farfli | a539001ed65b7d5273d2ae441d5f4b67753facf6a5133dbaf211e6569ca4e3a1

Analysis

max time kernel
149s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20260911-en
resource tags

arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
07/10/2026, 07:04

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General

Target
a539001ed65b7d5273d2ae441d5f4b67753facf6a5133dbaf211e6569ca4e3a1.exe
Size 232KB
Sample261007-hwfcest1az
SHA256 a539001ed65b7d5273d2ae441d5f4b67753facf6a5133dbaf211e6569ca4e3a1
MD5 97fda5dc6752b901650244d7fa21d79d
SHA1 f358e68f92c93f247c19e46793a9b8a652e60393
SHA512 b630017e160d030b2722a1187b7f49bdb80c7158ce38181ec3113eb659dfd04c3e1efd91df7d703e7d8e437685ae3d1e6258f3ed959db591aa6e307605491548
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkTFK:X2vnSwjaOcADw9cUeCOf
TLSH
T1E8340200D7B6E5E8D44824BA07879310EBE1DCDE7B73677183D5E31FAB41F1AA4AA190
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit defense_evasion discovery execution farfli gh0strat persistence rat spyware stealer

Malware Config

Extracted

Family

gh0strat

107.163.241.193:6520
http://107.163.241.181:16300/
http://107.163.241.182:12354/login.php

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 3 IoCs

resource	yara_rule
behavioral1/memory/5760-20-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral1/memory/5760-22-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral1/memory/5760-24-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
1644	rpvuq.exe

Executes dropped EXE 2 IoCs

pid	Process
1644	rpvuq.exe
5760	leb.exe

Loads dropped DLL 1 IoCs

pid	Process
5760	leb.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-1-5-21-2091445952-3649787497-104050984-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\vrzyc\\leb.exe \"c:\\Program Files\\vrzyc\\lebga.dll\",Compliance"	leb.exe

Enumerates connected drives 3 TTPs 24 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)	\??\n:	leb.exe
File opened (read-only)	\??\o:	leb.exe
File opened (read-only)	\??\j:	leb.exe
File opened (read-only)	\??\l:	leb.exe
File opened (read-only)	\??\q:	leb.exe
File opened (read-only)	\??\t:	leb.exe
File opened (read-only)	\??\y:	leb.exe
	\??\f:\	leb.exe
File opened (read-only)	\??\i:	leb.exe
File opened (read-only)	\??\r:	leb.exe
File opened (read-only)	\??\s:	leb.exe
File opened (read-only)	\??\v:	leb.exe
File opened (read-only)	\??\z:	leb.exe
File opened (read-only)	\??\a:	leb.exe
File opened (read-only)	\??\e:	leb.exe
File opened (read-only)	\??\g:	leb.exe
File opened (read-only)	\??\h:	leb.exe
File opened (read-only)	\??\k:	leb.exe
File opened (read-only)	\??\m:	leb.exe
File opened (read-only)	\??\u:	leb.exe
File opened (read-only)	\??\b:	leb.exe
File opened (read-only)	\??\p:	leb.exe
File opened (read-only)	\??\w:	leb.exe
File opened (read-only)	\??\x:	leb.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	leb.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\vrzyc	rpvuq.exe
File created	\??\c:\Program Files\vrzyc\lebga.dll	rpvuq.exe
File created	\??\c:\Program Files\vrzyc\leb.exe	rpvuq.exe
File opened for modification	\??\c:\Program Files\vrzyc\leb.exe	rpvuq.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
4756	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	leb.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	leb.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	leb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a539001ed65b7d5273d2ae441d5f4b67753facf6a5133dbaf211e6569ca4e3a1.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	rpvuq.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
4756	cmd.exe
4896	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	leb.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	leb.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4896	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5760	leb.exe
5760	leb.exe
5760	leb.exe
5760	leb.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5760	leb.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4808	a539001ed65b7d5273d2ae441d5f4b67753facf6a5133dbaf211e6569ca4e3a1.exe
1644	rpvuq.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4808 wrote to memory of 4756	4808	a539001ed65b7d5273d2ae441d5f4b67753facf6a5133dbaf211e6569ca4e3a1.exe	84
PID 4756 wrote to memory of 4896	4756	cmd.exe	86
PID 4756 wrote to memory of 1644	4756	cmd.exe	87
PID 1644 wrote to memory of 5760	1644	rpvuq.exe	88

C:\Users\Admin\AppData\Local\Temp\a539001ed65b7d5273d2ae441d5f4b67753facf6a5133dbaf211e6569ca4e3a1.exe
"C:\Users\Admin\AppData\Local\Temp\a539001ed65b7d5273d2ae441d5f4b67753facf6a5133dbaf211e6569ca4e3a1.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4808
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\rpvuq.exe "C:\Users\Admin\AppData\Local\Temp\a539001ed65b7d5273d2ae441d5f4b67753facf6a5133dbaf211e6569ca4e3a1.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:4756
- - 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:4896
- - C:\Users\Admin\AppData\Local\Temp\rpvuq.exe
    C:\Users\Admin\AppData\Local\Temp\\rpvuq.exe "C:\Users\Admin\AppData\Local\Temp\a539001ed65b7d5273d2ae441d5f4b67753facf6a5133dbaf211e6569ca4e3a1.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:1644
  - - \??\c:\Program Files\vrzyc\leb.exe
      "c:\Program Files\vrzyc\leb.exe" "c:\Program Files\vrzyc\lebga.dll",Compliance C:\Users\Admin\AppData\Local\Temp\rpvuq.exe
      4⤵
      Executes dropped EXE
      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:5760

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

leb.exe

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

Submit Download

lebga.dll

Path C:\Program Files\vrzyc\lebga.dll
Size 141KB
SHA256 a8a0c7597feb48196c87bcfd92faf3be6b0022eb4b8f742128e001d36ad5bb17
MD5 388db3683b901cc3b7456212b6dfb58a
SHA1 b28f9f9355bd3cc20d056063693a8431ae8fd6ce
SHA512 544b8d92de104ecc305b6759fc3fd4c45a4f850ac61a137d905a66958f2c93033139eb4e8c7a3ccbc01ac5edc4f38482f79c33e8287c11fcdd383e445af67e92
SSDEEP 3072:RGmRmNJToTJfp2D1QzpSyiJEkGSPf1bc4lf:RGMmfToTJY6zpSyvkGSn1tlf
TLSH
T1E1E312E0E3A7C4B6C269573187937DF3162CF4346B18072EFD62632769394C44B9DA16
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

rpvuq.exe

Path C:\Users\Admin\AppData\Local\Temp\rpvuq.exe
Size 232KB
SHA256 ae9bdaaa6f9c5e1a1cea810d1d832ce3c7fec9bc4f4320689d47b7113d32ca10
MD5 70023510ad051c3eceaebe7970e569d1
SHA1 817c1155fe9c82932a801b9d6a42feae96da9761
SHA512 909b29794716f46fd034a9f27338631bf895f4a65b57752011655926d43563ee4bcc61627aeb10977c9950484f224dea25ec4072aae42765f3197204af9fee0a
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkTFKK:X2vnSwjaOcADw9cUeCOfr
TLSH
T164340200D7B2E5E8D44824BA07879310EBE1DCDE7B73677183D5E31FAB41F1AA4AA190
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1644-8-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/1644-9-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/1644-16-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4808-4-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4808-0-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4808-1-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4808-2-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/5760-19-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/5760-20-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/5760-22-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/5760-24-0x0000000010000000-0x000000001004E000-memory.dmp

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