floxif | b4bb6308c50aa8c64366cf085db811e9ba7b2bffb3c6e4e202f0558326ef4626

General

Target

b4bb6308c50aa8c64366cf085db811e9ba7b2bffb3c6e4e202f0558326ef4626.exe
Size

286KB
MD5

4dbb098ea00f6a0e8e96873dba4cf46a
SHA1

646e2ef5aabbe5f71fe34b9469b382785c4e0b06
SHA256

b4bb6308c50aa8c64366cf085db811e9ba7b2bffb3c6e4e202f0558326ef4626
SHA512

0a6855f2c0d5d29ef11a350f8e46a3966657cccc1f1879aead0ca90e601604e47d5824dcc9b72fb4f39c37ce5fb6ccd2e7b4579f2f3b63f1220d4374cae88bd8
SSDEEP

6144:J7gKNkhSCBkHouyXnZhB+R8WHqBV+UdvrEFp7hKdc:J7gKNkhTxuyXnPB+R8WHqBjvrEH78c

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/0x000c000000023c4a-1.dat	floxif

Downloads MZ/PE file 1 IoCs

flow	pid	Process
54	4892	Process not Found

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/0x000c000000023c4a-1.dat	acprotect

Loads dropped DLL 3 IoCs

pid	Process
1480	b4bb6308c50aa8c64366cf085db811e9ba7b2bffb3c6e4e202f0558326ef4626.exe
4428	Process not Found
552	MicrosoftEdgeUpdate.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000c000000023c4a-1.dat	upx
behavioral2/memory/1480-3-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/1480-6-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/552-10-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/552-17-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	b4bb6308c50aa8c64366cf085db811e9ba7b2bffb3c6e4e202f0558326ef4626.exe

System Location Discovery: System Language Discovery 1 TTPs 2 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	b4bb6308c50aa8c64366cf085db811e9ba7b2bffb3c6e4e202f0558326ef4626.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MicrosoftEdgeUpdate.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
552	MicrosoftEdgeUpdate.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1480	b4bb6308c50aa8c64366cf085db811e9ba7b2bffb3c6e4e202f0558326ef4626.exe
Token: SeDebugPrivilege	552	MicrosoftEdgeUpdate.exe

C:\Users\Admin\AppData\Local\Temp\b4bb6308c50aa8c64366cf085db811e9ba7b2bffb3c6e4e202f0558326ef4626.exe
"C:\Users\Admin\AppData\Local\Temp\b4bb6308c50aa8c64366cf085db811e9ba7b2bffb3c6e4e202f0558326ef4626.exe"
1⤵
- Loads dropped DLL
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1480

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSIxIiBpbnN0YWxsZGF0ZXRpbWU9IjE3Mzg5NDQ5MjgiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4MzQxNzQzMjM4OTAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI0OTE3OTExODU5Ii8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
- Suspicious use of AdjustPrivilegeToken
PID:552

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

Privilege Escalation

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/552-10-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/552-11-0x0000000075360000-0x0000000075586000-memory.dmp

Filesize
2.1MB

Download
memory/552-17-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1480-3-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1480-5-0x00000000002B0000-0x00000000002E7000-memory.dmp

Filesize
220KB

Download
memory/1480-6-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download

Analysis

Sharing