farfli | 35fbd78b00061a8241d20d0c9e084ff3897620bc5ba40e9fdcbd0510c87077be

Analysis

max time kernel
148s
max time network
143s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260618-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260618-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
29/06/2026, 00:59

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General

Target
2026-06-27_fd2c33434aeb4ea754609da5a684a331_coinminer_elex_wannacry.exe
Size 233KB
Sample260629-bcb3bshz4x
SHA256 35fbd78b00061a8241d20d0c9e084ff3897620bc5ba40e9fdcbd0510c87077be
MD5 fd2c33434aeb4ea754609da5a684a331
SHA1 1d64906564ad181b38d0f42a925337919688e681
SHA512 b537d141320ac32e89f133703dd9f7f329e08e4e8f6285f485a771a66e36e1d33a2d42ba551bb6a6f2003c4615fc904a96ac79df42fb83653e24d247dadaf8c6
SSDEEP 6144:eMgmYA/npA6SUqfjKfr4QdsICWkZ3h1SLCDFqnetKSoc:tgmYA/nsYf8QdsINkZ6CQetF
TLSH
T13F34F18136A5CD77F0621B7E4D7B163A8537BE690B00B48BD3C4AD5FB4319E46E2E209
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery 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
behavioral2/memory/2108-11-0x0000000010000000-0x000000001006D000-memory.dmp	family_farfli
behavioral2/memory/2108-14-0x0000000010000000-0x000000001006D000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/2108-11-0x0000000010000000-0x000000001006D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2108-14-0x0000000010000000-0x000000001006D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2092-0-0x0000000000400000-0x0000000000468000-memory.dmp	UPX
behavioral2/memory/2092-2-0x0000000000400000-0x0000000000468000-memory.dmp	UPX
behavioral2/files/0x0012000000019ca6-3.dat	UPX
behavioral2/memory/1240-7-0x0000000000400000-0x0000000000468000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
1240	phulzst.exe

Executes dropped EXE 2 IoCs

pid	Process
1240	phulzst.exe
2108	yfwba.exe

Loads dropped DLL 1 IoCs

pid	Process
2108	yfwba.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-1-5-21-537605601-1362463912-856654178-1000\Software\Microsoft\Windows\CurrentVersion\Run\it = "c:\\Program Files\\nrkthngu\\yfwba.exe \"c:\\Program Files\\nrkthngu\\yfwba.dll\",Interface"	yfwba.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)	\??\h:	yfwba.exe
File opened (read-only)	\??\p:	yfwba.exe
File opened (read-only)	\??\u:	yfwba.exe
File opened (read-only)	\??\v:	yfwba.exe
File opened (read-only)	\??\d:	yfwba.exe
File opened (read-only)	\??\k:	yfwba.exe
File opened (read-only)	\??\l:	yfwba.exe
File opened (read-only)	\??\g:	yfwba.exe
File opened (read-only)	\??\i:	yfwba.exe
File opened (read-only)	\??\m:	yfwba.exe
File opened (read-only)	\??\q:	yfwba.exe
File opened (read-only)	\??\r:	yfwba.exe
File opened (read-only)	\??\t:	yfwba.exe
File opened (read-only)	\??\x:	yfwba.exe
File opened (read-only)	\??\y:	yfwba.exe
File opened (read-only)	\??\a:	yfwba.exe
File opened (read-only)	\??\b:	yfwba.exe
File opened (read-only)	\??\j:	yfwba.exe
File opened (read-only)	\??\n:	yfwba.exe
File opened (read-only)	\??\o:	yfwba.exe
File opened (read-only)	\??\s:	yfwba.exe
File opened (read-only)	\??\w:	yfwba.exe
File opened (read-only)	\??\z:	yfwba.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	yfwba.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\nrkthngu	phulzst.exe
File created	\??\c:\Program Files\nrkthngu\yfwba.dll	phulzst.exe
File created	\??\c:\Program Files\nrkthngu\yfwba.exe	phulzst.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	phulzst.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yfwba.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-06-27_fd2c33434aeb4ea754609da5a684a331_coinminer_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
5100	cmd.exe
616	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	yfwba.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	yfwba.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
616	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2108	yfwba.exe
2108	yfwba.exe
2108	yfwba.exe
2108	yfwba.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2108	yfwba.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2092	2026-06-27_fd2c33434aeb4ea754609da5a684a331_coinminer_elex_wannacry.exe
1240	phulzst.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2092 wrote to memory of 5100	2092	2026-06-27_fd2c33434aeb4ea754609da5a684a331_coinminer_elex_wannacry.exe	89
PID 5100 wrote to memory of 616	5100	cmd.exe	91
PID 5100 wrote to memory of 1240	5100	cmd.exe	92
PID 1240 wrote to memory of 2108	1240	phulzst.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-06-27_fd2c33434aeb4ea754609da5a684a331_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-06-27_fd2c33434aeb4ea754609da5a684a331_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2092
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\phulzst.exe "C:\Users\Admin\AppData\Local\Temp\2026-06-27_fd2c33434aeb4ea754609da5a684a331_coinminer_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:5100
- - 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:616
- - C:\Users\Admin\AppData\Local\Temp\phulzst.exe
    C:\Users\Admin\AppData\Local\Temp\\phulzst.exe "C:\Users\Admin\AppData\Local\Temp\2026-06-27_fd2c33434aeb4ea754609da5a684a331_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:1240
  - - \??\c:\Program Files\nrkthngu\yfwba.exe
      "c:\Program Files\nrkthngu\yfwba.exe" "c:\Program Files\nrkthngu\yfwba.dll",Interface C:\Users\Admin\AppData\Local\Temp\phulzst.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:2108

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

yfwba.exe

Path C:\Program Files\nrkthngu\yfwba.exe
Size 51KB
SHA256 ce6bb7eddc83762c708d4a41709ae00371dbdc09b2a380f28fa60b1edf917473
MD5 2e068ce2770fde8d1af4cb114b98df1f
SHA1 b6f9c2775babb025b22f915c3047aa627d07c312
SHA512 998d695eb56375e63df7db16740b89deb2cf630ccbead8bcf84a921ec6f4a4f9aef2755b703f7190f332b2008ebcc949363bcf8f392d7d07246c255b5073ed35
SSDEEP 1536:6G9yoVEpHP29I3fbcJboSUge5N+CnC/maz9Rh:8pv2mbcJboce58wvOR
TLSH
T137336C236A0A49B3DFE231780A9D7232526DD862075541F7A61057EAFD243E2EE743CF
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

phulzst.exe

Path C:\Users\Admin\AppData\Local\Temp\phulzst.exe
Size 234KB
SHA256 fa56f2d0e2a9123e06f38f60dc6772e8ed6fc49b484270d20708b63e73f0d124
MD5 dcebc8d41c12c3d5d1cc8e076746dd52
SHA1 072042330219374e902fddd17cab206c9ecf3e5b
SHA512 7c069122c96bcdd13566d141cfb09d7b42d607f9c88451d1d4933d88594937b6b35f9e2b731d3bce962e3254bb51f2899d1cdb9ac3b95f5e1127aaff72f3b88a
SSDEEP 6144:eMgmYA/npA6SUqfjKfr4QdsICWkZ3h1SLCDFqnetKSocU:tgmYA/nsYf8QdsINkZ6CQetFW
TLSH
T1B634F18136A5CD77F0621B7E4D7B163B8536BE691B00B48BD3C4AD4FB4319E46E2E209
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

yfwba.dll

Path \??\c:\Program Files\nrkthngu\yfwba.dll
Size 168KB
SHA256 c1358429c3ac4e7f64359d8ae8c9456afad980e076b0f14a4a639edaa7bfcede
MD5 82fbaa47a294330d6d85e8eeecbe2a7e
SHA1 efed9cfd4739e614fbcc65450063b296044dd028
SHA512 adeb6125a072e3f6b73dd91651cd52d93713349fa66c54648a97fe8b1812799dd6235ba55b2c73b46108fed1e65463f51d977d2c00987c8ce02ebd7ff1857c3c
SSDEEP 3072:S25S8qsPfVoCxEI5GRycgzQkf2+JKC8L1MwwYsg89R5gZMR:SJ8T1xE3ocg9f2nfLnwYsxf2Zm
TLSH
T18AF312D3EFB649E0C0361BB07C53C10FB8620CA498715B5552D9BEEA3DA668E493D3A1
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1240-7-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/2092-0-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/2092-2-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/2108-10-0x0000000010000000-0x000000001006D000-memory.dmp

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memory/2108-11-0x0000000010000000-0x000000001006D000-memory.dmp

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memory/2108-14-0x0000000010000000-0x000000001006D000-memory.dmp

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