farfli | b1f088cc0eb8665e2d1d92cafe06c8818fed3df8128d52e2b7c0e4394657bf0a

General

Target
b1f088cc0eb8665e2d1d92cafe06c8818fed3df8128d52e2b7c0e4394657bf0a.exe
Size 105KB
Sample260808-mk3e2aveme
SHA256 b1f088cc0eb8665e2d1d92cafe06c8818fed3df8128d52e2b7c0e4394657bf0a
MD5 57890399f5a0981dcae37b3c7dc39dcb
SHA1 5333ea97dcd170f76ba7578b5b2f334207d87a75
SHA512 e0f03b972f31eca5bbf8f4540e5c82f67006e09987910e94f723d7577d3b9ce330d37c1f667cec1f653dcd0f7054a4ac6145f4b2b08f14967188187e4436fa37
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX47dq:piAXaKDeKNnD36cb8tI7o
TLSH
T122B3AE42ABF087A1E06259B506735B629EB3FC6B1934822777D7B70EAC30F40EE25355
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli persistence spyware stealer

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/2796-10-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
3	2796	rundll32.exe
4	2796	rundll32.exe
5	2796	rundll32.exe
9	2796	rundll32.exe
10	2796	rundll32.exe
15	2796	rundll32.exe
16	2796	rundll32.exe
18	2796	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4512	xzukqd.exe

Executes dropped EXE 1 IoCs

pid	Process
4512	xzukqd.exe

Loads dropped DLL 1 IoCs

pid	Process
2796	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-1-5-21-1738198120-2966725515-3980530802-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\oitic\\nwgellg.dll\",GetWindowClass"	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)	\??\k:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	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

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
4872	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	xzukqd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b1f088cc0eb8665e2d1d92cafe06c8818fed3df8128d52e2b7c0e4394657bf0a.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
4872	cmd.exe
4224	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
4224	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2796	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3956	b1f088cc0eb8665e2d1d92cafe06c8818fed3df8128d52e2b7c0e4394657bf0a.exe
4512	xzukqd.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3956 wrote to memory of 4872	3956	b1f088cc0eb8665e2d1d92cafe06c8818fed3df8128d52e2b7c0e4394657bf0a.exe	89
PID 4872 wrote to memory of 4224	4872	cmd.exe	91
PID 4872 wrote to memory of 4512	4872	cmd.exe	92
PID 4512 wrote to memory of 2796	4512	xzukqd.exe	93

C:\Users\Admin\AppData\Local\Temp\b1f088cc0eb8665e2d1d92cafe06c8818fed3df8128d52e2b7c0e4394657bf0a.exe
"C:\Users\Admin\AppData\Local\Temp\b1f088cc0eb8665e2d1d92cafe06c8818fed3df8128d52e2b7c0e4394657bf0a.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3956
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\xzukqd.exe "C:\Users\Admin\AppData\Local\Temp\b1f088cc0eb8665e2d1d92cafe06c8818fed3df8128d52e2b7c0e4394657bf0a.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:4872
- - 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:4224
- - \??\c:\xzukqd.exe
    c:\xzukqd.exe "C:\Users\Admin\AppData\Local\Temp\b1f088cc0eb8665e2d1d92cafe06c8818fed3df8128d52e2b7c0e4394657bf0a.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4512
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\oitic\nwgellg.dll",GetWindowClass c:\xzukqd.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:2796

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

Replay Monitor

Loading Replay Monitor...

Downloads

nwgellg.dll

Path \??\c:\oitic\nwgellg.dll
Size 46KB
SHA256 f57f9e54f4774c2b944fb070ae0c2a02cbb4b7686ab3207544c3ccaff0ff3dd9
MD5 a3fd41430ddcaa55fde840788925406a
SHA1 dbdd87f5c1bbf6a6f44c2e2c4744675d5e4e75c2
SHA512 23109572cfc9a282ea3ec84d93bfe02303d27f365ad2d9f47f6234f91da14c64f80133cc5e49746dfcb65d2454b7e7c13eff59ba4bbc18e09d2fb1c630ba59c9
SSDEEP 768:2sUfnvxs6iLlhpfFPtnQf7kifD/v7yb9Bh7Cb0VQJojZC/xjTk:2sJT1qf4W/vub9nnV1jZC/xE
TLSH
T19D2302C8A6F08EF3D2F90B7980E046DCDCFDB939877381150566008E7C71057FA446AA
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

xzukqd.exe

Path \??\c:\xzukqd.exe
Size 106KB
SHA256 ccaef180195138014d4474cea161b04f9ec77182e9db0f289ba51aaec78e42e4
MD5 941975cbc196974323701f4226f8beec
SHA1 3f51063e2ad1f12e29cb29630d55977d2ac61394
SHA512 47962faf9a0cbb990158bd947315f06a0ff4940943b329bccfd3b2492b76f4320f9dba1c8587282fee324ba8740dcf7a5ff73a1010d4402577ce6deb163fd479
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX47dqU:piAXaKDeKNnD36cb8tI7oU
TLSH
T101B3AE42ABF08761E06259B506735B629EB3FC6B1934822777D6B70EAC30F40EE25355
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2796-9-0x0000000010000000-0x000000001002E000-memory.dmp

Download

memory/2796-10-0x0000000010000000-0x000000001002E000-memory.dmp

Download

memory/3956-0-0x0000000000400000-0x000000000041A000-memory.dmp

Download

memory/3956-2-0x0000000000400000-0x000000000041A000-memory.dmp

Download

memory/4512-6-0x0000000000400000-0x000000000041A000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads