nullmixer | 3bc711bf1d32038cdcbbc7ff61228d50e05612cc33a8dcb271d6202f90ae4c6e

Resubmissions

16/01/2024, 20:48

240116-zlfnwabcc6 3

16/01/2024, 20:42

240116-zhex6sadbp 10

Analysis

max time kernel
151s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
16/01/2024, 20:42

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General

Target

setup_installer.exe
Size

1.5MB
MD5

20422726c8e4927d713498906dd09125
SHA1

6ad68482e1e8ed16baff9426d043e36523a26cf5
SHA256

2d249a1e253b6f4cdb33c2d45345ab2ca3af23b45b1e3545ede10ed68e7b9bdb
SHA512

e6b4a3d8ba926b4747210ff85b9961ba87f68eac07a7c9e987cec819f694a9bbbb4df47c1a10c8dce4134c6affd1da57ec02feaf2816396078c6f070b65d3b5c
SSDEEP

24576:xcVkKSZXCeomdCFDWHp/7F82sLDEPY/RQ5DsvLwcaBhdZIl9mT9OHDpFoaGBc6X:xcBaCpZgu2+DEwJ84vLRaBtIl9mTYjje

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
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
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

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 6 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

resource	yara_rule
behavioral4/files/0x0006000000023111-18.dat	aspack_v212_v242
behavioral4/files/0x000600000002310d-25.dat	aspack_v212_v242
behavioral4/files/0x0007000000023108-26.dat	aspack_v212_v242
behavioral4/files/0x0007000000023108-32.dat	aspack_v212_v242
behavioral4/files/0x0007000000023108-31.dat	aspack_v212_v242
behavioral4/files/0x000600000002310f-33.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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	setup_installer.exe

Executes dropped EXE 3 IoCs

pid	Process
4576	setup_install.exe
4640	karotima_1.exe
3316	karotima_2.exe

Loads dropped DLL 7 IoCs

pid	Process
4576	setup_install.exe
4576	setup_install.exe
4576	setup_install.exe
4576	setup_install.exe
4576	setup_install.exe
4576	setup_install.exe
3316	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
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 1 IoCs

pid	pid_target	Process	procid_target
4632	4576	WerFault.exe	87

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
3316	karotima_2.exe
3316	karotima_2.exe
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
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3520	Process not Found
3520	Process not Found
3520	Process not Found
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3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
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3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found
3520	Process not Found

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3316	karotima_2.exe

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
3520	Process not Found

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1016 wrote to memory of 4576	1016	setup_installer.exe	87
PID 1016 wrote to memory of 4576	1016	setup_installer.exe	87
PID 1016 wrote to memory of 4576	1016	setup_installer.exe	87
PID 4576 wrote to memory of 1848	4576	setup_install.exe	91
PID 4576 wrote to memory of 1848	4576	setup_install.exe	91
PID 4576 wrote to memory of 1848	4576	setup_install.exe	91
PID 4576 wrote to memory of 3008	4576	setup_install.exe	90
PID 4576 wrote to memory of 3008	4576	setup_install.exe	90
PID 4576 wrote to memory of 3008	4576	setup_install.exe	90
PID 1848 wrote to memory of 4640	1848	cmd.exe	92
PID 1848 wrote to memory of 4640	1848	cmd.exe	92
PID 1848 wrote to memory of 4640	1848	cmd.exe	92
PID 3008 wrote to memory of 3316	3008	cmd.exe	93
PID 3008 wrote to memory of 3316	3008	cmd.exe	93
PID 3008 wrote to memory of 3316	3008	cmd.exe	93

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:1016
- C:\Users\Admin\AppData\Local\Temp\7zS8F3A5ED7\setup_install.exe
  "C:\Users\Admin\AppData\Local\Temp\7zS8F3A5ED7\setup_install.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:4576
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c karotima_2.exe
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3008
  - - C:\Users\Admin\AppData\Local\Temp\7zS8F3A5ED7\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:3316
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c karotima_1.exe
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1848
  - - C:\Users\Admin\AppData\Local\Temp\7zS8F3A5ED7\karotima_1.exe
      karotima_1.exe
      4⤵
      Modifies Windows Defender Real-time Protection settings
      Executes dropped EXE
      PID:4640
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4576 -s 504
    3⤵
    - Program crash
    PID:4632

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 200 -p 4576 -ip 4576
1⤵
PID:4988

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\7zS8F3A5ED7\karotima_1.txt

Filesize
1.0MB

MD5
9108ad5775c76cccbb4eadf02de24f5d

SHA1
82996bc4f72b3234536d0b58630d5d26bcf904b0

SHA256
c9d5525b2f2b76087121039ee1c23ed35508e60f653479722ec64ea3a064878e

SHA512
19021a28555bba1fe1bdcdc8845f1bcadebd256c7db02b9329d6b44ae01a123a00e162cc34a97ba51f088cafa6f54ab1de8f82f771ac54b94a3a796f84f73362

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8F3A5ED7\karotima_2.txt

Filesize
238KB

MD5
fcd0f1b48eccb2fc312068010c8cb7d7

SHA1
3e0ac2b9c04d2238a37e3602e2b4d14d749b93d8

SHA256
8e9313037e41416a4d9af48b077cfa68457a5c716b164c6b40dfcd43b0775ea8

SHA512
e79e8b30567d391e02a7db111991903522cdeac3ab0216ae78d65be5294e79c6e9794fe2113976d0536c0dcecc05762d355edf3967d8c3682e4a0242b720af6b

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8F3A5ED7\libcurl.dll

Filesize
64KB

MD5
c34e60b74d70f21cb27cda6cba8db7f9

SHA1
9523d9f0dfbeece45b4ffb3145702877ce594a40

SHA256
f29e13cf41767cfd4c88d760b244f1ed2f361c4477f96eade8dfde40ffcc3208

SHA512
42ca98ac4431e05dbba789ca07b53694f3b002119f45bd3ebc119661b1de1f352d14eab468c0131ae4fe33ea0f1765f0c7afb50d04c134b8bc11f1a63697b82c

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8F3A5ED7\libcurl.dll

Filesize
218KB

MD5
d09be1f47fd6b827c81a4812b4f7296f

SHA1
028ae3596c0790e6d7f9f2f3c8e9591527d267f7

SHA256
0de53e7be51789adaec5294346220b20f793e7f8d153a3c110a92d658760697e

SHA512
857f44a1383c29208509b8f1164b6438d750d5bb4419add7626986333433e67a0d1211ec240ce9472f30a1f32b16c8097aceba4b2255641b3d8928f94237f595

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8F3A5ED7\libcurl.dll

Filesize
192KB

MD5
ea942ac06629d73c955d1d8bd8907f88

SHA1
8fc4268dc29bb1a4d72a3e32b69ccab2e5d3329e

SHA256
69b6845b1f7f5ce429924ecc68ad3c19a382eaeecae82c2bfe5b69f9c25150aa

SHA512
237ca18254a653356a0373a9b4b9339547ed30640ee9f21e80a681553815531a35409c50eaa2910573e809d47d2da2407227e68c3bfc93272e14307f2489bfad

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8F3A5ED7\libcurlpp.dll

Filesize
54KB

MD5
e6e578373c2e416289a8da55f1dc5e8e

SHA1
b601a229b66ec3d19c2369b36216c6f6eb1c063e

SHA256
43e86d650a68f1f91fa2f4375aff2720e934aa78fa3d33e06363122bf5a9535f

SHA512
9df6a8c418113a77051f6cb02745ad48c521c13cdadb85e0e37f79e29041464c8c7d7ba8c558fdd877035eb8475b6f93e7fc62b38504ddfe696a61480cabac89

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8F3A5ED7\libgcc_s_dw2-1.dll

Filesize
113KB

MD5
9aec524b616618b0d3d00b27b6f51da1

SHA1
64264300801a353db324d11738ffed876550e1d3

SHA256
59a466f77584438fc3abc0f43edc0fc99d41851726827a008841f05cfe12da7e

SHA512
0648a26940e8f4aad73b05ad53e43316dd688e5d55e293cce88267b2b8744412be2e0d507dadad830776bf715bcd819f00f5d1f7ac1c5f1c4f682fb7457a20d0

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8F3A5ED7\libstdc++-6.dll

Filesize
647KB

MD5
5e279950775baae5fea04d2cc4526bcc

SHA1
8aef1e10031c3629512c43dd8b0b5d9060878453

SHA256
97de47068327bb822b33c7106f9cbb489480901a6749513ef5c31d229dcaca87

SHA512
666325e9ed71da4955058aea31b91e2e848be43211e511865f393b7f537c208c6b31c182f7d728c2704e9fc87e7d1be3f98f5fee4d34f11c56764e1c599afd02

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8F3A5ED7\libwinpthread-1.dll

Filesize
69KB

MD5
1e0d62c34ff2e649ebc5c372065732ee

SHA1
fcfaa36ba456159b26140a43e80fbd7e9d9af2de

SHA256
509cb1d1443b623a02562ac760bced540e327c65157ffa938a22f75e38155723

SHA512
3653f8ed8ad3476632f731a3e76c6aae97898e4bf14f70007c93e53bc443906835be29f861c4a123db5b11e0f3dd5013b2b3833469a062060825df9ee708dc61

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8F3A5ED7\setup_install.exe

Filesize
287KB

MD5
3b51df78ffa71e3932aad06f0526e1db

SHA1
1d21bab4761467fcaaf12c8bb237cb679e0e704d

SHA256
5a773cc52816f6b01c91700e47aa9e7d1dd96875c29bb37493c5185658a05f61

SHA512
866cf8acc56c61e9acc44e9b4194e60d3f0813a02f46a292b06d0545dc87ec3c94bca7a82c3515a98ccc4753e6e7ffc3d3c9a69b62e5434ac79a73e3aade1525

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

Filesize
1.6MB

MD5
4f3387277ccbd6d1f21ac5c07fe4ca68

SHA1
e16506f662dc92023bf82def1d621497c8ab5890

SHA256
767a3fc4a7a6818cdc3f0b99aaa95db694f6bcde719d2057a88b3d4df3d74fac

SHA512
9da199ac69e3c0d4e0c6307e0ab8178f12cc25cb2f14c3511f6b64e6e60a925c860f3263cb38353a97b55a71ef4d27f8cb7fa3cfc08e7c1a349fd8d209dfa219

Download Submit
memory/3316-75-0x0000000000400000-0x00000000008A5000-memory.dmp

Filesize
4.6MB

Download
memory/3316-68-0x0000000000400000-0x00000000008A5000-memory.dmp

Filesize
4.6MB

Download
memory/3316-67-0x00000000009C0000-0x00000000009C9000-memory.dmp

Filesize
36KB

Download
memory/3316-66-0x0000000000B60000-0x0000000000C60000-memory.dmp

Filesize
1024KB

Download
memory/3316-77-0x00000000009C0000-0x00000000009C9000-memory.dmp

Filesize
36KB

Download
memory/3520-73-0x0000000002780000-0x0000000002795000-memory.dmp

Filesize
84KB

Download
memory/4576-47-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/4576-39-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/4576-44-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/4576-46-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/4576-48-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/4576-43-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/4576-49-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4576-50-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4576-51-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4576-52-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4576-53-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4576-54-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4576-36-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/4576-45-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/4576-60-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4576-61-0x0000000064940000-0x0000000064959000-memory.dmp

Filesize
100KB

Download
memory/4576-62-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/4576-63-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/4576-64-0x000000006EB40000-0x000000006EB63000-memory.dmp

Filesize
140KB

Download
memory/4576-65-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/4576-41-0x0000000064940000-0x0000000064959000-memory.dmp

Filesize
100KB

Download
memory/4576-42-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/4576-40-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/4576-38-0x0000000000F00000-0x0000000000F8F000-memory.dmp

Filesize
572KB

Download
memory/4576-37-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/4576-29-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/4576-22-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download