floxif | 726cbd366559996da2b2d8f1dd10886d6f9d9acacdfdfe365dc08ac888161ca3

General

Target

726cbd366559996da2b2d8f1dd10886d6f9d9acacdfdfe365dc08ac888161ca3N.exe
Size

6.7MB
MD5

2bf7f26cf9c6833ab520854828a0d7d0
SHA1

b00a05b81f0103b717df12719d1e87524c5b25f0
SHA256

726cbd366559996da2b2d8f1dd10886d6f9d9acacdfdfe365dc08ac888161ca3
SHA512

eb018bcef2813c90861fa0eded2157584648646b0bb9acfbda88f4084128bad1ebdbe771e30d574dafe37951c9aea5a577a977824cf2bda0e6f3a8a5953c0af5
SSDEEP

49152:ebSn6XSw4nF9tuaGlB1gecj+bsCGDlBIRez0U98ayOhP4lQEvZS3RhgJIC9Caona:ebSn6EnUfK+ICvQI+CgD3Z85XH9D

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
behavioral1/files/0x0011000000011c2c-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x0011000000011c2c-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
2272	726cbd366559996da2b2d8f1dd10886d6f9d9acacdfdfe365dc08ac888161ca3N.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:	726cbd366559996da2b2d8f1dd10886d6f9d9acacdfdfe365dc08ac888161ca3N.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x0011000000011c2c-1.dat	upx
behavioral1/memory/2272-3-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2272-14-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2272-18-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2272-22-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2272-26-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2272-30-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2272-34-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	726cbd366559996da2b2d8f1dd10886d6f9d9acacdfdfe365dc08ac888161ca3N.exe
File created	\??\c:\program files\common files\system\symsrv.dll.000	726cbd366559996da2b2d8f1dd10886d6f9d9acacdfdfe365dc08ac888161ca3N.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	726cbd366559996da2b2d8f1dd10886d6f9d9acacdfdfe365dc08ac888161ca3N.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2272	726cbd366559996da2b2d8f1dd10886d6f9d9acacdfdfe365dc08ac888161ca3N.exe
2272	726cbd366559996da2b2d8f1dd10886d6f9d9acacdfdfe365dc08ac888161ca3N.exe
2272	726cbd366559996da2b2d8f1dd10886d6f9d9acacdfdfe365dc08ac888161ca3N.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2272	726cbd366559996da2b2d8f1dd10886d6f9d9acacdfdfe365dc08ac888161ca3N.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2272 wrote to memory of 2488	2272	726cbd366559996da2b2d8f1dd10886d6f9d9acacdfdfe365dc08ac888161ca3N.exe	30
PID 2272 wrote to memory of 2488	2272	726cbd366559996da2b2d8f1dd10886d6f9d9acacdfdfe365dc08ac888161ca3N.exe	30
PID 2272 wrote to memory of 2488	2272	726cbd366559996da2b2d8f1dd10886d6f9d9acacdfdfe365dc08ac888161ca3N.exe	30
PID 2272 wrote to memory of 2488	2272	726cbd366559996da2b2d8f1dd10886d6f9d9acacdfdfe365dc08ac888161ca3N.exe	30

C:\Users\Admin\AppData\Local\Temp\726cbd366559996da2b2d8f1dd10886d6f9d9acacdfdfe365dc08ac888161ca3N.exe
"C:\Users\Admin\AppData\Local\Temp\726cbd366559996da2b2d8f1dd10886d6f9d9acacdfdfe365dc08ac888161ca3N.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
- Suspicious use of WriteProcessMemory
PID:2272
- C:\Windows\splwow64.exe
  C:\Windows\splwow64.exe 12288
  2⤵
  PID:2488

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

Loading Replay Monitor...

Downloads

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

Filesize
175B

MD5
1130c911bf5db4b8f7cf9b6f4b457623

SHA1
48e734c4bc1a8b5399bff4954e54b268bde9d54c

SHA256
eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1

SHA512
94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

Download Submit
\Program Files\Common Files\System\symsrv.dll

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/2272-17-0x0000000000400000-0x0000000000B93000-memory.dmp

Filesize
7.6MB

Download
memory/2272-30-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2272-18-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2272-14-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2272-22-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2272-21-0x0000000000400000-0x0000000000B93000-memory.dmp

Filesize
7.6MB

Download
memory/2272-26-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2272-25-0x0000000000400000-0x0000000000B93000-memory.dmp

Filesize
7.6MB

Download
memory/2272-3-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2272-12-0x0000000000400000-0x0000000000B93000-memory.dmp

Filesize
7.6MB

Download
memory/2272-29-0x0000000000400000-0x0000000000B93000-memory.dmp

Filesize
7.6MB

Download
memory/2272-34-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2272-33-0x0000000000400000-0x0000000000B93000-memory.dmp

Filesize
7.6MB

Download
memory/2272-35-0x0000000000400000-0x0000000000B93000-memory.dmp

Filesize
7.6MB

Download
memory/2272-37-0x0000000000400000-0x0000000000B93000-memory.dmp

Filesize
7.6MB

Download
memory/2272-39-0x0000000000400000-0x0000000000B93000-memory.dmp

Filesize
7.6MB

Download
memory/2272-41-0x0000000000400000-0x0000000000B93000-memory.dmp

Filesize
7.6MB

Download
memory/2272-43-0x0000000000400000-0x0000000000B93000-memory.dmp

Filesize
7.6MB

Download

Analysis

Sharing