farfli | 6d9c9abc5be67c8671eb15b1381688b13de1ca62918485a429e76101b269e255

Analysis

max time kernel
149s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
03/08/2026, 08:42

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General

Target
2026-08-03_f6fe2153ac68fc085b8a733adc51e600_coinminer_elex_wannacry.exe
Size 296KB
Sample260803-kl32vaeh22
SHA256 6d9c9abc5be67c8671eb15b1381688b13de1ca62918485a429e76101b269e255
MD5 f6fe2153ac68fc085b8a733adc51e600
SHA1 807cbad091f054437a63ef1230dfc0f2b09f97ba
SHA512 fb86708ded67aa2cc87176f502dbe54d6464f387cd38cce8cfcd3de08cb05fc88fb61b87f89abcb2603a26b488c1fe9beadce8492586e00dc347d5e341937cb6
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrO:ywLcCmuErglr73aAD+
TLSH
T13C540282E502DF07EC3FC7B6813E5E291217AF521B705593D3C4B91E66B3682B63A0D9
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 6 IoCs

resource	yara_rule
behavioral1/memory/1016-12-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/1016-15-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/1016-16-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/1016-19-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/1016-21-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/1016-22-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 6 IoCs

resource	yara_rule
behavioral1/memory/1016-12-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1016-15-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1016-16-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1016-19-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1016-21-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1016-22-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/4140-0-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral1/memory/4140-2-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral1/files/0x001000000001e83c-4.dat	UPX
behavioral1/memory/4700-7-0x0000000000400000-0x0000000000483000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
13	1016	rundll32.exe
37	1016	rundll32.exe
38	1016	rundll32.exe
39	1016	rundll32.exe
58	1016	rundll32.exe
59	1016	rundll32.exe
62	1016	rundll32.exe
68	1016	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4700	oyjqr.exe

Executes dropped EXE 1 IoCs

pid	Process
4700	oyjqr.exe

Loads dropped DLL 1 IoCs

pid	Process
1016	rundll32.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-1-5-21-1788976790-1541110888-1636651838-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Wetor = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\ekqva\\wxgof.dll\",GetProc"	rundll32.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)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.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	rundll32.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/4140-0-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral1/memory/4140-2-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral1/files/0x001000000001e83c-4.dat	upx
behavioral1/memory/4700-7-0x0000000000400000-0x0000000000483000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\ekqva	oyjqr.exe
File created	\??\c:\Program Files\ekqva\wxgof.dll	oyjqr.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
4668	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	2026-08-03_f6fe2153ac68fc085b8a733adc51e600_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	oyjqr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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
4668	cmd.exe
1824	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	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1824	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1016	rundll32.exe
1016	rundll32.exe
1016	rundll32.exe
1016	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1016	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4140	2026-08-03_f6fe2153ac68fc085b8a733adc51e600_coinminer_elex_wannacry.exe
4700	oyjqr.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4140 wrote to memory of 4668	4140	2026-08-03_f6fe2153ac68fc085b8a733adc51e600_coinminer_elex_wannacry.exe	84
PID 4668 wrote to memory of 1824	4668	cmd.exe	86
PID 4668 wrote to memory of 4700	4668	cmd.exe	87
PID 4700 wrote to memory of 1016	4700	oyjqr.exe	88

C:\Users\Admin\AppData\Local\Temp\2026-08-03_f6fe2153ac68fc085b8a733adc51e600_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-03_f6fe2153ac68fc085b8a733adc51e600_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4140
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\oyjqr.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-03_f6fe2153ac68fc085b8a733adc51e600_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:4668
- - 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:1824
- - C:\Users\Admin\AppData\Local\Temp\oyjqr.exe
    C:\Users\Admin\AppData\Local\Temp\\oyjqr.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-03_f6fe2153ac68fc085b8a733adc51e600_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:4700
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\ekqva\wxgof.dll",GetProc C:\Users\Admin\AppData\Local\Temp\oyjqr.exe
      4⤵
      Badlisted process makes network request
      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:1016

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

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Downloads

oyjqr.exe

Path C:\Users\Admin\AppData\Local\Temp\oyjqr.exe
Size 296KB
SHA256 56f5c13d0e206cc8e7e54472be78581bc2b8ef9c196fbfda85c8e9e02746e806
MD5 23bc737697bb0c9a6d8afd97e1da7cc4
SHA1 e9d1220fe80be124f7a06611a9d3a40698e58580
SHA512 3fa6a8538d9abebf128ca187a9d33a9f53fa7e39b4b7e3723cae9094492f3f2467123d8376789b658869ebca62c12e37d4e24fa0cd981d80ef47fadd0250dcf8
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrOF:ywLcCmuErglr73aAD+E
TLSH
T14A540282E501CF47EC2FC7B6813E5E251217AF522B705593D3C4B91E66B3682B63E0D9
MD5 SHA1 SHA512 SSDEEP TLSH

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wxgof.dll

Path \??\c:\Program Files\ekqva\wxgof.dll
Size 218KB
SHA256 89d3e56de1fecd49b2285ca5ea16b7e7911346c13fd9bf5d7e1a09fcd5a2c527
MD5 fb410b09fa94cb910dbe3d75a3d5c493
SHA1 7b6e325cb365b11080950457816cfda5d00a7247
SHA512 ce897f4184abc7e5569ef1ebb14e460e16bf16eddca4c2066b55323f2d052166b8be7607d6784b5046427d53c7d60e4302c95d6c6962ed112c816c14d0e466b7
SSDEEP 6144:KORxNwD2VOidhzeXwddDzLi5vOQEqscr0ZTJauytL:pnNwDTi3swddDiROXIF
TLSH
T11024128BCF983873C5223379597951A0B9325290AFA1534DD2E6D34FA072BA2CF7B531
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1016-16-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1016-10-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1016-11-0x00000000010D0000-0x00000000010D1000-memory.dmp

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memory/1016-12-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1016-15-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1016-17-0x00000000010D0000-0x00000000010D1000-memory.dmp

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memory/1016-19-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1016-21-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1016-22-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4140-2-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/4140-0-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/4700-7-0x0000000000400000-0x0000000000483000-memory.dmp

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