farfli | b4ff31f5e7e0cf03ae5a97c4e52d1d448ddd2a532912b0cba9479567ddf08c68

Analysis

max time kernel
150s
max time network
149s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
18/04/2026, 10:32

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General

Target
2026-04-18_38f3c84d03e6d224a73ee1b8cc239c6e_coinminer_elex_wannacry.exe
Size 294KB
Sample260418-mk8baacz2x
SHA256 b4ff31f5e7e0cf03ae5a97c4e52d1d448ddd2a532912b0cba9479567ddf08c68
MD5 38f3c84d03e6d224a73ee1b8cc239c6e
SHA1 5c9e638a72b0423c7fe42ce5dbbec155f3f8eadb
SHA512 a073bd88b92bd1ce569899409f424fc591e3cf82dd1af1033a270bbcbac34192721ea8136f3e35c196967a35975551a4fd5e0a11152f15b66f729a8f4da4486f
SSDEEP 3072:qtaoOzbY5l/Tx1DUDcbouGYefD5h1zZCBgb3EInA3rdCKA9bwpfMrgsAHuskkycc:qtatPE5Txvev1zQBgexOdw6rpI9Fs29o
TLSH
T155547C1233E44869E4EA3A72CE76A630D7F6EC75AC33D67B03D4430E5A36A04CB55366
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery farfli persistence spyware stealer upx

Malware Config

Signatures

Family: Farfli
Farfli is a Windows backdoor written in C++.
backdoor farfli

Detects Farfli Backdoor 3 IoCs

resource	yara_rule
behavioral2/memory/3716-15-0x0000000010000000-0x0000000010038000-memory.dmp	family_farfli
behavioral2/memory/3716-16-0x0000000010000000-0x0000000010038000-memory.dmp	family_farfli
behavioral2/memory/3716-21-0x0000000010000000-0x0000000010038000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/3716-15-0x0000000010000000-0x0000000010038000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3716-16-0x0000000010000000-0x0000000010038000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3716-21-0x0000000010000000-0x0000000010038000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 8 IoCs

resource	yara_rule
behavioral2/memory/2564-0-0x0000000000400000-0x000000000043F000-memory.dmp	UPX
behavioral2/memory/2564-2-0x0000000000400000-0x000000000043F000-memory.dmp	UPX
behavioral2/files/0x000900000002a94d-4.dat	UPX
behavioral2/memory/5032-11-0x0000000000400000-0x000000000043F000-memory.dmp	UPX
behavioral2/files/0x001a00000002b4ad-12.dat	UPX
behavioral2/memory/3716-15-0x0000000010000000-0x0000000010038000-memory.dmp	UPX
behavioral2/memory/3716-16-0x0000000010000000-0x0000000010038000-memory.dmp	UPX
behavioral2/memory/3716-21-0x0000000010000000-0x0000000010038000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
5032	tyqyz.exe

Executes dropped EXE 2 IoCs

pid	Process
5032	tyqyz.exe
3716	jac.exe

Loads dropped DLL 1 IoCs

pid	Process
3716	jac.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-1-5-21-2397528088-2630719772-1129911217-1000\Software\Microsoft\Windows\CurrentVersion\Run\Vicity = "c:\\Program Files\\xdsku\\jac.exe \"c:\\Program Files\\xdsku\\jacur.dll\",Group"	jac.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)	\??\p:	jac.exe
File opened (read-only)	\??\t:	jac.exe
File opened (read-only)	\??\u:	jac.exe
File opened (read-only)	\??\w:	jac.exe
File opened (read-only)	\??\y:	jac.exe
File opened (read-only)	\??\z:	jac.exe
File opened (read-only)	\??\i:	jac.exe
File opened (read-only)	\??\l:	jac.exe
File opened (read-only)	\??\q:	jac.exe
File opened (read-only)	\??\s:	jac.exe
File opened (read-only)	\??\v:	jac.exe
File opened (read-only)	\??\g:	jac.exe
File opened (read-only)	\??\h:	jac.exe
File opened (read-only)	\??\k:	jac.exe
File opened (read-only)	\??\r:	jac.exe
File opened (read-only)	\??\a:	jac.exe
File opened (read-only)	\??\b:	jac.exe
File opened (read-only)	\??\e:	jac.exe
File opened (read-only)	\??\m:	jac.exe
File opened (read-only)	\??\n:	jac.exe
File opened (read-only)	\??\x:	jac.exe
File opened (read-only)	\??\j:	jac.exe
File opened (read-only)	\??\o:	jac.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	jac.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x001a00000002b4ad-12.dat	upx
behavioral2/memory/3716-15-0x0000000010000000-0x0000000010038000-memory.dmp	upx
behavioral2/memory/3716-16-0x0000000010000000-0x0000000010038000-memory.dmp	upx
behavioral2/memory/3716-21-0x0000000010000000-0x0000000010038000-memory.dmp	upx

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\xdsku\jac.exe	tyqyz.exe
File opened for modification	\??\c:\Program Files\xdsku	tyqyz.exe
File created	\??\c:\Program Files\xdsku\jacur.dll	tyqyz.exe
File created	\??\c:\Program Files\xdsku\jac.exe	tyqyz.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	tyqyz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jac.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-18_38f3c84d03e6d224a73ee1b8cc239c6e_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
4216	cmd.exe
5036	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	jac.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	jac.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
5036	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3716	jac.exe
3716	jac.exe
3716	jac.exe
3716	jac.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3716	jac.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2564	2026-04-18_38f3c84d03e6d224a73ee1b8cc239c6e_coinminer_elex_wannacry.exe
5032	tyqyz.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2564 wrote to memory of 4216	2564	2026-04-18_38f3c84d03e6d224a73ee1b8cc239c6e_coinminer_elex_wannacry.exe	79
PID 4216 wrote to memory of 5036	4216	cmd.exe	81
PID 4216 wrote to memory of 5032	4216	cmd.exe	82
PID 5032 wrote to memory of 3716	5032	tyqyz.exe	83

C:\Users\Admin\AppData\Local\Temp\2026-04-18_38f3c84d03e6d224a73ee1b8cc239c6e_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-18_38f3c84d03e6d224a73ee1b8cc239c6e_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2564
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\tyqyz.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-18_38f3c84d03e6d224a73ee1b8cc239c6e_coinminer_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4216
- - 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:5036
- - C:\Users\Admin\AppData\Local\Temp\tyqyz.exe
    C:\Users\Admin\AppData\Local\Temp\\tyqyz.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-18_38f3c84d03e6d224a73ee1b8cc239c6e_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:5032
  - - \??\c:\Program Files\xdsku\jac.exe
      "c:\Program Files\xdsku\jac.exe" "c:\Program Files\xdsku\jacur.dll",Group C:\Users\Admin\AppData\Local\Temp\tyqyz.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:3716

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

jac.exe

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

Submit Download

tyqyz.exe

Path C:\Users\Admin\AppData\Local\Temp\tyqyz.exe
Size 294KB
SHA256 989b783d41c1cf3d264e88fc17e760cd103f5e439819e0d2d025bf26756879da
MD5 acccb2f61e96cecc680c6d615c3c4570
SHA1 02ffd30807341cb09b9e6e6a19ad153f48fab3c4
SHA512 8f88c0e214ba0e93fe6bdce04626a6e7137e611cfa8fb454cfd00333712709caf546e000942ab479076e1d78310898f9f8c94f6e931579608f64976f8215d662
SSDEEP 3072:qtaoOzbY5l/Tx1DUDcbouGYefD5h1zZCBgb3EInA3rdCKA9bwpfMrgsAHuskkycT:qtatPE5Txvev1zQBgexOdw6rpI9Fs29v
TLSH
T1D5547C1233E44869E4EA3A72CE76A630D7F6EC75AC33D67B03D4430E5A36A04CB55366
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

jacur.dll

Path \??\c:\Program Files\xdsku\jacur.dll
Size 97KB
SHA256 5dd1a25dea8ad64946b6f8faa3c788ee9d144b1679614fc2232c97f9b7b90fb9
MD5 6da08ec0535797c4f792b5893f61746c
SHA1 d26a7341679e99a6262434fa6c879c996efa6b37
SHA512 9b1e6b3c8630790731009f1d03301c8b364a9a9c2e4c38d58475404e2350be4320bceb2af2a9bc18fa1fc210d8ebb0e4a26350f4b3106235f056c4f2ba42bdd3
SSDEEP 3072:BDpG6gzgHr5tCmfk455ecDBkdq+SStvAbG1:5pG6Sg9txRk/SS6bG1
TLSH
T19FA301FA290D7DD6CB354839D6528E35FA29EE348C589F887ECE6C13ACB8510E1641F1
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2564-0-0x0000000000400000-0x000000000043F000-memory.dmp

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memory/2564-2-0x0000000000400000-0x000000000043F000-memory.dmp

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memory/3716-15-0x0000000010000000-0x0000000010038000-memory.dmp

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memory/3716-16-0x0000000010000000-0x0000000010038000-memory.dmp

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memory/3716-17-0x0000000002A60000-0x0000000002AC4000-memory.dmp

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memory/3716-21-0x0000000010000000-0x0000000010038000-memory.dmp

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memory/5032-11-0x0000000000400000-0x000000000043F000-memory.dmp

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memory/5032-10-0x0000000002240000-0x00000000022BC000-memory.dmp

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