floxif | 9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2c

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
05/10/2024, 12:05

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General

Target

9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe
Size

558KB
MD5

11af86bfe08da696898f2ac4909337c0
SHA1

5d55188a73bdd9e2090a917c68be69e2e4033935
SHA256

9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2c
SHA512

b06712087203e7dba0c23d86006e4064eada85648bbd667a1f0fe4ff912c5d3abe185d10358cd2fcc643afcaf4c07c750f1e4b92f6b33eb7979fec8e4331b74d
SSDEEP

6144:DgRzmsiuvAJ+tTm6cyERSiytj71c4E4lKS6v3sQvMRlkM4RD/qzMfUz:DxCvAJ+q6ctRt6364flOBMRGM4h/qofG

Score

10^/10

floxif backdoor discovery persistence spyware stealer trojan upx

Malware Config

Signatures

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/0x000900000002341d-2.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000900000002341d-2.dat	acprotect

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe

Executes dropped EXE 1 IoCs

pid	Process
3472	msn.exe

Loads dropped DLL 1 IoCs

pid	Process
2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\apo5 = "C:\\Program Files (x86)\\win\\msn.exe"	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe

Enumerates connected drives 3 TTPs 24 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\l:	msn.exe
File opened (read-only)	\??\m:	msn.exe
File opened (read-only)	\??\q:	msn.exe
File opened (read-only)	\??\s:	msn.exe
File opened (read-only)	\??\e:	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe
File opened (read-only)	\??\a:	msn.exe
File opened (read-only)	\??\b:	msn.exe
File opened (read-only)	\??\h:	msn.exe
File opened (read-only)	\??\t:	msn.exe
File opened (read-only)	\??\u:	msn.exe
File opened (read-only)	\??\x:	msn.exe
File opened (read-only)	\??\y:	msn.exe
File opened (read-only)	\??\z:	msn.exe
File opened (read-only)	\??\g:	msn.exe
File opened (read-only)	\??\j:	msn.exe
File opened (read-only)	\??\k:	msn.exe
File opened (read-only)	\??\r:	msn.exe
File opened (read-only)	\??\w:	msn.exe
File opened (read-only)	\??\p:	msn.exe
File opened (read-only)	\??\v:	msn.exe
File opened (read-only)	\??\e:	msn.exe
File opened (read-only)	\??\i:	msn.exe
File opened (read-only)	\??\n:	msn.exe
File opened (read-only)	\??\o:	msn.exe

Network Service Discovery 1 TTPs 9 IoCs

Attempt to gather information on host's network.

discovery

Network Service Discovery

T1046

pid	Process
5048	arp.exe
5104	arp.exe
4068	arp.exe
4800	arp.exe
3396	arp.exe
2532	arp.exe
1072	arp.exe
4976	arp.exe
2876	arp.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000900000002341d-2.dat	upx
behavioral2/memory/2948-5-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral2/memory/2948-11-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral2/memory/2948-10-0x0000000010000000-0x0000000010033000-memory.dmp	upx
behavioral2/memory/2948-28-0x0000000010000000-0x0000000010033000-memory.dmp	upx

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe
File opened for modification	C:\Program Files (x86)\win	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe
File created	C:\Program Files (x86)\win\msn.exe	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe
File opened for modification	C:\Program Files (x86)\win\msn.exe	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 12 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	msn.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	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.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

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\Software\Microsoft\Internet Explorer\IntelliForms\Storage2	msn.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe
2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe
2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe
2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3472	msn.exe

Suspicious behavior: LoadsDriver 2 IoCs

pid	Process
660	Process not Found
660	Process not Found

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 2948 wrote to memory of 1072	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	82
PID 2948 wrote to memory of 1072	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	82
PID 2948 wrote to memory of 1072	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	82
PID 2948 wrote to memory of 4976	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	84
PID 2948 wrote to memory of 4976	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	84
PID 2948 wrote to memory of 4976	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	84
PID 2948 wrote to memory of 2532	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	85
PID 2948 wrote to memory of 2532	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	85
PID 2948 wrote to memory of 2532	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	85
PID 2948 wrote to memory of 2876	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	86
PID 2948 wrote to memory of 2876	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	86
PID 2948 wrote to memory of 2876	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	86
PID 2948 wrote to memory of 3396	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	87
PID 2948 wrote to memory of 3396	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	87
PID 2948 wrote to memory of 3396	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	87
PID 2948 wrote to memory of 4800	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	88
PID 2948 wrote to memory of 4800	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	88
PID 2948 wrote to memory of 4800	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	88
PID 2948 wrote to memory of 4068	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	89
PID 2948 wrote to memory of 4068	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	89
PID 2948 wrote to memory of 4068	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	89
PID 2948 wrote to memory of 5104	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	90
PID 2948 wrote to memory of 5104	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	90
PID 2948 wrote to memory of 5104	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	90
PID 2948 wrote to memory of 5048	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	92
PID 2948 wrote to memory of 5048	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	92
PID 2948 wrote to memory of 5048	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	92
PID 2948 wrote to memory of 892	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	100
PID 2948 wrote to memory of 892	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	100
PID 2948 wrote to memory of 892	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	100
PID 2948 wrote to memory of 3472	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	106
PID 2948 wrote to memory of 3472	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	106
PID 2948 wrote to memory of 3472	2948	9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe	106

C:\Users\Admin\AppData\Local\Temp\9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe
"C:\Users\Admin\AppData\Local\Temp\9fbd4c799eff57fa744ca341a5d930bc41a32b35fd5a03eb802e5c556006fb2cN.exe"
1⤵
- Checks computer location settings
- Loads dropped DLL
- Adds Run key to start application
- Enumerates connected drives
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2948
- C:\Windows\SysWOW64\arp.exe
  arp -a
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:1072
- C:\Windows\SysWOW64\arp.exe
  arp -s 10.127.0.1 e9-04-eb-fb-18-da
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:4976
- C:\Windows\SysWOW64\arp.exe
  arp -s 10.127.255.255 36-e9-63-47-9c-da
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:2532
- C:\Windows\SysWOW64\arp.exe
  arp -s 37.27.61.183 4b-2b-a3-1f-8f-63
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:2876
- C:\Windows\SysWOW64\arp.exe
  arp -s 224.0.0.22 e1-74-ec-f1-4d-f4
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:3396
- C:\Windows\SysWOW64\arp.exe
  arp -s 224.0.0.251 34-c8-53-92-28-3f
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:4800
- C:\Windows\SysWOW64\arp.exe
  arp -s 224.0.0.252 dd-ba-29-9d-22-be
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:4068
- C:\Windows\SysWOW64\arp.exe
  arp -s 239.255.255.250 ce-47-e6-a9-ac-a4
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:5104
- C:\Windows\SysWOW64\arp.exe
  arp -s 255.255.255.255 e1-22-31-69-76-69
  2⤵
  - Network Service Discovery
  - System Location Discovery: System Language Discovery
  PID:5048
- C:\Windows\SysWOW64\arp.exe
  arp -d
  2⤵
  - System Location Discovery: System Language Discovery
  PID:892
- C:\Program Files (x86)\win\msn.exe
  "C:\Program Files (x86)\win\msn.exe"
  2⤵
  - Executes dropped EXE
  - Enumerates connected drives
  - System Location Discovery: System Language Discovery
  - Modifies Internet Explorer settings
  - Suspicious behavior: GetForegroundWindowSpam
  PID:3472

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Network Service Discovery

T1046

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

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\Local\Temp\A1D26E2\B2E5C90B84.tmp

Filesize
478KB

MD5
1e27117eb1b38cf480b4c6f0b4373063

SHA1
c10a36ea81d82d431100ec7f0b842d977c9bf2b8

SHA256
1823fca810851bc73e9a4f8ec3dc23b4136f9317c557cadc7189867ace661d24

SHA512
89b5868702ac8093f409934be3e6fc39d0555a7945308aed336cc11d83d89718636cc42485717e433c7a9e16b6cd621651ffca6f28732524e89d3be408db1232

Download Submit
memory/2948-0-0x0000000000400000-0x00000000004D2000-memory.dmp

Filesize
840KB

Download
memory/2948-5-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/2948-9-0x0000000000400000-0x00000000004D2000-memory.dmp

Filesize
840KB

Download
memory/2948-11-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/2948-10-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/2948-27-0x0000000000400000-0x00000000004D2000-memory.dmp

Filesize
840KB

Download
memory/2948-28-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/3472-24-0x0000000000400000-0x00000000004D2000-memory.dmp

Filesize
840KB

Download
memory/3472-29-0x0000000000400000-0x00000000004D2000-memory.dmp

Filesize
840KB

Download
memory/3472-30-0x0000000000400000-0x00000000004D2000-memory.dmp

Filesize
840KB

Download