nullmixer | 2cb7b724ba108cfab0f07348997e32c7c531084ffd2c9326e6ba51ad8f4ed656

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
25-03-2024 17:35

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

de91f84e9b1a869d1e7890e9bf4d8c3c.exe
Size

1.5MB
MD5

de91f84e9b1a869d1e7890e9bf4d8c3c
SHA1

10d78089cebab23bf04a9d1502f078077c344176
SHA256

2cb7b724ba108cfab0f07348997e32c7c531084ffd2c9326e6ba51ad8f4ed656
SHA512

e4bec86e99b7052951a5928ffa9c0c4d30ef085508638748caca41f9e286e4d4c234172303879883966b0d89d9a93a982ce6a7b48e4017ff6b30e25e7a99ca5a
SSDEEP

49152:xcBRCpZgu25meQkEwJ84vLRaBtIl9mTVjj1+0:xlZ25m7TCvLUBsKVv1+0

Score

10^/10

nullmixer smokeloader pub6 aspackv2 backdoor dropper evasion 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

description	ioc	Process
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
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableRawWriteNotification = "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
behavioral2/files/0x0007000000023209-18.dat	aspack_v212_v242
behavioral2/files/0x0007000000023205-25.dat	aspack_v212_v242
behavioral2/files/0x0007000000023204-26.dat	aspack_v212_v242
behavioral2/files/0x0007000000023207-34.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	de91f84e9b1a869d1e7890e9bf4d8c3c.exe

Executes dropped EXE 3 IoCs

pid	Process
4508	setup_install.exe
2708	karotima_2.exe
524	karotima_1.exe

Loads dropped DLL 7 IoCs

pid	Process
4508	setup_install.exe
4508	setup_install.exe
4508	setup_install.exe
4508	setup_install.exe
4508	setup_install.exe
4508	setup_install.exe
2708	karotima_2.exe

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
14	ipinfo.io
16	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
1076	4508	WerFault.exe	91
3484	2708	WerFault.exe	99

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

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

pid	Process
2708	karotima_2.exe
2708	karotima_2.exe
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found
3472	Process not Found

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2708	karotima_2.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeShutdownPrivilege	3472	Process not Found
Token: SeCreatePagefilePrivilege	3472	Process not Found

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
3472	Process not Found

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4480 wrote to memory of 4508	4480	de91f84e9b1a869d1e7890e9bf4d8c3c.exe	91
PID 4480 wrote to memory of 4508	4480	de91f84e9b1a869d1e7890e9bf4d8c3c.exe	91
PID 4480 wrote to memory of 4508	4480	de91f84e9b1a869d1e7890e9bf4d8c3c.exe	91
PID 4508 wrote to memory of 4692	4508	setup_install.exe	97
PID 4508 wrote to memory of 4692	4508	setup_install.exe	97
PID 4508 wrote to memory of 4692	4508	setup_install.exe	97
PID 4508 wrote to memory of 4424	4508	setup_install.exe	98
PID 4508 wrote to memory of 4424	4508	setup_install.exe	98
PID 4508 wrote to memory of 4424	4508	setup_install.exe	98
PID 4424 wrote to memory of 2708	4424	cmd.exe	99
PID 4424 wrote to memory of 2708	4424	cmd.exe	99
PID 4424 wrote to memory of 2708	4424	cmd.exe	99
PID 4692 wrote to memory of 524	4692	cmd.exe	100
PID 4692 wrote to memory of 524	4692	cmd.exe	100
PID 4692 wrote to memory of 524	4692	cmd.exe	100

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\de91f84e9b1a869d1e7890e9bf4d8c3c.exe
"C:\Users\Admin\AppData\Local\Temp\de91f84e9b1a869d1e7890e9bf4d8c3c.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4480
- C:\Users\Admin\AppData\Local\Temp\7zS08111027\setup_install.exe
  "C:\Users\Admin\AppData\Local\Temp\7zS08111027\setup_install.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:4508
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c karotima_1.exe
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4692
  - - C:\Users\Admin\AppData\Local\Temp\7zS08111027\karotima_1.exe
      karotima_1.exe
      4⤵
      Modifies Windows Defender Real-time Protection settings
      Executes dropped EXE
      PID:524
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c karotima_2.exe
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4424
  - - C:\Users\Admin\AppData\Local\Temp\7zS08111027\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:2708
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2708 -s 412
        5⤵
        Program crash
        
        PID:3484
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4508 -s 508
    3⤵
    - Program crash
    PID:1076

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4508 -ip 4508
1⤵
PID:1588

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 2708 -ip 2708
1⤵
PID:532

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

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\7zS08111027\karotima_1.txt

Filesize
1.0MB

MD5
9108ad5775c76cccbb4eadf02de24f5d

SHA1
82996bc4f72b3234536d0b58630d5d26bcf904b0

SHA256
c9d5525b2f2b76087121039ee1c23ed35508e60f653479722ec64ea3a064878e

SHA512
19021a28555bba1fe1bdcdc8845f1bcadebd256c7db02b9329d6b44ae01a123a00e162cc34a97ba51f088cafa6f54ab1de8f82f771ac54b94a3a796f84f73362

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS08111027\karotima_2.txt

Filesize
325KB

MD5
4cf48cef81eb5c6b4b188a96f2f67ef8

SHA1
4988f380fbd72106a36b2c018d66bb7d80ff9a21

SHA256
e54f1a3b63aa2a148bd7d71cdd0cd35e0ee14940c50f3d870a7b0aa0b9089379

SHA512
47d2c7415223dc1105d1ad167572b4ed875bebfd42d3ca29f9465dfcb007e40e1c1a7550d2981e41add30acf1848dd7a64c4d0ac10f01321e6e919ac2614c746

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS08111027\libcurl.dll

Filesize
218KB

MD5
d09be1f47fd6b827c81a4812b4f7296f

SHA1
028ae3596c0790e6d7f9f2f3c8e9591527d267f7

SHA256
0de53e7be51789adaec5294346220b20f793e7f8d153a3c110a92d658760697e

SHA512
857f44a1383c29208509b8f1164b6438d750d5bb4419add7626986333433e67a0d1211ec240ce9472f30a1f32b16c8097aceba4b2255641b3d8928f94237f595

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS08111027\libcurlpp.dll

Filesize
54KB

MD5
e6e578373c2e416289a8da55f1dc5e8e

SHA1
b601a229b66ec3d19c2369b36216c6f6eb1c063e

SHA256
43e86d650a68f1f91fa2f4375aff2720e934aa78fa3d33e06363122bf5a9535f

SHA512
9df6a8c418113a77051f6cb02745ad48c521c13cdadb85e0e37f79e29041464c8c7d7ba8c558fdd877035eb8475b6f93e7fc62b38504ddfe696a61480cabac89

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS08111027\libgcc_s_dw2-1.dll

Filesize
113KB

MD5
9aec524b616618b0d3d00b27b6f51da1

SHA1
64264300801a353db324d11738ffed876550e1d3

SHA256
59a466f77584438fc3abc0f43edc0fc99d41851726827a008841f05cfe12da7e

SHA512
0648a26940e8f4aad73b05ad53e43316dd688e5d55e293cce88267b2b8744412be2e0d507dadad830776bf715bcd819f00f5d1f7ac1c5f1c4f682fb7457a20d0

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS08111027\libstdc++-6.dll

Filesize
647KB

MD5
5e279950775baae5fea04d2cc4526bcc

SHA1
8aef1e10031c3629512c43dd8b0b5d9060878453

SHA256
97de47068327bb822b33c7106f9cbb489480901a6749513ef5c31d229dcaca87

SHA512
666325e9ed71da4955058aea31b91e2e848be43211e511865f393b7f537c208c6b31c182f7d728c2704e9fc87e7d1be3f98f5fee4d34f11c56764e1c599afd02

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS08111027\libwinpthread-1.dll

Filesize
69KB

MD5
1e0d62c34ff2e649ebc5c372065732ee

SHA1
fcfaa36ba456159b26140a43e80fbd7e9d9af2de

SHA256
509cb1d1443b623a02562ac760bced540e327c65157ffa938a22f75e38155723

SHA512
3653f8ed8ad3476632f731a3e76c6aae97898e4bf14f70007c93e53bc443906835be29f861c4a123db5b11e0f3dd5013b2b3833469a062060825df9ee708dc61

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS08111027\setup_install.exe

Filesize
287KB

MD5
206e081f42fb86d2b282d27f40a2abe3

SHA1
02ed68afde69c4ce8385966d5ff06f1eb1e28f7b

SHA256
8209321667554dcfe083c5e205c6ec62a9460e46ed19ec2e802a9893a9b2c1f7

SHA512
cb3e041b37543bc9acd5f5231fe72419943be28e506da60c15094563ad8df2d2476a42ab2b5ece50193ee5fedb1a2a264ee50d4a9f23764d3604bd2f18ec9087

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

Filesize
1.6MB

MD5
4f3387277ccbd6d1f21ac5c07fe4ca68

SHA1
e16506f662dc92023bf82def1d621497c8ab5890

SHA256
767a3fc4a7a6818cdc3f0b99aaa95db694f6bcde719d2057a88b3d4df3d74fac

SHA512
9da199ac69e3c0d4e0c6307e0ab8178f12cc25cb2f14c3511f6b64e6e60a925c860f3263cb38353a97b55a71ef4d27f8cb7fa3cfc08e7c1a349fd8d209dfa219

Download Submit
memory/2708-71-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/2708-70-0x00000000004B0000-0x00000000004B9000-memory.dmp

Filesize
36KB

Download
memory/2708-66-0x0000000000530000-0x0000000000630000-memory.dmp

Filesize
1024KB

Download
memory/2708-75-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/3472-72-0x00000000014B0000-0x00000000014C5000-memory.dmp

Filesize
84KB

Download
memory/4508-47-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/4508-59-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4508-45-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/4508-46-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/4508-44-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/4508-48-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4508-49-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4508-50-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4508-53-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4508-52-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4508-51-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4508-42-0x0000000064940000-0x0000000064959000-memory.dmp

Filesize
100KB

Download
memory/4508-41-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/4508-43-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/4508-60-0x0000000064940000-0x0000000064959000-memory.dmp

Filesize
100KB

Download
memory/4508-61-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/4508-62-0x000000006EB40000-0x000000006EB63000-memory.dmp

Filesize
140KB

Download
memory/4508-63-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/4508-64-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/4508-38-0x00000000007B0000-0x000000000083F000-memory.dmp

Filesize
572KB

Download
memory/4508-39-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/4508-35-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/4508-37-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/4508-36-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/4508-22-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download