farfli | a701cb04162b30af221f04363840292cbf81eeeb97ed5660823d852721657dd3

Analysis

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

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
28/08/2026, 06:02

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General

Target
2026-08-28_f56ac9cdb48d1f6a7f25905d1916d95c_coinminer_elex_wannacry.exe
Size 243KB
Sample260828-grwm6stdnd
SHA256 a701cb04162b30af221f04363840292cbf81eeeb97ed5660823d852721657dd3
MD5 f56ac9cdb48d1f6a7f25905d1916d95c
SHA1 d92376f1c0127519e825ba0219f4a6a25f0649fd
SHA512 cb7c1913b04f772579f84f58fcff459caa7bd017d0b44e784437bb525d016c118f8692e8338cd971374f5e8def17946616c12c9a8110a907adf702b32988214a
SSDEEP 6144:eMgmYA/npA6SUqfjKfr4QdsICWkZ3h1SLCDFqnetKSo:tgmYA/nsYf8QdsINkZ6CQetF
TLSH
T14F34E1813665CDB7F4621ABD4E3B56368136BE591B00B097D3C4AD4FF434AE5AE3E208
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli gh0strat persistence rat spyware stealer

Malware Config

Extracted

Family

gh0strat

98.126.40.18:3204
http://98.126.40.19:805/index.php
http://98.126.40.20:803/

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 2 IoCs

resource	yara_rule
behavioral1/memory/4952-15-0x0000000010000000-0x000000001006D000-memory.dmp	family_farfli
behavioral1/memory/4952-18-0x0000000010000000-0x000000001006D000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral1/memory/4952-15-0x0000000010000000-0x000000001006D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4952-18-0x0000000010000000-0x000000001006D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/3440-0-0x0000000000400000-0x0000000000468000-memory.dmp	UPX
behavioral1/memory/3440-2-0x0000000000400000-0x0000000000468000-memory.dmp	UPX
behavioral1/files/0x00080000000245fb-4.dat	UPX
behavioral1/memory/4356-10-0x0000000000400000-0x0000000000468000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
4356	oqhhy.exe

Executes dropped EXE 2 IoCs

pid	Process
4356	oqhhy.exe
4952	nbi.exe

Loads dropped DLL 1 IoCs

pid	Process
4952	nbi.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-1-5-21-2937465464-4167303362-2236413517-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\it = "c:\\Program Files\\efafs\\nbi.exe \"c:\\Program Files\\efafs\\nbitx.dll\",Interface"	nbi.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)	\??\m:	nbi.exe
File opened (read-only)	\??\s:	nbi.exe
File opened (read-only)	\??\v:	nbi.exe
File opened (read-only)	\??\j:	nbi.exe
File opened (read-only)	\??\l:	nbi.exe
File opened (read-only)	\??\n:	nbi.exe
File opened (read-only)	\??\y:	nbi.exe
File opened (read-only)	\??\z:	nbi.exe
File opened (read-only)	\??\a:	nbi.exe
File opened (read-only)	\??\o:	nbi.exe
File opened (read-only)	\??\q:	nbi.exe
File opened (read-only)	\??\t:	nbi.exe
File opened (read-only)	\??\w:	nbi.exe
File opened (read-only)	\??\h:	nbi.exe
File opened (read-only)	\??\i:	nbi.exe
File opened (read-only)	\??\k:	nbi.exe
File opened (read-only)	\??\p:	nbi.exe
File opened (read-only)	\??\r:	nbi.exe
File opened (read-only)	\??\u:	nbi.exe
File opened (read-only)	\??\x:	nbi.exe
File opened (read-only)	\??\b:	nbi.exe
File opened (read-only)	\??\e:	nbi.exe
File opened (read-only)	\??\g:	nbi.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	nbi.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\efafs	oqhhy.exe
File created	\??\c:\Program Files\efafs\nbitx.dll	oqhhy.exe
File created	\??\c:\Program Files\efafs\nbi.exe	oqhhy.exe
File opened for modification	\??\c:\Program Files\efafs\nbi.exe	oqhhy.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
1156	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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	oqhhy.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nbi.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-28_f56ac9cdb48d1f6a7f25905d1916d95c_coinminer_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
1156	cmd.exe
3564	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	nbi.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	nbi.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3564	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4952	nbi.exe
4952	nbi.exe
4952	nbi.exe
4952	nbi.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4952	nbi.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3440	2026-08-28_f56ac9cdb48d1f6a7f25905d1916d95c_coinminer_elex_wannacry.exe
4356	oqhhy.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3440 wrote to memory of 1156	3440	2026-08-28_f56ac9cdb48d1f6a7f25905d1916d95c_coinminer_elex_wannacry.exe	86
PID 1156 wrote to memory of 3564	1156	cmd.exe	88
PID 1156 wrote to memory of 4356	1156	cmd.exe	89
PID 4356 wrote to memory of 4952	4356	oqhhy.exe	90

C:\Users\Admin\AppData\Local\Temp\2026-08-28_f56ac9cdb48d1f6a7f25905d1916d95c_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-28_f56ac9cdb48d1f6a7f25905d1916d95c_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3440
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\oqhhy.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-28_f56ac9cdb48d1f6a7f25905d1916d95c_coinminer_elex_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:1156
- - 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:3564
- - C:\Users\Admin\AppData\Local\Temp\oqhhy.exe
    C:\Users\Admin\AppData\Local\Temp\\oqhhy.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-28_f56ac9cdb48d1f6a7f25905d1916d95c_coinminer_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:4356
  - - \??\c:\Program Files\efafs\nbi.exe
      "c:\Program Files\efafs\nbi.exe" "c:\Program Files\efafs\nbitx.dll",Interface C:\Users\Admin\AppData\Local\Temp\oqhhy.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:4952

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

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

nbi.exe

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

Submit Download

oqhhy.exe

Path C:\Users\Admin\AppData\Local\Temp\oqhhy.exe
Size 244KB
SHA256 dd745f970b523de0f7ab6bcc517b3a291b0ce2fab20040f3d5e102838172392d
MD5 5413029444b4e1369d36f079d452c2ed
SHA1 48b0119890374f7356a7a9a9e209e7e7a1e99e45
SHA512 e22a0c3fb92d7aeb50977c318127b4f1a6b1eddf143a33bda08c13fa4a58b17af5fc464991acb40a9eb9ce734781b2113349cff751a4eaffc44acc3aa9282c16
SSDEEP 6144:eMgmYA/npA6SUqfjKfr4QdsICWkZ3h1SLCDFqnetKSon:tgmYA/nsYf8QdsINkZ6CQetFu
TLSH
T18134E1813665CDB7F4621A7D4E2B56368136BE191B047097D3C4AD4FF434AE5AE3E208
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

nbitx.dll

Path \??\c:\Program Files\efafs\nbitx.dll
Size 168KB
SHA256 be7848ef9dae3d21b0af13ed567574125442aa04610ca468d06ff06dacdb41be
MD5 72dc2661baef8f8d83de76410c1ae6fa
SHA1 5a028ced48c38576d9e482e81d6a8c5c9ccc5669
SHA512 7837abb7e598731724d03d63b4a04f4d593df4afee296b3a850b147a2c9f1bc0c105d1c4fd493be350eef21aa99b6f12a5f0df9501ed19abc51fe772adddce8a
SSDEEP 3072:S25S8qsPfVoCxEI5GRycgzQkf2+JKC8L1MwwYsg89R5gZMy:SJ8T1xE3ocg9f2nfLnwYsxf2ZX
TLSH
T1A8F312D3EFB649E0C0361BB06C53C10FB8620C6498725B5553D9FEEA3DA668E493D3A1
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3440-0-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/3440-2-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/4356-10-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/4952-14-0x0000000010000000-0x000000001006D000-memory.dmp

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memory/4952-15-0x0000000010000000-0x000000001006D000-memory.dmp

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memory/4952-18-0x0000000010000000-0x000000001006D000-memory.dmp

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