floxif | e6e9923edcb92aa5b4194e670f94af1435b5ede9eb7c4fc2604e56481a4b9744

General

Target

880f61558c6a2404be982ba625c56390N.exe
Size

443KB
MD5

880f61558c6a2404be982ba625c56390
SHA1

ee53795ceae1cfc9be2f56693b628ebed43df96e
SHA256

e6e9923edcb92aa5b4194e670f94af1435b5ede9eb7c4fc2604e56481a4b9744
SHA512

cbc1e9eacd14adc1e4d1c421abdaa4042afcbb166888b99912402a4afe825e928efc9b3bf181de3412b43cbf1b983f01c0ce1cd7760b6d3d944b43e0e327147f
SSDEEP

12288:AtbTE1rkt826L4xd1Ei05t6empQ+uK+JApHJBjvrEH7r:At818EiKTmp2oHXrEH7r

Score

10^/10

floxif mylobot backdoor botnet discovery persistence trojan upx

Malware Config

Extracted

Family

mylobot

C2

onthestage.ru:6521

krebson.ru:4685

stanislasarnoud.ru:5739

Signatures

Floxif, Floodfix
Floxif aka FloodFix is a file-changing trojan and backdoor written in C++.
backdoor trojan floxif
Mylobot
Botnet which first appeared in 2017 written in C++.
botnet mylobot

Detects Floxif payload 1 IoCs

backdoor

Processes:

resource	yara_rule
C:\Program Files\Common Files\System\symsrv.dll	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

Processes:

resource	yara_rule
C:\Program Files\Common Files\System\symsrv.dll	acprotect

Executes dropped EXE 2 IoCs

Processes:

usrutcup.exeusrutcup.exe

pid process

1556 usrutcup.exe
1676 usrutcup.exe
Loads dropped DLL 2 IoCs

Processes:

880f61558c6a2404be982ba625c56390N.exeusrutcup.exe

pid process

784 880f61558c6a2404be982ba625c56390N.exe
1556 usrutcup.exe

pid	process
1556	usrutcup.exe
1676	usrutcup.exe

pid	process
784	880f61558c6a2404be982ba625c56390N.exe
1556	usrutcup.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
C:\Program Files\Common Files\System\symsrv.dll	upx
behavioral2/memory/784-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/1556-24-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/784-29-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/1556-56-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

cmd.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\qryct = "C:\\Users\\Admin\\AppData\\Roaming\\uaurquuy\\usrutcup.exe"	cmd.exe

Enumerates connected drives 3 TTPs 2 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

Processes:

880f61558c6a2404be982ba625c56390N.exeusrutcup.exe

description ioc process

File opened (read-only) \??\e: 880f61558c6a2404be982ba625c56390N.exe
File opened (read-only) \??\e: usrutcup.exe

description	ioc	process
File opened (read-only)	\??\e:	880f61558c6a2404be982ba625c56390N.exe
File opened (read-only)	\??\e:	usrutcup.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

880f61558c6a2404be982ba625c56390N.exeusrutcup.exe

description	pid	process	target process
PID 784 set thread context of 4980	784	880f61558c6a2404be982ba625c56390N.exe	880f61558c6a2404be982ba625c56390N.exe
PID 1556 set thread context of 1676	1556	usrutcup.exe	usrutcup.exe

Drops file in Program Files directory 3 IoCs

Processes:

880f61558c6a2404be982ba625c56390N.exeusrutcup.exe

description	ioc	process
File created	C:\Program Files\Common Files\System\symsrv.dll	880f61558c6a2404be982ba625c56390N.exe
File created	\??\c:\program files\common files\system\symsrv.dll.000	880f61558c6a2404be982ba625c56390N.exe
File created	\??\c:\program files\common files\system\symsrv.dll.000	usrutcup.exe

System Location Discovery: System Language Discovery 1 TTPs 6 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

Processes:

notepad.exe880f61558c6a2404be982ba625c56390N.exe880f61558c6a2404be982ba625c56390N.exeusrutcup.exeusrutcup.execmd.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	880f61558c6a2404be982ba625c56390N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	880f61558c6a2404be982ba625c56390N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	usrutcup.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	usrutcup.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

880f61558c6a2404be982ba625c56390N.exeusrutcup.exe

pid process

784 880f61558c6a2404be982ba625c56390N.exe
784 880f61558c6a2404be982ba625c56390N.exe
1556 usrutcup.exe
1556 usrutcup.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

880f61558c6a2404be982ba625c56390N.exeusrutcup.exe

description pid process

Token: SeDebugPrivilege 784 880f61558c6a2404be982ba625c56390N.exe
Token: SeDebugPrivilege 1556 usrutcup.exe

pid	process
784	880f61558c6a2404be982ba625c56390N.exe
784	880f61558c6a2404be982ba625c56390N.exe
1556	usrutcup.exe
1556	usrutcup.exe

description	pid	process
Token: SeDebugPrivilege	784	880f61558c6a2404be982ba625c56390N.exe
Token: SeDebugPrivilege	1556	usrutcup.exe

Suspicious use of WriteProcessMemory 37 IoCs

Processes:

880f61558c6a2404be982ba625c56390N.exe880f61558c6a2404be982ba625c56390N.exeusrutcup.exeusrutcup.execmd.exe

description	pid	process	target process
PID 784 wrote to memory of 4980	784	880f61558c6a2404be982ba625c56390N.exe	880f61558c6a2404be982ba625c56390N.exe
PID 784 wrote to memory of 4980	784	880f61558c6a2404be982ba625c56390N.exe	880f61558c6a2404be982ba625c56390N.exe
PID 784 wrote to memory of 4980	784	880f61558c6a2404be982ba625c56390N.exe	880f61558c6a2404be982ba625c56390N.exe
PID 784 wrote to memory of 4980	784	880f61558c6a2404be982ba625c56390N.exe	880f61558c6a2404be982ba625c56390N.exe
PID 784 wrote to memory of 4980	784	880f61558c6a2404be982ba625c56390N.exe	880f61558c6a2404be982ba625c56390N.exe
PID 784 wrote to memory of 4980	784	880f61558c6a2404be982ba625c56390N.exe	880f61558c6a2404be982ba625c56390N.exe
PID 784 wrote to memory of 4980	784	880f61558c6a2404be982ba625c56390N.exe	880f61558c6a2404be982ba625c56390N.exe
PID 784 wrote to memory of 4980	784	880f61558c6a2404be982ba625c56390N.exe	880f61558c6a2404be982ba625c56390N.exe
PID 784 wrote to memory of 4980	784	880f61558c6a2404be982ba625c56390N.exe	880f61558c6a2404be982ba625c56390N.exe
PID 784 wrote to memory of 4980	784	880f61558c6a2404be982ba625c56390N.exe	880f61558c6a2404be982ba625c56390N.exe
PID 4980 wrote to memory of 1556	4980	880f61558c6a2404be982ba625c56390N.exe	usrutcup.exe
PID 4980 wrote to memory of 1556	4980	880f61558c6a2404be982ba625c56390N.exe	usrutcup.exe
PID 4980 wrote to memory of 1556	4980	880f61558c6a2404be982ba625c56390N.exe	usrutcup.exe
PID 1556 wrote to memory of 1676	1556	usrutcup.exe	usrutcup.exe
PID 1556 wrote to memory of 1676	1556	usrutcup.exe	usrutcup.exe
PID 1556 wrote to memory of 1676	1556	usrutcup.exe	usrutcup.exe
PID 1556 wrote to memory of 1676	1556	usrutcup.exe	usrutcup.exe
PID 1556 wrote to memory of 1676	1556	usrutcup.exe	usrutcup.exe
PID 1556 wrote to memory of 1676	1556	usrutcup.exe	usrutcup.exe
PID 1556 wrote to memory of 1676	1556	usrutcup.exe	usrutcup.exe
PID 1556 wrote to memory of 1676	1556	usrutcup.exe	usrutcup.exe
PID 1556 wrote to memory of 1676	1556	usrutcup.exe	usrutcup.exe
PID 1556 wrote to memory of 1676	1556	usrutcup.exe	usrutcup.exe
PID 1676 wrote to memory of 2392	1676	usrutcup.exe	cmd.exe
PID 1676 wrote to memory of 2392	1676	usrutcup.exe	cmd.exe
PID 1676 wrote to memory of 2392	1676	usrutcup.exe	cmd.exe
PID 1676 wrote to memory of 2392	1676	usrutcup.exe	cmd.exe
PID 1676 wrote to memory of 2392	1676	usrutcup.exe	cmd.exe
PID 1676 wrote to memory of 2392	1676	usrutcup.exe	cmd.exe
PID 1676 wrote to memory of 2392	1676	usrutcup.exe	cmd.exe
PID 2392 wrote to memory of 3168	2392	cmd.exe	notepad.exe
PID 2392 wrote to memory of 3168	2392	cmd.exe	notepad.exe
PID 2392 wrote to memory of 3168	2392	cmd.exe	notepad.exe
PID 2392 wrote to memory of 3168	2392	cmd.exe	notepad.exe
PID 2392 wrote to memory of 3168	2392	cmd.exe	notepad.exe
PID 2392 wrote to memory of 3168	2392	cmd.exe	notepad.exe
PID 2392 wrote to memory of 3168	2392	cmd.exe	notepad.exe

C:\Users\Admin\AppData\Local\Temp\880f61558c6a2404be982ba625c56390N.exe
"C:\Users\Admin\AppData\Local\Temp\880f61558c6a2404be982ba625c56390N.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:784
- C:\Users\Admin\AppData\Local\Temp\880f61558c6a2404be982ba625c56390N.exe
  "C:\Users\Admin\AppData\Local\Temp\880f61558c6a2404be982ba625c56390N.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4980
- - C:\Users\Admin\AppData\Roaming\uaurquuy\usrutcup.exe
    "C:\Users\Admin\AppData\Roaming\uaurquuy\usrutcup.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Enumerates connected drives
    - Suspicious use of SetThreadContext
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1556
  - - C:\Users\Admin\AppData\Roaming\uaurquuy\usrutcup.exe
      "C:\Users\Admin\AppData\Roaming\uaurquuy\usrutcup.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:1676
    - - C:\Windows\SysWOW64\cmd.exe
        
        "C:\Windows\system32\cmd.exe"
        5⤵
        Adds Run key to start application
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:2392
      - C:\Windows\SysWOW64\notepad.exe
        
        "C:\Windows\system32\notepad.exe"
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:3168

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

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

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
C:\Users\Admin\AppData\Roaming\uaurquuy\usrutcup.exe

Filesize
443KB

MD5
880f61558c6a2404be982ba625c56390

SHA1
ee53795ceae1cfc9be2f56693b628ebed43df96e

SHA256
e6e9923edcb92aa5b4194e670f94af1435b5ede9eb7c4fc2604e56481a4b9744

SHA512
cbc1e9eacd14adc1e4d1c421abdaa4042afcbb166888b99912402a4afe825e928efc9b3bf181de3412b43cbf1b983f01c0ce1cd7760b6d3d944b43e0e327147f

Download Submit
\??\c:\program files\common files\system\symsrv.dll.000

Filesize
175B

MD5
1130c911bf5db4b8f7cf9b6f4b457623

SHA1
48e734c4bc1a8b5399bff4954e54b268bde9d54c

SHA256
eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1

SHA512
94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

Download Submit
memory/784-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/784-11-0x0000000076315000-0x0000000076316000-memory.dmp

Filesize
4KB

Download
memory/784-12-0x0000000076300000-0x0000000076363000-memory.dmp

Filesize
396KB

Download
memory/784-29-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/784-30-0x0000000076300000-0x0000000076363000-memory.dmp

Filesize
396KB

Download
memory/1556-57-0x0000000076300000-0x0000000076363000-memory.dmp

Filesize
396KB

Download
memory/1556-24-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1556-34-0x0000000076300000-0x0000000076363000-memory.dmp

Filesize
396KB

Download
memory/1556-56-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1556-33-0x0000000076300000-0x0000000076363000-memory.dmp

Filesize
396KB

Download
memory/1676-39-0x0000000076300000-0x0000000076363000-memory.dmp

Filesize
396KB

Download
memory/1676-53-0x0000000076300000-0x0000000076363000-memory.dmp

Filesize
396KB

Download
memory/2392-40-0x0000000000E90000-0x0000000000E91000-memory.dmp

Filesize
4KB

Download
memory/2392-60-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2392-41-0x0000000000E90000-0x0000000000E91000-memory.dmp

Filesize
4KB

Download
memory/2392-78-0x0000000076300000-0x0000000076363000-memory.dmp

Filesize
396KB

Download
memory/2392-43-0x0000000000FF0000-0x0000000000FF8000-memory.dmp

Filesize
32KB

Download
memory/2392-45-0x00000000014D0000-0x00000000014D1000-memory.dmp

Filesize
4KB

Download
memory/2392-42-0x0000000000FF0000-0x0000000000FF8000-memory.dmp

Filesize
32KB

Download
memory/2392-50-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2392-49-0x0000000000E90000-0x0000000000E91000-memory.dmp

Filesize
4KB

Download
memory/2392-77-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2392-58-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2392-66-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2392-54-0x0000000076300000-0x0000000076363000-memory.dmp

Filesize
396KB

Download
memory/2392-62-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2392-61-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3168-71-0x0000000004180000-0x0000000004181000-memory.dmp

Filesize
4KB

Download
memory/3168-75-0x00000000024E0000-0x00000000024E1000-memory.dmp

Filesize
4KB

Download
memory/4980-13-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/4980-27-0x0000000076300000-0x0000000076363000-memory.dmp

Filesize
396KB

Download
memory/4980-15-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/4980-16-0x0000000076300000-0x0000000076363000-memory.dmp

Filesize
396KB

Download
memory/4980-25-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads