farfli | e6c79934f66a65ec4be708686eded0b22f829c54bb3a403c85e70a2cb9c43441

Analysis

max time kernel
149s
max time network
140s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
23/05/2026, 22:11

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General

Target
2026-05-23_d8afb72c7ace0a87da7400b82baed6eb_elex_wannacry.exe
Size 160KB
Sample260523-14bcjsbt8j
SHA256 e6c79934f66a65ec4be708686eded0b22f829c54bb3a403c85e70a2cb9c43441
MD5 d8afb72c7ace0a87da7400b82baed6eb
SHA1 3de7a40079d8eb4c1e29e8df002507070002bdac
SHA512 97b0d847a6b961baacbf6c983429cfb488cfe47bd06e3430172bf663a65a4381cf92b39ab2b541ac77f9dd173b71d3f6baade17282cfc458ce2804fbba1fdf03
SSDEEP 1536:fli0XaKn5gYkqDqgEeEHgUyQLrdcUcsA08IzYJzKsoVXOeqD7hi/x0rTE86mwYUi:di0XaKncqY31L2WXb0E86mwYUi
TLSH
T1F8F37C26E7A58542E3B24F7046A35B63AF71FC145AED8B4F7740A35E9838F00ED29364
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

aspackv2 backdoor bootkit discovery farfli gh0strat persistence rat spyware stealer

Malware Config

Extracted

Family

gh0strat

67.229.62.194:3201
http://67.229.62.197:805/index.php
http://67.229.62.198:803/

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 7 IoCs

resource	yara_rule
behavioral1/memory/548-13-0x0000000010000000-0x0000000010036000-memory.dmp	family_farfli
behavioral1/memory/548-14-0x0000000010000000-0x0000000010036000-memory.dmp	family_farfli
behavioral1/memory/548-15-0x0000000010000000-0x0000000010036000-memory.dmp	family_farfli
behavioral1/memory/548-16-0x0000000010000000-0x0000000010036000-memory.dmp	family_farfli
behavioral1/memory/548-18-0x0000000010000000-0x0000000010036000-memory.dmp	family_farfli
behavioral1/memory/548-19-0x0000000010000000-0x0000000010036000-memory.dmp	family_farfli
behavioral1/memory/548-20-0x0000000010000000-0x0000000010036000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 7 IoCs

resource	yara_rule
behavioral1/memory/548-13-0x0000000010000000-0x0000000010036000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/548-14-0x0000000010000000-0x0000000010036000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/548-15-0x0000000010000000-0x0000000010036000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/548-16-0x0000000010000000-0x0000000010036000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/548-18-0x0000000010000000-0x0000000010036000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/548-19-0x0000000010000000-0x0000000010036000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/548-20-0x0000000010000000-0x0000000010036000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
3	548	rundll32.exe
40	548	rundll32.exe
41	548	rundll32.exe
42	548	rundll32.exe
51	548	rundll32.exe
58	548	rundll32.exe
73	548	rundll32.exe
87	548	rundll32.exe

ASPack v2.12-2.42 1 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

resource	yara_rule
behavioral1/files/0x0008000000024358-10.dat	aspack_v212_v242

Deletes itself 1 IoCs

pid	Process
2304	yfldz.exe

Executes dropped EXE 1 IoCs

pid	Process
2304	yfldz.exe

Loads dropped DLL 1 IoCs

pid	Process
548	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-1-5-21-668679576-120646659-2289335452-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\qmrgc\\dgrsh.dll\",AbortProc"	rundll32.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)	\??\r:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	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

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	yfldz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-05-23_d8afb72c7ace0a87da7400b82baed6eb_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

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
556	cmd.exe
2728	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2728	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
548	rundll32.exe
548	rundll32.exe
548	rundll32.exe
548	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	548	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3908	2026-05-23_d8afb72c7ace0a87da7400b82baed6eb_elex_wannacry.exe
2304	yfldz.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3908 wrote to memory of 556	3908	2026-05-23_d8afb72c7ace0a87da7400b82baed6eb_elex_wannacry.exe	88
PID 556 wrote to memory of 2728	556	cmd.exe	91
PID 556 wrote to memory of 2304	556	cmd.exe	92
PID 2304 wrote to memory of 548	2304	yfldz.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-05-23_d8afb72c7ace0a87da7400b82baed6eb_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-23_d8afb72c7ace0a87da7400b82baed6eb_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3908
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\yfldz.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-23_d8afb72c7ace0a87da7400b82baed6eb_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:556
- - 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:2728
- - \??\c:\yfldz.exe
    c:\yfldz.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-23_d8afb72c7ace0a87da7400b82baed6eb_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2304
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\qmrgc\dgrsh.dll",AbortProc c:\yfldz.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 behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:548

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

yfldz.exe

Path C:\yfldz.exe
Size 160KB
SHA256 bfa35630db099d9fb442dd1771b5007907ac8b9f0a154116dff341e24dcbbbc9
MD5 3fc493edde1279d0e44a5a635127a239
SHA1 08b10fb09c8a936cf57f1a322b034f0f0b27241c
SHA512 0201e1588e2477ba2eec128263bdc3a081f770b6340ea16cbe7aac471dfe69485c3740ab1a6fb5157f407007012bfa499c143f50762bfc29b8e1d62ef05a2c7b
SSDEEP 1536:fli0XaKn5gYkqDqgEeEHgUyQLrdcUcsA08IzYJzKsoVXOeqD7hi/x0rTE86mwYUk:di0XaKncqY31L2WXb0E86mwYUir
TLSH
T161F37C26E7A58542E3B24F7046A35B63AF71FC145AED8B4F7740A35E9838F00ED29364
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

dgrsh.dll

Path \??\c:\qmrgc\dgrsh.dll
Size 87KB
SHA256 37ab4b7ee8f6b61c3854af4ed4676fd0d69f0260fb1296ad75e57aa08e1eeb03
MD5 a2c2137ff7abf6be6bcae4252c394a69
SHA1 07b402104df563f9486c2eef975fee70f65a5145
SHA512 5d05ed7c55bee8f41502acaea3d41fcf4421ad641d43f0b97b4cdc8fe584983da7712c561a53b708e88391df7929914746115700ae733155418693bcec6989a9
SSDEEP 1536:Z9f99U7uHXjIdqsxng0ZsiG4gYV82mwx86aY1Enb0jv4WDBT:bfTVHXEdqRYu2mwxB11EbiT1
TLSH
T10B93E08EBFD80A7FC6BF123244A7D636D2723C117B199D5231DE8E1F38561096B0A768
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/548-16-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/548-12-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/548-13-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/548-14-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/548-15-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/548-18-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/548-19-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/548-20-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/2304-7-0x0000000000400000-0x0000000000428000-memory.dmp

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memory/2304-9-0x0000000000400000-0x0000000000428000-memory.dmp

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memory/3908-1-0x0000000000405000-0x0000000000406000-memory.dmp

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memory/3908-0-0x0000000000400000-0x0000000000428000-memory.dmp

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memory/3908-3-0x0000000000400000-0x0000000000428000-memory.dmp

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