farfli | 5232410ebf8f37ef8b5859b10f6042f36e7f11d1b06f0835c960a777a6169cb9

General

Target
2026-08-03_3fb42045ac941444e5f3d67229e86da2_coinminer_elex_wannacry.exe
Size 311KB
Sample260803-la5xqsfc82
SHA256 5232410ebf8f37ef8b5859b10f6042f36e7f11d1b06f0835c960a777a6169cb9
MD5 3fb42045ac941444e5f3d67229e86da2
SHA1 841fee94e97175e64b6f76cf3bac9c5c62c982ca
SHA512 609e77fa013983154e7cb0e95ee3ae29f6db26a38eed96894ecc013fe96f533178b7f5938b199242ca0bcdaf8103027337392a8f932c5d91d8109c680068203e
SSDEEP 6144:VRoSgW/zYds0SfxsTxt3YeWH8k+p+Nj8DmILo:ASf/zc8GrYdcb88DBE
TLSH
T1F264BE2332D008ABC1E67A73CEB67734E3F9F9A489319A6F57D8094D5E36E448711326
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli gh0strat persistence rat spyware stealer upx

Malware Config

Extracted

Family

gh0strat

C2

host123.zz.am:6658
http://107.163.43.235:12388/
http://107.163.43.236:10289/support.php

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
behavioral1/memory/4312-11-0x0000000010000000-0x000000001004B000-memory.dmp	family_farfli
behavioral1/memory/4312-12-0x0000000010000000-0x000000001004B000-memory.dmp	family_farfli
behavioral1/memory/4312-14-0x0000000010000000-0x000000001004B000-memory.dmp	family_farfli
behavioral1/memory/4312-17-0x0000000010000000-0x000000001004B000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 4 IoCs

resource	yara_rule
behavioral1/memory/4312-11-0x0000000010000000-0x000000001004B000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4312-12-0x0000000010000000-0x000000001004B000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4312-14-0x0000000010000000-0x000000001004B000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4312-17-0x0000000010000000-0x000000001004B000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/files/0x001c000000024309-1.dat	UPX
behavioral1/files/0x000300000001e6da-8.dat	UPX
behavioral1/memory/4312-11-0x0000000010000000-0x000000001004B000-memory.dmp	UPX
behavioral1/memory/4312-12-0x0000000010000000-0x000000001004B000-memory.dmp	UPX
behavioral1/memory/4312-14-0x0000000010000000-0x000000001004B000-memory.dmp	UPX
behavioral1/memory/4312-17-0x0000000010000000-0x000000001004B000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
1488	yzucd.exe

Executes dropped EXE 2 IoCs

pid	Process
1488	yzucd.exe
4312	vkkjwoax.exe

Loads dropped DLL 1 IoCs

pid	Process
4312	vkkjwoax.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-1-5-21-876885714-46325919-1482798410-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\flate = "c:\\Program Files\\zrgsyowbf\\vkkjwoax.exe \"c:\\Program Files\\zrgsyowbf\\vkkjwoax.dll\",inflate"	vkkjwoax.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:	vkkjwoax.exe
File opened (read-only)	\??\j:	vkkjwoax.exe
File opened (read-only)	\??\m:	vkkjwoax.exe
File opened (read-only)	\??\r:	vkkjwoax.exe
File opened (read-only)	\??\s:	vkkjwoax.exe
File opened (read-only)	\??\v:	vkkjwoax.exe
File opened (read-only)	\??\w:	vkkjwoax.exe
File opened (read-only)	\??\a:	vkkjwoax.exe
File opened (read-only)	\??\e:	vkkjwoax.exe
File opened (read-only)	\??\h:	vkkjwoax.exe
File opened (read-only)	\??\n:	vkkjwoax.exe
File opened (read-only)	\??\o:	vkkjwoax.exe
File opened (read-only)	\??\i:	vkkjwoax.exe
File opened (read-only)	\??\p:	vkkjwoax.exe
File opened (read-only)	\??\q:	vkkjwoax.exe
File opened (read-only)	\??\u:	vkkjwoax.exe
File opened (read-only)	\??\z:	vkkjwoax.exe
File opened (read-only)	\??\g:	vkkjwoax.exe
File opened (read-only)	\??\k:	vkkjwoax.exe
File opened (read-only)	\??\l:	vkkjwoax.exe
File opened (read-only)	\??\t:	vkkjwoax.exe
File opened (read-only)	\??\x:	vkkjwoax.exe
File opened (read-only)	\??\y:	vkkjwoax.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	vkkjwoax.exe

UPX packed file 6 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/files/0x001c000000024309-1.dat	upx
behavioral1/files/0x000300000001e6da-8.dat	upx
behavioral1/memory/4312-11-0x0000000010000000-0x000000001004B000-memory.dmp	upx
behavioral1/memory/4312-12-0x0000000010000000-0x000000001004B000-memory.dmp	upx
behavioral1/memory/4312-14-0x0000000010000000-0x000000001004B000-memory.dmp	upx
behavioral1/memory/4312-17-0x0000000010000000-0x000000001004B000-memory.dmp	upx

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\zrgsyowbf	yzucd.exe
File created	\??\c:\Program Files\zrgsyowbf\vkkjwoax.dll	yzucd.exe
File created	\??\c:\Program Files\zrgsyowbf\vkkjwoax.exe	yzucd.exe
File opened for modification	\??\c:\Program Files\zrgsyowbf\vkkjwoax.exe	yzucd.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
2700	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	yzucd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vkkjwoax.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-03_3fb42045ac941444e5f3d67229e86da2_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
2700	cmd.exe
3636	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	vkkjwoax.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	vkkjwoax.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3636	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4312	vkkjwoax.exe
4312	vkkjwoax.exe
4312	vkkjwoax.exe
4312	vkkjwoax.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4312	vkkjwoax.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4140	2026-08-03_3fb42045ac941444e5f3d67229e86da2_coinminer_elex_wannacry.exe
1488	yzucd.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4140 wrote to memory of 2700	4140	2026-08-03_3fb42045ac941444e5f3d67229e86da2_coinminer_elex_wannacry.exe	88
PID 2700 wrote to memory of 3636	2700	cmd.exe	90
PID 2700 wrote to memory of 1488	2700	cmd.exe	91
PID 1488 wrote to memory of 4312	1488	yzucd.exe	92

C:\Users\Admin\AppData\Local\Temp\2026-08-03_3fb42045ac941444e5f3d67229e86da2_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-03_3fb42045ac941444e5f3d67229e86da2_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4140
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\yzucd.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-03_3fb42045ac941444e5f3d67229e86da2_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:2700
- - 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:3636
- - C:\Users\Admin\AppData\Local\Temp\yzucd.exe
    C:\Users\Admin\AppData\Local\Temp\\yzucd.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-03_3fb42045ac941444e5f3d67229e86da2_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:1488
  - - \??\c:\Program Files\zrgsyowbf\vkkjwoax.exe
      "c:\Program Files\zrgsyowbf\vkkjwoax.exe" "c:\Program Files\zrgsyowbf\vkkjwoax.dll",inflate C:\Users\Admin\AppData\Local\Temp\yzucd.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:4312

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

vkkjwoax.exe

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

Submit Download

yzucd.exe

Path C:\Users\Admin\AppData\Local\Temp\yzucd.exe
Size 311KB
SHA256 5724480d2069821dc930cd0a405070866adc81c0a686c76bb566e2819aa0ae86
MD5 fb5b10c6e0141ac70bbc96788a79e07c
SHA1 2b7101ae492857d8d5bb77f9859fbae5f8cf0697
SHA512 ad227e182ef7b8699dd966544230093dda9c15d22c12eef4dc47342c12c5693be25b4d59ce56017f9661a75b3a68c6486eeb7c5f92655f3659f00e89bd58772a
SSDEEP 6144:VRoSgW/zYds0SfxsTxt3YeWH8k+p+Nj8DmILA:ASf/zc8GrYdcb88DBM
TLSH
T1AD64BE2332D008ABC1E67A73CEB67734E3F9F9A489319A6F57D8094D5E36E448711326
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

vkkjwoax.dll

Path \??\c:\Program Files\zrgsyowbf\vkkjwoax.dll
Size 134KB
SHA256 68260854bc8b1b8929a2c0be525e5213b754f1dd65a0402b96a159d3cd0e8f00
MD5 8e10b323a37838e831711f9d010c5803
SHA1 a9c8fe97f817e2429d50b49f415c6b10bbf95a77
SHA512 faaed08a99f4fba1952298888a95d832e0ed8dd0af0715e2c11eee2f000cfc42f1b3fa174dea4b177340024539d9b0c5ab8c391d212699418ed7404b736bca12
SSDEEP 3072:Mz9IOfAdv1qacKNQTtP0KuYjbi7Gp0N9DLn:MzOOfAdv1XaPduYjbEfn
TLSH
T1AED312519C0990AAC480753EF44EF7A11A3A8614807E134F649FE3E398F5696BB2C85A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4312-11-0x0000000010000000-0x000000001004B000-memory.dmp

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memory/4312-12-0x0000000010000000-0x000000001004B000-memory.dmp

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memory/4312-14-0x0000000010000000-0x000000001004B000-memory.dmp

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memory/4312-17-0x0000000010000000-0x000000001004B000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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