floxif | a5ec6bb8b7ee8d27cfd198a9642aec9cfd04c39d8a2faa2a4a66fcffb5a459d1

Analysis

max time kernel
15s
max time network
16s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
31-12-2024 09:21

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General

Target

a5ec6bb8b7ee8d27cfd198a9642aec9cfd04c39d8a2faa2a4a66fcffb5a459d1N.dll
Size

169KB
MD5

a91b0520b1cce6e4ba6b94ede2234860
SHA1

50520fbcb25e73f0eb935aa106475db4060f9803
SHA256

a5ec6bb8b7ee8d27cfd198a9642aec9cfd04c39d8a2faa2a4a66fcffb5a459d1
SHA512

8d51f86fd32850f3b5580f51a06116b3e9e5ab57cbe35fd852e40b670fac43897e42f274ea7d9e2f71b23d5798255c47210a596a18cc239b80a390b7b75213eb
SSDEEP

3072:5dkpj4FWgN+vecbGVUIiTyphTsQvVqRlkM4OAD/KLznBuB2JA2Bj6Y1TN:5d+j4oecbGJi6TsQvMRlkM4RD/qzMfU/

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/0x0007000000012117-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x0007000000012117-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
2400	rundll32.exe

Network Service Discovery 1 TTPs 9 IoCs

Attempt to gather information on host's network.

discovery

Network Service Discovery

T1046

pid	Process
2748	arp.exe
2816	arp.exe
2852	arp.exe
2832	arp.exe
2052	arp.exe
2360	arp.exe
2760	arp.exe
2312	arp.exe
2836	arp.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x0007000000012117-1.dat	upx
behavioral1/memory/2400-3-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral1/memory/2400-7-0x0000000010000000-0x0000000010033000-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

Program crash 1 IoCs

pid	pid_target	Process	procid_target
784	2400	WerFault.exe	30

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	rundll32.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

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2400	rundll32.exe

Suspicious use of WriteProcessMemory 47 IoCs

description	pid	Process	procid_target
PID 2384 wrote to memory of 2400	2384	rundll32.exe	30
PID 2384 wrote to memory of 2400	2384	rundll32.exe	30
PID 2384 wrote to memory of 2400	2384	rundll32.exe	30
PID 2384 wrote to memory of 2400	2384	rundll32.exe	30
PID 2384 wrote to memory of 2400	2384	rundll32.exe	30
PID 2384 wrote to memory of 2400	2384	rundll32.exe	30
PID 2384 wrote to memory of 2400	2384	rundll32.exe	30
PID 2400 wrote to memory of 2052	2400	rundll32.exe	32
PID 2400 wrote to memory of 2052	2400	rundll32.exe	32
PID 2400 wrote to memory of 2052	2400	rundll32.exe	32
PID 2400 wrote to memory of 2052	2400	rundll32.exe	32
PID 2400 wrote to memory of 784	2400	rundll32.exe	31
PID 2400 wrote to memory of 784	2400	rundll32.exe	31
PID 2400 wrote to memory of 784	2400	rundll32.exe	31
PID 2400 wrote to memory of 784	2400	rundll32.exe	31
PID 2400 wrote to memory of 2360	2400	rundll32.exe	34
PID 2400 wrote to memory of 2360	2400	rundll32.exe	34
PID 2400 wrote to memory of 2360	2400	rundll32.exe	34
PID 2400 wrote to memory of 2360	2400	rundll32.exe	34
PID 2400 wrote to memory of 2312	2400	rundll32.exe	35
PID 2400 wrote to memory of 2312	2400	rundll32.exe	35
PID 2400 wrote to memory of 2312	2400	rundll32.exe	35
PID 2400 wrote to memory of 2312	2400	rundll32.exe	35
PID 2400 wrote to memory of 2760	2400	rundll32.exe	36
PID 2400 wrote to memory of 2760	2400	rundll32.exe	36
PID 2400 wrote to memory of 2760	2400	rundll32.exe	36
PID 2400 wrote to memory of 2760	2400	rundll32.exe	36
PID 2400 wrote to memory of 2748	2400	rundll32.exe	37
PID 2400 wrote to memory of 2748	2400	rundll32.exe	37
PID 2400 wrote to memory of 2748	2400	rundll32.exe	37
PID 2400 wrote to memory of 2748	2400	rundll32.exe	37
PID 2400 wrote to memory of 2816	2400	rundll32.exe	38
PID 2400 wrote to memory of 2816	2400	rundll32.exe	38
PID 2400 wrote to memory of 2816	2400	rundll32.exe	38
PID 2400 wrote to memory of 2816	2400	rundll32.exe	38
PID 2400 wrote to memory of 2832	2400	rundll32.exe	39
PID 2400 wrote to memory of 2832	2400	rundll32.exe	39
PID 2400 wrote to memory of 2832	2400	rundll32.exe	39
PID 2400 wrote to memory of 2832	2400	rundll32.exe	39
PID 2400 wrote to memory of 2836	2400	rundll32.exe	40
PID 2400 wrote to memory of 2836	2400	rundll32.exe	40
PID 2400 wrote to memory of 2836	2400	rundll32.exe	40
PID 2400 wrote to memory of 2836	2400	rundll32.exe	40
PID 2400 wrote to memory of 2852	2400	rundll32.exe	41
PID 2400 wrote to memory of 2852	2400	rundll32.exe	41
PID 2400 wrote to memory of 2852	2400	rundll32.exe	41
PID 2400 wrote to memory of 2852	2400	rundll32.exe	41

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a5ec6bb8b7ee8d27cfd198a9642aec9cfd04c39d8a2faa2a4a66fcffb5a459d1N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2384
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\a5ec6bb8b7ee8d27cfd198a9642aec9cfd04c39d8a2faa2a4a66fcffb5a459d1N.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:2400
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2400 -s 308
    3⤵
    - Program crash
    PID:784
- - C:\Windows\SysWOW64\arp.exe
    arp -a
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:2052
- - C:\Windows\SysWOW64\arp.exe
    arp -s 10.127.0.1 78-f2-3e-eb-7f-75
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:2360
- - C:\Windows\SysWOW64\arp.exe
    arp -s 10.127.255.255 ed-60-9e-b8-a1-ef
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:2312
- - C:\Windows\SysWOW64\arp.exe
    arp -s 136.243.69.123 a6-73-c0-0d-1a-3c
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:2760
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.22 90-ac-fd-4c-bb-1c
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:2748
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.251 7a-85-5c-b8-8f-7f
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:2816
- - C:\Windows\SysWOW64\arp.exe
    arp -s 224.0.0.252 0a-a1-b6-e7-38-3e
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:2832
- - C:\Windows\SysWOW64\arp.exe
    arp -s 239.255.255.250 59-6d-a2-4d-8f-bc
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:2836
- - C:\Windows\SysWOW64\arp.exe
    arp -s 255.255.255.255 fc-f1-5f-bc-02-99
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:2852

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

Replay Monitor

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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/2400-3-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/2400-5-0x0000000074C00000-0x0000000074C15000-memory.dmp

Filesize
84KB

Download
memory/2400-7-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download