farfli | fe50ea09cf0d5560c9c334f74f4e86cc6817635e643a5e8ff472ecc70a209834

General

Target
2026-08-31_1879a479fb37e456badf037cbd1d0efa_coinminer_elex_wannacry.exe
Size 154KB
Sample260831-2mfrdafl61
SHA256 fe50ea09cf0d5560c9c334f74f4e86cc6817635e643a5e8ff472ecc70a209834
MD5 1879a479fb37e456badf037cbd1d0efa
SHA1 56ab44df3df13fd7595762ea9b0ef79842aa5ca9
SHA512 72f44e308315aea0f1f7303e12ec1022df02e37af8850616688a95ea8db13fd4e35582436261891047886f7525f1c96c1d549a08591e6c38c1c16e5616de7499
SSDEEP 1536:B3aacz2htqkUla/NGVcJ/gAqcX0JMseuiGSeNVvDi0tMuUJJny3GM+9qKv:Ua/qc9rqzMseNoVv9EJFnM8qKv
TLSH
T1ACF3270267F6C198F0B31E34DA3646F08BA6BC59FA70921B13847E4EBD31A15ED21776
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 1 IoCs

resource	yara_rule
behavioral2/memory/3056-10-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 1 IoCs

resource	yara_rule
behavioral2/memory/3056-10-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/5180-0-0x0000000000400000-0x0000000000423000-memory.dmp	UPX
behavioral2/memory/5180-2-0x0000000000400000-0x0000000000423000-memory.dmp	UPX
behavioral2/files/0x000d000000016cd6-3.dat	UPX
behavioral2/memory/3316-6-0x0000000000400000-0x0000000000423000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
7	3056	rundll32.exe
10	3056	rundll32.exe
11	3056	rundll32.exe
12	3056	rundll32.exe
13	3056	rundll32.exe
15	3056	rundll32.exe
17	3056	rundll32.exe
18	3056	rundll32.exe

Deletes itself 1 IoCs

pid	Process
3316	rjbqyhe.exe

Executes dropped EXE 1 IoCs

pid	Process
3316	rjbqyhe.exe

Loads dropped DLL 1 IoCs

pid	Process
3056	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-1-5-21-3989226554-2204910950-1522900112-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\ccbzl\\qeajg.dll\",init"	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)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	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
behavioral2/memory/5180-0-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral2/memory/5180-2-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral2/files/0x000d000000016cd6-3.dat	upx
behavioral2/memory/3316-6-0x0000000000400000-0x0000000000423000-memory.dmp	upx

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
3676	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	rjbqyhe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-31_1879a479fb37e456badf037cbd1d0efa_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
3076	PING.EXE
3676	cmd.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
3076	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3056	rundll32.exe
3056	rundll32.exe
3056	rundll32.exe
3056	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3056	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5180	2026-08-31_1879a479fb37e456badf037cbd1d0efa_coinminer_elex_wannacry.exe
3316	rjbqyhe.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5180 wrote to memory of 3676	5180	2026-08-31_1879a479fb37e456badf037cbd1d0efa_coinminer_elex_wannacry.exe	89
PID 3676 wrote to memory of 3076	3676	cmd.exe	91
PID 3676 wrote to memory of 3316	3676	cmd.exe	92
PID 3316 wrote to memory of 3056	3316	rjbqyhe.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-31_1879a479fb37e456badf037cbd1d0efa_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-31_1879a479fb37e456badf037cbd1d0efa_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5180
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\rjbqyhe.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-31_1879a479fb37e456badf037cbd1d0efa_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:3676
- - 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:3076
- - \??\c:\rjbqyhe.exe
    c:\rjbqyhe.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-31_1879a479fb37e456badf037cbd1d0efa_coinminer_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3316
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\ccbzl\qeajg.dll",init c:\rjbqyhe.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:3056

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

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

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Downloads

qeajg.dll

Path \??\c:\ccbzl\qeajg.dll
Size 50KB
SHA256 a632527bcd457c9a4cfce83e7a9a675baff790b0279de5d8ea3192dfb2dd888a
MD5 ab32c5bfd7ecfbe9ed733dfb81210933
SHA1 4d5c6e7a0031691f12e78b096ff928b0d55bdfab
SHA512 59b971146292074d76d23d5f26889108f4d6e33804332449f4c589bf8a8d53e37ac8dfea47e9d3c5ae0f382ae1acf25c4968bea87b3f5ff9d51f2274229c1ab5
SSDEEP 1536:mrrG57ZqLLpf+Xz+HOtygmRnO/x5Rq8Gm:mwKGqutWM/x281
TLSH
T12033F1F4EFB4E067ECBA5F743E6A6215DA727B10C63188EA518090135F335CACA18717
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

rjbqyhe.exe

Path \??\c:\rjbqyhe.exe
Size 154KB
SHA256 bf24ab758aa4c2e99d6c609a06ded2c84d56cc173f971f69fa925adedf478593
MD5 25bc9aae826a4c651517005f6a1327d5
SHA1 888e5eb76e1cbf0a5f9e36b11dcf9d1e0e2aaabb
SHA512 5595b790d2f186e8626dbdd4e045ac44e59dd5020e725e54d667bc7c30adb04b7cd548ecb47aa61dc9930fbf92e301b10b52e61c6a3e744645618db1d1b256c6
SSDEEP 1536:B3aacz2htqkUla/NGVcJ/gAqcX0JMseuiGSeNVvDi0tMuUJJny3GM+9qKv3:Ua/qc9rqzMseNoVv9EJFnM8qKv3
TLSH
T1FAF3270267F6C198F0B31E34DA3646F08BA6BC59FA70921B13847E4EBD31A15ED21776
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3056-9-0x0000000010000000-0x0000000010032000-memory.dmp

Download

memory/3056-10-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/3316-6-0x0000000000400000-0x0000000000423000-memory.dmp

Download

memory/5180-0-0x0000000000400000-0x0000000000423000-memory.dmp

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memory/5180-2-0x0000000000400000-0x0000000000423000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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