floxif | bb1e1dceb34349e63d847231fad41f5d0844367ab3c385fa24ff35e06252b811

Analysis

max time kernel
14s
max time network
19s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
07-01-2025 04:50

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General

Target

bb1e1dceb34349e63d847231fad41f5d0844367ab3c385fa24ff35e06252b811.dll
Size

207KB
MD5

d020390864964ca9a01151d43ec30765
SHA1

9934fb71d703f2a2d54f9e686a6a5e8bd8b121a4
SHA256

bb1e1dceb34349e63d847231fad41f5d0844367ab3c385fa24ff35e06252b811
SHA512

60a0ce5bd959f9e0e16409b3f7e86afe93a26e85b0919df8d572b27c6c1a464f14c0b2daabb34011de309e1ada30218d3f00dbb3af933d51b199b01ba7f3ffe4
SSDEEP

6144:mg1CoRj0mroJ+U65/lPBV+UdvrEFp7hKaP:HCoRjPrU+U65/FBjvrEH75P

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/0x000a00000001225c-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x000a00000001225c-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
1516	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000a00000001225c-1.dat	upx
behavioral1/memory/1516-3-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/1516-6-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

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

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

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1516	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2388 wrote to memory of 1516	2388	rundll32.exe	29
PID 2388 wrote to memory of 1516	2388	rundll32.exe	29
PID 2388 wrote to memory of 1516	2388	rundll32.exe	29
PID 2388 wrote to memory of 1516	2388	rundll32.exe	29
PID 2388 wrote to memory of 1516	2388	rundll32.exe	29
PID 2388 wrote to memory of 1516	2388	rundll32.exe	29
PID 2388 wrote to memory of 1516	2388	rundll32.exe	29

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\bb1e1dceb34349e63d847231fad41f5d0844367ab3c385fa24ff35e06252b811.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2388
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\bb1e1dceb34349e63d847231fad41f5d0844367ab3c385fa24ff35e06252b811.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:1516

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/1516-3-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1516-6-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

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