farfli | 8db518406ca3f352ce7056cfa93a28b66b3db85f3d009ad58a3df213d25701a7

General

Target
8db518406ca3f352ce7056cfa93a28b66b3db85f3d009ad58a3df213d25701a7.exe
Size 111KB
Sample260820-k9ghratcla
SHA256 8db518406ca3f352ce7056cfa93a28b66b3db85f3d009ad58a3df213d25701a7
MD5 d0926d481a2ac9432205194a35c83905
SHA1 fc5fdb7319614beaf8ea1ec96b4bbe1ae340f9a8
SHA512 06a7065ed9948233ca674339de5fccb951963f78ce60bcdc8f822f5c43b43b0ac32d1ab7afc3b88b9d51424186218a6203f3cae4f3d4eeac424a2b9dee4227e9
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX4iL:piAXaKDeKNnD36cb8tIiL
TLSH
T10CB39E42ABF0C6A5E0625CB506775B619EB2FC6A2924832777D6B70FEC30F04EE25354
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/1160-10-0x0000000010000000-0x000000001002E000-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
1	1160	rundll32.exe
2	1160	rundll32.exe
3	1160	rundll32.exe
4	1160	rundll32.exe
5	1160	rundll32.exe
6	1160	rundll32.exe
7	1160	rundll32.exe
8	1160	rundll32.exe

Deletes itself 1 IoCs

pid	Process
3300	tlpzbhr.exe

Executes dropped EXE 1 IoCs

pid	Process
3300	tlpzbhr.exe

Loads dropped DLL 1 IoCs

pid	Process
1160	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-1-5-21-3611646547-550105268-947503007-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\atksk\\wacem.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)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\r:	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
436	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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tlpzbhr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8db518406ca3f352ce7056cfa93a28b66b3db85f3d009ad58a3df213d25701a7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
436	cmd.exe
5568	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
5568	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1160	rundll32.exe
1160	rundll32.exe
1160	rundll32.exe
1160	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1160	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3916	8db518406ca3f352ce7056cfa93a28b66b3db85f3d009ad58a3df213d25701a7.exe
3300	tlpzbhr.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3916 wrote to memory of 436	3916	8db518406ca3f352ce7056cfa93a28b66b3db85f3d009ad58a3df213d25701a7.exe	89
PID 436 wrote to memory of 5568	436	cmd.exe	91
PID 436 wrote to memory of 3300	436	cmd.exe	92
PID 3300 wrote to memory of 1160	3300	tlpzbhr.exe	93

C:\Users\Admin\AppData\Local\Temp\8db518406ca3f352ce7056cfa93a28b66b3db85f3d009ad58a3df213d25701a7.exe
"C:\Users\Admin\AppData\Local\Temp\8db518406ca3f352ce7056cfa93a28b66b3db85f3d009ad58a3df213d25701a7.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3916
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\tlpzbhr.exe "C:\Users\Admin\AppData\Local\Temp\8db518406ca3f352ce7056cfa93a28b66b3db85f3d009ad58a3df213d25701a7.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:436
- - 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:5568
- - \??\c:\tlpzbhr.exe
    c:\tlpzbhr.exe "C:\Users\Admin\AppData\Local\Temp\8db518406ca3f352ce7056cfa93a28b66b3db85f3d009ad58a3df213d25701a7.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3300
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\atksk\wacem.dll",GetWindowClass c:\tlpzbhr.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:1160

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

wacem.dll

Path \??\c:\atksk\wacem.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

tlpzbhr.exe

Path \??\c:\tlpzbhr.exe
Size 111KB
SHA256 806b7591ac8407c6a483a3b8b985cca20ee67ad9cd46545574e86510c714c74d
MD5 bfddd71af7c9545ae5b4edd7f3d49289
SHA1 937ace4cf708efc4496fadd9c583123c4bb1ae60
SHA512 dfb3337e89cbd846cbea8b9855cad114880c87fb2803580e021c2cf2b6f16642449373da1cd2289e180f6806851b6259f55d1d3b53d30c9a80cb9b8325d14cb4
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX4im:piAXaKDeKNnD36cb8tIim
TLSH
T115B39E42ABF0C6A5E0665CB506775B619EB2FC6A2924832777D6B70FEC30F00EE25354
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1160-9-0x0000000010000000-0x000000001002E000-memory.dmp

Download

memory/1160-10-0x0000000010000000-0x000000001002E000-memory.dmp

Download

memory/3300-6-0x0000000000400000-0x000000000041A000-memory.dmp

Download

memory/3916-0-0x0000000000400000-0x000000000041A000-memory.dmp

Download

memory/3916-2-0x0000000000400000-0x000000000041A000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads