farfli | 5232410ebf8f37ef8b5859b10f6042f36e7f11d1b06f0835c960a777a6169cb9

General

Target
2026-08-03_3fb42045ac941444e5f3d67229e86da2_coinminer_elex_wannacry.exe
Size 311KB
Sample260803-la5xqsfc82
SHA256 5232410ebf8f37ef8b5859b10f6042f36e7f11d1b06f0835c960a777a6169cb9
MD5 3fb42045ac941444e5f3d67229e86da2
SHA1 841fee94e97175e64b6f76cf3bac9c5c62c982ca
SHA512 609e77fa013983154e7cb0e95ee3ae29f6db26a38eed96894ecc013fe96f533178b7f5938b199242ca0bcdaf8103027337392a8f932c5d91d8109c680068203e
SSDEEP 6144:VRoSgW/zYds0SfxsTxt3YeWH8k+p+Nj8DmILo:ASf/zc8GrYdcb88DBE
TLSH
T1F264BE2332D008ABC1E67A73CEB67734E3F9F9A489319A6F57D8094D5E36E448711326
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli gh0strat persistence rat spyware stealer upx

Malware Config

Extracted

Family

gh0strat

C2

host123.zz.am:6658
http://107.163.43.235:12388/
http://107.163.43.236:10289/support.php

Attributes

user_agent
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C))

Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0)

Signatures

Family: Farfli
Farfli is a Windows backdoor written in C++.
backdoor farfli
Family: Gh0strat
Gh0st RAT is a remote access tool (RAT) with its source code public and it has been used by multiple Chinese groups.
rat gh0strat

Detects Farfli Backdoor 3 IoCs

resource	yara_rule
behavioral2/memory/4696-8-0x0000000010000000-0x000000001004B000-memory.dmp	family_farfli
behavioral2/memory/4696-10-0x0000000010000000-0x000000001004B000-memory.dmp	family_farfli
behavioral2/memory/4696-15-0x0000000010000000-0x000000001004B000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/4696-8-0x0000000010000000-0x000000001004B000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4696-10-0x0000000010000000-0x000000001004B000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4696-15-0x0000000010000000-0x000000001004B000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral2/files/0x0007000000016cbc-1.dat	UPX
behavioral2/files/0x00190000000187a6-6.dat	UPX
behavioral2/memory/4696-7-0x0000000010000000-0x000000001004B000-memory.dmp	UPX
behavioral2/memory/4696-8-0x0000000010000000-0x000000001004B000-memory.dmp	UPX
behavioral2/memory/4696-10-0x0000000010000000-0x000000001004B000-memory.dmp	UPX
behavioral2/memory/4696-15-0x0000000010000000-0x000000001004B000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
5784	mbsdfdn.exe

Executes dropped EXE 2 IoCs

pid	Process
5784	mbsdfdn.exe
4696	teqeszc.exe

Loads dropped DLL 1 IoCs

pid	Process
4696	teqeszc.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-1-5-21-1079202589-886135813-2527035092-1000\Software\Microsoft\Windows\CurrentVersion\Run\flate = "c:\\Program Files\\rfvebzknx\\teqeszc.exe \"c:\\Program Files\\rfvebzknx\\teqeszc.dll\",inflate"	teqeszc.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)	\??\t:	teqeszc.exe
File opened (read-only)	\??\z:	teqeszc.exe
File opened (read-only)	\??\d:	teqeszc.exe
File opened (read-only)	\??\g:	teqeszc.exe
File opened (read-only)	\??\h:	teqeszc.exe
File opened (read-only)	\??\j:	teqeszc.exe
File opened (read-only)	\??\m:	teqeszc.exe
File opened (read-only)	\??\s:	teqeszc.exe
File opened (read-only)	\??\y:	teqeszc.exe
File opened (read-only)	\??\i:	teqeszc.exe
File opened (read-only)	\??\l:	teqeszc.exe
File opened (read-only)	\??\o:	teqeszc.exe
File opened (read-only)	\??\r:	teqeszc.exe
File opened (read-only)	\??\u:	teqeszc.exe
File opened (read-only)	\??\v:	teqeszc.exe
File opened (read-only)	\??\w:	teqeszc.exe
File opened (read-only)	\??\a:	teqeszc.exe
File opened (read-only)	\??\b:	teqeszc.exe
File opened (read-only)	\??\k:	teqeszc.exe
File opened (read-only)	\??\p:	teqeszc.exe
File opened (read-only)	\??\x:	teqeszc.exe
File opened (read-only)	\??\n:	teqeszc.exe
File opened (read-only)	\??\q:	teqeszc.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	teqeszc.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0007000000016cbc-1.dat	upx
behavioral2/files/0x00190000000187a6-6.dat	upx
behavioral2/memory/4696-7-0x0000000010000000-0x000000001004B000-memory.dmp	upx
behavioral2/memory/4696-8-0x0000000010000000-0x000000001004B000-memory.dmp	upx
behavioral2/memory/4696-10-0x0000000010000000-0x000000001004B000-memory.dmp	upx
behavioral2/memory/4696-15-0x0000000010000000-0x000000001004B000-memory.dmp	upx

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	\??\c:\Program Files\rfvebzknx\teqeszc.exe	mbsdfdn.exe
File opened for modification	\??\c:\Program Files\rfvebzknx	mbsdfdn.exe
File created	\??\c:\Program Files\rfvebzknx\teqeszc.dll	mbsdfdn.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
4132	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_3fb42045ac941444e5f3d67229e86da2_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	mbsdfdn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	teqeszc.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
4132	cmd.exe
6112	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	teqeszc.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	teqeszc.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
6112	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4696	teqeszc.exe
4696	teqeszc.exe
4696	teqeszc.exe
4696	teqeszc.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4696	teqeszc.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4572	2026-08-03_3fb42045ac941444e5f3d67229e86da2_coinminer_elex_wannacry.exe
5784	mbsdfdn.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4572 wrote to memory of 4132	4572	2026-08-03_3fb42045ac941444e5f3d67229e86da2_coinminer_elex_wannacry.exe	89
PID 4132 wrote to memory of 6112	4132	cmd.exe	91
PID 4132 wrote to memory of 5784	4132	cmd.exe	92
PID 5784 wrote to memory of 4696	5784	mbsdfdn.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-03_3fb42045ac941444e5f3d67229e86da2_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-03_3fb42045ac941444e5f3d67229e86da2_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4572
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\mbsdfdn.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-03_3fb42045ac941444e5f3d67229e86da2_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:4132
- - 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:6112
- - C:\Users\Admin\AppData\Local\Temp\mbsdfdn.exe
    C:\Users\Admin\AppData\Local\Temp\\mbsdfdn.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-03_3fb42045ac941444e5f3d67229e86da2_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:5784
  - - \??\c:\Program Files\rfvebzknx\teqeszc.exe
      "c:\Program Files\rfvebzknx\teqeszc.exe" "c:\Program Files\rfvebzknx\teqeszc.dll",inflate C:\Users\Admin\AppData\Local\Temp\mbsdfdn.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:4696

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:5084

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

teqeszc.dll

Path C:\Program Files\rfvebzknx\teqeszc.dll
Size 134KB
SHA256 3badfc0124b390377d87be5afe6df7c80c8380a84d88ef2c8a8646773232374f
MD5 1879fb6643b10a5ef217d856464efd98
SHA1 27677d09ee4f3d64f8dc1dad8af5e8c68a5ab6d0
SHA512 36e528579eeb3b929e3fe300ff3398617313fedace5cb695f5b6d43788045090f17e0fa53cc01e29939ba781d81e468ed60f783f18c10098a6a5c40d1ec215e8
SSDEEP 3072:Mz9IOfAdv1qacKNQTtP0KuYjbi7Gp0N9DLT:MzOOfAdv1XaPduYjbEfT
TLSH
T127D312559C0990AAC480753EF44EF7A12A3A861480BE134F74DFE3E3D8F56967B2CC5A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

teqeszc.exe

Path C:\Program Files\rfvebzknx\teqeszc.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

mbsdfdn.exe

Path C:\Users\Admin\AppData\Local\Temp\mbsdfdn.exe
Size 311KB
SHA256 d40f69b215f7842b48c1c92f11587d761c1c8a3cd4917b8fb3f89030ce9914f7
MD5 f9a4c51802caf6d9bc0974d51f36f38f
SHA1 613698e8274bb5b28dc2505c182ffb6e22dad02b
SHA512 18226acf7d75bd3bf8d6ad1b33abf0b2986469c5fd1e60b6c6204057d437b4a0bab0b4320d0e1810138fe62637112368f8a89e097a75ef104f0c8e65723db751
SSDEEP 6144:VRoSgW/zYds0SfxsTxt3YeWH8k+p+Nj8DmILo:ASf/zc8GrYdcb88DBE
TLSH
T17264BE2332D008ABC1E67A73CEB67734E3F9F9A489319A6F57D8094D5E36E448711326
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4696-7-0x0000000010000000-0x000000001004B000-memory.dmp

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memory/4696-8-0x0000000010000000-0x000000001004B000-memory.dmp

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memory/4696-10-0x0000000010000000-0x000000001004B000-memory.dmp

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memory/4696-15-0x0000000010000000-0x000000001004B000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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