floxif | aced37a56c47a574df45e4a3b83f57475f20e1b91599a76b81313ca4d0ff3625

Analysis

max time kernel
91s
max time network
132s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
05/09/2024, 12:25

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General

Target
2024-09-05_09845303f43891ef663c923526cc536a_floxif_mafia.exe
Size 2.5MB
Sample240905-plpaxa1frc
SHA256 aced37a56c47a574df45e4a3b83f57475f20e1b91599a76b81313ca4d0ff3625
MD5 09845303f43891ef663c923526cc536a
SHA1 adb9f9697e41f0ed39ecc9825df5e50499eeb930
SHA512 484204852da456a773e873a888a26abd5fb29ffbf9fd0f806cbb75f9a6a618c7688305e12b1ddd58485a910ec1e51c40403f09ef9b1f83d8e3f727dcc380789b
SSDEEP 49152:9uIIKPofs2hPd2l177BTK2VbDsar1YDjT:9jCfs2hPIl1/o
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

floxif backdoor discovery 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/0x00080000000234d5-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x00080000000234d5-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
4200	2024-09-05_09845303f43891ef663c923526cc536a_floxif_mafia.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x00080000000234d5-1.dat	upx
behavioral2/memory/4200-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4200-13-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Enumerates connected drives 3 TTPs 1 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)	\??\e:	2024-09-05_09845303f43891ef663c923526cc536a_floxif_mafia.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	2024-09-05_09845303f43891ef663c923526cc536a_floxif_mafia.exe

Program crash 3 IoCs

pid	pid_target	Process	procid_target
5116	4200	WerFault.exe	84
1664	4200	WerFault.exe	84
1276	4200	WerFault.exe	84

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	2024-09-05_09845303f43891ef663c923526cc536a_floxif_mafia.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4200	2024-09-05_09845303f43891ef663c923526cc536a_floxif_mafia.exe
4200	2024-09-05_09845303f43891ef663c923526cc536a_floxif_mafia.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4200	2024-09-05_09845303f43891ef663c923526cc536a_floxif_mafia.exe

C:\Users\Admin\AppData\Local\Temp\2024-09-05_09845303f43891ef663c923526cc536a_floxif_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2024-09-05_09845303f43891ef663c923526cc536a_floxif_mafia.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4200
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4200 -s 908
  2⤵
  - Program crash
  PID:5116
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4200 -s 836
  2⤵
  - Program crash
  PID:1664
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4200 -s 928
  2⤵
  - Program crash
  PID:1276

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4200 -ip 4200
1⤵
PID:4672

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 4200 -ip 4200
1⤵
PID:4636

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 4200 -ip 4200
1⤵
PID:1876

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

symsrv.dll

Path C:\Program Files\Common Files\System\symsrv.dll
Size 67KB
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab
SSDEEP 1536:YjV8y93KQpFQmPLRk7G50zy/riF12jvRyo0hQk7ZL:c8y93KQjy7G55riF1cMo03V
MD5 SHA1 SHA512 SSDEEP

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memory/4200-4-0x0000000010000000-0x0000000010030000-memory.dmp

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memory/4200-6-0x0000000000791000-0x0000000000792000-memory.dmp

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memory/4200-13-0x0000000010000000-0x0000000010030000-memory.dmp

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memory/4200-11-0x0000000000790000-0x00000000009FA000-memory.dmp

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