floxif | 431b7b1a9f76fde5289baa0819bbda0f039520449fc3117314a5d804dd91b5cc

General

Target

431b7b1a9f76fde5289baa0819bbda0f039520449fc3117314a5d804dd91b5cc.exe
Size

2.7MB
MD5

fefdfb773e50a177c1e49c36c1e01187
SHA1

48a13eaa40ce37174f6640159f04ff147370d327
SHA256

431b7b1a9f76fde5289baa0819bbda0f039520449fc3117314a5d804dd91b5cc
SHA512

9a4464123526e5735254cce3c568082564dcfd57dce8c375e174fac80f157d6ba977f18e4b6ec875b3253bb4a1946cda9729a27fb9a50d9c976752c37dc3cfdc
SSDEEP

49152:zPE6vXGUOYQMqclLy0wsXuhXabboP4ACQDAknmCwlzI8nd6yw+AZ/WY4N2WwW/K1:LFvX6MFLySXuhXa/oP4ACYAknmCMINyO

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/0x000c000000023bb3-1.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/0x000c000000023bb3-1.dat	acprotect

Loads dropped DLL 5 IoCs

pid	Process
2260	431b7b1a9f76fde5289baa0819bbda0f039520449fc3117314a5d804dd91b5cc.exe
316	WerFault.exe
4828	WerFault.exe
1808	WerFault.exe
3496	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:	431b7b1a9f76fde5289baa0819bbda0f039520449fc3117314a5d804dd91b5cc.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2260-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/files/0x000c000000023bb3-1.dat	upx
behavioral2/memory/2260-17-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	431b7b1a9f76fde5289baa0819bbda0f039520449fc3117314a5d804dd91b5cc.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4828	2260	WerFault.exe	83
3496	2260	WerFault.exe	83

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	431b7b1a9f76fde5289baa0819bbda0f039520449fc3117314a5d804dd91b5cc.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2260	431b7b1a9f76fde5289baa0819bbda0f039520449fc3117314a5d804dd91b5cc.exe
2260	431b7b1a9f76fde5289baa0819bbda0f039520449fc3117314a5d804dd91b5cc.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2260	431b7b1a9f76fde5289baa0819bbda0f039520449fc3117314a5d804dd91b5cc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2260	431b7b1a9f76fde5289baa0819bbda0f039520449fc3117314a5d804dd91b5cc.exe

C:\Users\Admin\AppData\Local\Temp\431b7b1a9f76fde5289baa0819bbda0f039520449fc3117314a5d804dd91b5cc.exe
"C:\Users\Admin\AppData\Local\Temp\431b7b1a9f76fde5289baa0819bbda0f039520449fc3117314a5d804dd91b5cc.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:2260
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2260 -s 800
  2⤵
  - Loads dropped DLL
  - Program crash
  PID:4828
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2260 -s 824
  2⤵
  - Loads dropped DLL
  - Program crash
  PID:3496

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2260 -ip 2260
1⤵
- Loads dropped DLL
PID:316

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 2260 -ip 2260
1⤵
- Loads dropped DLL
PID:1808

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/2260-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2260-6-0x0000000000E41000-0x0000000000E42000-memory.dmp

Filesize
4KB

Download
memory/2260-17-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2260-15-0x0000000000E40000-0x00000000010E8000-memory.dmp

Filesize
2.7MB

Download

Analysis

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