floxif | 4e273f6d3be428836ea3a2a4d2428885b897736a39445284dd444060ed96b303

General

Target

4e273f6d3be428836ea3a2a4d2428885b897736a39445284dd444060ed96b303N.exe
Size

661KB
MD5

7ee6f3e2b9f3494a80d9fb5e6996a990
SHA1

1c4dd34854daefb5c55d1bd7d51dd226b698d8c6
SHA256

4e273f6d3be428836ea3a2a4d2428885b897736a39445284dd444060ed96b303
SHA512

cef3892c0b2a412fd198a4f99192ee4b2c8494db487387130ebf6e8c5a3744e010b9dc0a092781f10398885314f2550dce8a13fc867cdbd7d38459a2c7b25a54
SSDEEP

12288:Vh14kMN0TnvjcrhU8KNu0IfTDZIeW71cPtNlk24ZquPYh7EXHBjvrEH7Uu:Oki0TrcrhGIhW71cTlWkqYhQ1rEH7L

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/0x000a000000023bbd-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000a000000023bbd-1.dat	acprotect

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	4e273f6d3be428836ea3a2a4d2428885b897736a39445284dd444060ed96b303N.exe

Executes dropped EXE 1 IoCs

pid	Process
3852	dmdskres.exe

Loads dropped DLL 2 IoCs

pid	Process
4200	4e273f6d3be428836ea3a2a4d2428885b897736a39445284dd444060ed96b303N.exe
3852	dmdskres.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:	4e273f6d3be428836ea3a2a4d2428885b897736a39445284dd444060ed96b303N.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000a000000023bbd-1.dat	upx
behavioral2/memory/4200-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4200-47-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	4e273f6d3be428836ea3a2a4d2428885b897736a39445284dd444060ed96b303N.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4984	3852	WerFault.exe	87

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	4e273f6d3be428836ea3a2a4d2428885b897736a39445284dd444060ed96b303N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dmdskres.exe

NSIS installer 2 IoCs

installer

resource	yara_rule
behavioral2/files/0x0006000000023080-37.dat	nsis_installer_1
behavioral2/files/0x0006000000023080-37.dat	nsis_installer_2

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
4200	4e273f6d3be428836ea3a2a4d2428885b897736a39445284dd444060ed96b303N.exe
4200	4e273f6d3be428836ea3a2a4d2428885b897736a39445284dd444060ed96b303N.exe
4200	4e273f6d3be428836ea3a2a4d2428885b897736a39445284dd444060ed96b303N.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4200	4e273f6d3be428836ea3a2a4d2428885b897736a39445284dd444060ed96b303N.exe
Token: SeDebugPrivilege	4200	4e273f6d3be428836ea3a2a4d2428885b897736a39445284dd444060ed96b303N.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4200 wrote to memory of 3852	4200	4e273f6d3be428836ea3a2a4d2428885b897736a39445284dd444060ed96b303N.exe	87
PID 4200 wrote to memory of 3852	4200	4e273f6d3be428836ea3a2a4d2428885b897736a39445284dd444060ed96b303N.exe	87
PID 4200 wrote to memory of 3852	4200	4e273f6d3be428836ea3a2a4d2428885b897736a39445284dd444060ed96b303N.exe	87
PID 3852 wrote to memory of 3844	3852	dmdskres.exe	88
PID 3852 wrote to memory of 3844	3852	dmdskres.exe	88
PID 3852 wrote to memory of 3844	3852	dmdskres.exe	88

C:\Users\Admin\AppData\Local\Temp\4e273f6d3be428836ea3a2a4d2428885b897736a39445284dd444060ed96b303N.exe
"C:\Users\Admin\AppData\Local\Temp\4e273f6d3be428836ea3a2a4d2428885b897736a39445284dd444060ed96b303N.exe"
1⤵
- Checks computer location settings
- 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
- Suspicious use of WriteProcessMemory
PID:4200
- C:\Users\Admin\AppData\Local\Temp\dmdskres.exe
  "C:\Users\Admin\AppData\Local\Temp\dmdskres.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3852
- - C:\Users\Admin\AppData\Local\Temp\dmdskres.exe
    "C:\Users\Admin\AppData\Local\Temp\dmdskres.exe"
    3⤵
    PID:3844
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3852 -s 932
    3⤵
    - Program crash
    PID:4984

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3852 -ip 3852
1⤵
PID:1348

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

3

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
C:\Users\Admin\AppData\Local\Temp\dmdskres.exe

Filesize
303KB

MD5
92fc2ab00274d476e29150f64af19946

SHA1
4cf79801c61f64f01d6586016615858844c77af9

SHA256
c412523b1ebcfbeb85bd4e20319cb17271ecfeac9d5012d44e9f90a152cb63fd

SHA512
3285f9371bcd29cc5602ab6a7587c806ee78b7ff320189f5608fc12928d884437dd440d705f408a81f8cd750fc722ac21041c467fa8dbf22128ab1f5855cf3a5

Download Submit
C:\Users\Admin\AppData\Local\Temp\nskB894.tmp\System.dll

Filesize
11KB

MD5
3f176d1ee13b0d7d6bd92e1c7a0b9bae

SHA1
fe582246792774c2c9dd15639ffa0aca90d6fd0b

SHA256
fa4ab1d6f79fd677433a31ada7806373a789d34328da46ccb0449bbf347bd73e

SHA512
0a69124819b7568d0dea4e9e85ce8fe61c7ba697c934e3a95e2dcfb9f252b1d9da7faf8774b6e8efd614885507acc94987733eba09a2f5e7098b774dfc8524b6

Download Submit
memory/3852-56-0x0000000000400000-0x0000000000451000-memory.dmp

Filesize
324KB

Download
memory/4200-25-0x0000000005200000-0x000000000526C000-memory.dmp

Filesize
432KB

Download
memory/4200-18-0x0000000005200000-0x000000000526C000-memory.dmp

Filesize
432KB

Download
memory/4200-10-0x0000000005200000-0x0000000005274000-memory.dmp

Filesize
464KB

Download
memory/4200-12-0x0000000005200000-0x000000000526C000-memory.dmp

Filesize
432KB

Download
memory/4200-28-0x0000000005200000-0x000000000526C000-memory.dmp

Filesize
432KB

Download
memory/4200-26-0x0000000005200000-0x000000000526C000-memory.dmp

Filesize
432KB

Download
memory/4200-8-0x0000000002F40000-0x0000000002FB4000-memory.dmp

Filesize
464KB

Download
memory/4200-22-0x0000000005200000-0x000000000526C000-memory.dmp

Filesize
432KB

Download
memory/4200-20-0x0000000005200000-0x000000000526C000-memory.dmp

Filesize
432KB

Download
memory/4200-9-0x0000000005360000-0x0000000005904000-memory.dmp

Filesize
5.6MB

Download
memory/4200-16-0x0000000005200000-0x000000000526C000-memory.dmp

Filesize
432KB

Download
memory/4200-14-0x0000000005200000-0x000000000526C000-memory.dmp

Filesize
432KB

Download
memory/4200-11-0x0000000005200000-0x000000000526C000-memory.dmp

Filesize
432KB

Download
memory/4200-7-0x0000000000400000-0x0000000000495000-memory.dmp

Filesize
596KB

Download
memory/4200-48-0x0000000000400000-0x0000000000495000-memory.dmp

Filesize
596KB

Download
memory/4200-47-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4200-6-0x0000000000415000-0x0000000000418000-memory.dmp

Filesize
12KB

Download
memory/4200-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads