farfli | 11a757915312e6fd8a0f9b9b87492959a239be5f7395e0e3d42ba4d3434ddf0f

Analysis

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

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
21/04/2026, 22:40

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General

Target
2026-04-21_f626ba4e982ead6a7c7d5d2685f4b9c8_coinminer_elex_wannacry.exe
Size 289KB
Sample260421-2lpb5ads6m
SHA256 11a757915312e6fd8a0f9b9b87492959a239be5f7395e0e3d42ba4d3434ddf0f
MD5 f626ba4e982ead6a7c7d5d2685f4b9c8
SHA1 66d48c64dcd18ee643c8929422009b3b034d7b82
SHA512 8a3ed519b3104906fc0f81662210322584ac44e14d5099b05dbae76e76aa2299ba38637f2625f7b023dd2af91936e17f92e1a7f054fee9b0b52935da4bc90b48
SSDEEP 3072:qtaoOzbY5l/Tx1DUDcbouGYefD5h1zZCBgb3EInA3rdCKA9bwpfMrgsAHuskkycP:qtatPE5Txvev1zQBgexOdw6rpI9Fs29
TLSH
T1F4547C1233E44869E4EA3E72CE76A630D7FAE875AC33D67B03D4430D5A36A04CB55366
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 2 IoCs

resource	yara_rule
behavioral2/memory/1692-19-0x0000000010000000-0x0000000010038000-memory.dmp	family_farfli
behavioral2/memory/1692-25-0x0000000010000000-0x0000000010038000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/1692-19-0x0000000010000000-0x0000000010038000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1692-25-0x0000000010000000-0x0000000010038000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Custom signature

UPX dump on OEP (original entry point) 8 IoCs

resource	yara_rule
behavioral2/memory/2340-0-0x0000000000400000-0x000000000043F000-memory.dmp	UPX
behavioral2/memory/2340-3-0x0000000000400000-0x000000000043F000-memory.dmp	UPX
behavioral2/files/0x000900000000d3db-5.dat	UPX
behavioral2/memory/4408-12-0x0000000000400000-0x000000000043F000-memory.dmp	UPX
behavioral2/files/0x001a00000002b30c-13.dat	UPX
behavioral2/memory/1692-16-0x0000000010000000-0x0000000010038000-memory.dmp	UPX
behavioral2/memory/1692-19-0x0000000010000000-0x0000000010038000-memory.dmp	UPX
behavioral2/memory/1692-25-0x0000000010000000-0x0000000010038000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
4408	dvfxu.exe

Executes dropped EXE 2 IoCs

pid	Process
4408	dvfxu.exe
1692	mwy.exe

Loads dropped DLL 1 IoCs

pid	Process
1692	mwy.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-1-5-21-3119821332-640943685-2562343641-1000\Software\Microsoft\Windows\CurrentVersion\Run\Vicity = "c:\\Program Files\\jniop\\mwy.exe \"c:\\Program Files\\jniop\\mwyot.dll\",Group"	mwy.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:	mwy.exe
File opened (read-only)	\??\x:	mwy.exe
File opened (read-only)	\??\e:	mwy.exe
File opened (read-only)	\??\j:	mwy.exe
File opened (read-only)	\??\n:	mwy.exe
File opened (read-only)	\??\w:	mwy.exe
File opened (read-only)	\??\z:	mwy.exe
File opened (read-only)	\??\b:	mwy.exe
File opened (read-only)	\??\y:	mwy.exe
File opened (read-only)	\??\l:	mwy.exe
File opened (read-only)	\??\m:	mwy.exe
File opened (read-only)	\??\o:	mwy.exe
File opened (read-only)	\??\q:	mwy.exe
File opened (read-only)	\??\r:	mwy.exe
File opened (read-only)	\??\s:	mwy.exe
File opened (read-only)	\??\t:	mwy.exe
File opened (read-only)	\??\v:	mwy.exe
File opened (read-only)	\??\a:	mwy.exe
File opened (read-only)	\??\g:	mwy.exe
File opened (read-only)	\??\h:	mwy.exe
File opened (read-only)	\??\i:	mwy.exe
File opened (read-only)	\??\k:	mwy.exe
File opened (read-only)	\??\p:	mwy.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	mwy.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x001a00000002b30c-13.dat	upx
behavioral2/memory/1692-16-0x0000000010000000-0x0000000010038000-memory.dmp	upx
behavioral2/memory/1692-19-0x0000000010000000-0x0000000010038000-memory.dmp	upx
behavioral2/memory/1692-25-0x0000000010000000-0x0000000010038000-memory.dmp	upx

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\jniop	dvfxu.exe
File created	\??\c:\Program Files\jniop\mwyot.dll	dvfxu.exe
File created	\??\c:\Program Files\jniop\mwy.exe	dvfxu.exe
File opened for modification	\??\c:\Program Files\jniop\mwy.exe	dvfxu.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	dvfxu.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mwy.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-21_f626ba4e982ead6a7c7d5d2685f4b9c8_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
2708	cmd.exe
4644	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	mwy.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	mwy.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4644	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1692	mwy.exe
1692	mwy.exe
1692	mwy.exe
1692	mwy.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1692	mwy.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2340	2026-04-21_f626ba4e982ead6a7c7d5d2685f4b9c8_coinminer_elex_wannacry.exe
4408	dvfxu.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2340 wrote to memory of 2708	2340	2026-04-21_f626ba4e982ead6a7c7d5d2685f4b9c8_coinminer_elex_wannacry.exe	77
PID 2708 wrote to memory of 4644	2708	cmd.exe	79
PID 2708 wrote to memory of 4408	2708	cmd.exe	80
PID 4408 wrote to memory of 1692	4408	dvfxu.exe	81

C:\Users\Admin\AppData\Local\Temp\2026-04-21_f626ba4e982ead6a7c7d5d2685f4b9c8_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-21_f626ba4e982ead6a7c7d5d2685f4b9c8_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2340
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\dvfxu.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-21_f626ba4e982ead6a7c7d5d2685f4b9c8_coinminer_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2708
- - 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:4644
- - C:\Users\Admin\AppData\Local\Temp\dvfxu.exe
    C:\Users\Admin\AppData\Local\Temp\\dvfxu.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-21_f626ba4e982ead6a7c7d5d2685f4b9c8_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:4408
  - - \??\c:\Program Files\jniop\mwy.exe
      "c:\Program Files\jniop\mwy.exe" "c:\Program Files\jniop\mwyot.dll",Group C:\Users\Admin\AppData\Local\Temp\dvfxu.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:1692

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

Replay Monitor

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Downloads

mwy.exe

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

Submit Download

dvfxu.exe

Path C:\Users\Admin\AppData\Local\Temp\dvfxu.exe
Size 289KB
SHA256 a7ac8c05cbcb08f76fbdfbaf2744a1fddfbbde47e3657f7416abe012db70df28
MD5 cd2c26e70829254244771f27d36cd467
SHA1 b172be26a7e6f80bc29ce7cb6360022400b3112b
SHA512 38dad8994ecde3e15513b741ed8bc55d1918aac59d1efd63c8ff392db8ca4702638ea558372f0a5413b2c4229abad437dedbabc5c49e6f1bd79e9d610ca0c8e7
SSDEEP 3072:qtaoOzbY5l/Tx1DUDcbouGYefD5h1zZCBgb3EInA3rdCKA9bwpfMrgsAHuskkycY:qtatPE5Txvev1zQBgexOdw6rpI9Fs29k
TLSH
T1B4547C1233E44869E4EA3E72CE76A630D7FAE875AC33D67B03D4430D5A36A04CB55366
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

mwyot.dll

Path \??\c:\Program Files\jniop\mwyot.dll
Size 97KB
SHA256 45631751b301899f595ed9d9348d9566d24de379c3e7b08eeac8cba78befa769
MD5 341c01a0347819c7734126ba0e791283
SHA1 15cceaf363975bc666d879e8de414d7ae82e8dc3
SHA512 9a808071874a0206dd56f47c2baca097e00baa5c1808abd2b67d50235000c4494bcf0bb537513900c202ca18f6b478a26bb0ad18b4a409879dfe81b611af1aa7
SSDEEP 3072:BDpG6gzgHr5tCmfk455ecDBkdq+SStvAbGN:5pG6Sg9txRk/SS6bGN
TLSH
T1F6A301F6290D7DD6CB35483AD6628E35F629EE348C589F887ECE6C13ACB8510E1641F1
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1692-16-0x0000000010000000-0x0000000010038000-memory.dmp

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memory/1692-19-0x0000000010000000-0x0000000010038000-memory.dmp

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memory/1692-18-0x0000000001480000-0x000000000155F000-memory.dmp

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memory/1692-25-0x0000000010000000-0x0000000010038000-memory.dmp

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memory/2340-0-0x0000000000400000-0x000000000043F000-memory.dmp

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memory/2340-3-0x0000000000400000-0x000000000043F000-memory.dmp

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memory/2340-2-0x0000000000AE0000-0x0000000000BBF000-memory.dmp

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memory/4408-12-0x0000000000400000-0x000000000043F000-memory.dmp

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memory/4408-11-0x00000000009A0000-0x0000000000A7F000-memory.dmp

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