floxif | 201036c4387369e63c11a56571f6f540874a5605592db368431ab1e86be76bb2

Analysis

max time kernel
96s
max time network
97s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
19/12/2024, 00:06

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General

Target

201036c4387369e63c11a56571f6f540874a5605592db368431ab1e86be76bb2N.dll
Size

1.5MB
MD5

29fe922e1390597ec7adb9182cb31670
SHA1

3610b4e0f739cc3f6f5a775f286e7c84c0450a97
SHA256

201036c4387369e63c11a56571f6f540874a5605592db368431ab1e86be76bb2
SHA512

3625f64c7272a758902eeb2c2f8f892fb6f434ed1f0b18229f1bc04c8619a332bd1796194264aaed4bf8028c2c5ab1ad6ff1e827d7e050902d02e390c30df788
SSDEEP

24576:naM84oHVJQgsGNbBNXjo2dj7MM1ebXh040Uf5GtaudomjI23yvNHm0L4+kMRGJ/s:aM84wL7U2pIM1KhcUf5Gt3db0b491qL

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/0x000c000000023aed-4.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000c000000023aed-4.dat	acprotect

Loads dropped DLL 2 IoCs

pid	Process
4912	rundll32.exe
4912	rundll32.exe

Network Service Discovery 1 TTPs 9 IoCs

Attempt to gather information on host's network.

discovery

Network Service Discovery

T1046

pid	Process
3140	arp.exe
1928	arp.exe
3760	arp.exe
2468	arp.exe
4572	arp.exe
1852	arp.exe
4520	arp.exe
4744	arp.exe
804	arp.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\rundll32.rpt	rundll32.exe
File created	C:\Windows\SysWOW64\rundll32.dmp	rundll32.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4912-1-0x0000000010000000-0x000000001048E000-memory.dmp	upx
behavioral2/files/0x000c000000023aed-4.dat	upx
behavioral2/memory/4912-7-0x0000000002990000-0x00000000029C3000-memory.dmp	upx
behavioral2/memory/4912-15-0x0000000010000000-0x000000001048E000-memory.dmp	upx
behavioral2/memory/4912-17-0x0000000002990000-0x00000000029C3000-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

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1884	4912	WerFault.exe	83

System Location Discovery: System Language Discovery 1 TTPs 10 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	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4912	rundll32.exe
4912	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4912	rundll32.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3428 wrote to memory of 4912	3428	rundll32.exe	83
PID 3428 wrote to memory of 4912	3428	rundll32.exe	83
PID 3428 wrote to memory of 4912	3428	rundll32.exe	83
PID 4912 wrote to memory of 3140	4912	rundll32.exe	84
PID 4912 wrote to memory of 3140	4912	rundll32.exe	84
PID 4912 wrote to memory of 3140	4912	rundll32.exe	84
PID 4912 wrote to memory of 4572	4912	rundll32.exe	88
PID 4912 wrote to memory of 4572	4912	rundll32.exe	88
PID 4912 wrote to memory of 4572	4912	rundll32.exe	88
PID 4912 wrote to memory of 804	4912	rundll32.exe	89
PID 4912 wrote to memory of 804	4912	rundll32.exe	89
PID 4912 wrote to memory of 804	4912	rundll32.exe	89
PID 4912 wrote to memory of 4744	4912	rundll32.exe	90
PID 4912 wrote to memory of 4744	4912	rundll32.exe	90
PID 4912 wrote to memory of 4744	4912	rundll32.exe	90
PID 4912 wrote to memory of 2468	4912	rundll32.exe	91
PID 4912 wrote to memory of 2468	4912	rundll32.exe	91
PID 4912 wrote to memory of 2468	4912	rundll32.exe	91
PID 4912 wrote to memory of 3760	4912	rundll32.exe	92
PID 4912 wrote to memory of 3760	4912	rundll32.exe	92
PID 4912 wrote to memory of 3760	4912	rundll32.exe	92
PID 4912 wrote to memory of 1928	4912	rundll32.exe	93
PID 4912 wrote to memory of 1928	4912	rundll32.exe	93
PID 4912 wrote to memory of 1928	4912	rundll32.exe	93
PID 4912 wrote to memory of 4520	4912	rundll32.exe	94
PID 4912 wrote to memory of 4520	4912	rundll32.exe	94
PID 4912 wrote to memory of 4520	4912	rundll32.exe	94
PID 4912 wrote to memory of 1852	4912	rundll32.exe	95
PID 4912 wrote to memory of 1852	4912	rundll32.exe	95
PID 4912 wrote to memory of 1852	4912	rundll32.exe	95

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\201036c4387369e63c11a56571f6f540874a5605592db368431ab1e86be76bb2N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3428
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\201036c4387369e63c11a56571f6f540874a5605592db368431ab1e86be76bb2N.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4912
- - C:\Windows\SysWOW64\arp.exe
    arp -a
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:3140
- - C:\Windows\SysWOW64\arp.exe
    arp -s 10.127.0.1 1c-dd-d2-9b-49-4f
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:4572
- - C:\Windows\SysWOW64\arp.exe
    arp -s 10.127.255.255 d6-af-f4-77-cc-ea
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:804
- - C:\Windows\SysWOW64\arp.exe
    arp -s 37.27.61.185 04-1f-f6-02-4f-8e
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:4744
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.22 42-d0-cb-88-69-ea
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:2468
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.251 a3-ef-53-34-ff-9a
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:3760
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.252 32-d9-a4-7d-50-9f
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:1928
- - C:\Windows\SysWOW64\arp.exe
    arp -s 239.255.255.250 60-25-da-5b-5d-6c
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:4520
- - C:\Windows\SysWOW64\arp.exe
    arp -s 255.255.255.255 29-17-74-ac-f7-07
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:1852
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4912 -s 884
    3⤵
    - Program crash
    PID:1884

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 368 -p 4912 -ip 4912
1⤵
PID:4664

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/4912-1-0x0000000010000000-0x000000001048E000-memory.dmp

Filesize
4.6MB

Download
memory/4912-8-0x000000001048A000-0x000000001048B000-memory.dmp

Filesize
4KB

Download
memory/4912-7-0x0000000002990000-0x00000000029C3000-memory.dmp

Filesize
204KB

Download
memory/4912-15-0x0000000010000000-0x000000001048E000-memory.dmp

Filesize
4.6MB

Download
memory/4912-17-0x0000000002990000-0x00000000029C3000-memory.dmp

Filesize
204KB

Download