floxif | 673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29

General

Target

673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe
Size

1.9MB
MD5

fbd35f40b997df1118358e59277e0a70
SHA1

2a92c3b4f1ad634b97d8d81ae4919f8606e9916e
SHA256

673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29
SHA512

98094dcc847c95edad0d52376cad80b0b28b73cc1eda762235093daad5b033d15ab6c19f6a5390e18ff4ad038a54132ef479d2c330e901aea216750f80ebb8c4
SSDEEP

24576:fhHW4GQ+PLjFNvCJ9t6rG3SPGjqZO8+9z61UIPlIr91w0rI9mAS+yfQToerEH7S:f1XGFFCqq+O97IP+WFS+yfQT9

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/0x00090000000233e4-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x00090000000233e4-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
4856	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe

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:	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x00090000000233e4-1.dat	upx
behavioral2/memory/4856-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4856-16-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4856-17-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4856-25-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4856-30-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4856-36-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe
File created	\??\c:\program files\common files\system\symsrv.dll.000	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.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	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe

Modifies registry class 12 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Applications\i_view32.exe\shell	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\IrfanView	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\IrfanView\ = "IrfanView"	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\IrfanView\shell\open\command	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\IrfanView\shell\open	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\IrfanView\shell\open\command\ = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe\" \"%1\""	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Applications\i_view32.exe\shell\open\command	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Applications\i_view32.exe	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\IrfanView\shell	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Applications	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Applications\i_view32.exe\shell\open	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Applications\i_view32.exe\shell\open\command\ = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe\" \"%1\""	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4856	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe
4856	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe
4856	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe
4856	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe
4856	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe
4856	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4856	673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe

C:\Users\Admin\AppData\Local\Temp\673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe
"C:\Users\Admin\AppData\Local\Temp\673238c154f07524e0dbe8226c2a641eaf292a5a076db682c0ed9a296f9e6b29N.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4856

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

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
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
C:\Program Files\Common Files\System\symsrv.dll.000

Filesize
175B

MD5
1130c911bf5db4b8f7cf9b6f4b457623

SHA1
48e734c4bc1a8b5399bff4954e54b268bde9d54c

SHA256
eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1

SHA512
94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

Download Submit
memory/4856-17-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4856-12-0x0000000075900000-0x0000000075963000-memory.dmp

Filesize
396KB

Download
memory/4856-15-0x0000000075900000-0x0000000075963000-memory.dmp

Filesize
396KB

Download
memory/4856-16-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4856-11-0x0000000075915000-0x0000000075916000-memory.dmp

Filesize
4KB

Download
memory/4856-20-0x0000000075915000-0x0000000075916000-memory.dmp

Filesize
4KB

Download
memory/4856-21-0x0000000075900000-0x0000000075963000-memory.dmp

Filesize
396KB

Download
memory/4856-24-0x0000000075900000-0x0000000075963000-memory.dmp

Filesize
396KB

Download
memory/4856-25-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4856-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4856-30-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4856-36-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download

Analysis

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