farfli | a4bc9af99fde4dbe259cec2086423fd87f7b09e7bcef218c5961fd1a8ea5f456

Analysis

max time kernel
150s
max time network
147s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
22/08/2026, 15:38

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General

Target
a4bc9af99fde4dbe259cec2086423fd87f7b09e7bcef218c5961fd1a8ea5f456.exe
Size 231KB
Sample260822-s3f8eahn81
SHA256 a4bc9af99fde4dbe259cec2086423fd87f7b09e7bcef218c5961fd1a8ea5f456
MD5 e6610d46b3902bc65b2a8e46856147f2
SHA1 b970d7cb7face47eae88b8dbd137df2dca0591ad
SHA512 c38fd3c9610c6c6e460c0a256634649ffcb08d9887e624bd36a6224403da5e56580bfe1121737f70dda8e9b5a256b260de0dfce8b354e864db849f193f4db422
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkTFC:X2vnSwjaOcADw9cUeCOfC
TLSH
T1CC340200DBB2F5E8D44824BA0787D320E6E1DDDE7B73677143D5E22FAB41F16A4AA190
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
behavioral2/memory/4784-16-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral2/memory/4784-18-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli
behavioral2/memory/4784-21-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli

Deletes itself 1 IoCs

pid	Process
2844	yatcd.exe

Executes dropped EXE 2 IoCs

pid	Process
2844	yatcd.exe
4784	cddpvju.exe

Loads dropped DLL 1 IoCs

pid	Process
4784	cddpvju.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-1-5-21-3989226554-2204910950-1522900112-1000\Software\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\gwcktttp\\cddpvju.exe \"c:\\Program Files\\gwcktttp\\cddpvju.dll\",Compliance"	cddpvju.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)	\??\b:	cddpvju.exe
File opened (read-only)	\??\h:	cddpvju.exe
File opened (read-only)	\??\i:	cddpvju.exe
File opened (read-only)	\??\p:	cddpvju.exe
File opened (read-only)	\??\x:	cddpvju.exe
File opened (read-only)	\??\y:	cddpvju.exe
File opened (read-only)	\??\z:	cddpvju.exe
File opened (read-only)	\??\d:	cddpvju.exe
File opened (read-only)	\??\g:	cddpvju.exe
File opened (read-only)	\??\k:	cddpvju.exe
File opened (read-only)	\??\n:	cddpvju.exe
File opened (read-only)	\??\o:	cddpvju.exe
File opened (read-only)	\??\r:	cddpvju.exe
File opened (read-only)	\??\t:	cddpvju.exe
File opened (read-only)	\??\m:	cddpvju.exe
File opened (read-only)	\??\v:	cddpvju.exe
File opened (read-only)	\??\a:	cddpvju.exe
File opened (read-only)	\??\j:	cddpvju.exe
File opened (read-only)	\??\l:	cddpvju.exe
File opened (read-only)	\??\q:	cddpvju.exe
File opened (read-only)	\??\s:	cddpvju.exe
File opened (read-only)	\??\u:	cddpvju.exe
File opened (read-only)	\??\w:	cddpvju.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	cddpvju.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\gwcktttp	yatcd.exe
File created	\??\c:\Program Files\gwcktttp\cddpvju.dll	yatcd.exe
File created	\??\c:\Program Files\gwcktttp\cddpvju.exe	yatcd.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
4380	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	yatcd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cddpvju.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a4bc9af99fde4dbe259cec2086423fd87f7b09e7bcef218c5961fd1a8ea5f456.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
4380	cmd.exe
2532	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	cddpvju.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	cddpvju.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2532	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4784	cddpvju.exe
4784	cddpvju.exe
4784	cddpvju.exe
4784	cddpvju.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4784	cddpvju.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4136	a4bc9af99fde4dbe259cec2086423fd87f7b09e7bcef218c5961fd1a8ea5f456.exe
2844	yatcd.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4136 wrote to memory of 4380	4136	a4bc9af99fde4dbe259cec2086423fd87f7b09e7bcef218c5961fd1a8ea5f456.exe	89
PID 4380 wrote to memory of 2532	4380	cmd.exe	91
PID 4380 wrote to memory of 2844	4380	cmd.exe	92
PID 2844 wrote to memory of 4784	2844	yatcd.exe	93

C:\Users\Admin\AppData\Local\Temp\a4bc9af99fde4dbe259cec2086423fd87f7b09e7bcef218c5961fd1a8ea5f456.exe
"C:\Users\Admin\AppData\Local\Temp\a4bc9af99fde4dbe259cec2086423fd87f7b09e7bcef218c5961fd1a8ea5f456.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4136
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\yatcd.exe "C:\Users\Admin\AppData\Local\Temp\a4bc9af99fde4dbe259cec2086423fd87f7b09e7bcef218c5961fd1a8ea5f456.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:4380
- - 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:2532
- - C:\Users\Admin\AppData\Local\Temp\yatcd.exe
    C:\Users\Admin\AppData\Local\Temp\\yatcd.exe "C:\Users\Admin\AppData\Local\Temp\a4bc9af99fde4dbe259cec2086423fd87f7b09e7bcef218c5961fd1a8ea5f456.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:2844
  - - \??\c:\Program Files\gwcktttp\cddpvju.exe
      "c:\Program Files\gwcktttp\cddpvju.exe" "c:\Program Files\gwcktttp\cddpvju.dll",Compliance C:\Users\Admin\AppData\Local\Temp\yatcd.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:4784

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

cddpvju.exe

Path C:\Program Files\gwcktttp\cddpvju.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

yatcd.exe

Path C:\Users\Admin\AppData\Local\Temp\yatcd.exe
Size 231KB
SHA256 bb08d771d23fe205ccc0e4a6611ef1d220405ec8867e44b150fe21a94f21c417
MD5 4ac4bde9555abe0ed5636d1f8138d6f6
SHA1 9c6a611527908db5f7b965f2119bd8f394a99929
SHA512 07d82d1b124e160b0b6d83cd1e33d21078d028350e3c5fb12d7a6fb3ef5317e700f80d1c14bb38767ac5255ff8582996de5b0687ef9ad5ddb428c1f1ea7116b0
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkTF:X2vnSwjaOcADw9cUeCOf
TLSH
T1C2340200DBB2F5E8D44824BA0787D320E6E1DDDE7B73677143D5E22FAB41F16A4AA190
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

cddpvju.dll

Path \??\c:\Program Files\gwcktttp\cddpvju.dll
Size 141KB
SHA256 4cc49dc5ac4878f57ba889b9b9651dfeb920f97c3541ead4786f0900874f0ad5
MD5 38761f94f613977476851b02b683f1b8
SHA1 0c03edc1fca8b2d81090ae26ca41e133f3c8bf11
SHA512 8c5735ab572c62c2ec96fe67b6088d634da4a990475bb5e7c79b40d54a08445b1061f021a9fba01c2707d1630cf1f1433ea3f78ccd801e016f163aef105586db
SSDEEP 3072:RGmRmNJToTJfp2D1QzpSyiJEkGSPf1bc4ls:RGMmfToTJY6zpSyvkGSn1tls
TLSH
T1FFE312E0E3A7C4B6C265573183937DF3162CF5346B18072EED62A32769394C84B9DA1A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2844-8-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2844-7-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/2844-12-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4136-4-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4136-0-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4136-2-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4136-1-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/4784-15-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/4784-16-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/4784-18-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/4784-21-0x0000000010000000-0x000000001004E000-memory.dmp

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