floxif | 2f0263891c78ea17749938205abd6ba3c3cbc915e435a1e8f19fb7e2569be728

Analysis

max time kernel
118s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
30-10-2024 21:27

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General

Target

2f0263891c78ea17749938205abd6ba3c3cbc915e435a1e8f19fb7e2569be728.dll
Size

213KB
MD5

4999ee80421da39d5bf6ac7ffcba0d2d
SHA1

cc262b3dd20f844fc611a72b3c35f571600df227
SHA256

2f0263891c78ea17749938205abd6ba3c3cbc915e435a1e8f19fb7e2569be728
SHA512

5742bab952c2942ac2d271671d63c6d665e7aa02ceefc4f81c2d62507b47c982880345510162a50c8bd336f89c141baa8941b937a033722607803bb2c777cdf1
SSDEEP

6144:/z9qhjjOKJ8S0b91tr7BV+UdvrEFp7hKjcm:/xqhjjd5g93BjvrEH7Qcm

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

Processes:

resource	yara_rule
\Program Files\Common Files\System\symsrv.dll	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

Processes:

resource	yara_rule
\Program Files\Common Files\System\symsrv.dll	acprotect

Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

276 rundll32.exe

pid	process
276	rundll32.exe

UPX packed file 3 IoCs

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

upx

Processes:

resource	yara_rule
\Program Files\Common Files\System\symsrv.dll	upx
behavioral1/memory/276-3-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/276-6-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

Processes:

rundll32.exe

description ioc process

File created C:\Program Files\Common Files\System\symsrv.dll rundll32.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

Processes:

rundll32.exe

description ioc process

Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rundll32.exe

description	ioc	process
File created	C:\Program Files\Common Files\System\symsrv.dll	rundll32.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 2484 wrote to memory of 276	2484	rundll32.exe	rundll32.exe
PID 2484 wrote to memory of 276	2484	rundll32.exe	rundll32.exe
PID 2484 wrote to memory of 276	2484	rundll32.exe	rundll32.exe
PID 2484 wrote to memory of 276	2484	rundll32.exe	rundll32.exe
PID 2484 wrote to memory of 276	2484	rundll32.exe	rundll32.exe
PID 2484 wrote to memory of 276	2484	rundll32.exe	rundll32.exe
PID 2484 wrote to memory of 276	2484	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2f0263891c78ea17749938205abd6ba3c3cbc915e435a1e8f19fb7e2569be728.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2484

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2f0263891c78ea17749938205abd6ba3c3cbc915e435a1e8f19fb7e2569be728.dll,#1
2⤵
- Loads dropped DLL
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:276

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

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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/276-3-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/276-4-0x00000000750F1000-0x00000000750F2000-memory.dmp

Filesize
4KB

Download
memory/276-6-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download