.exe
File opened (read-only)	\??\j:	nbklo.exe
File opened (read-only)	\??\r:	nbklo.exe
File opened (read-only)	\??\a:	nbklo.exe
File opened (read-only)	\??\k:	nbklo.exe
File opened (read-only)	\??\n:	nbklo.exe
File opened (read-only)	\??\u:	nbklo.exe
File opened (read-only)	\??\v:	nbklo.exe
File opened (read-only)	\??\w:	nbklo.exe
File opened (read-only)	\??\x:	nbklo.exe
File opened (read-only)	\??\b:	nbklo.exe
File opened (read-only)	\??\p:	nbklo.exe
File opened (read-only)	\??\s:	nbklo.exe
File opened (read-only)	\??\y:	nbklo.exe
File opened (read-only)	\??\z:	nbklo.exe
File opened (read-only)	\??\h:	nbklo.exe
File opened (read-only)	\??\l:	nbklo.exe
File opened (read-only)	\??\m:	nbklo.exe
File opened (read-only)	\??\o:	nbklo.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	nbklo.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\fcgacj	wygyu.exe
File created	\??\c:\Program Files\fcgacj\nbklo.dll	wygyu.exe
File created	\??\c:\Program Files\fcgacj\nbklo.exe	wygyu.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	wygyu.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nbklo.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-07-10_3c1bca8b908b0650c5dba46f59ad466d_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
4100	PING.EXE
1164	cmd.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	nbklo.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	nbklo.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4100	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
700	nbklo.exe
700	nbklo.exe
700	nbklo.exe
700	nbklo.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	700	nbklo.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2996	2026-07-10_3c1bca8b908b0650c5dba46f59ad466d_coinminer_elex_wannacry.exe
4556	wygyu.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2996 wrote to memory of 1164	2996	2026-07-10_3c1bca8b908b0650c5dba46f59ad466d_coinminer_elex_wannacry.exe	86
PID 1164 wrote to memory of 4100	1164	cmd.exe	88
PID 1164 wrote to memory of 4556	1164	cmd.exe	89
PID 4556 wrote to memory of 700	4556	wygyu.exe	90

C:\Users\Admin\AppData\Local\Temp\2026-07-10_3c1bca8b908b0650c5dba46f59ad466d_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-10_3c1bca8b908b0650c5dba46f59ad466d_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\\wygyu.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-10_3c1bca8b908b0650c5dba46f59ad466d_coinminer_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1164
- - 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:4100
- - C:\Users\Admin\AppData\Local\Temp\wygyu.exe
    C:\Users\Admin\AppData\Local\Temp\\wygyu.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-10_3c1bca8b908b0650c5dba46f59ad466d_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:4556
  - - \??\c:\Program Files\fcgacj\nbklo.exe
      "c:\Program Files\fcgacj\nbklo.exe" "c:\Program Files\fcgacj\nbklo.dll",Interface C:\Users\Admin\AppData\Local\Temp\wygyu.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:700

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

nbklo.exe

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

Submit Download

wygyu.exe

Path C:\Users\Admin\AppData\Local\Temp\wygyu.exe
Size 235KB
SHA256 b51c2ba0e2db0ca7353a827f90ff40b6aa01a63eb4e07fc88e0294d32932f616
MD5 074ab4c71bef402d0c8e0a48ee8ea855
SHA1 b57b272b073e86ebeb64f62acd4c99abaeff1f70
SHA512 ffc0a9339869a5fd9755146352136c792e6c43a52320fba51eaf0f911d86cadfdeb6edcd9c87e9adabd396d44938122addd9409058cb3b9d4afcdab08e7e193f
SSDEEP 6144:eMgmYA/npA6SUqfjKfr4QdsICWkZ3h1SLCDFqnetKSocn:tgmYA/nsYf8QdsINkZ6CQetFB
TLSH
T15C34F18136A5CD77F0221B7D4D7B163A8536BE691B00749BD3C4ED4FB431AE46E2E209
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

nbklo.dll

Path \??\c:\Program Files\fcgacj\nbklo.dll
Size 168KB
SHA256 dc1c07f0c98cad1b24995e21c4959726ad3568473a7a902d336da0f8f356d1a0
MD5 ea83727bfb505d41ef75b2552f142dee
SHA1 2ed6b38891f13a2e3578c4277ec782aa0eb1b7f8
SHA512 ec916166ea8f7d4c2da5a9f4504ba327a1c34b09bf469f4cc33675fe3e3a208d63cf2c94e8d9025466ae78cb91946b2eec065d198b747295e7ac56b7f5cb3916
SSDEEP 3072:S25S8qsPfVoCxEI5GRycgzQkf2+JKC8L1MwwYsg89R5gZMm:SJ8T1xE3ocg9f2nfLnwYsxf2Zz
TLSH
T1DDF312D3EFB649E0C4361BB06C53C10FB8620CA498725B5542D9BEEA3DA668E453D3A1
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/700-10-0x0000000010000000-0x000000001006D000-memory.dmp

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memory/700-11-0x0000000010000000-0x000000001006D000-memory.dmp

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memory/700-14-0x0000000010000000-0x000000001006D000-memory.dmp

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memory/2996-0-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/2996-2-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/4556-7-0x0000000000400000-0x0000000000468000-memory.dmp

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