farfli | e8b0a8d040ff1df21c90fde742d1793698cba6d096cb2d5f0ef8b32d1772bfb2

General

Target
2026-09-20_e59ea024ff93d7d7d5dc46cf0466279e_coinminer_elex_wannacry.exe
Size 244KB
Sample260920-3a76jafp3w
SHA256 e8b0a8d040ff1df21c90fde742d1793698cba6d096cb2d5f0ef8b32d1772bfb2
MD5 e59ea024ff93d7d7d5dc46cf0466279e
SHA1 9644cc4089a747567f55446dd1645350db526ee2
SHA512 7c15977d9f997c719c3faefcea4bc04185c761c9a5b34ff98b5c7cfe1b18149802ef75038cf7eddf2c0b1759487cebfeac9a133040def317708de6315dbfa73b
SSDEEP 3072:etaoOzbY5l/Tx1DNgcbouGYefD5h1zZCBgb3EInA3rdCKA9bwpfMrgsAHuskkyck:etatPE5Txnev1zQBgexOdw6rpI9FsbLJ
TLSH
T146348C1233E80869E5EA7E33CEB6A630D7FAE9759C33D66F1394420D4E36904CB15366
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/3232-8-0x0000000010000000-0x0000000010038000-memory.dmp	family_farfli
behavioral2/memory/3232-10-0x0000000010000000-0x0000000010038000-memory.dmp	family_farfli
behavioral2/memory/3232-13-0x0000000010000000-0x0000000010038000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/3232-8-0x0000000010000000-0x0000000010038000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3232-10-0x0000000010000000-0x0000000010038000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3232-13-0x0000000010000000-0x0000000010038000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral2/files/0x000700000001b859-1.dat	UPX
behavioral2/memory/3232-7-0x0000000010000000-0x0000000010038000-memory.dmp	UPX
behavioral2/files/0x000d00000001c5d1-6.dat	UPX
behavioral2/memory/3232-8-0x0000000010000000-0x0000000010038000-memory.dmp	UPX
behavioral2/memory/3232-10-0x0000000010000000-0x0000000010038000-memory.dmp	UPX
behavioral2/memory/3232-13-0x0000000010000000-0x0000000010038000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
4448	bacfkh.exe

Executes dropped EXE 2 IoCs

pid	Process
4448	bacfkh.exe
3232	ezahb.exe

Loads dropped DLL 1 IoCs

pid	Process
3232	ezahb.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-1-5-21-1704430598-3087477806-3297458608-1000\Software\Microsoft\Windows\CurrentVersion\Run\Vicity = "c:\\Program Files\\eujdt\\ezahb.exe \"c:\\Program Files\\eujdt\\ezahb.dll\",Group"	ezahb.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)	\??\a:	ezahb.exe
File opened (read-only)	\??\b:	ezahb.exe
File opened (read-only)	\??\d:	ezahb.exe
File opened (read-only)	\??\g:	ezahb.exe
File opened (read-only)	\??\k:	ezahb.exe
File opened (read-only)	\??\m:	ezahb.exe
File opened (read-only)	\??\r:	ezahb.exe
File opened (read-only)	\??\y:	ezahb.exe
File opened (read-only)	\??\p:	ezahb.exe
File opened (read-only)	\??\t:	ezahb.exe
File opened (read-only)	\??\u:	ezahb.exe
File opened (read-only)	\??\v:	ezahb.exe
File opened (read-only)	\??\z:	ezahb.exe
File opened (read-only)	\??\h:	ezahb.exe
File opened (read-only)	\??\n:	ezahb.exe
File opened (read-only)	\??\s:	ezahb.exe
File opened (read-only)	\??\w:	ezahb.exe
File opened (read-only)	\??\i:	ezahb.exe
File opened (read-only)	\??\j:	ezahb.exe
File opened (read-only)	\??\l:	ezahb.exe
File opened (read-only)	\??\o:	ezahb.exe
File opened (read-only)	\??\q:	ezahb.exe
File opened (read-only)	\??\x:	ezahb.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	ezahb.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3232-7-0x0000000010000000-0x0000000010038000-memory.dmp	upx
behavioral2/files/0x000d00000001c5d1-6.dat	upx
behavioral2/memory/3232-8-0x0000000010000000-0x0000000010038000-memory.dmp	upx
behavioral2/memory/3232-10-0x0000000010000000-0x0000000010038000-memory.dmp	upx
behavioral2/memory/3232-13-0x0000000010000000-0x0000000010038000-memory.dmp	upx

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\eujdt	bacfkh.exe
File created	\??\c:\Program Files\eujdt\ezahb.dll	bacfkh.exe
File created	\??\c:\Program Files\eujdt\ezahb.exe	bacfkh.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
2772	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	2026-09-20_e59ea024ff93d7d7d5dc46cf0466279e_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	bacfkh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ezahb.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
2772	cmd.exe
5616	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	ezahb.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	ezahb.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
5616	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3232	ezahb.exe
3232	ezahb.exe
3232	ezahb.exe
3232	ezahb.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3232	ezahb.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5684	2026-09-20_e59ea024ff93d7d7d5dc46cf0466279e_coinminer_elex_wannacry.exe
4448	bacfkh.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5684 wrote to memory of 2772	5684	2026-09-20_e59ea024ff93d7d7d5dc46cf0466279e_coinminer_elex_wannacry.exe	89
PID 2772 wrote to memory of 5616	2772	cmd.exe	91
PID 2772 wrote to memory of 4448	2772	cmd.exe	92
PID 4448 wrote to memory of 3232	4448	bacfkh.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-09-20_e59ea024ff93d7d7d5dc46cf0466279e_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-20_e59ea024ff93d7d7d5dc46cf0466279e_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5684
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\bacfkh.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-20_e59ea024ff93d7d7d5dc46cf0466279e_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:2772
- - 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:5616
- - C:\Users\Admin\AppData\Local\Temp\bacfkh.exe
    C:\Users\Admin\AppData\Local\Temp\\bacfkh.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-20_e59ea024ff93d7d7d5dc46cf0466279e_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:4448
  - - \??\c:\Program Files\eujdt\ezahb.exe
      "c:\Program Files\eujdt\ezahb.exe" "c:\Program Files\eujdt\ezahb.dll",Group C:\Users\Admin\AppData\Local\Temp\bacfkh.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:3232

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

ezahb.dll

Path C:\Program Files\eujdt\ezahb.dll
Size 97KB
SHA256 88dc79c2b81da577102c21bd68efd8281c3c97cb75dc5ba3250178f044ccb629
MD5 964e8327ce439fe9b4afa745ffb25695
SHA1 50aef02fcd274d30e967ca611234b704e5b7704f
SHA512 4c4dab33155bf80633058058d6e825a78d50a073501e94e9dbeececdbad4f806fdcc331ccc19586c2d5975af03edc8035fb4d465c93826d47d60a124497affa8
SSDEEP 3072:BDpG6gzgHr5tCmfk455ecDBkdq+SStvAbGO:5pG6Sg9txRk/SS6bGO
TLSH
T1DEA301FA290D7DD6CB354839D6528E35FA29EE348C589F887ECE6C13ACB8510E1641F1
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ezahb.exe

Path C:\Program Files\eujdt\ezahb.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

bacfkh.exe

Path C:\Users\Admin\AppData\Local\Temp\bacfkh.exe
Size 245KB
SHA256 061ec36dcb63f70dcb17b186f3362adb79e2416a89e8def2a66ca99caeb02c8c
MD5 5dd471266b23bd836c9cba2705b3659d
SHA1 c1f6305b4317c068588758f5118b9349894158b2
SHA512 37741498494bee80225f0bbdc8345da851a3c28dd55dc634c1b3a5d1fdaa95f36ec00c64d7916ce18eeecc79905643e155e33c85d26f1670cde80a12101dd9c9
SSDEEP 3072:etaoOzbY5l/Tx1DNgcbouGYefD5h1zZCBgb3EInA3rdCKA9bwpfMrgsAHuskkyc0:etatPE5Txnev1zQBgexOdw6rpI9FsbL
TLSH
T1A0348C1233E80869E5EA7E33CEB6A630D7FAE9759C33D66F1394420D4E36904CB15366
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3232-7-0x0000000010000000-0x0000000010038000-memory.dmp

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memory/3232-8-0x0000000010000000-0x0000000010038000-memory.dmp

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memory/3232-10-0x0000000010000000-0x0000000010038000-memory.dmp

Download

memory/3232-13-0x0000000010000000-0x0000000010038000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads