floxif | 37c2edf58bd2f83f8d865b06ca631b16dedd1c1ba8c56ea8fc1616791844d183

Analysis

max time kernel
93s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
25-12-2024 16:04

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General

Target

37c2edf58bd2f83f8d865b06ca631b16dedd1c1ba8c56ea8fc1616791844d183N.dll
Size

597KB
MD5

6580681757d7fb1f44ad2fdc6b92ca20
SHA1

f901fd8a61e80c19f474f443011fa24f1c5fbcab
SHA256

37c2edf58bd2f83f8d865b06ca631b16dedd1c1ba8c56ea8fc1616791844d183
SHA512

7d1e5b2169c13c4c5ab84deaf13e595d1ffc35db03898276e92d0cb55565a8a570e6679cf975801658c8ee4984cd48b751d9792165cd5b07f0443b5f66a31680
SSDEEP

12288:FSdK4MVDr7vRgndOBBtCVUPMvk2CqvAmYac8MRGM4h/qofchQ:FSd38r7ZgdOBHCVk2CqvAic8MRGJ/qoJ

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
behavioral2/files/0x0009000000023c9f-3.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0009000000023c9f-3.dat	acprotect

Loads dropped DLL 2 IoCs

pid	Process
3488	rundll32.exe
3488	rundll32.exe

Network Service Discovery 1 TTPs 1 IoCs

Attempt to gather information on host's network.

discovery

Network Service Discovery

T1046

pid	Process
4280	arp.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3488-7-0x0000000002E40000-0x0000000002E73000-memory.dmp	upx
behavioral2/files/0x0009000000023c9f-3.dat	upx
behavioral2/memory/3488-10-0x0000000002E40000-0x0000000002E73000-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 2 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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3488	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 524 wrote to memory of 3488	524	rundll32.exe	83
PID 524 wrote to memory of 3488	524	rundll32.exe	83
PID 524 wrote to memory of 3488	524	rundll32.exe	83
PID 3488 wrote to memory of 4280	3488	rundll32.exe	84
PID 3488 wrote to memory of 4280	3488	rundll32.exe	84
PID 3488 wrote to memory of 4280	3488	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\37c2edf58bd2f83f8d865b06ca631b16dedd1c1ba8c56ea8fc1616791844d183N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:524
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\37c2edf58bd2f83f8d865b06ca631b16dedd1c1ba8c56ea8fc1616791844d183N.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3488
- - C:\Windows\SysWOW64\arp.exe
    arp -a
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:4280

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
71KB

MD5
4fcd7574537cebec8e75b4e646996643

SHA1
efa59bb9050fb656b90d5d40c942fb2a304f2a8b

SHA256
8ea3b17e4b783ffc0bc387b81b823bf87af0d57da74541d88ba85314bb232a5d

SHA512
7f1a7ef64d332a735db82506b47d84853af870785066d29ccaf4fdeab114079a9f0db400e01ba574776a0d652a248658fe1e8f9659cdced19ad6eea09644ea3e

Download Submit
memory/3488-7-0x0000000002E40000-0x0000000002E73000-memory.dmp

Filesize
204KB

Download
memory/3488-6-0x0000000002E40000-0x0000000002E73000-memory.dmp

Filesize
204KB

Download
memory/3488-10-0x0000000002E40000-0x0000000002E73000-memory.dmp

Filesize
204KB

Download