nullmixer | e6ea98b046b11a35efa0ac1243f6190ff4d4247a35784e65a9feaaf4918ae779

Analysis

max time kernel
440s
max time network
1162s
platform
windows11-21h2_x64
resource
win11-20240221-en
resource tags

arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
submitted
03-03-2024 21:57

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General

Target

setup_installer.exe
Size

1.5MB
MD5

78418bfb23c7adf70828f675e990de49
SHA1

534a26817c39972287abf166bb00c831440a1e57
SHA256

b14218cb639c6afa35a66cf418035ce10475b53f5386896a44327fd48d8447c8
SHA512

5df88e9bd4d241b69acba4499845e68286cd24fffed582864c24ad4c5d9bd47041c99ac32cc023c7a6dbe4cecaed39882274cbf4e12aedd5220c6e51075a8dd8
SSDEEP

24576:xcVkKSqXCeomdCFDWHp/7F82H1qjUEPY/RQ5DsvLwcaBhdZIl9mTkPdei+uYvSm1:xcBFCpZgu2VqjUEwJ84vLRaBtIl9mT4Y

Score

10^/10

nullmixer smokeloader pub6 aspackv2 backdoor dropper evasion spyware stealer trojan

Malware Config

Extracted

Family

nullmixer

http://wxkeww.xyz/

Extracted

Family

smokeloader

Botnet

pub6

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

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

resource	yara_rule
behavioral10/files/0x000100000002a7c8-18.dat	aspack_v212_v242
behavioral10/files/0x000100000002a7c4-24.dat	aspack_v212_v242
behavioral10/files/0x000100000002a7c3-25.dat	aspack_v212_v242
behavioral10/files/0x000100000002a7c6-35.dat	aspack_v212_v242

Executes dropped EXE 3 IoCs

pid	Process
2352	setup_install.exe
1492	karotima_1.exe
1100	karotima_2.exe

Loads dropped DLL 7 IoCs

pid	Process
2352	setup_install.exe
2352	setup_install.exe
2352	setup_install.exe
2352	setup_install.exe
2352	setup_install.exe
2352	setup_install.exe
2352	setup_install.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.

flow	ioc
1	ipinfo.io
4	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

pid	pid_target	Process	procid_target
1168	2352	WerFault.exe	77
1312	1100	WerFault.exe	84

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3528 wrote to memory of 2352	3528	setup_installer.exe	77
PID 3528 wrote to memory of 2352	3528	setup_installer.exe	77
PID 3528 wrote to memory of 2352	3528	setup_installer.exe	77
PID 2352 wrote to memory of 4080	2352	setup_install.exe	81
PID 2352 wrote to memory of 4080	2352	setup_install.exe	81
PID 2352 wrote to memory of 4080	2352	setup_install.exe	81
PID 2352 wrote to memory of 1844	2352	setup_install.exe	82
PID 2352 wrote to memory of 1844	2352	setup_install.exe	82
PID 2352 wrote to memory of 1844	2352	setup_install.exe	82
PID 4080 wrote to memory of 1492	4080	cmd.exe	83
PID 4080 wrote to memory of 1492	4080	cmd.exe	83
PID 4080 wrote to memory of 1492	4080	cmd.exe	83
PID 1844 wrote to memory of 1100	1844	cmd.exe	84
PID 1844 wrote to memory of 1100	1844	cmd.exe	84
PID 1844 wrote to memory of 1100	1844	cmd.exe	84

C:\Users\Admin\AppData\Local\Temp\setup_installer.exe
"C:\Users\Admin\AppData\Local\Temp\setup_installer.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3528
- C:\Users\Admin\AppData\Local\Temp\7zS8CDD27D7\setup_install.exe
  "C:\Users\Admin\AppData\Local\Temp\7zS8CDD27D7\setup_install.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2352
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c karotima_1.exe
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4080
  - - C:\Users\Admin\AppData\Local\Temp\7zS8CDD27D7\karotima_1.exe
      karotima_1.exe
      4⤵
      Modifies Windows Defender Real-time Protection settings
      Executes dropped EXE
      PID:1492
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c karotima_2.exe
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1844
  - - C:\Users\Admin\AppData\Local\Temp\7zS8CDD27D7\karotima_2.exe
      karotima_2.exe
      4⤵
      Executes dropped EXE
      PID:1100
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 1100 -s 304
        5⤵
        Program crash
        
        PID:1312
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2352 -s 532
    3⤵
    - Program crash
    PID:1168

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2352 -ip 2352
1⤵
PID:3036

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 1100 -ip 1100
1⤵
PID:4452

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

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\7zS8CDD27D7\karotima_1.txt

Filesize
1.0MB

MD5
9108ad5775c76cccbb4eadf02de24f5d

SHA1
82996bc4f72b3234536d0b58630d5d26bcf904b0

SHA256
c9d5525b2f2b76087121039ee1c23ed35508e60f653479722ec64ea3a064878e

SHA512
19021a28555bba1fe1bdcdc8845f1bcadebd256c7db02b9329d6b44ae01a123a00e162cc34a97ba51f088cafa6f54ab1de8f82f771ac54b94a3a796f84f73362

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8CDD27D7\karotima_2.txt

Filesize
222KB

MD5
80e74cf9f38c5712c6c2432a509c8bc7

SHA1
62ccdca04b3685728ce7f1a785cc01f3a3f3b3dc

SHA256
9ff44c4da853cdbe606d2cfe4d04b410c3ae603acf0f1d3f75195b6236e0e123

SHA512
d602cd95ad38cacae41b4848e72ac54ad81d287e1c825d68a088009512b14b5290a5a6c3032ebb2c91fecb5f743d519e92f1ccb27f5fe2841094a693d2b8de49

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8CDD27D7\libcurl.dll

Filesize
218KB

MD5
d09be1f47fd6b827c81a4812b4f7296f

SHA1
028ae3596c0790e6d7f9f2f3c8e9591527d267f7

SHA256
0de53e7be51789adaec5294346220b20f793e7f8d153a3c110a92d658760697e

SHA512
857f44a1383c29208509b8f1164b6438d750d5bb4419add7626986333433e67a0d1211ec240ce9472f30a1f32b16c8097aceba4b2255641b3d8928f94237f595

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8CDD27D7\libcurlpp.dll

Filesize
54KB

MD5
e6e578373c2e416289a8da55f1dc5e8e

SHA1
b601a229b66ec3d19c2369b36216c6f6eb1c063e

SHA256
43e86d650a68f1f91fa2f4375aff2720e934aa78fa3d33e06363122bf5a9535f

SHA512
9df6a8c418113a77051f6cb02745ad48c521c13cdadb85e0e37f79e29041464c8c7d7ba8c558fdd877035eb8475b6f93e7fc62b38504ddfe696a61480cabac89

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8CDD27D7\libgcc_s_dw2-1.dll

Filesize
113KB

MD5
9aec524b616618b0d3d00b27b6f51da1

SHA1
64264300801a353db324d11738ffed876550e1d3

SHA256
59a466f77584438fc3abc0f43edc0fc99d41851726827a008841f05cfe12da7e

SHA512
0648a26940e8f4aad73b05ad53e43316dd688e5d55e293cce88267b2b8744412be2e0d507dadad830776bf715bcd819f00f5d1f7ac1c5f1c4f682fb7457a20d0

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8CDD27D7\libstdc++-6.dll

Filesize
647KB

MD5
5e279950775baae5fea04d2cc4526bcc

SHA1
8aef1e10031c3629512c43dd8b0b5d9060878453

SHA256
97de47068327bb822b33c7106f9cbb489480901a6749513ef5c31d229dcaca87

SHA512
666325e9ed71da4955058aea31b91e2e848be43211e511865f393b7f537c208c6b31c182f7d728c2704e9fc87e7d1be3f98f5fee4d34f11c56764e1c599afd02

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8CDD27D7\libwinpthread-1.dll

Filesize
69KB

MD5
1e0d62c34ff2e649ebc5c372065732ee

SHA1
fcfaa36ba456159b26140a43e80fbd7e9d9af2de

SHA256
509cb1d1443b623a02562ac760bced540e327c65157ffa938a22f75e38155723

SHA512
3653f8ed8ad3476632f731a3e76c6aae97898e4bf14f70007c93e53bc443906835be29f861c4a123db5b11e0f3dd5013b2b3833469a062060825df9ee708dc61

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8CDD27D7\setup_install.exe

Filesize
290KB

MD5
118f130d93db3be4452ad8a0751509df

SHA1
4cac4b964784aadc7e6f41c21b854c668dca6981

SHA256
f7dec887c3345567ce86ce60cc8841a6a54eda35049811049debd1c5451656f4

SHA512
ec263d9cfc0a0324f8f79f6f6703f507d06f454cbc9964595a00d9606aae86c34920c8a10ef3d4413aceb85e33d731634200c0e7ee099b8a35baf8e69f46234f

Download Submit
memory/1100-67-0x0000000004880000-0x0000000004889000-memory.dmp

Filesize
36KB

Download
memory/1100-66-0x0000000002CD0000-0x0000000002DD0000-memory.dmp

Filesize
1024KB

Download
memory/2352-45-0x0000000064940000-0x0000000064959000-memory.dmp

Filesize
100KB

Download
memory/2352-54-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/2352-43-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/2352-44-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/2352-46-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/2352-47-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/2352-40-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/2352-48-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/2352-49-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/2352-51-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/2352-52-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/2352-53-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/2352-50-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/2352-41-0x0000000000FF0000-0x000000000107F000-memory.dmp

Filesize
572KB

Download
memory/2352-55-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/2352-37-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/2352-39-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/2352-61-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/2352-62-0x0000000064940000-0x0000000064959000-memory.dmp

Filesize
100KB

Download
memory/2352-63-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/2352-64-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/2352-36-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/2352-68-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/2352-22-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/2352-65-0x000000006EB40000-0x000000006EB63000-memory.dmp

Filesize
140KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads