nullmixer | e270a47e3c09fe00dd072297302d96b830682e18214cb7410be4d56f6feb0dd0

Analysis

max time kernel
150s
max time network
155s
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

setup_installer.exe
Size

1.5MB
MD5

d9ff1676cb62a8cd8cf24bb2c5a3d8e3
SHA1

d8f2ccdf1e3feb18f726ccd35f8f80611a8b019e
SHA256

abe3c1a4d337159c98b15959921d18f0f28add956f482c703cb5609c2656c630
SHA512

215812b82cf4e5c00132538d4f1e3447294633ae08d9626d85730d99ba9e401a3f9843890f82506fd45c57b89ebda51c3efa7ef4c0f29ddea175c8a32f181e5a
SSDEEP

24576:xcVkKSkXCeomdCFDWHp/7F82BzWTpEPY/RQ5DsvLwcaBhdZIl9mToWznWFJpJYqu:xcB3CpZgu2BCFEwJ84vLRaBtIl9mTo8/

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 5 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

resource	yara_rule
behavioral4/files/0x0007000000023209-18.dat	aspack_v212_v242
behavioral4/files/0x0007000000023204-27.dat	aspack_v212_v242
behavioral4/files/0x0007000000023205-25.dat	aspack_v212_v242
behavioral4/files/0x0007000000023207-34.dat	aspack_v212_v242
behavioral4/files/0x0007000000023207-33.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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	setup_installer.exe

Executes dropped EXE 3 IoCs

pid	Process
4860	setup_install.exe
4476	karotima_1.exe
4184	karotima_2.exe

Loads dropped DLL 6 IoCs

pid	Process
4860	setup_install.exe
4860	setup_install.exe
4860	setup_install.exe
4860	setup_install.exe
4860	setup_install.exe
4184	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
15	ipinfo.io
21	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
1368	4860	WerFault.exe	88
5068	4184	WerFault.exe	96

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
4184	karotima_2.exe
4184	karotima_2.exe
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found
3392	Process not Found

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4184	karotima_2.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeShutdownPrivilege	3392	Process not Found
Token: SeCreatePagefilePrivilege	3392	Process not Found

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
3392	Process not Found

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2296 wrote to memory of 4860	2296	setup_installer.exe	88
PID 2296 wrote to memory of 4860	2296	setup_installer.exe	88
PID 2296 wrote to memory of 4860	2296	setup_installer.exe	88
PID 4860 wrote to memory of 2236	4860	setup_install.exe	94
PID 4860 wrote to memory of 2236	4860	setup_install.exe	94
PID 4860 wrote to memory of 2236	4860	setup_install.exe	94
PID 4860 wrote to memory of 4176	4860	setup_install.exe	95
PID 4860 wrote to memory of 4176	4860	setup_install.exe	95
PID 4860 wrote to memory of 4176	4860	setup_install.exe	95
PID 4176 wrote to memory of 4184	4176	cmd.exe	96
PID 4176 wrote to memory of 4184	4176	cmd.exe	96
PID 4176 wrote to memory of 4184	4176	cmd.exe	96
PID 2236 wrote to memory of 4476	2236	cmd.exe	97
PID 2236 wrote to memory of 4476	2236	cmd.exe	97
PID 2236 wrote to memory of 4476	2236	cmd.exe	97

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:2296
- C:\Users\Admin\AppData\Local\Temp\7zS8F858E67\setup_install.exe
  "C:\Users\Admin\AppData\Local\Temp\7zS8F858E67\setup_install.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:4860
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c karotima_1.exe
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2236
  - - C:\Users\Admin\AppData\Local\Temp\7zS8F858E67\karotima_1.exe
      karotima_1.exe
      4⤵
      Modifies Windows Defender Real-time Protection settings
      Executes dropped EXE
      PID:4476
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c karotima_2.exe
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4176
  - - C:\Users\Admin\AppData\Local\Temp\7zS8F858E67\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:4184
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4184 -s 396
        5⤵
        Program crash
        
        PID:5068
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4860 -s 504
    3⤵
    - Program crash
    PID:1368

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4860 -ip 4860
1⤵
PID:4516

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 4184 -ip 4184
1⤵
PID:464

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\7zS8F858E67\karotima_1.txt

Filesize
1.0MB

MD5
9108ad5775c76cccbb4eadf02de24f5d

SHA1
82996bc4f72b3234536d0b58630d5d26bcf904b0

SHA256
c9d5525b2f2b76087121039ee1c23ed35508e60f653479722ec64ea3a064878e

SHA512
19021a28555bba1fe1bdcdc8845f1bcadebd256c7db02b9329d6b44ae01a123a00e162cc34a97ba51f088cafa6f54ab1de8f82f771ac54b94a3a796f84f73362

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8F858E67\karotima_2.txt

Filesize
201KB

MD5
7e3cb6bf4000e17ada2121b84b63ddc1

SHA1
3d9d09e4603b89913b0eca604021df3c49b4aa31

SHA256
439c74d75423ffb0071e342f248c48567f50f50e1f836ae119f5db1387147188

SHA512
0989ca525843ca03ebfb32b1f000307e7be9674b7453c7a8724f2206028e9ecc04b9f2ef130639858041d37a2b7a11d7e9b1e23197f22bb0e95f9d6f75291ebf

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8F858E67\libcurl.dll

Filesize
218KB

MD5
d09be1f47fd6b827c81a4812b4f7296f

SHA1
028ae3596c0790e6d7f9f2f3c8e9591527d267f7

SHA256
0de53e7be51789adaec5294346220b20f793e7f8d153a3c110a92d658760697e

SHA512
857f44a1383c29208509b8f1164b6438d750d5bb4419add7626986333433e67a0d1211ec240ce9472f30a1f32b16c8097aceba4b2255641b3d8928f94237f595

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8F858E67\libcurlpp.dll

Filesize
54KB

MD5
e6e578373c2e416289a8da55f1dc5e8e

SHA1
b601a229b66ec3d19c2369b36216c6f6eb1c063e

SHA256
43e86d650a68f1f91fa2f4375aff2720e934aa78fa3d33e06363122bf5a9535f

SHA512
9df6a8c418113a77051f6cb02745ad48c521c13cdadb85e0e37f79e29041464c8c7d7ba8c558fdd877035eb8475b6f93e7fc62b38504ddfe696a61480cabac89

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8F858E67\libgcc_s_dw2-1.dll

Filesize
113KB

MD5
9aec524b616618b0d3d00b27b6f51da1

SHA1
64264300801a353db324d11738ffed876550e1d3

SHA256
59a466f77584438fc3abc0f43edc0fc99d41851726827a008841f05cfe12da7e

SHA512
0648a26940e8f4aad73b05ad53e43316dd688e5d55e293cce88267b2b8744412be2e0d507dadad830776bf715bcd819f00f5d1f7ac1c5f1c4f682fb7457a20d0

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8F858E67\libstdc++-6.dll

Filesize
583KB

MD5
f183843e1870b3e25ddc04e5a715a927

SHA1
4eda935ad92cccba72fc5ddc1d2f4ef206055e40

SHA256
0b2430a607745753fed9a54ade7007d646ec04d3c0f249d1797bf2d0d337c740

SHA512
b9a4acaf926fb24726be6a23423c37441a643947cd1d801707a9a6976d75f80538aefdec6fa56181e46e4ba9f19178ec42ffa6a9c46ad800088c6e30ebb841c0

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8F858E67\libstdc++-6.dll

Filesize
518KB

MD5
a8b390a08fb5bf6c1f33a71291b9d04c

SHA1
6868a5eefd11b07f260a32cce8dbd7e6143d1890

SHA256
ce2705906f3dc516b17856c3fb37d6ebb35647f33e1f2f44f1c0b0698f7a87ef

SHA512
7ea45f94d253e27b2046c2808ee35323cb0afb4d2e447165e83d8b1eaa11fce634eee571837b939a7140d262bc45886558a636d0f3ce770997643f988aa5ef81

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8F858E67\libwinpthread-1.dll

Filesize
69KB

MD5
1e0d62c34ff2e649ebc5c372065732ee

SHA1
fcfaa36ba456159b26140a43e80fbd7e9d9af2de

SHA256
509cb1d1443b623a02562ac760bced540e327c65157ffa938a22f75e38155723

SHA512
3653f8ed8ad3476632f731a3e76c6aae97898e4bf14f70007c93e53bc443906835be29f861c4a123db5b11e0f3dd5013b2b3833469a062060825df9ee708dc61

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS8F858E67\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
memory/3392-71-0x00000000021A0000-0x00000000021B5000-memory.dmp

Filesize
84KB

Download
memory/4184-70-0x0000000000400000-0x000000000089C000-memory.dmp

Filesize
4.6MB

Download
memory/4184-65-0x00000000008A0000-0x00000000008A9000-memory.dmp

Filesize
36KB

Download
memory/4184-64-0x00000000008B0000-0x00000000009B0000-memory.dmp

Filesize
1024KB

Download
memory/4184-74-0x0000000000400000-0x000000000089C000-memory.dmp

Filesize
4.6MB

Download
memory/4184-75-0x00000000008A0000-0x00000000008A9000-memory.dmp

Filesize
36KB

Download
memory/4860-50-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4860-58-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4860-40-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/4860-46-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/4860-44-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/4860-52-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4860-51-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4860-49-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4860-48-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4860-47-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/4860-45-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/4860-42-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/4860-41-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/4860-43-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/4860-59-0x0000000064940000-0x0000000064959000-memory.dmp

Filesize
100KB

Download
memory/4860-60-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/4860-61-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/4860-62-0x000000006EB40000-0x000000006EB63000-memory.dmp

Filesize
140KB

Download
memory/4860-63-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/4860-39-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/4860-31-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/4860-36-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/4860-37-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/4860-38-0x0000000064940000-0x0000000064959000-memory.dmp

Filesize
100KB

Download
memory/4860-35-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/4860-22-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download