farfli | a10564721968c0e0c32d1bd4cbc0ea019a68a78d425a8bb88329421ccd3dd8b4

General

Target
2026-08-17_d0364c2fd558d5af1cec780525b233aa_elex_feodo_wannacry.exe
Size 105KB
Sample260817-gj5acaeq21
SHA256 a10564721968c0e0c32d1bd4cbc0ea019a68a78d425a8bb88329421ccd3dd8b4
MD5 d0364c2fd558d5af1cec780525b233aa
SHA1 040f8b8e03f2b6672a3d981106be8786128011fb
SHA512 1b13d8fe7aca98e802236be22419f430b07cfa4a63ff43721943c76607073f759fd425db0328990529043a49fb1224c817f0b83a45cd33dda88a85d3cddf8d01
SSDEEP 1536:gWCfpn0RbXfmvElSdwS4ytneUDy9ZkM4A3FaJw/xfPWMyw:gWmpn0RbXNxeeJ9w7EPWMyw
TLSH
T18CB3BF57ABAF04F9E0200D7505BA1B3647BA78562B205BB7C394ED1D6872DC0EC3D35A
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli gh0strat persistence rat spyware stealer

Malware Config

Extracted

Family

gh0strat

C2

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 3 IoCs

resource	yara_rule
behavioral2/memory/4512-8-0x0000000010000000-0x0000000010045000-memory.dmp	family_farfli
behavioral2/memory/4512-9-0x0000000010000000-0x0000000010045000-memory.dmp	family_farfli
behavioral2/memory/4512-10-0x0000000010000000-0x0000000010045000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/4512-8-0x0000000010000000-0x0000000010045000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4512-9-0x0000000010000000-0x0000000010045000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4512-10-0x0000000010000000-0x0000000010045000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Badlisted process makes network request 4 IoCs

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

flow	pid	Process
7	4512	rundll32.exe
10	4512	rundll32.exe
9	4512	rundll32.exe
11	4512	rundll32.exe

Executes dropped EXE 1 IoCs

pid	Process
4872	mrlcvji.exe

Loads dropped DLL 1 IoCs

pid	Process
4512	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-1-5-21-1014449518-1831897916-4205727055-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\ncrjqv\\aekvrv.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)	\??\b:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	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)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\s:	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

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
5172	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	2026-08-17_d0364c2fd558d5af1cec780525b233aa_elex_feodo_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	mrlcvji.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
5172	cmd.exe
3252	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
3252	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4512	rundll32.exe
4512	rundll32.exe
4512	rundll32.exe
4512	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4512	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
120	2026-08-17_d0364c2fd558d5af1cec780525b233aa_elex_feodo_wannacry.exe
4872	mrlcvji.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 120 wrote to memory of 5172	120	2026-08-17_d0364c2fd558d5af1cec780525b233aa_elex_feodo_wannacry.exe	90
PID 5172 wrote to memory of 3252	5172	cmd.exe	92
PID 5172 wrote to memory of 4872	5172	cmd.exe	93
PID 4872 wrote to memory of 4512	4872	mrlcvji.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-08-17_d0364c2fd558d5af1cec780525b233aa_elex_feodo_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-17_d0364c2fd558d5af1cec780525b233aa_elex_feodo_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:120
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\mrlcvji.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-17_d0364c2fd558d5af1cec780525b233aa_elex_feodo_wannacry.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:5172
- - 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:3252
- - \??\c:\mrlcvji.exe
    c:\mrlcvji.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-17_d0364c2fd558d5af1cec780525b233aa_elex_feodo_wannacry.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4872
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\ncrjqv\aekvrv.dll",AbortProc c:\mrlcvji.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:4512

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Peripheral Device Discovery

Query Registry

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

mrlcvji.exe

Path \??\c:\mrlcvji.exe
Size 106KB
SHA256 5d3928bc484a85f26e7120fe8f039f8568d7dd28199db054b158de197c6d2e83
MD5 f3ad1b6e1f8f474545930316efcb8f2d
SHA1 db9b41dbdb56c453c5df39da91979c0049116eeb
SHA512 754486fb9e78529efb8c16f85e3be78b6897eb90c1808042db7b52fb2ecd228fbafab7087e5342f22e9d3401f7bd3435baf0bf0662bc649c639d12f47ba76fd8
SSDEEP 1536:gWCfpn0RbXfmvElSdwS4ytneUDy9ZkM4A3FaJw/xfPWMywc:gWmpn0RbXNxeeJ9w7EPWMywc
TLSH
T1A7B3BF57ABAF04F9E0200D7505BA1B3647BA78562B205BB7C394ED1DA872DC0EC3D35A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

aekvrv.dll

Path \??\c:\ncrjqv\aekvrv.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/4512-6-0x0000000010000000-0x0000000010045000-memory.dmp

Download

memory/4512-7-0x0000000000B80000-0x0000000000B81000-memory.dmp

Download

memory/4512-8-0x0000000010000000-0x0000000010045000-memory.dmp

Download

memory/4512-9-0x0000000010000000-0x0000000010045000-memory.dmp

Download

memory/4512-10-0x0000000010000000-0x0000000010045000-memory.dmp

Download

memory/4512-11-0x0000000000B80000-0x0000000000B81000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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