farfli | 02e237f6836d1b9f1f16f38b1ec5b960d06e435f80fe09d877465d07973f0153

Analysis

max time kernel
149s
max time network
138s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
19/04/2026, 12:21

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General

Target
2026-04-19_0ba6648a719e6f96fba97205df71e11f_elex_wannacry.exe
Size 369KB
Sample260419-pjn75ae16w
SHA256 02e237f6836d1b9f1f16f38b1ec5b960d06e435f80fe09d877465d07973f0153
MD5 0ba6648a719e6f96fba97205df71e11f
SHA1 6415df7504873195400bd2cbad0e975090d3f646
SHA512 34073112b4ce6f1261b6bb11869e9bd0ea63ccaecc1d3b96b8e4d25c25a4aa7acb47e29e126363766e6969788c9ca3484c5f79aa622167d055272f89a508dcca
SSDEEP 6144:lpFbYirO/Vo8wjOm6JMRPzyZCJeNnTImk9dKacFK8Czj8YT4kFa9:FcirO2PE2QC00me2VCzYYT2
TLSH
T11784DF1272D048F6E4853633CE76BE74E3F9D4AC5D32DB775F98460C1E26A0993222AD
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery farfli gh0strat persistence rat spyware stealer

Malware Config

Extracted

Family

gh0strat

107.163.56.251:6658
http://107.163.56.240:18963/main.php
http://107.163.56.241:18530/

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
behavioral1/memory/632-19-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli
behavioral1/memory/632-23-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli
behavioral1/memory/632-29-0x0000000010000000-0x000000001004F000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral1/memory/632-19-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/632-23-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/632-29-0x0000000010000000-0x000000001004F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Deletes itself 1 IoCs

pid	Process
3428	nzorp.exe

Executes dropped EXE 2 IoCs

pid	Process
3428	nzorp.exe
632	pku.exe

Loads dropped DLL 1 IoCs

pid	Process
632	pku.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-1-5-21-312252282-3884318443-358092420-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\nvltu\\pku.exe \"c:\\Program Files\\nvltu\\pkukm.dll\",Compliance"	pku.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)	\??\g:	pku.exe
File opened (read-only)	\??\i:	pku.exe
File opened (read-only)	\??\r:	pku.exe
File opened (read-only)	\??\a:	pku.exe
File opened (read-only)	\??\j:	pku.exe
File opened (read-only)	\??\k:	pku.exe
File opened (read-only)	\??\p:	pku.exe
File opened (read-only)	\??\q:	pku.exe
File opened (read-only)	\??\y:	pku.exe
File opened (read-only)	\??\z:	pku.exe
File opened (read-only)	\??\b:	pku.exe
File opened (read-only)	\??\e:	pku.exe
File opened (read-only)	\??\h:	pku.exe
File opened (read-only)	\??\l:	pku.exe
File opened (read-only)	\??\n:	pku.exe
File opened (read-only)	\??\o:	pku.exe
File opened (read-only)	\??\s:	pku.exe
File opened (read-only)	\??\t:	pku.exe
File opened (read-only)	\??\m:	pku.exe
File opened (read-only)	\??\u:	pku.exe
File opened (read-only)	\??\v:	pku.exe
File opened (read-only)	\??\w:	pku.exe
File opened (read-only)	\??\x:	pku.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	pku.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	\??\c:\Program Files\nvltu\pkukm.dll	nzorp.exe
File created	\??\c:\Program Files\nvltu\pku.exe	nzorp.exe
File opened for modification	\??\c:\Program Files\nvltu\pku.exe	nzorp.exe
File opened for modification	\??\c:\Program Files\nvltu	nzorp.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	2026-04-19_0ba6648a719e6f96fba97205df71e11f_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	nzorp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pku.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
5112	cmd.exe
4176	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	pku.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	pku.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4176	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
632	pku.exe
632	pku.exe
632	pku.exe
632	pku.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	632	pku.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4952	2026-04-19_0ba6648a719e6f96fba97205df71e11f_elex_wannacry.exe
3428	nzorp.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4952 wrote to memory of 5112	4952	2026-04-19_0ba6648a719e6f96fba97205df71e11f_elex_wannacry.exe	85
PID 5112 wrote to memory of 4176	5112	cmd.exe	87
PID 5112 wrote to memory of 3428	5112	cmd.exe	88
PID 3428 wrote to memory of 632	3428	nzorp.exe	89

C:\Users\Admin\AppData\Local\Temp\2026-04-19_0ba6648a719e6f96fba97205df71e11f_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-19_0ba6648a719e6f96fba97205df71e11f_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4952
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\nzorp.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-19_0ba6648a719e6f96fba97205df71e11f_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:5112
- - 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:4176
- - C:\Users\Admin\AppData\Local\Temp\nzorp.exe
    C:\Users\Admin\AppData\Local\Temp\\nzorp.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-19_0ba6648a719e6f96fba97205df71e11f_elex_wannacry.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:3428
  - - \??\c:\Program Files\nvltu\pku.exe
      "c:\Program Files\nvltu\pku.exe" "c:\Program Files\nvltu\pkukm.dll",Compliance C:\Users\Admin\AppData\Local\Temp\nzorp.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: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

Replay Monitor

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Downloads

pku.exe

Path C:\Program Files\nvltu\pku.exe
Size 60KB
SHA256 6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910
MD5 889b99c52a60dd49227c5e485a016679
SHA1 8fa889e456aa646a4d0a4349977430ce5fa5e2d7
SHA512 08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641
SSDEEP 1536:H9ykYCTdiHQKrFXmw2RQln5IUmDjoX6+:HlMHprF2nRQln5I
TLSH
T127532AC2FA00C171D4A7563019778F1A5766AC13DB728ACB94B0B4A41EB3291AD3E5FF
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

pkukm.dll

Path C:\Program Files\nvltu\pkukm.dll
Size 179KB
SHA256 f9344949a55495ad9192de05d88719d15ab17d2284e7528527ec105f77d2ddd9
MD5 eabc2daa3bcd35947c75d2385b48bd6e
SHA1 db274788acad2480cf14b1a46357c22644b476a7
SHA512 7efbc76a040b491651d0da503352cebaeb47f617c165c389234fc9c002c80b448b4076ef9bb674a97ef89b105c2e2fff1ae394aa2aa092b100ac01f3ed1e54c7
SSDEEP 3072:EC5Wpfs98nVCWdKycHtld8VBt7NUalwXH9RqYzJabTYd3KIdj6+uFdi98pvO0hf2:ECOfQ8nVcycHrd8VBtBUa4HfRzJabT8d
TLSH
T1BE0423FABF42C652C84F6776BAAF244437A901D91BC1E0A56F0482CE39C3135E67DE48
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

nzorp.exe

Path C:\Users\Admin\AppData\Local\Temp\nzorp.exe
Size 369KB
SHA256 bcab8876dcf9a657c98bb05aa93469464672c91adee7d4c0f361db2847f78b3f
MD5 b47d980312f81757569c64d35d0a7a5f
SHA1 a06fa832c63866bd440d72c9fc3dffd81fdf033b
SHA512 0dd43da8682c8d13669f4b5d80c31461ba0d956df6feb46580642954b370e1694cdd4e531fff8d81ac5fbe634bfe264a2bfe1751f9786f5b8fdf38e224a87293
SSDEEP 6144:lpFbYirO/Vo8wjOm6JMRPzyZCJeNnTImk9dKacFK8Czj8YT4kFa91:FcirO2PE2QC00me2VCzYYT2b
TLSH
T18984DF1272D048F6E4853633CE76BE74E3F9D4AC5D32DB775F98460C1E26A0993222AD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/632-16-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/632-17-0x00000000015E0000-0x00000000015E1000-memory.dmp

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memory/632-18-0x00000000015E0000-0x00000000015E1000-memory.dmp

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memory/632-19-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/632-20-0x0000000001530000-0x00000000015AA000-memory.dmp

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memory/632-23-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/632-24-0x0000000001530000-0x00000000015AA000-memory.dmp

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memory/632-29-0x0000000010000000-0x000000001004F000-memory.dmp

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memory/3428-11-0x00000000008C0000-0x0000000000B41000-memory.dmp

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memory/3428-13-0x0000000000400000-0x0000000000458000-memory.dmp

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memory/4952-2-0x0000000000A10000-0x0000000000C91000-memory.dmp

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memory/4952-3-0x0000000000400000-0x0000000000458000-memory.dmp

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memory/4952-0-0x0000000000400000-0x0000000000458000-memory.dmp

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