floxif | 5a3f4ba13d3809f2e5201e8346317388ee058a3e09b144765e360a2528170c2e

Analysis

max time kernel
15s
max time network
18s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
02/01/2025, 11:53

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General

Target

5a3f4ba13d3809f2e5201e8346317388ee058a3e09b144765e360a2528170c2eN.exe
Size

382KB
MD5

a3880921624612348de749f99812e8b0
SHA1

af8ce0ff8b693aaf2778ec7c91f09107004c9012
SHA256

5a3f4ba13d3809f2e5201e8346317388ee058a3e09b144765e360a2528170c2e
SHA512

9133e90b098b36b84904d9d26237162fe57ba947c6c942582380c5315d4cbf73b9a2a7b6da6b3220a63d0021b54a302dcbb45c50e70d387833a44469365c13d6
SSDEEP

6144:ZWXsbCcuRwIGTIekX0DdPohJI+80CHuoDSEiTGvZ8SHqQ5VWAPBV+UdvrEFp7hK7:4X13RwIGTIsohTOuoDSEEGvZ8SDPBjv9

Score

10^/10

floxif backdoor discovery 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
behavioral1/files/0x00080000000120fd-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x00080000000120fd-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
2544	5a3f4ba13d3809f2e5201e8346317388ee058a3e09b144765e360a2528170c2eN.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x00080000000120fd-1.dat	upx
behavioral1/memory/2544-3-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2544-6-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	5a3f4ba13d3809f2e5201e8346317388ee058a3e09b144765e360a2528170c2eN.exe

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	5a3f4ba13d3809f2e5201e8346317388ee058a3e09b144765e360a2528170c2eN.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2544	5a3f4ba13d3809f2e5201e8346317388ee058a3e09b144765e360a2528170c2eN.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2544	5a3f4ba13d3809f2e5201e8346317388ee058a3e09b144765e360a2528170c2eN.exe

C:\Users\Admin\AppData\Local\Temp\5a3f4ba13d3809f2e5201e8346317388ee058a3e09b144765e360a2528170c2eN.exe
"C:\Users\Admin\AppData\Local\Temp\5a3f4ba13d3809f2e5201e8346317388ee058a3e09b144765e360a2528170c2eN.exe"
1⤵
- Loads dropped DLL
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:2544

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/2544-3-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2544-5-0x0000000000411000-0x0000000000414000-memory.dmp

Filesize
12KB

Download
memory/2544-6-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download