mylobot | 598857ebe87e67db25ccf5a543cd553b77fe4be93e9808e236f90068432788a8

Analysis

max time kernel
149s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
01-09-2024 23:52

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General

Target

nex.exe
Size

367KB
MD5

5111c960148d9847a4b4fb25f0b6f1e6
SHA1

21c954d9ec208c169630983970f6a59cbe25ab2e
SHA256

598857ebe87e67db25ccf5a543cd553b77fe4be93e9808e236f90068432788a8
SHA512

e86cd82864f2daa6dbbed8d13f9cbe4c27dacfcd74fcaea43bd1e0c6dc2aaacfe96c1659513b9f4cfd5f7a7b6cf380db7441f5f491b3ef5d17e32e0aa38afab5
SSDEEP

6144:kfeWTE1rkt826L4xd1EiftWt6empEVZlVISrt5AuK+Fwk4/lqIN9P8GzgUy:kfbTE1rkt826L4xd1EiEt6empQ+uK+a4

Score

10^/10

mylobot botnet discovery persistence

Malware Config

Extracted

Family

mylobot

onthestage.ru:6521

krebson.ru:4685

stanislasarnoud.ru:5739

Signatures

Mylobot
Botnet which first appeared in 2017 written in C++.
botnet mylobot

Executes dropped EXE 2 IoCs

Processes:

utrugquc.exeutrugquc.exe

pid	Process
3884	utrugquc.exe
2876	utrugquc.exe

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-1-5-21-523280732-2327480845-3730041215-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\wljyc = "C:\\Users\\Admin\\AppData\\Roaming\\reuydubf\\utrugquc.exe"	cmd.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

nex.exeutrugquc.exe

description	pid	Process	procid_target
PID 3392 set thread context of 2888	3392	nex.exe	91
PID 3884 set thread context of 2876	3884	utrugquc.exe	94

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:

nex.exenex.exeutrugquc.exeutrugquc.execmd.exenotepad.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nex.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nex.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	utrugquc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	utrugquc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe

Suspicious use of WriteProcessMemory 37 IoCs

Processes:

nex.exenex.exeutrugquc.exeutrugquc.execmd.exe

description	pid	Process	procid_target
PID 3392 wrote to memory of 2888	3392	nex.exe	91
PID 3392 wrote to memory of 2888	3392	nex.exe	91
PID 3392 wrote to memory of 2888	3392	nex.exe	91
PID 3392 wrote to memory of 2888	3392	nex.exe	91
PID 3392 wrote to memory of 2888	3392	nex.exe	91
PID 3392 wrote to memory of 2888	3392	nex.exe	91
PID 3392 wrote to memory of 2888	3392	nex.exe	91
PID 3392 wrote to memory of 2888	3392	nex.exe	91
PID 3392 wrote to memory of 2888	3392	nex.exe	91
PID 3392 wrote to memory of 2888	3392	nex.exe	91
PID 2888 wrote to memory of 3884	2888	nex.exe	92
PID 2888 wrote to memory of 3884	2888	nex.exe	92
PID 2888 wrote to memory of 3884	2888	nex.exe	92
PID 3884 wrote to memory of 2876	3884	utrugquc.exe	94
PID 3884 wrote to memory of 2876	3884	utrugquc.exe	94
PID 3884 wrote to memory of 2876	3884	utrugquc.exe	94
PID 3884 wrote to memory of 2876	3884	utrugquc.exe	94
PID 3884 wrote to memory of 2876	3884	utrugquc.exe	94
PID 3884 wrote to memory of 2876	3884	utrugquc.exe	94
PID 3884 wrote to memory of 2876	3884	utrugquc.exe	94
PID 3884 wrote to memory of 2876	3884	utrugquc.exe	94
PID 3884 wrote to memory of 2876	3884	utrugquc.exe	94
PID 3884 wrote to memory of 2876	3884	utrugquc.exe	94
PID 2876 wrote to memory of 4156	2876	utrugquc.exe	95
PID 2876 wrote to memory of 4156	2876	utrugquc.exe	95
PID 2876 wrote to memory of 4156	2876	utrugquc.exe	95
PID 2876 wrote to memory of 4156	2876	utrugquc.exe	95
PID 2876 wrote to memory of 4156	2876	utrugquc.exe	95
PID 2876 wrote to memory of 4156	2876	utrugquc.exe	95
PID 2876 wrote to memory of 4156	2876	utrugquc.exe	95
PID 4156 wrote to memory of 4856	4156	cmd.exe	97
PID 4156 wrote to memory of 4856	4156	cmd.exe	97
PID 4156 wrote to memory of 4856	4156	cmd.exe	97
PID 4156 wrote to memory of 4856	4156	cmd.exe	97
PID 4156 wrote to memory of 4856	4156	cmd.exe	97
PID 4156 wrote to memory of 4856	4156	cmd.exe	97
PID 4156 wrote to memory of 4856	4156	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\nex.exe
"C:\Users\Admin\AppData\Local\Temp\nex.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3392
- C:\Users\Admin\AppData\Local\Temp\nex.exe
  "C:\Users\Admin\AppData\Local\Temp\nex.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2888
- - C:\Users\Admin\AppData\Roaming\reuydubf\utrugquc.exe
    "C:\Users\Admin\AppData\Roaming\reuydubf\utrugquc.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3884
  - - C:\Users\Admin\AppData\Roaming\reuydubf\utrugquc.exe
      "C:\Users\Admin\AppData\Roaming\reuydubf\utrugquc.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2876
    - - 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:4156
      - C:\Windows\SysWOW64\notepad.exe
        
        "C:\Windows\system32\notepad.exe"
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:4856

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\reuydubf\utrugquc.exe

Filesize
367KB

MD5
5111c960148d9847a4b4fb25f0b6f1e6

SHA1
21c954d9ec208c169630983970f6a59cbe25ab2e

SHA256
598857ebe87e67db25ccf5a543cd553b77fe4be93e9808e236f90068432788a8

SHA512
e86cd82864f2daa6dbbed8d13f9cbe4c27dacfcd74fcaea43bd1e0c6dc2aaacfe96c1659513b9f4cfd5f7a7b6cf380db7441f5f491b3ef5d17e32e0aa38afab5

Download Submit
memory/2876-18-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2888-1-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2888-3-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2888-4-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2888-5-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/3392-0-0x00000000005A0000-0x00000000005A1000-memory.dmp

Filesize
4KB

Download
memory/3884-13-0x0000000000400000-0x0000000000460000-memory.dmp

Filesize
384KB

Download
memory/3884-33-0x0000000000400000-0x0000000000460000-memory.dmp

Filesize
384KB

Download
memory/4156-29-0x00000000009B0000-0x00000000009BB000-memory.dmp

Filesize
44KB

Download
memory/4156-38-0x00000000009B0000-0x00000000009BB000-memory.dmp

Filesize
44KB

Download
memory/4156-24-0x00000000007F0000-0x00000000007F1000-memory.dmp

Filesize
4KB

Download
memory/4156-22-0x00000000006D0000-0x00000000006D8000-memory.dmp

Filesize
32KB

Download
memory/4156-28-0x00000000001C0000-0x00000000001C1000-memory.dmp

Filesize
4KB

Download
memory/4156-19-0x00000000001C0000-0x00000000001C1000-memory.dmp

Filesize
4KB

Download
memory/4156-32-0x00000000009B0000-0x00000000009BB000-memory.dmp

Filesize
44KB

Download
memory/4156-20-0x00000000001C0000-0x00000000001C1000-memory.dmp

Filesize
4KB

Download
memory/4156-34-0x00000000009B0000-0x00000000009BB000-memory.dmp

Filesize
44KB

Download
memory/4156-21-0x00000000006D0000-0x00000000006D8000-memory.dmp

Filesize
32KB

Download
memory/4156-37-0x00000000009B0000-0x00000000009BB000-memory.dmp

Filesize
44KB

Download
memory/4156-36-0x00000000009B0000-0x00000000009BB000-memory.dmp

Filesize
44KB

Download
memory/4156-40-0x00000000009B0000-0x00000000009BB000-memory.dmp

Filesize
44KB

Download
memory/4156-55-0x00000000009B0000-0x00000000009BB000-memory.dmp

Filesize
44KB

Download
memory/4156-54-0x00000000001C0000-0x00000000001C1000-memory.dmp

Filesize
4KB

Download
memory/4856-52-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4856-51-0x0000000000B40000-0x0000000000B41000-memory.dmp

Filesize
4KB

Download
memory/4856-53-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4856-47-0x0000000004140000-0x0000000004141000-memory.dmp

Filesize
4KB

Download