floxif | d860998288081411e8a33896354fd02bdb8093a887820d0308777cc466b1cd6e

General

Target
d860998288081411e8a33896354fd02bdb8093a887820d0308777cc466b1cd6e.exe
Size 2.7MB
Sample261002-jefsasxt3r
SHA256 d860998288081411e8a33896354fd02bdb8093a887820d0308777cc466b1cd6e
MD5 9e309d466aa98be6b7359acae31daaa1
SHA1 9b0dbf2f60fe96c6d95fa196b627a45b2b666c02
SHA512 6d5e406a9bf02296a9725d7ec1e4f5dbf6d2196870e6e9124d46e983b24a52c2d092579ea66a767cfb47a4623b653d4f8bde064a20a736d762f06c97ae6187f2
SSDEEP 49152:2Pf6VdMQTMRbg23shkNw//7vgseqziRS1UsrzoeNFZee5c71y9Bx4M3W/KMZKWKg:2q0Rz3ssw//7vgVqziRS1Usrzpp95y15
TLSH
T1BED58D217A51C076C173253095AEE378E1F9BD30493942376291BF3D6EB4A42EA3877B
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor discovery floxif persistence privilege_escalation trojan upx

Malware Config

Signatures

Family: 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/0x000f00000001b8ac-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
behavioral2/files/0x000f00000001b8ac-1.dat	acprotect

Loads dropped DLL 5 IoCs

pid	Process
4216	d860998288081411e8a33896354fd02bdb8093a887820d0308777cc466b1cd6e.exe
3196	WerFault.exe
3636	WerFault.exe
3224	WerFault.exe
4604	WerFault.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)	\??\d:	d860998288081411e8a33896354fd02bdb8093a887820d0308777cc466b1cd6e.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000f00000001b8ac-1.dat	upx
behavioral2/memory/4216-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4216-17-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	d860998288081411e8a33896354fd02bdb8093a887820d0308777cc466b1cd6e.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3636	4216	WerFault.exe	88
4604	4216	WerFault.exe	88

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	d860998288081411e8a33896354fd02bdb8093a887820d0308777cc466b1cd6e.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	d860998288081411e8a33896354fd02bdb8093a887820d0308777cc466b1cd6e.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	d860998288081411e8a33896354fd02bdb8093a887820d0308777cc466b1cd6e.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4216	d860998288081411e8a33896354fd02bdb8093a887820d0308777cc466b1cd6e.exe
4216	d860998288081411e8a33896354fd02bdb8093a887820d0308777cc466b1cd6e.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4216	d860998288081411e8a33896354fd02bdb8093a887820d0308777cc466b1cd6e.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4216	d860998288081411e8a33896354fd02bdb8093a887820d0308777cc466b1cd6e.exe

C:\Users\Admin\AppData\Local\Temp\d860998288081411e8a33896354fd02bdb8093a887820d0308777cc466b1cd6e.exe
"C:\Users\Admin\AppData\Local\Temp\d860998288081411e8a33896354fd02bdb8093a887820d0308777cc466b1cd6e.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Drops file in Program Files directory
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:4216
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4216 -s 928
  2⤵
  - Loads dropped DLL
  - Program crash
  PID:3636
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4216 -s 1548
  2⤵
  - Loads dropped DLL
  - Program crash
  PID:4604

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4216 -ip 4216
1⤵
- Loads dropped DLL
PID:3196

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 604 -p 4216 -ip 4216
1⤵
- Loads dropped DLL
PID:3224

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

Privilege Escalation

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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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
TLSH
T17863F1372AB5807DDD210D37949F835AB771E5A76C20643FC25907D988B8DD0E3239AE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4216-4-0x0000000010000000-0x0000000010030000-memory.dmp

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memory/4216-10-0x0000000000681000-0x0000000000682000-memory.dmp

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memory/4216-17-0x0000000010000000-0x0000000010030000-memory.dmp

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memory/4216-15-0x0000000000680000-0x0000000000928000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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