farfli | 6edd31b5327e77d9caa4f917828c5333d7e5d7e4eb575504ddb0ca65084bf866

Analysis

max time kernel
148s
max time network
149s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
20/08/2026, 23:55

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General

Target
2026-08-20_85c5cb8160ee303dcceab7ebb4588547_coinminer_elex_wannacry.exe
Size 280KB
Sample260820-3ytcaacm4y
SHA256 6edd31b5327e77d9caa4f917828c5333d7e5d7e4eb575504ddb0ca65084bf866
MD5 85c5cb8160ee303dcceab7ebb4588547
SHA1 7919a05b7d4461b9ead36354aed7ed823e312525
SHA512 cd440b515c795b11b629c9c96fea42050b3efac242c1166823c806e15f8f98af7d369acd510f36844864118ef79333308636a0aaa37a329e4eeb59525486e3c7
SSDEEP 6144:btatPE5TxMe5sCcuYtbVmylSc0fKOjptn9M:IPwT6sQu8IyEc0fKOjpdm
TLSH
T1CA547C1272E048D6D1C96673CEB7AB74D3F9ED678D359AAB0BD8320D0E36940C217366
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution 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/4892-11-0x0000000010000000-0x0000000010034000-memory.dmp	family_farfli
behavioral2/memory/4892-13-0x0000000010000000-0x0000000010034000-memory.dmp	family_farfli
behavioral2/memory/4892-16-0x0000000010000000-0x0000000010034000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/4892-11-0x0000000010000000-0x0000000010034000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4892-13-0x0000000010000000-0x0000000010034000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4892-16-0x0000000010000000-0x0000000010034000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 9 IoCs

resource	yara_rule
behavioral2/memory/4452-0-0x0000000000400000-0x000000000045C000-memory.dmp	UPX
behavioral2/memory/4452-2-0x0000000000400000-0x000000000045C000-memory.dmp	UPX
behavioral2/files/0x0008000000016cfd-3.dat	UPX
behavioral2/memory/3296-7-0x0000000000400000-0x000000000045C000-memory.dmp	UPX
behavioral2/files/0x000e00000001c3d2-8.dat	UPX
behavioral2/memory/4892-10-0x0000000010000000-0x0000000010034000-memory.dmp	UPX
behavioral2/memory/4892-11-0x0000000010000000-0x0000000010034000-memory.dmp	UPX
behavioral2/memory/4892-13-0x0000000010000000-0x0000000010034000-memory.dmp	UPX
behavioral2/memory/4892-16-0x0000000010000000-0x0000000010034000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
3296	pyxfapw.exe

Executes dropped EXE 2 IoCs

pid	Process
3296	pyxfapw.exe
4892	guw.exe

Loads dropped DLL 1 IoCs

pid	Process
4892	guw.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-1-5-21-3611646547-550105268-947503007-1000\Software\Microsoft\Windows\CurrentVersion\Run\OneMeture = "c:\\Program Files\\dflsd\\guw.exe \"c:\\Program Files\\dflsd\\guwjt.dll\",getPlus"	guw.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:	guw.exe
File opened (read-only)	\??\r:	guw.exe
File opened (read-only)	\??\s:	guw.exe
File opened (read-only)	\??\a:	guw.exe
File opened (read-only)	\??\b:	guw.exe
File opened (read-only)	\??\q:	guw.exe
File opened (read-only)	\??\u:	guw.exe
File opened (read-only)	\??\v:	guw.exe
File opened (read-only)	\??\w:	guw.exe
File opened (read-only)	\??\y:	guw.exe
File opened (read-only)	\??\g:	guw.exe
File opened (read-only)	\??\h:	guw.exe
File opened (read-only)	\??\i:	guw.exe
File opened (read-only)	\??\j:	guw.exe
File opened (read-only)	\??\l:	guw.exe
File opened (read-only)	\??\t:	guw.exe
File opened (read-only)	\??\x:	guw.exe
File opened (read-only)	\??\z:	guw.exe
File opened (read-only)	\??\d:	guw.exe
File opened (read-only)	\??\m:	guw.exe
File opened (read-only)	\??\n:	guw.exe
File opened (read-only)	\??\k:	guw.exe
File opened (read-only)	\??\o:	guw.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	guw.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4452-0-0x0000000000400000-0x000000000045C000-memory.dmp	upx
behavioral2/memory/4452-2-0x0000000000400000-0x000000000045C000-memory.dmp	upx
behavioral2/files/0x0008000000016cfd-3.dat	upx
behavioral2/memory/3296-7-0x0000000000400000-0x000000000045C000-memory.dmp	upx

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\dflsd	pyxfapw.exe
File created	\??\c:\Program Files\dflsd\guwjt.dll	pyxfapw.exe
File created	\??\c:\Program Files\dflsd\guw.exe	pyxfapw.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
4384	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	2026-08-20_85c5cb8160ee303dcceab7ebb4588547_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	pyxfapw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	guw.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
4384	cmd.exe
4548	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	guw.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	guw.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4548	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4892	guw.exe
4892	guw.exe
4892	guw.exe
4892	guw.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4892	guw.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4452	2026-08-20_85c5cb8160ee303dcceab7ebb4588547_coinminer_elex_wannacry.exe
3296	pyxfapw.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4452 wrote to memory of 4384	4452	2026-08-20_85c5cb8160ee303dcceab7ebb4588547_coinminer_elex_wannacry.exe	89
PID 4384 wrote to memory of 4548	4384	cmd.exe	91
PID 4384 wrote to memory of 3296	4384	cmd.exe	92
PID 3296 wrote to memory of 4892	3296	pyxfapw.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-20_85c5cb8160ee303dcceab7ebb4588547_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-20_85c5cb8160ee303dcceab7ebb4588547_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4452
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\pyxfapw.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-20_85c5cb8160ee303dcceab7ebb4588547_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:4384
- - 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:4548
- - C:\Users\Admin\AppData\Local\Temp\pyxfapw.exe
    C:\Users\Admin\AppData\Local\Temp\\pyxfapw.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-20_85c5cb8160ee303dcceab7ebb4588547_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:3296
  - - \??\c:\Program Files\dflsd\guw.exe
      "c:\Program Files\dflsd\guw.exe" "c:\Program Files\dflsd\guwjt.dll",getPlus C:\Users\Admin\AppData\Local\Temp\pyxfapw.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:4892

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

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

guw.exe

Path C:\Program Files\dflsd\guw.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

pyxfapw.exe

Path C:\Users\Admin\AppData\Local\Temp\pyxfapw.exe
Size 280KB
SHA256 5a5e796f0e05e2199019bdb6a03407182ff0a51b6135de3a5dd8ab9e3d340f7a
MD5 325d3a5eb21e9ee62a970bdd5bfc7417
SHA1 ca005ec1736e66665eb859cfef689dd971bc6c9e
SHA512 59cfcb496a9c7354dc7f290b893e784fc863d0de0b163dc2101a612ea97ad178bb01cae07c9b3383df0d4a9f0f746215c37308322084d8370df410edecb7e4e7
SSDEEP 6144:btatPE5TxMe5sCcuYtbVmylSc0fKOjptn9:IPwT6sQu8IyEc0fKOjpd
TLSH
T1E8547C1272E048D6D1C96673CEB7AB74D3F9ED678D359AAB0BD8320D0E36940C217366
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

guwjt.dll

Path \??\c:\Program Files\dflsd\guwjt.dll
Size 91KB
SHA256 921701b23a8d5860476d30863da8c5d09eb27e01d4bfc0c7b58f8f717cb77d85
MD5 decc8b0362eecbe8a59b096fd62d81ee
SHA1 f813f530760f45d1709ebc33ad1d0c3018f3d3fc
SHA512 15a34f6293e3c18082b0b62e099a488fff89e94e7a082a814df18642790360484819ce1377b4173de339aa095b51fc6aa79854617d31da3dc8122cf9a60e5d69
SSDEEP 1536:EZQUlsWDkPJE0s0Late/traNh74O/oxvtVBL6KBY4e13qTbT12cUX9wENr9a9M:0pK9PJEszl4hv8rh6KfegTn1y9f9a9M
TLSH
T16E9302CE14C619DED58885711A23E870C414EC0A5FC1E33DCAAACEF17CB75DEA4299B6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3296-7-0x0000000000400000-0x000000000045C000-memory.dmp

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memory/4452-0-0x0000000000400000-0x000000000045C000-memory.dmp

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memory/4452-2-0x0000000000400000-0x000000000045C000-memory.dmp

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memory/4892-10-0x0000000010000000-0x0000000010034000-memory.dmp

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memory/4892-11-0x0000000010000000-0x0000000010034000-memory.dmp

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memory/4892-13-0x0000000010000000-0x0000000010034000-memory.dmp

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memory/4892-16-0x0000000010000000-0x0000000010034000-memory.dmp

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