floxif | f34ebc6b10ed8c5ccc4b8b211fde08eb062c03e66fb5005b2d5bda280a73bf94

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
17-12-2024 12:24

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General

Target

f34ebc6b10ed8c5ccc4b8b211fde08eb062c03e66fb5005b2d5bda280a73bf94N.dll
Size

1.8MB
MD5

b5bef268a344c03bd34ccab3666d7100
SHA1

31496de1e9a9bdb0773ff91c601475d2ebf9b4e4
SHA256

f34ebc6b10ed8c5ccc4b8b211fde08eb062c03e66fb5005b2d5bda280a73bf94
SHA512

06982b59ab7cdeb22bde9a0d7a5ed84cf0a8f32e273c95cc3453d696dc36bdb8ccc8ddbb62c5bcb07da5a2dd572967d613ba996a8da03af4f94fbf3fdfc9c1b9
SSDEEP

24576:phQtKE8quveQ6NbPwbmy4nt2YAp5iAaSx/zWjTvrzVnc1dVf7x11IvN6CsX2wnJF:gv2eSdMPOxP1OefQUT8xElF1qXub

Score

10^/10

floxif backdoor discovery persistence privilege_escalation 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/0x0033000000023b70-1.dat	floxif

Event Triggered Execution: AppInit DLLs 1 TTPs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
persistence privilege_escalation

AppInit DLLs
T1546.010

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0033000000023b70-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
1332	rundll32.exe

Network Service Discovery 1 TTPs 1 IoCs

Attempt to gather information on host's network.

discovery

Network Service Discovery

T1046

pid	Process
1060	arp.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0033000000023b70-1.dat	upx
behavioral2/memory/1332-4-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral2/memory/1332-21-0x0000000010000000-0x0000000010033000-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	1332	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2168 wrote to memory of 1332	2168	rundll32.exe	82
PID 2168 wrote to memory of 1332	2168	rundll32.exe	82
PID 2168 wrote to memory of 1332	2168	rundll32.exe	82

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f34ebc6b10ed8c5ccc4b8b211fde08eb062c03e66fb5005b2d5bda280a73bf94N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2168
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f34ebc6b10ed8c5ccc4b8b211fde08eb062c03e66fb5005b2d5bda280a73bf94N.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:1332
- - C:\Windows\SysWOW64\arp.exe
    arp -a
    3⤵
    - Network Service Discovery
    PID:1060

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

Privilege Escalation

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

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

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

Filesize
71KB

MD5
4fcd7574537cebec8e75b4e646996643

SHA1
efa59bb9050fb656b90d5d40c942fb2a304f2a8b

SHA256
8ea3b17e4b783ffc0bc387b81b823bf87af0d57da74541d88ba85314bb232a5d

SHA512
7f1a7ef64d332a735db82506b47d84853af870785066d29ccaf4fdeab114079a9f0db400e01ba574776a0d652a248658fe1e8f9659cdced19ad6eea09644ea3e

Download Submit
C:\Users\Admin\AppData\LocalLow\SogouPY.users\acc.dat.wtm

Filesize
80B

MD5
c1ea7f7f6ef9a1700231683ad20cc0fd

SHA1
afdff8ec75ca64f67c9327f6669f78697ea5234c

SHA256
4ea9a4dedbb5c4adbe4d8a490d8302c6c1285af71d669ed03801521f6c32b390

SHA512
0758a99dba5accd5e4d8d9811930f962b9f63e91e135d2d6f3497a55b5f674ac23d2622abc6bd58595f31beb1cfdbb62d1f6c785c13969e3a579cb9223674d1d

Download Submit
memory/1332-4-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/1332-21-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download