floxif | 771e1c6068ea8571bb2e4c17ffedc2523451b6164b66dde2bd8a64b5712f6db6

Analysis

max time kernel
94s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
16-12-2024 00:29

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General

Target

771e1c6068ea8571bb2e4c17ffedc2523451b6164b66dde2bd8a64b5712f6db6N.exe
Size

197KB
MD5

e8846ce060729b155781d7aac0349e80
SHA1

ef8ce68da61a3febcb798a76c4f163a01eab4072
SHA256

771e1c6068ea8571bb2e4c17ffedc2523451b6164b66dde2bd8a64b5712f6db6
SHA512

3ab8d62ced5ce640941d2039dea8dbef478ef51b589e7757136d0476eb5fcc8cccb3f5d4263a3f1452238eabf65a5330e2ddbe38e02c9c9c46c17a198f3d5066
SSDEEP

6144:T2VB0SLpXGu6cgEwT6+gXEwT6+gXkEBV+UdvrEFp7hK38L:iVB0SsX1S5EBjvrEH7eg

Score

10^/10

floxif backdoor discovery 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/0x000c000000023b7e-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000c000000023b7e-1.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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	771e1c6068ea8571bb2e4c17ffedc2523451b6164b66dde2bd8a64b5712f6db6N.exe

Loads dropped DLL 1 IoCs

pid	Process
5080	771e1c6068ea8571bb2e4c17ffedc2523451b6164b66dde2bd8a64b5712f6db6N.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000c000000023b7e-1.dat	upx
behavioral2/memory/5080-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/5080-9-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	771e1c6068ea8571bb2e4c17ffedc2523451b6164b66dde2bd8a64b5712f6db6N.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 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	771e1c6068ea8571bb2e4c17ffedc2523451b6164b66dde2bd8a64b5712f6db6N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5080	771e1c6068ea8571bb2e4c17ffedc2523451b6164b66dde2bd8a64b5712f6db6N.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 5080 wrote to memory of 4868	5080	771e1c6068ea8571bb2e4c17ffedc2523451b6164b66dde2bd8a64b5712f6db6N.exe	84
PID 5080 wrote to memory of 4868	5080	771e1c6068ea8571bb2e4c17ffedc2523451b6164b66dde2bd8a64b5712f6db6N.exe	84
PID 5080 wrote to memory of 4868	5080	771e1c6068ea8571bb2e4c17ffedc2523451b6164b66dde2bd8a64b5712f6db6N.exe	84

C:\Users\Admin\AppData\Local\Temp\771e1c6068ea8571bb2e4c17ffedc2523451b6164b66dde2bd8a64b5712f6db6N.exe
"C:\Users\Admin\AppData\Local\Temp\771e1c6068ea8571bb2e4c17ffedc2523451b6164b66dde2bd8a64b5712f6db6N.exe"
1⤵
- Checks computer location settings
- Loads dropped DLL
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5080
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /delete /tn "SmadavSecondaryUpdater" /f
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4868

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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

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

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/5080-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/5080-6-0x00000000005A1000-0x00000000005A2000-memory.dmp

Filesize
4KB

Download
memory/5080-9-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/5080-7-0x00000000005A0000-0x00000000005BF000-memory.dmp

Filesize
124KB

Download