floxif | 29cfbcef98823aabf25d4bc612e9991ce971d7546f4d4660505eb75bbdc57eb8

Analysis

max time kernel
101s
max time network
104s
platform
windows11-21h2_x64
resource
win11-20250410-en
resource tags

arch:x64arch:x86image:win11-20250410-enlocale:en-usos:windows11-21h2-x64system
submitted
28/04/2025, 04:00

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General

Target
250428-eggedstly6.bin.exe
Size 2.5MB
Sample250428-eksltstnt3
SHA256 29cfbcef98823aabf25d4bc612e9991ce971d7546f4d4660505eb75bbdc57eb8
MD5 5bf53853d3cacbfea3b620ccf5e2c888
SHA1 e27e687f9e1acc259bc6c6291d65c8b775541cab
SHA512 3187976f5f3773bfe8f9fc8bfcfcb5319d13f84fd6cc08e91c26e6d6ce1abb2a42fe9d1f3449c1c99651a7efddc4ea67f21d9cd54980ab8acddd2be492d6f9d9
SSDEEP 49152:t9IIKxofs2hPd2l177BTK2VbDsar1YDjC:tWMfs2hPIl1/B
MD5 SHA1 SHA512 SSDEEP

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/0x002000000002ad75-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x002000000002ad75-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
5720	250428-eggedstly6.bin.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:	250428-eggedstly6.bin.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x002000000002ad75-1.dat	upx
behavioral2/memory/5720-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/5720-13-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	250428-eggedstly6.bin.exe

Program crash 3 IoCs

pid	pid_target	Process	procid_target
2672	5720	WerFault.exe	77
3412	5720	WerFault.exe	77
6024	5720	WerFault.exe	77

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	250428-eggedstly6.bin.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
5720	250428-eggedstly6.bin.exe
5720	250428-eggedstly6.bin.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5720	250428-eggedstly6.bin.exe

C:\Users\Admin\AppData\Local\Temp\250428-eggedstly6.bin.exe
"C:\Users\Admin\AppData\Local\Temp\250428-eggedstly6.bin.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
PID:5720
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5720 -s 840
  2⤵
  - Program crash
  PID:2672
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5720 -s 880
  2⤵
  - Program crash
  PID:3412
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5720 -s 984
  2⤵
  - Program crash
  PID:6024

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 5720 -ip 5720
1⤵
PID:4900

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 5720 -ip 5720
1⤵
PID:4104

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 5720 -ip 5720
1⤵
PID:1776

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

symsrv.dll

Path C:\Program Files\Common Files\System\symsrv.dll
Size 67KB
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab
SSDEEP 1536:YjV8y93KQpFQmPLRk7G50zy/riF12jvRyo0hQk7ZL:c8y93KQjy7G55riF1cMo03V
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/5720-4-0x0000000010000000-0x0000000010030000-memory.dmp

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memory/5720-6-0x0000000000DD1000-0x0000000000DD2000-memory.dmp

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memory/5720-13-0x0000000010000000-0x0000000010030000-memory.dmp

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memory/5720-11-0x0000000000DD0000-0x000000000103A000-memory.dmp

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