floxif | f37c66290615525b1226b8189b8462135af1b1e88034a41ca47107498055b604

Analysis

max time kernel
19s
max time network
16s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
26-12-2024 19:50

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General

Target

f37c66290615525b1226b8189b8462135af1b1e88034a41ca47107498055b604N.dll
Size

241KB
MD5

8b79e5182923b1cb542a4d0a065e9860
SHA1

f819196bf93221f6760a943f080f63c90504efc7
SHA256

f37c66290615525b1226b8189b8462135af1b1e88034a41ca47107498055b604
SHA512

d1cff7fe66f999a29b9a6c325762df47d6584e4d274888d08550ffec98b51e381c22aa019dd2632d15898ad2c64a589a7247186af0f947d18b0534c97d430f76
SSDEEP

6144:GTWYCAvCMeFF3sTnvOTB5VsQvMRlkM4RD/qzMfUpFg:GKYTuFFmnvOT7MRGM4h/qofkg

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/0x000d000000012261-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x000d000000012261-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
2340	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000d000000012261-1.dat	upx
behavioral1/memory/2340-3-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral1/memory/2340-6-0x0000000010000000-0x0000000010033000-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	2340	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2500 wrote to memory of 2340	2500	rundll32.exe	30
PID 2500 wrote to memory of 2340	2500	rundll32.exe	30
PID 2500 wrote to memory of 2340	2500	rundll32.exe	30
PID 2500 wrote to memory of 2340	2500	rundll32.exe	30
PID 2500 wrote to memory of 2340	2500	rundll32.exe	30
PID 2500 wrote to memory of 2340	2500	rundll32.exe	30
PID 2500 wrote to memory of 2340	2500	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f37c66290615525b1226b8189b8462135af1b1e88034a41ca47107498055b604N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2500
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f37c66290615525b1226b8189b8462135af1b1e88034a41ca47107498055b604N.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2340

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
71KB

MD5
4fcd7574537cebec8e75b4e646996643

SHA1
efa59bb9050fb656b90d5d40c942fb2a304f2a8b

SHA256
8ea3b17e4b783ffc0bc387b81b823bf87af0d57da74541d88ba85314bb232a5d

SHA512
7f1a7ef64d332a735db82506b47d84853af870785066d29ccaf4fdeab114079a9f0db400e01ba574776a0d652a248658fe1e8f9659cdced19ad6eea09644ea3e

Download Submit
memory/2340-3-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/2340-4-0x0000000074CC0000-0x0000000074CE9000-memory.dmp

Filesize
164KB

Download
memory/2340-6-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download