farfli | 4fd0bb997b21d9bdd49ca8a99f3321b8dde0e3127532e1f98b7aab4a51acb6ad

Analysis

max time kernel
148s
max time network
137s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
01/10/2026, 06:57

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General

Target
4fd0bb997b21d9bdd49ca8a99f3321b8dde0e3127532e1f98b7aab4a51acb6ad.exe
Size 197KB
Sample261001-hraw5sdb87
SHA256 4fd0bb997b21d9bdd49ca8a99f3321b8dde0e3127532e1f98b7aab4a51acb6ad
MD5 4dc46beb16ddc8435def20a1f5426ff4
SHA1 e3dbde42c622377bdc23d401f00439e70063912e
SHA512 738e9f456bc9402f482ac4bc0edc7c66b4b46b273c11f006119bc94bc0664da53d6f4324a836b8d1e99ef93e31ec1e43a8ee7560eab9bdab319accbbc3ec4fca
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkTy:X2vnSwjaOcADw9cUeCOfE
TLSH
T10C141200DBA461E8D49874BA0AC36321E7F2DACDFB735BF152D6D22BAF40F162459890
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 4 IoCs

resource	yara_rule
behavioral2/memory/2732-15-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral2/memory/2732-16-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral2/memory/2732-18-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral2/memory/2732-24-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
3556	xoserjcb.exe

Executes dropped EXE 2 IoCs

pid	Process
3556	xoserjcb.exe
2732	kjudjrpp.exe

Loads dropped DLL 1 IoCs

pid	Process
2732	kjudjrpp.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-1-5-21-2251218687-1689653882-3767565116-1000\Software\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\mbypgdao\\kjudjrpp.exe \"c:\\Program Files\\mbypgdao\\kjudjrpp.dll\",Compliance"	kjudjrpp.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)	\??\a:	kjudjrpp.exe
File opened (read-only)	\??\m:	kjudjrpp.exe
File opened (read-only)	\??\n:	kjudjrpp.exe
File opened (read-only)	\??\u:	kjudjrpp.exe
File opened (read-only)	\??\z:	kjudjrpp.exe
File opened (read-only)	\??\d:	kjudjrpp.exe
File opened (read-only)	\??\g:	kjudjrpp.exe
File opened (read-only)	\??\l:	kjudjrpp.exe
File opened (read-only)	\??\o:	kjudjrpp.exe
File opened (read-only)	\??\y:	kjudjrpp.exe
File opened (read-only)	\??\b:	kjudjrpp.exe
	\??\f:\	kjudjrpp.exe
File opened (read-only)	\??\i:	kjudjrpp.exe
File opened (read-only)	\??\j:	kjudjrpp.exe
File opened (read-only)	\??\k:	kjudjrpp.exe
File opened (read-only)	\??\p:	kjudjrpp.exe
File opened (read-only)	\??\q:	kjudjrpp.exe
File opened (read-only)	\??\r:	kjudjrpp.exe
File opened (read-only)	\??\h:	kjudjrpp.exe
File opened (read-only)	\??\s:	kjudjrpp.exe
File opened (read-only)	\??\t:	kjudjrpp.exe
File opened (read-only)	\??\v:	kjudjrpp.exe
File opened (read-only)	\??\w:	kjudjrpp.exe
File opened (read-only)	\??\x:	kjudjrpp.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	kjudjrpp.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	\??\c:\Program Files\mbypgdao\kjudjrpp.dll	xoserjcb.exe
File created	\??\c:\Program Files\mbypgdao\kjudjrpp.exe	xoserjcb.exe
File opened for modification	\??\c:\Program Files\mbypgdao	xoserjcb.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
616	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	kjudjrpp.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	kjudjrpp.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	4fd0bb997b21d9bdd49ca8a99f3321b8dde0e3127532e1f98b7aab4a51acb6ad.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	xoserjcb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	kjudjrpp.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
616	cmd.exe
3832	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	kjudjrpp.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kjudjrpp.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3832	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2732	kjudjrpp.exe
2732	kjudjrpp.exe
2732	kjudjrpp.exe
2732	kjudjrpp.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2732	kjudjrpp.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4372	4fd0bb997b21d9bdd49ca8a99f3321b8dde0e3127532e1f98b7aab4a51acb6ad.exe
3556	xoserjcb.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4372 wrote to memory of 616	4372	4fd0bb997b21d9bdd49ca8a99f3321b8dde0e3127532e1f98b7aab4a51acb6ad.exe	89
PID 616 wrote to memory of 3832	616	cmd.exe	91
PID 616 wrote to memory of 3556	616	cmd.exe	92
PID 3556 wrote to memory of 2732	3556	xoserjcb.exe	93

C:\Users\Admin\AppData\Local\Temp\4fd0bb997b21d9bdd49ca8a99f3321b8dde0e3127532e1f98b7aab4a51acb6ad.exe
"C:\Users\Admin\AppData\Local\Temp\4fd0bb997b21d9bdd49ca8a99f3321b8dde0e3127532e1f98b7aab4a51acb6ad.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4372
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\xoserjcb.exe "C:\Users\Admin\AppData\Local\Temp\4fd0bb997b21d9bdd49ca8a99f3321b8dde0e3127532e1f98b7aab4a51acb6ad.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:616
- - 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:3832
- - C:\Users\Admin\AppData\Local\Temp\xoserjcb.exe
    C:\Users\Admin\AppData\Local\Temp\\xoserjcb.exe "C:\Users\Admin\AppData\Local\Temp\4fd0bb997b21d9bdd49ca8a99f3321b8dde0e3127532e1f98b7aab4a51acb6ad.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:3556
  - - \??\c:\Program Files\mbypgdao\kjudjrpp.exe
      "c:\Program Files\mbypgdao\kjudjrpp.exe" "c:\Program Files\mbypgdao\kjudjrpp.dll",Compliance C:\Users\Admin\AppData\Local\Temp\xoserjcb.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:2732

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

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Downloads

kjudjrpp.exe

Path C:\Program Files\mbypgdao\kjudjrpp.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

xoserjcb.exe

Path C:\Users\Admin\AppData\Local\Temp\xoserjcb.exe
Size 197KB
SHA256 143156bb025b14b04041e673e495a272954260ac4bb3a67d1426047f1c468337
MD5 f19d267c35513197dc159e6609eeb10a
SHA1 4f5b01071e18fd2f33e0fe1341933e9ec2b2979e
SHA512 ded2abf91d9c86e56a071abee8df6fdfbd4b889a7d02337fd4b24f5db7aab98407e512e2ca9a97b4dcb1df2605f9833d89b8a3f86ebd10c1bad64f112a21dcb5
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkT:X2vnSwjaOcADw9cUeCOf
TLSH
T145141200DBA461E8D49874BA0AC36321E7F2DACDFB735BF152D6D22BAF40F162459890
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

kjudjrpp.dll

Path \??\c:\Program Files\mbypgdao\kjudjrpp.dll
Size 141KB
SHA256 d98a44334a3e97b8447d4d90b94449941e6c575c9f82ed3d71db547afc14f3e8
MD5 6673326677c6e6d7339dc3da74b651eb
SHA1 0589e52e5258097120a5e82e7b84365459790d10
SHA512 235cc714e245adff109b77f17ace5e18229572dfcf2069e99427d3b26489362db515992e1c771cf850410ec804cb209a402f99a0e55c659132be556c3805050e
SSDEEP 3072:RGmRmNJToTJfp2D1QzpSyiJEkGSPf1bc4lk:RGMmfToTJY6zpSyvkGSn1tlk
TLSH
T164E312E0F3A7C4B6C2695B3187937DF3161CF4346B18072AFD62A32769394C44B9DA1A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2732-24-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/2732-18-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/2732-16-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/2732-15-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/3556-9-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/3556-12-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/3556-8-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4372-0-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4372-5-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4372-1-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4372-2-0x0000000000400000-0x000000000044901D-memory.dmp

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