floxif | 3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec

General

Target

3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
Size

634KB
MD5

11836f2a37268ad5633a2df827b5f997
SHA1

b6177f96597c679f584888452355c793f81a8cea
SHA256

3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec
SHA512

6c1b79be05fce9098b9698187f53e93e027220f59c1a6e91d33d9a9c94b0a635013fa2444752b7873a7a6e2a328436a6eb23174ddcc0e420809056eb59e5d47e
SSDEEP

12288:sYV6MorX7qzuC3QHO9FQVHPF55sgcEijjWURv9TjCJejQAGM5DBjvrEH7cyt:LBXu9HGaV+hjjWiZfFGM5ZrEH75t

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/0x000d000000023cd8-2.dat	floxif

Downloads MZ/PE file 1 IoCs

flow	pid	Process
35	1688	Process not Found

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000d000000023cd8-2.dat	acprotect

Loads dropped DLL 4 IoCs

pid	Process
4852	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
4852	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
3060	Process not Found
4012	MicrosoftEdgeUpdate.exe

Enumerates connected drives 3 TTPs 23 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)	\??\m:	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File opened (read-only)	\??\p:	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File opened (read-only)	\??\q:	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File opened (read-only)	\??\u:	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File opened (read-only)	\??\j:	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File opened (read-only)	\??\i:	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File opened (read-only)	\??\k:	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File opened (read-only)	\??\l:	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File opened (read-only)	\??\s:	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File opened (read-only)	\??\t:	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File opened (read-only)	\??\w:	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File opened (read-only)	\??\x:	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File opened (read-only)	\??\g:	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File opened (read-only)	\??\z:	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File opened (read-only)	\??\y:	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File opened (read-only)	\??\e:	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File opened (read-only)	\??\h:	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File opened (read-only)	\??\n:	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File opened (read-only)	\??\o:	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File opened (read-only)	\??\r:	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File opened (read-only)	\??\v:	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File opened (read-only)	\??\a:	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File opened (read-only)	\??\b:	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe

AutoIT Executable 2 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/4852-20-0x0000000000230000-0x0000000000373000-memory.dmp	autoit_exe
behavioral2/memory/4852-21-0x0000000000230000-0x0000000000373000-memory.dmp	autoit_exe

UPX packed file 16 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4852-0-0x0000000000230000-0x0000000000373000-memory.dmp	upx
behavioral2/files/0x000d000000023cd8-2.dat	upx
behavioral2/memory/4852-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4852-20-0x0000000000230000-0x0000000000373000-memory.dmp	upx
behavioral2/memory/4852-21-0x0000000000230000-0x0000000000373000-memory.dmp	upx
behavioral2/memory/4852-22-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4852-24-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4852-29-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4852-33-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4852-37-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4852-41-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4852-45-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4852-49-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4852-53-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4852-57-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4852-63-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Microsoft\EdgeUpdate\1.3.195.43\msedgeupdate.dll.dat	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File created	\??\c:\program files\common files\system\symsrv.dll.000	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File created	C:\Program Files\Common Files\System\symsrv.dll	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File opened for modification	C:\Program Files (x86)\Microsoft\EdgeUpdate\1.3.195.43\msedgeupdate.dll	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
File created	C:\Program Files (x86)\Microsoft\EdgeUpdate\1.3.195.43\msedgeupdate.dll.tmp	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4408	3060	WerFault.exe	89
716	4012	WerFault.exe	93

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	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.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
4012	MicrosoftEdgeUpdate.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4852	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
4852	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
4852	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
4852	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
4852	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
4852	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4852	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4852	3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe

C:\Users\Admin\AppData\Local\Temp\3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe
"C:\Users\Admin\AppData\Local\Temp\3bd72b0ae3af728e35de15584facab45ea21a6d74f2b38726c5050312667aeec.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:4852

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3060 -ip 3060
1⤵
PID:2192

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3060 -s 520
1⤵
- Program crash
PID:4408

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSIxIiBpbnN0YWxsZGF0ZXRpbWU9IjE3Mzg5NDY4MzAiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4MzQxOTE0Njg3NjAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI0Nzg2NTY0ODQyIi8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:4012
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4012 -s 520
  2⤵
  - Program crash
  PID:716

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 4012 -ip 4012
1⤵
PID:5016

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
8cf47dcf906d480df43f737320786689

SHA1
66dc75bb9e09f022b239b274d5ae1c16b34f5e94

SHA256
1f934d930a8f6332e2db2adfcfc34af92be53b4936c66625175606d3bc19cc0b

SHA512
a85a4dadee7db0e3b9d4831f7e8f288ae10089f267762512efc3995533204a202aed99068c89a5eb54efdf8b60e1b5c0ee23907ba5597306ff209dea14516b74

Download Submit
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/4852-24-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4852-33-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4852-20-0x0000000000230000-0x0000000000373000-memory.dmp

Filesize
1.3MB

Download
memory/4852-21-0x0000000000230000-0x0000000000373000-memory.dmp

Filesize
1.3MB

Download
memory/4852-22-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4852-0-0x0000000000230000-0x0000000000373000-memory.dmp

Filesize
1.3MB

Download
memory/4852-29-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4852-6-0x000000000033D000-0x000000000033E000-memory.dmp

Filesize
4KB

Download
memory/4852-37-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4852-41-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4852-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4852-45-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4852-49-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4852-53-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4852-57-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4852-63-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download

Analysis

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