farfli | 4fc931fe01974bcdc15f18b4fbe3fc439eef1c9a9e2462e08222f2a684abdf16

Analysis

max time kernel
149s
max time network
129s
platform
windows11-21h2_x64
resource
win11-20260513-en
resource tags

arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
22/05/2026, 23:04

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General

Target
2026-05-22_07441615c40ccaa02fe4281f6ec0f9c7_elex_wannacry.exe
Size 115KB
Sample260522-219avaat8t
SHA256 4fc931fe01974bcdc15f18b4fbe3fc439eef1c9a9e2462e08222f2a684abdf16
MD5 07441615c40ccaa02fe4281f6ec0f9c7
SHA1 1b16ba920276f4276f2d948c1bf1a71a95a5dce9
SHA512 90168e5faeeabf49d7ee8970c746a2f14b041316656db26f7d8ed915d33b7d541b07a93f133efd38d83221bbe0069807c2e5aa664fbfb9d1984af5b787fa95e6
SSDEEP 1536:gWCfpn0RbXfmvElSdwS4ytneUDy9ZkM4A3FaJw/xfPWMywTM:gWmpn0RbXNxeeJ9w7EPWMywo
TLSH
T1B4C3C0136BAE44FAE0200D7505BA1B3543BA785A2B245777D384ED1EB872EC4EC3D35A
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery farfli gh0strat persistence rat spyware stealer

Malware Config

Extracted

Family

gh0strat

host123.zz.am:6658
http://23.104.160.115:8890/version.php
http://23.104.160.116:9963/

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/6128-10-0x0000000010000000-0x0000000010045000-memory.dmp	family_farfli
behavioral2/memory/6128-9-0x0000000010000000-0x0000000010045000-memory.dmp	family_farfli
behavioral2/memory/6128-11-0x0000000010000000-0x0000000010045000-memory.dmp	family_farfli
behavioral2/memory/6128-13-0x0000000010000000-0x0000000010045000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 4 IoCs

resource	yara_rule
behavioral2/memory/6128-10-0x0000000010000000-0x0000000010045000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/6128-9-0x0000000010000000-0x0000000010045000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/6128-11-0x0000000010000000-0x0000000010045000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/6128-13-0x0000000010000000-0x0000000010045000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Badlisted process makes network request 3 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
1	6128	rundll32.exe
4	6128	rundll32.exe
5	6128	rundll32.exe

Executes dropped EXE 1 IoCs

pid	Process
4860	gvulq.exe

Loads dropped DLL 1 IoCs

pid	Process
6128	rundll32.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-1-5-21-2746394149-3500112804-1243524366-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\hzlvi\\mrwah.dll\",AbortProc"	rundll32.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)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.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	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
5056	6128	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	2026-05-22_07441615c40ccaa02fe4281f6ec0f9c7_elex_wannacry.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	gvulq.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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
5928	cmd.exe
3732	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	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3732	PING.EXE

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	6128	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1144	2026-05-22_07441615c40ccaa02fe4281f6ec0f9c7_elex_wannacry.exe
4860	gvulq.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1144 wrote to memory of 5928	1144	2026-05-22_07441615c40ccaa02fe4281f6ec0f9c7_elex_wannacry.exe	80
PID 5928 wrote to memory of 3732	5928	cmd.exe	82
PID 5928 wrote to memory of 4860	5928	cmd.exe	83
PID 4860 wrote to memory of 6128	4860	gvulq.exe	84

C:\Users\Admin\AppData\Local\Temp\2026-05-22_07441615c40ccaa02fe4281f6ec0f9c7_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-22_07441615c40ccaa02fe4281f6ec0f9c7_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1144
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\gvulq.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-22_07441615c40ccaa02fe4281f6ec0f9c7_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:5928
- - 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:3732
- - \??\c:\gvulq.exe
    c:\gvulq.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-22_07441615c40ccaa02fe4281f6ec0f9c7_elex_wannacry.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4860
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\hzlvi\mrwah.dll",AbortProc c:\gvulq.exe
      4⤵
      Badlisted process makes network request
      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:6128
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 6128 -s 1420
        5⤵
        Program crash
        
        PID:5056

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 6128 -ip 6128
1⤵
PID:5904

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

gvulq.exe

Path C:\gvulq.exe
Size 115KB
SHA256 059d2f4892f43358125f74df606d6c262ba567760cd1c5c5c0c75182c313932d
MD5 59e546e74f96960d1e1cf124a0219627
SHA1 da0a45f58646693de8eebdf4d506d7bafe0fa4a4
SHA512 5216d54e1980b8f30db10f82b4da5ea1eb3d5c521c2c194db423646c1997a4cdf7209cb51a41529f2bd2381eb52479c44a114e41eefa153f499e8c26327486c0
SSDEEP 1536:gWCfpn0RbXfmvElSdwS4ytneUDy9ZkM4A3FaJw/xfPWMywTr:gWmpn0RbXNxeeJ9w7EPWMywX
TLSH
T145C3CF136BAE44FAE0200D7505BA1B3543BA685A3B145777D388ED1EF872EC4EC3D256
MD5 SHA1 SHA512 SSDEEP TLSH

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mrwah.dll

Path \??\c:\hzlvi\mrwah.dll
Size 60KB
SHA256 42304221991ff2ea9d6c0252d42b90390caebc312a17126a4b13e9514f2b7d87
MD5 75e08aa9274df390fcdb1df3d0733bd5
SHA1 f3053cc10f33436aa1da7ec82a12ffdaff10ccfb
SHA512 dee8a07ca2142eb2ec1a5ce56af92605bb1c11e89da5d4335aee1098dc73375e422d9c53f201e571ff64b51c5cfa3928b1f26c0a23f4671dfbd91b1355d0e9db
SSDEEP 1536:Itj4HbqT+M0L2J2US62eSBQno/CUVzsxeOPw:ItqeT+M02J25qnLUVzs9w
TLSH
T1D05301286F6D2EDDFA3152B1E0985093FBD98B03043FA24D2544777F7D829631A93BA4
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/6128-7-0x0000000010000000-0x0000000010045000-memory.dmp

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memory/6128-10-0x0000000010000000-0x0000000010045000-memory.dmp

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memory/6128-9-0x0000000010000000-0x0000000010045000-memory.dmp

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memory/6128-8-0x00000000022E0000-0x00000000022E1000-memory.dmp

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memory/6128-11-0x0000000010000000-0x0000000010045000-memory.dmp

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memory/6128-12-0x00000000022E0000-0x00000000022E1000-memory.dmp

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memory/6128-13-0x0000000010000000-0x0000000010045000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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