farfli | 85174b0ec59a3184582257c715ae0b495aed1f0b1abe25f5b727c4367afd963e

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
14/10/2026, 07:36

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General

Target
85174b0ec59a3184582257c715ae0b495aed1f0b1abe25f5b727c4367afd963e.exe
Size 230KB
Sample261014-jfc3sshx5y
SHA256 85174b0ec59a3184582257c715ae0b495aed1f0b1abe25f5b727c4367afd963e
MD5 c0793084738f96644788bd477d1ce8e2
SHA1 e3054c9a382bb800b9d4db3982d3435d903514a6
SHA512 46c9f5d5feb8ea2e2293a01489cff9542ee5667a0298db2321e8a7b9c176092b38a677290cb888a0352401c7570ab05cd6b031355107621f8e9aed27447c23b3
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkTF4:X2vnSwjaOcADw9cUeCOf4
TLSH
T1F8340200DBB2E5E8D448247A07879310EBF1DDDE7B73677143D5E22FAB41F1AA4AA190
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
behavioral1/memory/5868-19-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral1/memory/5868-20-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral1/memory/5868-22-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral1/memory/5868-25-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
2008	kalpo.exe

Executes dropped EXE 2 IoCs

pid	Process
2008	kalpo.exe
5868	xpr.exe

Loads dropped DLL 1 IoCs

pid	Process
5868	xpr.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\\orrck\\xpr.exe \"c:\\Program Files\\orrck\\xprzw.dll\",Compliance"	xpr.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)	\??\e:	xpr.exe
File opened (read-only)	\??\l:	xpr.exe
File opened (read-only)	\??\n:	xpr.exe
File opened (read-only)	\??\o:	xpr.exe
File opened (read-only)	\??\s:	xpr.exe
File opened (read-only)	\??\u:	xpr.exe
File opened (read-only)	\??\h:	xpr.exe
File opened (read-only)	\??\i:	xpr.exe
File opened (read-only)	\??\p:	xpr.exe
File opened (read-only)	\??\r:	xpr.exe
File opened (read-only)	\??\t:	xpr.exe
File opened (read-only)	\??\v:	xpr.exe
File opened (read-only)	\??\x:	xpr.exe
File opened (read-only)	\??\z:	xpr.exe
File opened (read-only)	\??\b:	xpr.exe
File opened (read-only)	\??\g:	xpr.exe
File opened (read-only)	\??\j:	xpr.exe
File opened (read-only)	\??\k:	xpr.exe
File opened (read-only)	\??\m:	xpr.exe
File opened (read-only)	\??\q:	xpr.exe
File opened (read-only)	\??\w:	xpr.exe
File opened (read-only)	\??\y:	xpr.exe
File opened (read-only)	\??\a:	xpr.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	xpr.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\orrck	kalpo.exe
File created	\??\c:\Program Files\orrck\xprzw.dll	kalpo.exe
File created	\??\c:\Program Files\orrck\xpr.exe	kalpo.exe
File opened for modification	\??\c:\Program Files\orrck\xpr.exe	kalpo.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
3444	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\Domain	xpr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	xpr.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	85174b0ec59a3184582257c715ae0b495aed1f0b1abe25f5b727c4367afd963e.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	kalpo.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	xpr.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
3444	cmd.exe
4784	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	xpr.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	xpr.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4784	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5868	xpr.exe
5868	xpr.exe
5868	xpr.exe
5868	xpr.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5868	xpr.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5432	85174b0ec59a3184582257c715ae0b495aed1f0b1abe25f5b727c4367afd963e.exe
2008	kalpo.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5432 wrote to memory of 3444	5432	85174b0ec59a3184582257c715ae0b495aed1f0b1abe25f5b727c4367afd963e.exe	86
PID 3444 wrote to memory of 4784	3444	cmd.exe	89
PID 3444 wrote to memory of 2008	3444	cmd.exe	92
PID 2008 wrote to memory of 5868	2008	kalpo.exe	93

C:\Users\Admin\AppData\Local\Temp\85174b0ec59a3184582257c715ae0b495aed1f0b1abe25f5b727c4367afd963e.exe
"C:\Users\Admin\AppData\Local\Temp\85174b0ec59a3184582257c715ae0b495aed1f0b1abe25f5b727c4367afd963e.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5432
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\kalpo.exe "C:\Users\Admin\AppData\Local\Temp\85174b0ec59a3184582257c715ae0b495aed1f0b1abe25f5b727c4367afd963e.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:3444
- - 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:4784
- - C:\Users\Admin\AppData\Local\Temp\kalpo.exe
    C:\Users\Admin\AppData\Local\Temp\\kalpo.exe "C:\Users\Admin\AppData\Local\Temp\85174b0ec59a3184582257c715ae0b495aed1f0b1abe25f5b727c4367afd963e.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:2008
  - - \??\c:\Program Files\orrck\xpr.exe
      "c:\Program Files\orrck\xpr.exe" "c:\Program Files\orrck\xprzw.dll",Compliance C:\Users\Admin\AppData\Local\Temp\kalpo.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:5868

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

xpr.exe

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

Submit Download

kalpo.exe

Path C:\Users\Admin\AppData\Local\Temp\kalpo.exe
Size 231KB
SHA256 c017c043e5759c649787ef3163198df7523d976cec793a8c560ebea3f363fa7c
MD5 d4a4d56c6cfc265b339d57539040d420
SHA1 04fafa26df2f67a90b161079c448daf5e08db71a
SHA512 f6c005ab38f1ecc718783d79c3036f0e55e339dad426858f29100d630217ce0aa101d94ce46a22f9a552e3cca952777c2619b180f9541128f79c80d48dc77fb8
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkTF:X2vnSwjaOcADw9cUeCOf
TLSH
T1F4340200DBB2E5E8D448247A07879310EBF1DDDE7B73677143D5E22FAB41F1AA4AA190
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

xprzw.dll

Path \??\c:\Program Files\orrck\xprzw.dll
Size 141KB
SHA256 3f1db999f397d6322c9b17583f8dbac40d4ee69ec75091a697331e6ad143412f
MD5 feb6f49ed13d7f474b3bdaeaab77f13a
SHA1 f74d613404070c0a350e308871c892cde82f35bf
SHA512 1ea9b6e2f15e9e609d668378d917763190a9a4d41e55a6f7cddd853969c91840bd1a6a22faf535c64a204c9f415221204e95dd42c23b70a801aa8d64a84fedd4
SSDEEP 3072:RGmRmNJToTJfp2D1QzpSyiJEkGSPf1bc4lg:RGMmfToTJY6zpSyvkGSn1tlg
TLSH
T1DAE312E0E3B7C4B6C269573143937DF31628F4346B18072AFD62A32769394C44B9DB1A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2008-9-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2008-8-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2008-15-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/5432-4-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/5432-0-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/5432-2-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/5432-1-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/5868-19-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/5868-20-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/5868-22-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/5868-25-0x0000000010000000-0x000000001004E000-memory.dmp

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