farfli | 0c91b2693e862d98f906e59a70301a9a79cf906994d25aae83b0dc088d927b79

Analysis

max time kernel
149s
max time network
158s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
23/04/2026, 08:52

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General

Target
0c91b2693e862d98f906e59a70301a9a79cf906994d25aae83b0dc088d927b79.exe
Size 236KB
Sample260423-ks3dwsfw21
SHA256 0c91b2693e862d98f906e59a70301a9a79cf906994d25aae83b0dc088d927b79
MD5 97da1f7877d647eb196c70c663a1256f
SHA1 5b785e68c74382bc9809316010c337806aa67afd
SHA512 201f0035f0028a1d739db9b665c33220178a7363e7b2eb8e397fecb79d9bf1e12cf7d564212c1fdddabf465a7ac568b3adcc90ef632a06afb7786866960c9610
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkTFK+:X2vnSwjaOcADw9cUeCOfX
TLSH
T16834F200D7B2E5E8D448247A0787D310EAE5DCDE7B73677183D5E31FAB81F1AA4AA190
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery 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 1 IoCs

resource	yara_rule
behavioral2/memory/404-21-0x0000000010000000-0x000000001004E000-memory.dmp	family_farfli

Deletes itself 1 IoCs

pid	Process
1080	nhauv.exe

Executes dropped EXE 2 IoCs

pid	Process
1080	nhauv.exe
404	ulmz.exe

Loads dropped DLL 1 IoCs

pid	Process
404	ulmz.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-1-5-21-1383858298-2057492509-1726743289-1000\Software\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\dpsunzrm\\ulmz.exe \"c:\\Program Files\\dpsunzrm\\ulmzl.dll\",Compliance"	ulmz.exe

Enumerates connected drives 3 TTPs 2 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:	ulmz.exe
File opened (read-only)	\??\a:	ulmz.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	ulmz.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\dpsunzrm	nhauv.exe
File created	\??\c:\Program Files\dpsunzrm\ulmzl.dll	nhauv.exe
File created	\??\c:\Program Files\dpsunzrm\ulmz.exe	nhauv.exe
File opened for modification	\??\c:\Program Files\dpsunzrm\ulmz.exe	nhauv.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3140	404	WerFault.exe	84

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	0c91b2693e862d98f906e59a70301a9a79cf906994d25aae83b0dc088d927b79.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	nhauv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ulmz.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
1752	PING.EXE
2776	cmd.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	ulmz.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	ulmz.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1752	PING.EXE

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	404	ulmz.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3840	0c91b2693e862d98f906e59a70301a9a79cf906994d25aae83b0dc088d927b79.exe
1080	nhauv.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3840 wrote to memory of 2776	3840	0c91b2693e862d98f906e59a70301a9a79cf906994d25aae83b0dc088d927b79.exe	80
PID 2776 wrote to memory of 1752	2776	cmd.exe	82
PID 2776 wrote to memory of 1080	2776	cmd.exe	83
PID 1080 wrote to memory of 404	1080	nhauv.exe	84

C:\Users\Admin\AppData\Local\Temp\0c91b2693e862d98f906e59a70301a9a79cf906994d25aae83b0dc088d927b79.exe
"C:\Users\Admin\AppData\Local\Temp\0c91b2693e862d98f906e59a70301a9a79cf906994d25aae83b0dc088d927b79.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3840
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\nhauv.exe "C:\Users\Admin\AppData\Local\Temp\0c91b2693e862d98f906e59a70301a9a79cf906994d25aae83b0dc088d927b79.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2776
- - 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:1752
- - C:\Users\Admin\AppData\Local\Temp\nhauv.exe
    C:\Users\Admin\AppData\Local\Temp\\nhauv.exe "C:\Users\Admin\AppData\Local\Temp\0c91b2693e862d98f906e59a70301a9a79cf906994d25aae83b0dc088d927b79.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:1080
  - - \??\c:\Program Files\dpsunzrm\ulmz.exe
      "c:\Program Files\dpsunzrm\ulmz.exe" "c:\Program Files\dpsunzrm\ulmzl.dll",Compliance C:\Users\Admin\AppData\Local\Temp\nhauv.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 use of AdjustPrivilegeToken
      PID:404
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 404 -s 1544
        5⤵
        Program crash
        
        PID:3140

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 404 -ip 404
1⤵
PID:632

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

ulmzl.dll

Path C:\Program Files\dpsunzrm\ulmzl.dll
Size 141KB
SHA256 28c49787c773317edc7e2330f4a0f6e41d6bed0577102c31c33b6922becee60f
MD5 12a9bfc9b92966cc61625d75c565194f
SHA1 8a5a80bbafe38330b37b484fe5a5da3b60f7a780
SHA512 1807088730a316a4c70d0ef2d7d89fa472d89ffe5bb41e202d9ca40f7de62027ada79468714824a5913762f298eb26196ce96598f3757e09cc8976ff685ebd25
SSDEEP 3072:RGmRmNJToTJfp2D1QzpSyiJEkGSPf1bc4l2:RGMmfToTJY6zpSyvkGSn1tl2
TLSH
T144E312E0E3A7C4B6C2695B3183937DF3161CF4346B18072EED62A32769394C44B9DA1A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

nhauv.exe

Path C:\Users\Admin\AppData\Local\Temp\nhauv.exe
Size 237KB
SHA256 dc1431815809f7f49ae977e86b2f548024ec637cf601f5e9d87050204efa9136
MD5 bdb9e403ac78bd0796c781087579decf
SHA1 d57293a149f252ae5cb50499bc2b2142d0164f20
SHA512 9e3f81a600752bfa96d33b2fd0385d03aec2158329140c49f33af2161a220e59188b35f998b5ed05999b51d0fb122597c2fd3244a0f1b2f5889789a1b06cdce1
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkTFKx:X2vnSwjaOcADw9cUeCOfW
TLSH
T178340200D7B2E5E8D448247A0787D310EAE5DCDE7F73677183D5E22FAB41F1AA4AA190
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ulmz.exe

Path \??\c:\Program Files\dpsunzrm\ulmz.exe
Size 40KB
SHA256 8dcaeeebef9b9f3d41d295db145ffb3850f309d089c08125c7fa7034db5fd80e
MD5 22bb5bd901d8b25ac5b41edbb7d5053e
SHA1 8a935dd8d7e104fc553ff7e8b54a404f7b079334
SHA512 cc3fb68fd6791a08e4a7d1a8db8d07cfcc8c9b9dceec10b53f0cb7ee86473303a19be4f23e379f84c59e02d0568e7c066e21cd1300f6032dac4ba52f609f62e7
SSDEEP 768:C67uhQpPPp0nnqFk509FRdVcQX6N58hJYim1jLP3RRe:C67uhQpXp0nnqa5093jKNAmB3RR
TLSH
T10C134C02BE88C071DDA114B41A5DB337939DED604B1586D3593887EBAA2D3E39E343DE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/404-19-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/404-21-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/1080-8-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/1080-9-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/1080-15-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/3840-0-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/3840-1-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/3840-2-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/3840-4-0x0000000000400000-0x000000000044901D-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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