floxif | f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818

Analysis

max time kernel
146s
max time network
61s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
18-02-2025 08:22

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General

Target

f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Size

201KB
MD5

5413c431c8d3fd58740a7e72ff7e7198
SHA1

e3a0c4ccaec82caa0a3d809c641797638e65acb8
SHA256

f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818
SHA512

c0243f5d407877bdff40f91cbc03b76d0f890292d24c3ee408214d0bebf354d44f6b458a6bcbd501d4c59d17f9c6bfbe3cf9eea1c830eee6ea89f13b603cdc6f
SSDEEP

6144:LnpE/c98fkmuRr+eI8BV+UdvrEFp7hKjlM:f8cmuRrdI8BjvrEH7cM

Score

10^/10

floxif backdoor discovery persistence privilege_escalation 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/0x000c000000012264-1.dat	floxif

Event Triggered Execution: AppInit DLLs 1 TTPs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
persistence privilege_escalation

AppInit DLLs
T1546.010

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x000c000000012264-1.dat	acprotect

Loads dropped DLL 2 IoCs

pid	Process
2304	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
2860	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.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:	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe

UPX packed file 11 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2304-3-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/files/0x000c000000012264-1.dat	upx
behavioral1/memory/2860-7-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2304-9-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2860-12-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2860-13-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2860-17-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2860-21-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2860-25-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2860-29-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2860-33-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
File created	\??\c:\program files\common files\system\symsrv.dll.000	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe

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	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe

Modifies data under HKEY_USERS 28 IoCs

description	ioc	Process
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\4a-b7-f4-6e-a0-dc\WpadDecisionTime = 202dba47de81db01	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0"	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\4a-b7-f4-6e-a0-dc\WpadDetectedUrl	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000004000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f007f000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C1F645C0-ADDC-470E-82A3-D6017383E5F8}\WpadNetworkName = "Network 3"	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C1F645C0-ADDC-470E-82A3-D6017383E5F8}\WpadDecisionTime = 404d6250de81db01	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\4a-b7-f4-6e-a0-dc\WpadDecisionTime = 404d6250de81db01	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\4a-b7-f4-6e-a0-dc\WpadDecision = "0"	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C1F645C0-ADDC-470E-82A3-D6017383E5F8}\WpadDecision = "0"	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f007f000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C1F645C0-ADDC-470E-82A3-D6017383E5F8}\WpadDecisionTime = 202dba47de81db01	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\4a-b7-f4-6e-a0-dc	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C1F645C0-ADDC-470E-82A3-D6017383E5F8}\4a-b7-f4-6e-a0-dc	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\4a-b7-f4-6e-a0-dc\WpadDecisionReason = "1"	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C1F645C0-ADDC-470E-82A3-D6017383E5F8}	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C1F645C0-ADDC-470E-82A3-D6017383E5F8}\WpadDecisionReason = "1"	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2860	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
2860	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
2860	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2304	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
Token: SeDebugPrivilege	2860	f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe

C:\Users\Admin\AppData\Local\Temp\f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
"C:\Users\Admin\AppData\Local\Temp\f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe"
1⤵
- Loads dropped DLL
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2304

C:\Users\Admin\AppData\Local\Temp\f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
C:\Users\Admin\AppData\Local\Temp\f9cb8d2b57e0b2901e9fb30d07c484cb190028d5c97af0a2d360eabe74987818.exe
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Drops file in System32 directory
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2860

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

Privilege Escalation

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

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

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/2304-3-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2304-8-0x0000000000C60000-0x0000000000C87000-memory.dmp

Filesize
156KB

Download
memory/2304-9-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2860-12-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2860-11-0x0000000000C60000-0x0000000000C87000-memory.dmp

Filesize
156KB

Download
memory/2860-13-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2860-17-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2860-21-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2860-25-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2860-7-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2860-29-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2860-33-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download