nullmixer | e270a47e3c09fe00dd072297302d96b830682e18214cb7410be4d56f6feb0dd0

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
14-03-2024 19:34

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General

Target

c9705afcbe13766eedfe83cd901a1cd2.exe
Size

1.5MB
MD5

c9705afcbe13766eedfe83cd901a1cd2
SHA1

5f0a179c3a72744d8e7d16aedebaf5c000b2c019
SHA256

e270a47e3c09fe00dd072297302d96b830682e18214cb7410be4d56f6feb0dd0
SHA512

d34efb1d0f2ef24e277914e292cc09e753f4ca0e9e6189d7163e9932062f4fe2259b180a29ed9d2d5fa3486b3f4e1f2c7e40cf11b7a385562f72534b35f3a53e
SSDEEP

24576:Eg5Qr587v2TIC7sQpnVBf9QQMfcflspnr1+dReMQfOtzan2WnbSXqmndlLMV44gT:EgirovmIm/VhMfcfepnPfgJWn2fPLI6T

Score

10^/10

nullmixer smokeloader pub6 aspackv2 backdoor dropper evasion trojan

Malware Config

Extracted

Family

nullmixer

http://wxkeww.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\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
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

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/0x0007000000023244-30.dat	aspack_v212_v242
behavioral2/files/0x000700000002323f-38.dat	aspack_v212_v242
behavioral2/files/0x0007000000023240-39.dat	aspack_v212_v242
behavioral2/files/0x0007000000023242-42.dat	aspack_v212_v242

Checks computer location settings 2 TTPs 2 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-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	c9705afcbe13766eedfe83cd901a1cd2.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	setup_installer.exe

Executes dropped EXE 4 IoCs

pid	Process
4068	setup_installer.exe
2816	setup_install.exe
8	karotima_1.exe
3724	karotima_2.exe

Loads dropped DLL 8 IoCs

pid	Process
2816	setup_install.exe
2816	setup_install.exe
2816	setup_install.exe
2816	setup_install.exe
2816	setup_install.exe
2816	setup_install.exe
2816	setup_install.exe
3724	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
15	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
1208	2816	WerFault.exe	91
4300	3724	WerFault.exe	98

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

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3724	karotima_2.exe
3724	karotima_2.exe
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found
3460	Process not Found

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3724	karotima_2.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeShutdownPrivilege	3460	Process not Found
Token: SeCreatePagefilePrivilege	3460	Process not Found

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
3460	Process not Found

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1684 wrote to memory of 4068	1684	c9705afcbe13766eedfe83cd901a1cd2.exe	89
PID 1684 wrote to memory of 4068	1684	c9705afcbe13766eedfe83cd901a1cd2.exe	89
PID 1684 wrote to memory of 4068	1684	c9705afcbe13766eedfe83cd901a1cd2.exe	89
PID 4068 wrote to memory of 2816	4068	setup_installer.exe	91
PID 4068 wrote to memory of 2816	4068	setup_installer.exe	91
PID 4068 wrote to memory of 2816	4068	setup_installer.exe	91
PID 2816 wrote to memory of 2516	2816	setup_install.exe	96
PID 2816 wrote to memory of 2516	2816	setup_install.exe	96
PID 2816 wrote to memory of 2516	2816	setup_install.exe	96
PID 2816 wrote to memory of 1504	2816	setup_install.exe	97
PID 2816 wrote to memory of 1504	2816	setup_install.exe	97
PID 2816 wrote to memory of 1504	2816	setup_install.exe	97
PID 1504 wrote to memory of 3724	1504	cmd.exe	98
PID 1504 wrote to memory of 3724	1504	cmd.exe	98
PID 1504 wrote to memory of 3724	1504	cmd.exe	98
PID 2516 wrote to memory of 8	2516	cmd.exe	99
PID 2516 wrote to memory of 8	2516	cmd.exe	99
PID 2516 wrote to memory of 8	2516	cmd.exe	99

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\c9705afcbe13766eedfe83cd901a1cd2.exe
"C:\Users\Admin\AppData\Local\Temp\c9705afcbe13766eedfe83cd901a1cd2.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1684
- C:\Users\Admin\AppData\Local\Temp\setup_installer.exe
  "C:\Users\Admin\AppData\Local\Temp\setup_installer.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:4068
- - C:\Users\Admin\AppData\Local\Temp\7zS4EFFBE47\setup_install.exe
    "C:\Users\Admin\AppData\Local\Temp\7zS4EFFBE47\setup_install.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:2816
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c karotima_1.exe
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2516
    - - C:\Users\Admin\AppData\Local\Temp\7zS4EFFBE47\karotima_1.exe
        
        karotima_1.exe
        5⤵
        Modifies Windows Defender Real-time Protection settings
        Executes dropped EXE
        
        PID:8
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c karotima_2.exe
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1504
    - - C:\Users\Admin\AppData\Local\Temp\7zS4EFFBE47\karotima_2.exe
        
        karotima_2.exe
        5⤵
        Executes dropped EXE
        Loads dropped DLL
        Checks SCSI registry key(s)
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: MapViewOfSection
        
        PID:3724
      - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3724 -s 396
        6⤵
        Program crash
        
        PID:4300
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2816 -s 420
      4⤵
      Program crash
      PID:1208

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 2816 -ip 2816
1⤵
PID:4708

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 3724 -ip 3724
1⤵
PID:4296

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\7zS4EFFBE47\karotima_1.txt

Filesize
1.0MB

MD5
9108ad5775c76cccbb4eadf02de24f5d

SHA1
82996bc4f72b3234536d0b58630d5d26bcf904b0

SHA256
c9d5525b2f2b76087121039ee1c23ed35508e60f653479722ec64ea3a064878e

SHA512
19021a28555bba1fe1bdcdc8845f1bcadebd256c7db02b9329d6b44ae01a123a00e162cc34a97ba51f088cafa6f54ab1de8f82f771ac54b94a3a796f84f73362

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS4EFFBE47\karotima_2.txt

Filesize
201KB

MD5
7e3cb6bf4000e17ada2121b84b63ddc1

SHA1
3d9d09e4603b89913b0eca604021df3c49b4aa31

SHA256
439c74d75423ffb0071e342f248c48567f50f50e1f836ae119f5db1387147188

SHA512
0989ca525843ca03ebfb32b1f000307e7be9674b7453c7a8724f2206028e9ecc04b9f2ef130639858041d37a2b7a11d7e9b1e23197f22bb0e95f9d6f75291ebf

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS4EFFBE47\libcurl.dll

Filesize
218KB

MD5
d09be1f47fd6b827c81a4812b4f7296f

SHA1
028ae3596c0790e6d7f9f2f3c8e9591527d267f7

SHA256
0de53e7be51789adaec5294346220b20f793e7f8d153a3c110a92d658760697e

SHA512
857f44a1383c29208509b8f1164b6438d750d5bb4419add7626986333433e67a0d1211ec240ce9472f30a1f32b16c8097aceba4b2255641b3d8928f94237f595

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS4EFFBE47\libcurlpp.dll

Filesize
54KB

MD5
e6e578373c2e416289a8da55f1dc5e8e

SHA1
b601a229b66ec3d19c2369b36216c6f6eb1c063e

SHA256
43e86d650a68f1f91fa2f4375aff2720e934aa78fa3d33e06363122bf5a9535f

SHA512
9df6a8c418113a77051f6cb02745ad48c521c13cdadb85e0e37f79e29041464c8c7d7ba8c558fdd877035eb8475b6f93e7fc62b38504ddfe696a61480cabac89

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS4EFFBE47\libgcc_s_dw2-1.dll

Filesize
113KB

MD5
9aec524b616618b0d3d00b27b6f51da1

SHA1
64264300801a353db324d11738ffed876550e1d3

SHA256
59a466f77584438fc3abc0f43edc0fc99d41851726827a008841f05cfe12da7e

SHA512
0648a26940e8f4aad73b05ad53e43316dd688e5d55e293cce88267b2b8744412be2e0d507dadad830776bf715bcd819f00f5d1f7ac1c5f1c4f682fb7457a20d0

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS4EFFBE47\libstdc++-6.dll

Filesize
647KB

MD5
5e279950775baae5fea04d2cc4526bcc

SHA1
8aef1e10031c3629512c43dd8b0b5d9060878453

SHA256
97de47068327bb822b33c7106f9cbb489480901a6749513ef5c31d229dcaca87

SHA512
666325e9ed71da4955058aea31b91e2e848be43211e511865f393b7f537c208c6b31c182f7d728c2704e9fc87e7d1be3f98f5fee4d34f11c56764e1c599afd02

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS4EFFBE47\libwinpthread-1.dll

Filesize
69KB

MD5
1e0d62c34ff2e649ebc5c372065732ee

SHA1
fcfaa36ba456159b26140a43e80fbd7e9d9af2de

SHA256
509cb1d1443b623a02562ac760bced540e327c65157ffa938a22f75e38155723

SHA512
3653f8ed8ad3476632f731a3e76c6aae97898e4bf14f70007c93e53bc443906835be29f861c4a123db5b11e0f3dd5013b2b3833469a062060825df9ee708dc61

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS4EFFBE47\setup_install.exe

Filesize
287KB

MD5
117e1a64b0ccd2b5a68a3b5e65fb901b

SHA1
11b8fdef6a1f49d132d39bbad6fe9c6bbd7deb5a

SHA256
72a4d83686943a9436736bf25a88af512e83b6a8c984e83a64d18cac674e7e24

SHA512
035d7f48480198f16df3f2cb8d65f16d0df0bbf7f3a3b57f5dd5a485569e4f52446e993db264ab64053c44a6a1be8683287ae69166ff822a6410e345247ebdc7

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

Filesize
1.6MB

MD5
4f3387277ccbd6d1f21ac5c07fe4ca68

SHA1
e16506f662dc92023bf82def1d621497c8ab5890

SHA256
767a3fc4a7a6818cdc3f0b99aaa95db694f6bcde719d2057a88b3d4df3d74fac

SHA512
9da199ac69e3c0d4e0c6307e0ab8178f12cc25cb2f14c3511f6b64e6e60a925c860f3263cb38353a97b55a71ef4d27f8cb7fa3cfc08e7c1a349fd8d209dfa219

Download Submit
C:\Users\Admin\AppData\Local\Temp\setup_installer.exe

Filesize
1.5MB

MD5
d9ff1676cb62a8cd8cf24bb2c5a3d8e3

SHA1
d8f2ccdf1e3feb18f726ccd35f8f80611a8b019e

SHA256
abe3c1a4d337159c98b15959921d18f0f28add956f482c703cb5609c2656c630

SHA512
215812b82cf4e5c00132538d4f1e3447294633ae08d9626d85730d99ba9e401a3f9843890f82506fd45c57b89ebda51c3efa7ef4c0f29ddea175c8a32f181e5a

Download Submit
memory/2816-60-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/2816-65-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/2816-51-0x0000000000EF0000-0x0000000000F7F000-memory.dmp

Filesize
572KB

Download
memory/2816-55-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/2816-56-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/2816-57-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/2816-54-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/2816-48-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/2816-58-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/2816-59-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/2816-52-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/2816-61-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/2816-62-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/2816-63-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/2816-64-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/2816-53-0x0000000064940000-0x0000000064959000-memory.dmp

Filesize
100KB

Download
memory/2816-66-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/2816-50-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/2816-49-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/2816-72-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/2816-73-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/2816-75-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/2816-77-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/2816-76-0x000000006EB40000-0x000000006EB63000-memory.dmp

Filesize
140KB

Download
memory/2816-74-0x0000000064940000-0x0000000064959000-memory.dmp

Filesize
100KB

Download
memory/2816-78-0x0000000000EF0000-0x0000000000F7F000-memory.dmp

Filesize
572KB

Download
memory/2816-34-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/3460-86-0x0000000002FD0000-0x0000000002FE5000-memory.dmp

Filesize
84KB

Download
memory/3724-85-0x0000000000400000-0x000000000089C000-memory.dmp

Filesize
4.6MB

Download
memory/3724-84-0x00000000001D0000-0x00000000001D9000-memory.dmp

Filesize
36KB

Download
memory/3724-80-0x0000000000930000-0x0000000000A30000-memory.dmp

Filesize
1024KB

Download
memory/3724-89-0x0000000000400000-0x000000000089C000-memory.dmp

Filesize
4.6MB

Download