farfli | 3b5fbf83c5edb545f91c4d1b275e46b1abcf917cd93bb8f4a22a5c7cdcfcf791

General

Target
2026-07-17_6b7ca6f8e8491fff5b9cf671f965f327_coinminer_elex_wannacry.exe
Size 231KB
Sample260717-2jfbfafz2p
SHA256 3b5fbf83c5edb545f91c4d1b275e46b1abcf917cd93bb8f4a22a5c7cdcfcf791
MD5 6b7ca6f8e8491fff5b9cf671f965f327
SHA1 44ae1a354c4189ead5bd15601183b5809886c975
SHA512 998be20a5e9ff849963de769d5b0e5478ffaacbae95ef93c2e89718c2f059839b8282f04e9572b55d57f19f31228bb9133fc12f53f6c952b76a251f27d457e9e
SSDEEP 6144:yOFgmYA/npA6SUqfjKfr4QdsICWkZ3h1SLCDFqnetKSo:zgmYA/nsYf8QdsINkZ6CQetF
TLSH
T17A34E18136A9DD77F062177E4C7B163B8536BE650B00B48BD3C4AD5FB4319E46E2E209
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli gh0strat persistence rat spyware stealer

Malware Config

Extracted

Family

gh0strat

C2

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/1816-9-0x0000000010000000-0x000000001006D000-memory.dmp	family_farfli
behavioral2/memory/1816-11-0x0000000010000000-0x000000001006D000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/1816-9-0x0000000010000000-0x000000001006D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1816-11-0x0000000010000000-0x000000001006D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 1 IoCs

resource	yara_rule
behavioral2/files/0x000d00000001b89b-1.dat	UPX

Deletes itself 1 IoCs

pid	Process
5752	krefjakp.exe

Executes dropped EXE 2 IoCs

pid	Process
5752	krefjakp.exe
1816	zyl.exe

Loads dropped DLL 1 IoCs

pid	Process
1816	zyl.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-1-5-21-3797332335-34111092-3597280141-1000\Software\Microsoft\Windows\CurrentVersion\Run\it = "c:\\Program Files\\ksrptpe\\zyl.exe \"c:\\Program Files\\ksrptpe\\zylql.dll\",Interface"	zyl.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)	\??\k:	zyl.exe
File opened (read-only)	\??\m:	zyl.exe
File opened (read-only)	\??\w:	zyl.exe
File opened (read-only)	\??\x:	zyl.exe
File opened (read-only)	\??\z:	zyl.exe
File opened (read-only)	\??\r:	zyl.exe
File opened (read-only)	\??\t:	zyl.exe
File opened (read-only)	\??\y:	zyl.exe
File opened (read-only)	\??\g:	zyl.exe
File opened (read-only)	\??\i:	zyl.exe
File opened (read-only)	\??\j:	zyl.exe
File opened (read-only)	\??\l:	zyl.exe
File opened (read-only)	\??\o:	zyl.exe
File opened (read-only)	\??\u:	zyl.exe
File opened (read-only)	\??\a:	zyl.exe
File opened (read-only)	\??\b:	zyl.exe
File opened (read-only)	\??\h:	zyl.exe
File opened (read-only)	\??\n:	zyl.exe
File opened (read-only)	\??\p:	zyl.exe
File opened (read-only)	\??\q:	zyl.exe
File opened (read-only)	\??\s:	zyl.exe
File opened (read-only)	\??\v:	zyl.exe
File opened (read-only)	\??\d:	zyl.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	zyl.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\ksrptpe	krefjakp.exe
File created	\??\c:\Program Files\ksrptpe\zylql.dll	krefjakp.exe
File created	\??\c:\Program Files\ksrptpe\zyl.exe	krefjakp.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
4940	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	2026-07-17_6b7ca6f8e8491fff5b9cf671f965f327_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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	krefjakp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	zyl.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
4940	cmd.exe
4784	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	zyl.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	zyl.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4784	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1816	zyl.exe
1816	zyl.exe
1816	zyl.exe
1816	zyl.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1816	zyl.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1748	2026-07-17_6b7ca6f8e8491fff5b9cf671f965f327_coinminer_elex_wannacry.exe
5752	krefjakp.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1748 wrote to memory of 4940	1748	2026-07-17_6b7ca6f8e8491fff5b9cf671f965f327_coinminer_elex_wannacry.exe	89
PID 4940 wrote to memory of 4784	4940	cmd.exe	91
PID 4940 wrote to memory of 5752	4940	cmd.exe	92
PID 5752 wrote to memory of 1816	5752	krefjakp.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-07-17_6b7ca6f8e8491fff5b9cf671f965f327_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-17_6b7ca6f8e8491fff5b9cf671f965f327_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1748
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\krefjakp.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-17_6b7ca6f8e8491fff5b9cf671f965f327_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:4940
- - 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:4784
- - C:\Users\Admin\AppData\Local\Temp\krefjakp.exe
    C:\Users\Admin\AppData\Local\Temp\\krefjakp.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-17_6b7ca6f8e8491fff5b9cf671f965f327_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:5752
  - - \??\c:\Program Files\ksrptpe\zyl.exe
      "c:\Program Files\ksrptpe\zyl.exe" "c:\Program Files\ksrptpe\zylql.dll",Interface C:\Users\Admin\AppData\Local\Temp\krefjakp.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:1816

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

Replay Monitor

Loading Replay Monitor...

Downloads

zyl.exe

Path C:\Program Files\ksrptpe\zyl.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

krefjakp.exe

Path C:\Users\Admin\AppData\Local\Temp\krefjakp.exe
Size 231KB
SHA256 33cd27e30736578ce366ccc9bc516de6eb8cb76f4cd7cc0db4be74014db3034c
MD5 866acb365ee824eef144d5092ec0bc3e
SHA1 5e181cd7f16afa62c771cb73d46a4ffb9d7b1e24
SHA512 aec48ae6f8ea1512227bcb5ec56eeed4f5868390945573265dab38ab4f13cdd4edbcee28eec0c467e64df86a75b3bd3d91d8d5b17632ca9601a2a3fbff46fc0e
SSDEEP 6144:yOFgmYA/npA6SUqfjKfr4QdsICWkZ3h1SLCDFqnetKSoJ:zgmYA/nsYf8QdsINkZ6CQetFg
TLSH
T1A234E18136A9DD77F0621B7E4C7B163A8536BE650B00B48BD3C4AD5FB4319E46E2E209
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

zylql.dll

Path \??\c:\Program Files\ksrptpe\zylql.dll
Size 168KB
SHA256 4af0a6f49039e009ed2332ce677e759b466b3ca4705a4b37e6a34290c1d9b6bc
MD5 f11d270d646c55f53f52802ccdbba19b
SHA1 60320dc281ed2b97f414c203c6f3b34c8732df52
SHA512 d730d43f39327ead98c3d6d92aa75a6843f49446b135258d47478180978ce10c3123351397b239e52597fe3a207a52b39b0f1bfeb68268b9f7428295a2f64754
SSDEEP 3072:S25S8qsPfVoCxEI5GRycgzQkf2+JKC8L1MwwYsg89R5gZMe:SJ8T1xE3ocg9f2nfLnwYsxf2ZD
TLSH
T13EF302D3EFB649E0C0361BB06C53C10FB8620C6498725B5652D9FEEA3DA668E453D3A1
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1816-7-0x0000000010000000-0x000000001006D000-memory.dmp

Download

memory/1816-9-0x0000000010000000-0x000000001006D000-memory.dmp

Download

memory/1816-11-0x0000000010000000-0x000000001006D000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads