farfli | b2284157eaf33881541b8a82da51da5681b7f9f944b35cfe53c0ab659c6ece18

General

Target
2026-04-17_0f691bbb1ebcec57a8fb16c45cb3fab6_coinminer_elex_wannacry.exe
Size 316KB
Sample260417-l3vbpsa16j
SHA256 b2284157eaf33881541b8a82da51da5681b7f9f944b35cfe53c0ab659c6ece18
MD5 0f691bbb1ebcec57a8fb16c45cb3fab6
SHA1 153ae55ec7728953645c3ee0f2dc7c3e0b8af109
SHA512 ab92e7953c83577992f5b9b3086a9e958113eb63bfccf9cfef3321ad2eafe5f6daa0baa22a73da4673526f2d916e7436eb9bc4322e1d644d92cec7d27bd3f17c
SSDEEP 6144:VRoSgW/zYds0SfxsTxt3YeWH8k+p+Nj8DmILVG:ASf/zc8GrYdcb88DBpG
TLSH
T1DC64BE2332D008ABC1E67A73CEB67734E3F9F9A489319A6F57D8094D5E36E448711326
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery 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 2 IoCs

resource	yara_rule
behavioral2/memory/4116-12-0x0000000010000000-0x000000001004B000-memory.dmp	family_farfli
behavioral2/memory/4116-16-0x0000000010000000-0x000000001004B000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/4116-12-0x0000000010000000-0x000000001004B000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4116-16-0x0000000010000000-0x000000001004B000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Custom signature

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/files/0x002e00000002b19f-2.dat	UPX
behavioral2/files/0x001a00000002b45b-8.dat	UPX
behavioral2/memory/4116-11-0x0000000010000000-0x000000001004B000-memory.dmp	UPX
behavioral2/memory/4116-12-0x0000000010000000-0x000000001004B000-memory.dmp	UPX
behavioral2/memory/4116-16-0x0000000010000000-0x000000001004B000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
3336	xckmy.exe

Executes dropped EXE 2 IoCs

pid	Process
3336	xckmy.exe
4116	xpal.exe

Loads dropped DLL 1 IoCs

pid	Process
4116	xpal.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-1-5-21-1383858298-2057492509-1726743289-1000\Software\Microsoft\Windows\CurrentVersion\Run\flate = "c:\\Program Files\\ooalgk\\xpal.exe \"c:\\Program Files\\ooalgk\\xpalv.dll\",inflate"	xpal.exe

Enumerates connected drives 3 TTPs 2 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)	\??\a:	xpal.exe
File opened (read-only)	\??\b:	xpal.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	xpal.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x002e00000002b19f-2.dat	upx
behavioral2/files/0x001a00000002b45b-8.dat	upx
behavioral2/memory/4116-11-0x0000000010000000-0x000000001004B000-memory.dmp	upx
behavioral2/memory/4116-12-0x0000000010000000-0x000000001004B000-memory.dmp	upx
behavioral2/memory/4116-16-0x0000000010000000-0x000000001004B000-memory.dmp	upx

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\ooalgk	xckmy.exe
File created	\??\c:\Program Files\ooalgk\xpalv.dll	xckmy.exe
File created	\??\c:\Program Files\ooalgk\xpal.exe	xckmy.exe
File opened for modification	\??\c:\Program Files\ooalgk\xpal.exe	xckmy.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1952	4116	WerFault.exe	84

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	2026-04-17_0f691bbb1ebcec57a8fb16c45cb3fab6_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	xckmy.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	xpal.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
2932	cmd.exe
3840	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	xpal.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	xpal.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3840	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4116	xpal.exe
4116	xpal.exe
4116	xpal.exe
4116	xpal.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4116	xpal.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2616	2026-04-17_0f691bbb1ebcec57a8fb16c45cb3fab6_coinminer_elex_wannacry.exe
3336	xckmy.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2616 wrote to memory of 2932	2616	2026-04-17_0f691bbb1ebcec57a8fb16c45cb3fab6_coinminer_elex_wannacry.exe	80
PID 2932 wrote to memory of 3840	2932	cmd.exe	82
PID 2932 wrote to memory of 3336	2932	cmd.exe	83
PID 3336 wrote to memory of 4116	3336	xckmy.exe	84

C:\Users\Admin\AppData\Local\Temp\2026-04-17_0f691bbb1ebcec57a8fb16c45cb3fab6_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-17_0f691bbb1ebcec57a8fb16c45cb3fab6_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2616
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\xckmy.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-17_0f691bbb1ebcec57a8fb16c45cb3fab6_coinminer_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2932
- - 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:3840
- - C:\Users\Admin\AppData\Local\Temp\xckmy.exe
    C:\Users\Admin\AppData\Local\Temp\\xckmy.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-17_0f691bbb1ebcec57a8fb16c45cb3fab6_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:3336
  - - \??\c:\Program Files\ooalgk\xpal.exe
      "c:\Program Files\ooalgk\xpal.exe" "c:\Program Files\ooalgk\xpalv.dll",inflate C:\Users\Admin\AppData\Local\Temp\xckmy.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:4116
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4116 -s 1600
        5⤵
        Program crash
        
        PID:1952

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4116 -ip 4116
1⤵
PID:1048

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

xpal.exe

Path C:\Program Files\ooalgk\xpal.exe
Size 40KB
SHA256 8dcaeeebef9b9f3d41d295db145ffb3850f309d089c08125c7fa7034db5fd80e
MD5 22bb5bd901d8b25ac5b41edbb7d5053e
SHA1 8a935dd8d7e104fc553ff7e8b54a404f7b079334
SHA512 cc3fb68fd6791a08e4a7d1a8db8d07cfcc8c9b9dceec10b53f0cb7ee86473303a19be4f23e379f84c59e02d0568e7c066e21cd1300f6032dac4ba52f609f62e7
SSDEEP 768:C67uhQpPPp0nnqFk509FRdVcQX6N58hJYim1jLP3RRe:C67uhQpXp0nnqa5093jKNAmB3RR
TLSH
T10C134C02BE88C071DDA114B41A5DB337939DED604B1586D3593887EBAA2D3E39E343DE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

xckmy.exe

Path C:\Users\Admin\AppData\Local\Temp\xckmy.exe
Size 316KB
SHA256 e46c220ea9a015416e2230a07489b5264406b09c92c59d526c50c64326282806
MD5 9c93c6ffac3d9d0053db6dac9e6dfadf
SHA1 d8f6cb9b9079783432689fea0899071bd8fb6489
SHA512 848361cf86788790e1e513afae2f54ef30182ea1620aa653f71c20789ab47d08a1116ab2b0ed98d29d4d8ac017a8b2f5e46e50a8190488a50bae33d731e78174
SSDEEP 6144:VRoSgW/zYds0SfxsTxt3YeWH8k+p+Nj8DmILVN:ASf/zc8GrYdcb88DBpN
TLSH
T15264BE2332D008ABC1E67A73CEB67734E3F9F9A489319A6F57D8094D5E36E448711326
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

xpalv.dll

Path \??\c:\Program Files\ooalgk\xpalv.dll
Size 134KB
SHA256 d83c423d0c59c00f6f9e554aca5c81dd234ac3964e841ed375672795ca8078ef
MD5 1d5e06a4927439e3eb014a2ac095c102
SHA1 a49803e57a674cd72967de9c274882c4e4f6aa3a
SHA512 1e51c6bd4859b891163fa855571ac2c2d68a4e24264a4c14b9b708046d5983a1627729bc8bdb3254ec25a8072940102b2065385e5bda8dbcb18f223cd5d54948
SSDEEP 3072:Mz9IOfAdv1qacKNQTtP0KuYjbi7Gp0N9DLA:MzOOfAdv1XaPduYjbEfA
TLSH
T143D312559C0990AAC480753FF44EF7B11A3A8614807E134F64DFE3E398F56967B2C85A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4116-11-0x0000000010000000-0x000000001004B000-memory.dmp

Download

memory/4116-12-0x0000000010000000-0x000000001004B000-memory.dmp

Download

memory/4116-13-0x0000000002AF0000-0x0000000002BCA000-memory.dmp

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memory/4116-16-0x0000000010000000-0x000000001004B000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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