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 3 IoCs

resource	yara_rule
behavioral1/memory/3204-12-0x0000000010000000-0x000000001004B000-memory.dmp	family_farfli
behavioral1/memory/3204-14-0x0000000010000000-0x000000001004B000-memory.dmp	family_farfli
behavioral1/memory/3204-16-0x0000000010000000-0x000000001004B000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral1/memory/3204-12-0x0000000010000000-0x000000001004B000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/3204-14-0x0000000010000000-0x000000001004B000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/3204-16-0x0000000010000000-0x000000001004B000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Custom signature

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/files/0x001c000000024192-2.dat	UPX
behavioral1/files/0x00080000000242a7-8.dat	UPX
behavioral1/memory/3204-11-0x0000000010000000-0x000000001004B000-memory.dmp	UPX
behavioral1/memory/3204-12-0x0000000010000000-0x000000001004B000-memory.dmp	UPX
behavioral1/memory/3204-14-0x0000000010000000-0x000000001004B000-memory.dmp	UPX
behavioral1/memory/3204-16-0x0000000010000000-0x000000001004B000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
1384	vvfcs.exe

Executes dropped EXE 2 IoCs

pid	Process
1384	vvfcs.exe
3204	tam.exe

Loads dropped DLL 1 IoCs

pid	Process
3204	tam.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-1-5-21-2714754311-527593155-1440850301-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\flate = "c:\\Program Files\\hnsukox\\tam.exe \"c:\\Program Files\\hnsukox\\tamzm.dll\",inflate"	tam.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)	\??\u:	tam.exe
File opened (read-only)	\??\w:	tam.exe
File opened (read-only)	\??\y:	tam.exe
File opened (read-only)	\??\p:	tam.exe
File opened (read-only)	\??\e:	tam.exe
File opened (read-only)	\??\g:	tam.exe
File opened (read-only)	\??\i:	tam.exe
File opened (read-only)	\??\j:	tam.exe
File opened (read-only)	\??\n:	tam.exe
File opened (read-only)	\??\z:	tam.exe
File opened (read-only)	\??\v:	tam.exe
File opened (read-only)	\??\q:	tam.exe
File opened (read-only)	\??\b:	tam.exe
File opened (read-only)	\??\k:	tam.exe
File opened (read-only)	\??\m:	tam.exe
File opened (read-only)	\??\s:	tam.exe
File opened (read-only)	\??\t:	tam.exe
File opened (read-only)	\??\x:	tam.exe
File opened (read-only)	\??\a:	tam.exe
File opened (read-only)	\??\h:	tam.exe
File opened (read-only)	\??\l:	tam.exe
File opened (read-only)	\??\o:	tam.exe
File opened (read-only)	\??\r:	tam.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	tam.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x001c000000024192-2.dat	upx
behavioral1/files/0x00080000000242a7-8.dat	upx
behavioral1/memory/3204-11-0x0000000010000000-0x000000001004B000-memory.dmp	upx
behavioral1/memory/3204-12-0x0000000010000000-0x000000001004B000-memory.dmp	upx
behavioral1/memory/3204-14-0x0000000010000000-0x000000001004B000-memory.dmp	upx
behavioral1/memory/3204-16-0x0000000010000000-0x000000001004B000-memory.dmp	upx

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\hnsukox	vvfcs.exe
File created	\??\c:\Program Files\hnsukox\tamzm.dll	vvfcs.exe
File created	\??\c:\Program Files\hnsukox\tam.exe	vvfcs.exe
File opened for modification	\??\c:\Program Files\hnsukox\tam.exe	vvfcs.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	vvfcs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tam.exe
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

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
4448	cmd.exe
4876	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	tam.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	tam.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4876	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3204	tam.exe
3204	tam.exe
3204	tam.exe
3204	tam.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3204	tam.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4128	2026-04-17_0f691bbb1ebcec57a8fb16c45cb3fab6_coinminer_elex_wannacry.exe
1384	vvfcs.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4128 wrote to memory of 4448	4128	2026-04-17_0f691bbb1ebcec57a8fb16c45cb3fab6_coinminer_elex_wannacry.exe	84
PID 4448 wrote to memory of 4876	4448	cmd.exe	86
PID 4448 wrote to memory of 1384	4448	cmd.exe	87
PID 1384 wrote to memory of 3204	1384	vvfcs.exe	88

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:4128
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\vvfcs.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:4448
- - 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:4876
- - C:\Users\Admin\AppData\Local\Temp\vvfcs.exe
    C:\Users\Admin\AppData\Local\Temp\\vvfcs.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:1384
  - - \??\c:\Program Files\hnsukox\tam.exe
      "c:\Program Files\hnsukox\tam.exe" "c:\Program Files\hnsukox\tamzm.dll",inflate C:\Users\Admin\AppData\Local\Temp\vvfcs.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:3204

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

Replay Monitor

Loading Replay Monitor...

Downloads

tam.exe

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

Submit Download

vvfcs.exe

Path C:\Users\Admin\AppData\Local\Temp\vvfcs.exe
Size 316KB
SHA256 82d5ea1422b60235b9c9b5d58c3db6a1146e9153db5aaf1b15fab7a3b7612878
MD5 1b876ffde1e6e3fe4ca3f0d284a36245
SHA1 ad5367d1b77d3a05090c647f1b7d71392b7206fe
SHA512 3e7f22f1509f2693aa5c6e6dd37e10ed912e11f4f44503d25528a028381ad9aa41c6a91abf0b7ef3205ff5d13e0ae087457c7492622e3628f2649e39ca57339b
SSDEEP 6144:VRoSgW/zYds0SfxsTxt3YeWH8k+p+Nj8DmILVd:ASf/zc8GrYdcb88DBpd
TLSH
T18A64BE2332D008ABC1E67A73CEB57734E3FAF9A489319A6F57D8094D5E36E448711326
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

tamzm.dll

Path \??\c:\Program Files\hnsukox\tamzm.dll
Size 134KB
SHA256 74d0997ba6112a4e95e3ba6b45a701711b023040bbb96b2f2dff9bfa7f279c28
MD5 a2392e5f0b0e7af41031757a2e0f13d6
SHA1 167b2d3e4fcd89b3774d6bf1bac3a97f8846f282
SHA512 d647a535b21450d2d814d32d1c6fca80f3161f524f1ecff8e616ef447322d848cb9a199f4fadce1174b6358ff45f8e9fe6e6b62165f23a2bdb8403a14ba3fa39
SSDEEP 3072:Mz9IOfAdv1qacKNQTtP0KuYjbi7Gp0N9DLP:MzOOfAdv1XaPduYjbEfP
TLSH
T1FDD312519C0990AAC480753EF44EF7A11A398614807E138F749FE3E398F56567B2CC5A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3204-11-0x0000000010000000-0x000000001004B000-memory.dmp

Download

memory/3204-12-0x0000000010000000-0x000000001004B000-memory.dmp

Download

memory/3204-14-0x0000000010000000-0x000000001004B000-memory.dmp

Download

memory/3204-16-0x0000000010000000-0x000000001004B000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads