floxif | 6bd5a58ab8c852a5d24f337446d8e5136c9e928b5f04a7406aebcab25984abfd

General

Target

6bd5a58ab8c852a5d24f337446d8e5136c9e928b5f04a7406aebcab25984abfd.exe
Size

2.7MB
MD5

4a871b504281584161ca591a9aebf017
SHA1

0296f49f2a4b088a8579858b6c740a32f0fa5d11
SHA256

6bd5a58ab8c852a5d24f337446d8e5136c9e928b5f04a7406aebcab25984abfd
SHA512

1a793daef294b015189158171afad5160583ca9b124bb96b2b4cee252361a3c346260855b740acba56fc29b691bcd35b9eeb347a34784a4d8991b5c8452fab5c
SSDEEP

49152:zPE6vXDUOYQMqclLy0wsXuhXabboP4ACQDAknm/wlzI8ndyyw+AZ/WY4N2WwW/KN:LFvXfMFLySXuhXa/oP4ACYAknm/MIhyW

Score

10^/10

floxif backdoor discovery persistence privilege_escalation trojan upx

Malware Config

Signatures

Floxif family
floxif
Floxif, Floodfix
Floxif aka FloodFix is a file-changing trojan and backdoor written in C++.
backdoor trojan floxif

Detects Floxif payload 1 IoCs

backdoor

resource	yara_rule
behavioral2/files/0x000c000000023b9a-1.dat	floxif

Event Triggered Execution: AppInit DLLs 1 TTPs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
persistence privilege_escalation

AppInit DLLs
T1546.010

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000c000000023b9a-1.dat	acprotect

Loads dropped DLL 5 IoCs

pid	Process
2920	6bd5a58ab8c852a5d24f337446d8e5136c9e928b5f04a7406aebcab25984abfd.exe
3456	WerFault.exe
780	WerFault.exe
3492	WerFault.exe
4176	WerFault.exe

Enumerates connected drives 3 TTPs 1 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)	\??\e:	6bd5a58ab8c852a5d24f337446d8e5136c9e928b5f04a7406aebcab25984abfd.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2920-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/files/0x000c000000023b9a-1.dat	upx
behavioral2/memory/2920-17-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	6bd5a58ab8c852a5d24f337446d8e5136c9e928b5f04a7406aebcab25984abfd.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
780	2920	WerFault.exe	82
4176	2920	WerFault.exe	82

System Location Discovery: System Language Discovery 1 TTPs 1 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	6bd5a58ab8c852a5d24f337446d8e5136c9e928b5f04a7406aebcab25984abfd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2920	6bd5a58ab8c852a5d24f337446d8e5136c9e928b5f04a7406aebcab25984abfd.exe
2920	6bd5a58ab8c852a5d24f337446d8e5136c9e928b5f04a7406aebcab25984abfd.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2920	6bd5a58ab8c852a5d24f337446d8e5136c9e928b5f04a7406aebcab25984abfd.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2920	6bd5a58ab8c852a5d24f337446d8e5136c9e928b5f04a7406aebcab25984abfd.exe

C:\Users\Admin\AppData\Local\Temp\6bd5a58ab8c852a5d24f337446d8e5136c9e928b5f04a7406aebcab25984abfd.exe
"C:\Users\Admin\AppData\Local\Temp\6bd5a58ab8c852a5d24f337446d8e5136c9e928b5f04a7406aebcab25984abfd.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:2920
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2920 -s 800
  2⤵
  - Loads dropped DLL
  - Program crash
  PID:780
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2920 -s 868
  2⤵
  - Loads dropped DLL
  - Program crash
  PID:4176

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2920 -ip 2920
1⤵
- Loads dropped DLL
PID:3456

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 2920 -ip 2920
1⤵
- Loads dropped DLL
PID:3492

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

Privilege Escalation

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files\Common Files\System\symsrv.dll

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/2920-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2920-6-0x0000000000A11000-0x0000000000A12000-memory.dmp

Filesize
4KB

Download
memory/2920-17-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2920-15-0x0000000000A10000-0x0000000000CB8000-memory.dmp

Filesize
2.7MB

Download

Analysis

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