floxif | ff531d71f5d53b01695fba9ab7b95a9884947d49faeec07b8724e1a37351eba8

General

Target

ff531d71f5d53b01695fba9ab7b95a9884947d49faeec07b8724e1a37351eba8.exe
Size

2.3MB
MD5

66c1d26d55bfdaa4483f599cee302959
SHA1

8b8ce8d039b57073bc68cdc2bc91aea2febf097c
SHA256

ff531d71f5d53b01695fba9ab7b95a9884947d49faeec07b8724e1a37351eba8
SHA512

43f8e1d569cd42966df7dc00fce044009b7008fb920f254c2764c5fa988934e6570dee4a71c320731739120a9bae44a05a8022ed26d411f0c0b6803c262d62be
SSDEEP

49152:V0dRSt4+iCJSmPI/6qGlbT4fmRJ4y9dY7:VhSmPI+lAK9dw

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/0x0033000000023d04-2.dat	floxif

Downloads MZ/PE file 1 IoCs

flow	pid	Process
49	4260	Process not Found

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Drivers\AsrDrv202.sys	ff531d71f5d53b01695fba9ab7b95a9884947d49faeec07b8724e1a37351eba8.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0033000000023d04-2.dat	acprotect

Loads dropped DLL 4 IoCs

pid	Process
4740	ff531d71f5d53b01695fba9ab7b95a9884947d49faeec07b8724e1a37351eba8.exe
4740	ff531d71f5d53b01695fba9ab7b95a9884947d49faeec07b8724e1a37351eba8.exe
5100	Process not Found
4908	MicrosoftEdgeUpdate.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:	ff531d71f5d53b01695fba9ab7b95a9884947d49faeec07b8724e1a37351eba8.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4740-5-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/files/0x0033000000023d04-2.dat	upx
behavioral2/memory/4740-18-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4740-19-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4740-22-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Microsoft\EdgeUpdate\1.3.195.43\msedgeupdate.dll	ff531d71f5d53b01695fba9ab7b95a9884947d49faeec07b8724e1a37351eba8.exe
File created	C:\Program Files (x86)\Microsoft\EdgeUpdate\1.3.195.43\msedgeupdate.dll.tmp	ff531d71f5d53b01695fba9ab7b95a9884947d49faeec07b8724e1a37351eba8.exe
File opened for modification	C:\Program Files (x86)\Microsoft\EdgeUpdate\1.3.195.43\msedgeupdate.dll.dat	ff531d71f5d53b01695fba9ab7b95a9884947d49faeec07b8724e1a37351eba8.exe
File created	C:\Program Files\Common Files\System\symsrv.dll	ff531d71f5d53b01695fba9ab7b95a9884947d49faeec07b8724e1a37351eba8.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3312	5100	WerFault.exe	92
968	4908	WerFault.exe	96

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	ff531d71f5d53b01695fba9ab7b95a9884947d49faeec07b8724e1a37351eba8.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
4908	MicrosoftEdgeUpdate.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4740	ff531d71f5d53b01695fba9ab7b95a9884947d49faeec07b8724e1a37351eba8.exe
4740	ff531d71f5d53b01695fba9ab7b95a9884947d49faeec07b8724e1a37351eba8.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
664	Process not Found

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4740	ff531d71f5d53b01695fba9ab7b95a9884947d49faeec07b8724e1a37351eba8.exe

C:\Users\Admin\AppData\Local\Temp\ff531d71f5d53b01695fba9ab7b95a9884947d49faeec07b8724e1a37351eba8.exe
"C:\Users\Admin\AppData\Local\Temp\ff531d71f5d53b01695fba9ab7b95a9884947d49faeec07b8724e1a37351eba8.exe"
1⤵
- Drops file in Drivers directory
- 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:4740

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 368 -p 5100 -ip 5100
1⤵
PID:1740

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 5100 -s 520
1⤵
- Program crash
PID:3312

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSIxIiBpbnN0YWxsZGF0ZXRpbWU9IjE3Mzg5NDY4ODkiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4MzQxOTM2NTgwOTAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI1NDU3NDA2MzE0Ii8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:4908
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4908 -s 520
  2⤵
  - Program crash
  PID:968

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 4908 -ip 4908
1⤵
PID:1828

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

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\Microsoft\EdgeUpdate\1.3.195.43\msedgeupdate.dll.tmp

Filesize
2.2MB

MD5
237d9e34572b8323d1b66652323c0b3a

SHA1
767df77674f7a00e466dde6560c6624b49a4d162

SHA256
b732de0164990473cf244abb1e34276b6472af5c98938b8fc5fbcbd0f063fc12

SHA512
17ad221aa038e65b58df4e93dbadf156d295b9b984faa87b622b2824142ed4b9343b549381a45e8ed87195c423f8c7ac99cdc8cb6c57f1703032b5fa08460210

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

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/4740-0-0x0000000000400000-0x000000000064E000-memory.dmp

Filesize
2.3MB

Download
memory/4740-5-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4740-18-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4740-19-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4740-17-0x0000000000400000-0x000000000064E000-memory.dmp

Filesize
2.3MB

Download
memory/4740-22-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4740-20-0x0000000000400000-0x000000000064E000-memory.dmp

Filesize
2.3MB

Download

Analysis

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