nullmixer | 3675ddb9d16e43fd54dd441f57a0aa0c20ae7b6a85b81f2b867c753c3503934f

Analysis

max time kernel
150s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
12-04-2024 03:30

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General

Target

setup_installer.exe
Size

1.5MB
MD5

0d9f7ef9fc85315c134a06c483f0a694
SHA1

9a8f6eb079f6f1c8421a0f78bb5387b061d843b8
SHA256

5d0215d15cc28fd783808e7fe1103cff029e1a1caa1370057c6e5cf9c00d1b2a
SHA512

9f1574b81a80126e606cadb17b9556474f38929ffdb8ccf5ce330ffaa0f83e4f818c885f7c1c3b204b3011b1db4ebcff0ba3e96406878f3e873e7cdc22e703bd
SSDEEP

24576:xcVkKSGXCeomdCFDWHp/7F82Py2nNEPY/RQ5DsvLwcaBhdZIl9mTqUf+HDpFWndF:xcBNCpZgu2PyONEwJ84vLRaBtIl9mTiw

Score

10^/10

nullmixer smokeloader pub6 aspackv2 backdoor dropper evasion spyware stealer trojan

Malware Config

Extracted

Family

nullmixer

http://marisana.xyz/

Extracted

Family

smokeloader

Botnet

pub6

Extracted

Family

smokeloader

Version

2020

http://conceitosseg.com/upload/

http://integrasidata.com/upload/

http://ozentekstil.com/upload/

http://finbelportal.com/upload/

http://telanganadigital.com/upload/

rc4.i32

Signatures

Modifies Windows Defender Real-time Protection settings 3 TTPs 7 IoCs

evasion trojan

Modify Registry

T1112

Windows Service

T1543.003

Disable or Modify Tools

T1562.001

Processes:

karotima_1.exe

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableRawWriteNotification = "1"	karotima_1.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection	karotima_1.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	karotima_1.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	karotima_1.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	karotima_1.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableRealtimeMonitoring = "1"	karotima_1.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableIOAVProtection = "1"	karotima_1.exe

NullMixer
NullMixer is a malware dropper leading to an infection chain of a wide variety of malware families.
dropper nullmixer
SmokeLoader
Modular backdoor trojan in use since 2014.
trojan backdoor smokeloader

ASPack v2.12-2.42 4 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

Processes:

resource	yara_rule
behavioral4/files/0x0007000000023207-18.dat	aspack_v212_v242
behavioral4/files/0x0007000000023203-26.dat	aspack_v212_v242
behavioral4/files/0x0007000000023202-27.dat	aspack_v212_v242
behavioral4/files/0x0007000000023205-36.dat	aspack_v212_v242

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

Processes:

setup_installer.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	setup_installer.exe

Executes dropped EXE 3 IoCs

Processes:

setup_install.exekarotima_2.exekarotima_1.exe

pid	Process
4616	setup_install.exe
1228	karotima_2.exe
4416	karotima_1.exe

Loads dropped DLL 8 IoCs

Processes:

setup_install.exekarotima_2.exe

pid	Process
4616	setup_install.exe
4616	setup_install.exe
4616	setup_install.exe
4616	setup_install.exe
4616	setup_install.exe
4616	setup_install.exe
4616	setup_install.exe
1228	karotima_2.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow	ioc
8	ipinfo.io
9	ipinfo.io

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

System Information Discovery
T1082

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	Process	procid_target
4732	4616	WerFault.exe	85
4388	1228	WerFault.exe	90

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

karotima_2.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	karotima_2.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	karotima_2.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	karotima_2.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

karotima_2.exe

pid	Process
1228	karotima_2.exe
1228	karotima_2.exe
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376
3376

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

karotima_2.exe

pid	Process
1228	karotima_2.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

description	pid	Process
Token: SeShutdownPrivilege	3376
Token: SeCreatePagefilePrivilege	3376
Token: SeShutdownPrivilege	3376
Token: SeCreatePagefilePrivilege	3376
Token: SeShutdownPrivilege	3376
Token: SeCreatePagefilePrivilege	3376

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

setup_installer.exesetup_install.execmd.execmd.exe

description	pid	Process	procid_target
PID 2868 wrote to memory of 4616	2868	setup_installer.exe	85
PID 2868 wrote to memory of 4616	2868	setup_installer.exe	85
PID 2868 wrote to memory of 4616	2868	setup_installer.exe	85
PID 4616 wrote to memory of 2428	4616	setup_install.exe	88
PID 4616 wrote to memory of 2428	4616	setup_install.exe	88
PID 4616 wrote to memory of 2428	4616	setup_install.exe	88
PID 4616 wrote to memory of 4120	4616	setup_install.exe	89
PID 4616 wrote to memory of 4120	4616	setup_install.exe	89
PID 4616 wrote to memory of 4120	4616	setup_install.exe	89
PID 4120 wrote to memory of 1228	4120	cmd.exe	90
PID 4120 wrote to memory of 1228	4120	cmd.exe	90
PID 4120 wrote to memory of 1228	4120	cmd.exe	90
PID 2428 wrote to memory of 4416	2428	cmd.exe	91
PID 2428 wrote to memory of 4416	2428	cmd.exe	91
PID 2428 wrote to memory of 4416	2428	cmd.exe	91

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\setup_installer.exe
"C:\Users\Admin\AppData\Local\Temp\setup_installer.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2868
- C:\Users\Admin\AppData\Local\Temp\7zS43B4B207\setup_install.exe
  "C:\Users\Admin\AppData\Local\Temp\7zS43B4B207\setup_install.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:4616
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c karotima_1.exe
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2428
  - - C:\Users\Admin\AppData\Local\Temp\7zS43B4B207\karotima_1.exe
      karotima_1.exe
      4⤵
      Modifies Windows Defender Real-time Protection settings
      Executes dropped EXE
      PID:4416
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c karotima_2.exe
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4120
  - - C:\Users\Admin\AppData\Local\Temp\7zS43B4B207\karotima_2.exe
      karotima_2.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Checks SCSI registry key(s)
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      PID:1228
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 1228 -s 396
        5⤵
        Program crash
        
        PID:4388
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4616 -s 500
    3⤵
    - Program crash
    PID:4732

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4616 -ip 4616
1⤵
PID:1928

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 1228 -ip 1228
1⤵
PID:2272

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\7zS43B4B207\karotima_1.txt

Filesize
1.0MB

MD5
9108ad5775c76cccbb4eadf02de24f5d

SHA1
82996bc4f72b3234536d0b58630d5d26bcf904b0

SHA256
c9d5525b2f2b76087121039ee1c23ed35508e60f653479722ec64ea3a064878e

SHA512
19021a28555bba1fe1bdcdc8845f1bcadebd256c7db02b9329d6b44ae01a123a00e162cc34a97ba51f088cafa6f54ab1de8f82f771ac54b94a3a796f84f73362

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS43B4B207\karotima_2.txt

Filesize
238KB

MD5
6e60dc40e0845b9b8e2ea48cff92a82e

SHA1
8a8465748c412c9804a11629a69d33b1922fbe65

SHA256
42c8eec62a8744104e562a733b00eb669bde519ea39a3888f5206d707232854a

SHA512
8de56c1762e9486a03f52d4d597043ea5fbb57ec68ba7c803fcd484e04da0d24e5bac35d9d8bd8509f43abe0e560bc45a58cdb0222fa3a38cee48fc7cd80bc25

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS43B4B207\libcurl.dll

Filesize
218KB

MD5
d09be1f47fd6b827c81a4812b4f7296f

SHA1
028ae3596c0790e6d7f9f2f3c8e9591527d267f7

SHA256
0de53e7be51789adaec5294346220b20f793e7f8d153a3c110a92d658760697e

SHA512
857f44a1383c29208509b8f1164b6438d750d5bb4419add7626986333433e67a0d1211ec240ce9472f30a1f32b16c8097aceba4b2255641b3d8928f94237f595

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS43B4B207\libcurlpp.dll

Filesize
54KB

MD5
e6e578373c2e416289a8da55f1dc5e8e

SHA1
b601a229b66ec3d19c2369b36216c6f6eb1c063e

SHA256
43e86d650a68f1f91fa2f4375aff2720e934aa78fa3d33e06363122bf5a9535f

SHA512
9df6a8c418113a77051f6cb02745ad48c521c13cdadb85e0e37f79e29041464c8c7d7ba8c558fdd877035eb8475b6f93e7fc62b38504ddfe696a61480cabac89

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS43B4B207\libgcc_s_dw2-1.dll

Filesize
113KB

MD5
9aec524b616618b0d3d00b27b6f51da1

SHA1
64264300801a353db324d11738ffed876550e1d3

SHA256
59a466f77584438fc3abc0f43edc0fc99d41851726827a008841f05cfe12da7e

SHA512
0648a26940e8f4aad73b05ad53e43316dd688e5d55e293cce88267b2b8744412be2e0d507dadad830776bf715bcd819f00f5d1f7ac1c5f1c4f682fb7457a20d0

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS43B4B207\libstdc++-6.dll

Filesize
647KB

MD5
5e279950775baae5fea04d2cc4526bcc

SHA1
8aef1e10031c3629512c43dd8b0b5d9060878453

SHA256
97de47068327bb822b33c7106f9cbb489480901a6749513ef5c31d229dcaca87

SHA512
666325e9ed71da4955058aea31b91e2e848be43211e511865f393b7f537c208c6b31c182f7d728c2704e9fc87e7d1be3f98f5fee4d34f11c56764e1c599afd02

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS43B4B207\libwinpthread-1.dll

Filesize
69KB

MD5
1e0d62c34ff2e649ebc5c372065732ee

SHA1
fcfaa36ba456159b26140a43e80fbd7e9d9af2de

SHA256
509cb1d1443b623a02562ac760bced540e327c65157ffa938a22f75e38155723

SHA512
3653f8ed8ad3476632f731a3e76c6aae97898e4bf14f70007c93e53bc443906835be29f861c4a123db5b11e0f3dd5013b2b3833469a062060825df9ee708dc61

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS43B4B207\setup_install.exe

Filesize
287KB

MD5
dcff179c4623cf7abc5d40be102ef14d

SHA1
877e24f315ceaea197b71eb028d8163151af5edf

SHA256
ac04db3daf57d4616ecab03a8d95650c5086a74d1c1b96c049904e05daf8b1fe

SHA512
1a874595719c146b35296202e36583b31e1ff9181102d528c86c9911ad855922645980b5521b28f85bbddb00d38f174217a4ca98d609ca1e530f0cc118832eaf

Download Submit
C:\Users\Admin\AppData\Local\Temp\CC4F.tmp

Filesize
1.6MB

MD5
4f3387277ccbd6d1f21ac5c07fe4ca68

SHA1
e16506f662dc92023bf82def1d621497c8ab5890

SHA256
767a3fc4a7a6818cdc3f0b99aaa95db694f6bcde719d2057a88b3d4df3d74fac

SHA512
9da199ac69e3c0d4e0c6307e0ab8178f12cc25cb2f14c3511f6b64e6e60a925c860f3263cb38353a97b55a71ef4d27f8cb7fa3cfc08e7c1a349fd8d209dfa219

Download Submit
memory/1228-73-0x0000000000400000-0x00000000008A5000-memory.dmp

Filesize
4.6MB

Download
memory/1228-71-0x0000000000AB0000-0x0000000000BB0000-memory.dmp

Filesize
1024KB

Download
memory/1228-72-0x00000000023B0000-0x00000000023B9000-memory.dmp

Filesize
36KB

Download
memory/1228-77-0x0000000000400000-0x00000000008A5000-memory.dmp

Filesize
4.6MB

Download
memory/3376-74-0x0000000002FA0000-0x0000000002FB5000-memory.dmp

Filesize
84KB

Download
memory/4616-50-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4616-43-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/4616-42-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/4616-46-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/4616-47-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/4616-49-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4616-45-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/4616-51-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4616-48-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/4616-52-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4616-54-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4616-53-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4616-44-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/4616-40-0x0000000064940000-0x0000000064959000-memory.dmp

Filesize
100KB

Download
memory/4616-60-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4616-61-0x0000000064940000-0x0000000064959000-memory.dmp

Filesize
100KB

Download
memory/4616-62-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/4616-63-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/4616-64-0x000000006EB40000-0x000000006EB63000-memory.dmp

Filesize
140KB

Download
memory/4616-65-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/4616-66-0x0000000000F70000-0x0000000000FFF000-memory.dmp

Filesize
572KB

Download
memory/4616-41-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/4616-38-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/4616-39-0x0000000000F70000-0x0000000000FFF000-memory.dmp

Filesize
572KB

Download
memory/4616-37-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/4616-33-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/4616-22-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download