farfli | 39b8cddc4c5db3bb653f1dd03b42e5c7e7bff7a58f169865fbaa5e53196c36a6

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
05/08/2026, 10:44

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General

Target
39b8cddc4c5db3bb653f1dd03b42e5c7e7bff7a58f169865fbaa5e53196c36a6.exe
Size 230KB
Sample260805-ms1amszthy
SHA256 39b8cddc4c5db3bb653f1dd03b42e5c7e7bff7a58f169865fbaa5e53196c36a6
MD5 a5e75650ed25049108407f6ac3f5d079
SHA1 a8bd5d682366a669de6538e5525985d1b5c8abf3
SHA512 f0e3dee8d5d55ce59ce6ba59f0dca25deabebbf4f9cdbf3d605ce3031d2b78a2aec7b6c7f70dea6f2b35b5ed09ebf9b32310d238f31b32dc51775d2715fe6a7a
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkTF:X2vnSwjaOcADw9cUeCOf
TLSH
T14C340200DBB2E5E8D448247A07879310EBF1DDDE7B73677143D5E22FAB41F1AA4AA190
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit 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/2840-21-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral1/memory/2840-23-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral1/memory/2840-26-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli

Deletes itself 1 IoCs

pid	Process
5072	mdwmpsmud.exe

Executes dropped EXE 2 IoCs

pid	Process
5072	mdwmpsmud.exe
2840	ukk.exe

Loads dropped DLL 1 IoCs

pid	Process
2840	ukk.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-1-5-21-889581200-2041691093-2048517887-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\qrdum\\ukk.exe \"c:\\Program Files\\qrdum\\ukkru.dll\",Compliance"	ukk.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)	\??\w:	ukk.exe
File opened (read-only)	\??\x:	ukk.exe
File opened (read-only)	\??\p:	ukk.exe
File opened (read-only)	\??\a:	ukk.exe
File opened (read-only)	\??\g:	ukk.exe
File opened (read-only)	\??\k:	ukk.exe
File opened (read-only)	\??\m:	ukk.exe
File opened (read-only)	\??\n:	ukk.exe
File opened (read-only)	\??\y:	ukk.exe
File opened (read-only)	\??\e:	ukk.exe
File opened (read-only)	\??\i:	ukk.exe
File opened (read-only)	\??\l:	ukk.exe
File opened (read-only)	\??\r:	ukk.exe
File opened (read-only)	\??\u:	ukk.exe
File opened (read-only)	\??\v:	ukk.exe
File opened (read-only)	\??\q:	ukk.exe
File opened (read-only)	\??\b:	ukk.exe
File opened (read-only)	\??\h:	ukk.exe
File opened (read-only)	\??\j:	ukk.exe
File opened (read-only)	\??\s:	ukk.exe
File opened (read-only)	\??\t:	ukk.exe
File opened (read-only)	\??\z:	ukk.exe
File opened (read-only)	\??\o:	ukk.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	ukk.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\qrdum	mdwmpsmud.exe
File created	\??\c:\Program Files\qrdum\ukkru.dll	mdwmpsmud.exe
File created	\??\c:\Program Files\qrdum\ukk.exe	mdwmpsmud.exe
File opened for modification	\??\c:\Program Files\qrdum\ukk.exe	mdwmpsmud.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
5064	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	mdwmpsmud.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ukk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	39b8cddc4c5db3bb653f1dd03b42e5c7e7bff7a58f169865fbaa5e53196c36a6.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
5064	cmd.exe
4000	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	ukk.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	ukk.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4000	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2840	ukk.exe
2840	ukk.exe
2840	ukk.exe
2840	ukk.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2840	ukk.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4812	39b8cddc4c5db3bb653f1dd03b42e5c7e7bff7a58f169865fbaa5e53196c36a6.exe
5072	mdwmpsmud.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4812 wrote to memory of 5064	4812	39b8cddc4c5db3bb653f1dd03b42e5c7e7bff7a58f169865fbaa5e53196c36a6.exe	84
PID 5064 wrote to memory of 4000	5064	cmd.exe	86
PID 5064 wrote to memory of 5072	5064	cmd.exe	87
PID 5072 wrote to memory of 2840	5072	mdwmpsmud.exe	88

C:\Users\Admin\AppData\Local\Temp\39b8cddc4c5db3bb653f1dd03b42e5c7e7bff7a58f169865fbaa5e53196c36a6.exe
"C:\Users\Admin\AppData\Local\Temp\39b8cddc4c5db3bb653f1dd03b42e5c7e7bff7a58f169865fbaa5e53196c36a6.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4812
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\mdwmpsmud.exe "C:\Users\Admin\AppData\Local\Temp\39b8cddc4c5db3bb653f1dd03b42e5c7e7bff7a58f169865fbaa5e53196c36a6.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:5064
- - 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:4000
- - C:\Users\Admin\AppData\Local\Temp\mdwmpsmud.exe
    C:\Users\Admin\AppData\Local\Temp\\mdwmpsmud.exe "C:\Users\Admin\AppData\Local\Temp\39b8cddc4c5db3bb653f1dd03b42e5c7e7bff7a58f169865fbaa5e53196c36a6.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:5072
  - - \??\c:\Program Files\qrdum\ukk.exe
      "c:\Program Files\qrdum\ukk.exe" "c:\Program Files\qrdum\ukkru.dll",Compliance C:\Users\Admin\AppData\Local\Temp\mdwmpsmud.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:2840

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

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Downloads

ukkru.dll

Path C:\Program Files\qrdum\ukkru.dll
Size 141KB
SHA256 108966d0b8db39c50d7895e489e4b71707b893d1175df3032a9b8cc037df1a97
MD5 044bed570c2934b8a6d53f59e836502c
SHA1 11b6a9991406fc070818cc3099e1d70a817e19c6
SHA512 ed92f245b48be67bb5b5a05cb3802c60212f7e12540ac108d81369ff386547f4d839ad63195705d013e4f3a2a1884bc9a682eb2e488394fd4fc51945b3194f7a
SSDEEP 3072:RGmRmNJToTJfp2D1QzpSyiJEkGSPf1bc4lr:RGMmfToTJY6zpSyvkGSn1tlr
TLSH
T1D6E302E0E3A7C4B6C265573183937DF3162CF5346B18072AED62A32769394C44A9DB1A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

mdwmpsmud.exe

Path C:\Users\Admin\AppData\Local\Temp\mdwmpsmud.exe
Size 230KB
SHA256 31745bb5429ea7c61de4846b8e293df38987742d33ec30ad5b64da546e799830
MD5 c2ffac894a1c64a65c8c4a4d72a11c4f
SHA1 afd3644fea34508b40a1a3b5bdcbeafbd8c459a4
SHA512 0b77c82595f5c42cb5f0fa0a4e745095a7317d2a28322aee8ee3832cd2ac86746c3d29363732189b047e45b9c1ee6a76716b5962b784ae4b5a40677215af806e
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkTFF:X2vnSwjaOcADw9cUeCOfF
TLSH
T197340200DBB2E5E8D448247A07879310EBF1DDDE7B73677143D5E22FAB41F1AA4AA190
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ukk.exe

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

Submit Download

memory/2840-21-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/2840-26-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/2840-20-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/2840-23-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/4812-2-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4812-1-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4812-5-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4812-0-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/5072-10-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/5072-18-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/5072-9-0x0000000000400000-0x000000000044901D-memory.dmp

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