floxif | 201036c4387369e63c11a56571f6f540874a5605592db368431ab1e86be76bb2

General

Target

201036c4387369e63c11a56571f6f540874a5605592db368431ab1e86be76bb2N.dll
Size

1.5MB
MD5

29fe922e1390597ec7adb9182cb31670
SHA1

3610b4e0f739cc3f6f5a775f286e7c84c0450a97
SHA256

201036c4387369e63c11a56571f6f540874a5605592db368431ab1e86be76bb2
SHA512

3625f64c7272a758902eeb2c2f8f892fb6f434ed1f0b18229f1bc04c8619a332bd1796194264aaed4bf8028c2c5ab1ad6ff1e827d7e050902d02e390c30df788
SSDEEP

24576:naM84oHVJQgsGNbBNXjo2dj7MM1ebXh040Uf5GtaudomjI23yvNHm0L4+kMRGJ/s:aM84wL7U2pIM1KhcUf5Gt3db0b491qL

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
behavioral1/files/0x000a00000001225f-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x000a00000001225f-1.dat	acprotect

Executes dropped EXE 1 IoCs

pid	Process
2692	SohuNews.exe

Loads dropped DLL 1 IoCs

pid	Process
2396	rundll32.exe

Network Service Discovery 1 TTPs 1 IoCs

Attempt to gather information on host's network.

discovery

Network Service Discovery

T1046

pid	Process
2160	arp.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2396-3-0x0000000010000000-0x000000001048E000-memory.dmp	upx
behavioral1/files/0x000a00000001225f-1.dat	upx
behavioral1/memory/2396-4-0x0000000010000000-0x000000001048E000-memory.dmp	upx
behavioral1/memory/2396-6-0x0000000000180000-0x00000000001B3000-memory.dmp	upx
behavioral1/memory/2396-13-0x0000000000180000-0x00000000001B3000-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

System Location Discovery: System Language Discovery 1 TTPs 3 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	SohuNews.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	arp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2396	rundll32.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2568 wrote to memory of 2396	2568	rundll32.exe	30
PID 2568 wrote to memory of 2396	2568	rundll32.exe	30
PID 2568 wrote to memory of 2396	2568	rundll32.exe	30
PID 2568 wrote to memory of 2396	2568	rundll32.exe	30
PID 2568 wrote to memory of 2396	2568	rundll32.exe	30
PID 2568 wrote to memory of 2396	2568	rundll32.exe	30
PID 2568 wrote to memory of 2396	2568	rundll32.exe	30
PID 2396 wrote to memory of 2160	2396	rundll32.exe	31
PID 2396 wrote to memory of 2160	2396	rundll32.exe	31
PID 2396 wrote to memory of 2160	2396	rundll32.exe	31
PID 2396 wrote to memory of 2160	2396	rundll32.exe	31
PID 2396 wrote to memory of 2692	2396	rundll32.exe	33
PID 2396 wrote to memory of 2692	2396	rundll32.exe	33
PID 2396 wrote to memory of 2692	2396	rundll32.exe	33
PID 2396 wrote to memory of 2692	2396	rundll32.exe	33

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\201036c4387369e63c11a56571f6f540874a5605592db368431ab1e86be76bb2N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2568
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\201036c4387369e63c11a56571f6f540874a5605592db368431ab1e86be76bb2N.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:2396
- - C:\Windows\SysWOW64\arp.exe
    arp -a
    3⤵
    - Network Service Discovery
    - System Location Discovery: System Language Discovery
    PID:2160
- - C:\SohuNews.exe
    "\SohuNews.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2692

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

1

T1046

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\SohuNews.exe

Filesize
1.3MB

MD5
f274f54612c76678ef046aadfb5b8b76

SHA1
b2bff0df87d3a91ba6a09c19795acf477fe35dab

SHA256
50782c4757b41fd943a84b63cb8240b148bfdb48372fbc3bc8531cc870062928

SHA512
00d6201f6b78f95a6fb534f55e2f96676ffb11f64ba38308ca85bb03817bdc9198410f2d786baa8c3c96789a86e919284d8518e0229c352de6c632a0da94eae6

Download Submit
\Program Files\Common Files\System\symsrv.dll

Filesize
71KB

MD5
4fcd7574537cebec8e75b4e646996643

SHA1
efa59bb9050fb656b90d5d40c942fb2a304f2a8b

SHA256
8ea3b17e4b783ffc0bc387b81b823bf87af0d57da74541d88ba85314bb232a5d

SHA512
7f1a7ef64d332a735db82506b47d84853af870785066d29ccaf4fdeab114079a9f0db400e01ba574776a0d652a248658fe1e8f9659cdced19ad6eea09644ea3e

Download Submit
memory/2396-3-0x0000000010000000-0x000000001048E000-memory.dmp

Filesize
4.6MB

Download
memory/2396-4-0x0000000010000000-0x000000001048E000-memory.dmp

Filesize
4.6MB

Download
memory/2396-6-0x0000000000180000-0x00000000001B3000-memory.dmp

Filesize
204KB

Download
memory/2396-5-0x000000001048A000-0x000000001048B000-memory.dmp

Filesize
4KB

Download
memory/2396-13-0x0000000000180000-0x00000000001B3000-memory.dmp

Filesize
204KB

Download

Analysis

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