floxif | c1e9e6104a9d8378b2babf2bcfd153bbad19189a97eeeb51f18f565e802dadb5

Analysis

max time kernel
141s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
15/09/2024, 01:27

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General

Target
c1e9e6104a9d8378b2babf2bcfd153bbad19189a97eeeb51f18f565e802dadb5.dll
Size 158KB
Sample240915-bt91paycrc
SHA256 c1e9e6104a9d8378b2babf2bcfd153bbad19189a97eeeb51f18f565e802dadb5
MD5 a4ba539a8c345e0c90ed679eac124e49
SHA1 46eeda32d453f75432f1f79cec24e9d152058ab7
SHA512 f805ef19519fbe5c8c1c3a9c9d2f5ded67ba6a08930e5dabafd8bccd9078e182823de125e956e9bec3fa651c62fc6a86514d80b6ba333754215a24925e51152a
SSDEEP 3072:0lzDRjhU676gVhx+pecbiya82lQBV+UdE+rECWp7hKMSjxVD:0jh9Bh+ecbiQBV+UdvrEFp7hKMSjrD
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

floxif backdoor discovery trojan upx

Malware Config

Signatures

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/0x000b000000012259-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x000b000000012259-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
2720	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000b000000012259-1.dat	upx
behavioral1/memory/2720-3-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2720-7-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2688	2720	WerFault.exe	31

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	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2720	rundll32.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2768 wrote to memory of 2720	2768	rundll32.exe	31
PID 2768 wrote to memory of 2720	2768	rundll32.exe	31
PID 2768 wrote to memory of 2720	2768	rundll32.exe	31
PID 2768 wrote to memory of 2720	2768	rundll32.exe	31
PID 2768 wrote to memory of 2720	2768	rundll32.exe	31
PID 2768 wrote to memory of 2720	2768	rundll32.exe	31
PID 2768 wrote to memory of 2720	2768	rundll32.exe	31
PID 2720 wrote to memory of 2688	2720	rundll32.exe	32
PID 2720 wrote to memory of 2688	2720	rundll32.exe	32
PID 2720 wrote to memory of 2688	2720	rundll32.exe	32
PID 2720 wrote to memory of 2688	2720	rundll32.exe	32

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c1e9e6104a9d8378b2babf2bcfd153bbad19189a97eeeb51f18f565e802dadb5.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2768
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c1e9e6104a9d8378b2babf2bcfd153bbad19189a97eeeb51f18f565e802dadb5.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2720
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2720 -s 328
    3⤵
    - Program crash
    PID:2688

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

symsrv.dll

Path \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

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memory/2720-3-0x0000000010000000-0x0000000010030000-memory.dmp

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memory/2720-5-0x0000000074560000-0x0000000074574000-memory.dmp

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memory/2720-7-0x0000000010000000-0x0000000010030000-memory.dmp

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Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads