nullmixer | 39ec80621b9b8fcefe89e543622c4263b7629a1207107bebd239a50124bb7fc7

Analysis

max time kernel
136s
max time network
136s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
21-04-2024 19:08

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General

Target

fff7c1f77588105fc5a76b841983253f_JaffaCakes118.exe
Size

1.9MB
MD5

fff7c1f77588105fc5a76b841983253f
SHA1

c87d3d2cf8d649d9e0cd045f28d6972fc1ab9edb
SHA256

39ec80621b9b8fcefe89e543622c4263b7629a1207107bebd239a50124bb7fc7
SHA512

a23e67eb352dc383e56ad422708ea74165d294925d57b08d24d937d7bf90f6e49d5768d18f3de2cf479b57c6bd710c786e3ea4f6dc0b77851d73aab021dce6c7
SSDEEP

49152:xcBGvy10E+QMWcLctpCOOeWAbaW44EwJ84vLRaBtIl9mTRP+m+OJz:xb4MWcApaeW9FvCvLUBsKRPUkz

Score

10^/10

nullmixer aspackv2 dropper evasion trojan

Malware Config

Extracted

Family

nullmixer

http://wxkeww.xyz/

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

Processes:

karotima_1.exe

description	ioc	Process
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
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableIOAVProtection = "1"	karotima_1.exe

NullMixer
NullMixer is a malware dropper leading to an infection chain of a wide variety of malware families.
dropper nullmixer

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

rUNdlL32.eXe

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	712	556	rUNdlL32.eXe	105

ASPack v2.12-2.42 4 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

Processes:

resource	yara_rule
behavioral2/files/0x0007000000023491-18.dat	aspack_v212_v242
behavioral2/files/0x000700000002348d-24.dat	aspack_v212_v242
behavioral2/files/0x000700000002348c-32.dat	aspack_v212_v242
behavioral2/files/0x000700000002348f-35.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

Processes:

fff7c1f77588105fc5a76b841983253f_JaffaCakes118.exekarotima_2.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation	fff7c1f77588105fc5a76b841983253f_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation	karotima_2.exe

Executes dropped EXE 4 IoCs

Processes:

setup_install.exekarotima_1.exekarotima_2.exekarotima_2.exe

pid	Process
2072	setup_install.exe
1140	karotima_1.exe
2256	karotima_2.exe
2672	karotima_2.exe

Loads dropped DLL 8 IoCs

Processes:

setup_install.exerundll32.exe

pid	Process
2072	setup_install.exe
2072	setup_install.exe
2072	setup_install.exe
2072	setup_install.exe
2072	setup_install.exe
2072	setup_install.exe
2072	setup_install.exe
1192	rundll32.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.

Processes:

flow	ioc
8	ipinfo.io
7	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

Processes:

WerFault.exeWerFault.exe

pid	pid_target	Process	procid_target
3664	2072	WerFault.exe	89
2876	1192	WerFault.exe	107

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

fff7c1f77588105fc5a76b841983253f_JaffaCakes118.exesetup_install.execmd.execmd.exekarotima_2.exerUNdlL32.eXe

description	pid	Process	procid_target
PID 4324 wrote to memory of 2072	4324	fff7c1f77588105fc5a76b841983253f_JaffaCakes118.exe	89
PID 4324 wrote to memory of 2072	4324	fff7c1f77588105fc5a76b841983253f_JaffaCakes118.exe	89
PID 4324 wrote to memory of 2072	4324	fff7c1f77588105fc5a76b841983253f_JaffaCakes118.exe	89
PID 2072 wrote to memory of 2156	2072	setup_install.exe	96
PID 2072 wrote to memory of 2156	2072	setup_install.exe	96
PID 2072 wrote to memory of 2156	2072	setup_install.exe	96
PID 2072 wrote to memory of 1132	2072	setup_install.exe	97
PID 2072 wrote to memory of 1132	2072	setup_install.exe	97
PID 2072 wrote to memory of 1132	2072	setup_install.exe	97
PID 2156 wrote to memory of 1140	2156	cmd.exe	100
PID 2156 wrote to memory of 1140	2156	cmd.exe	100
PID 2156 wrote to memory of 1140	2156	cmd.exe	100
PID 1132 wrote to memory of 2256	1132	cmd.exe	101
PID 1132 wrote to memory of 2256	1132	cmd.exe	101
PID 1132 wrote to memory of 2256	1132	cmd.exe	101
PID 2256 wrote to memory of 2672	2256	karotima_2.exe	103
PID 2256 wrote to memory of 2672	2256	karotima_2.exe	103
PID 2256 wrote to memory of 2672	2256	karotima_2.exe	103
PID 712 wrote to memory of 1192	712	rUNdlL32.eXe	107
PID 712 wrote to memory of 1192	712	rUNdlL32.eXe	107
PID 712 wrote to memory of 1192	712	rUNdlL32.eXe	107

C:\Users\Admin\AppData\Local\Temp\fff7c1f77588105fc5a76b841983253f_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\fff7c1f77588105fc5a76b841983253f_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4324
- C:\Users\Admin\AppData\Local\Temp\7zS4E005237\setup_install.exe
  "C:\Users\Admin\AppData\Local\Temp\7zS4E005237\setup_install.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2072
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c karotima_1.exe
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2156
  - - C:\Users\Admin\AppData\Local\Temp\7zS4E005237\karotima_1.exe
      karotima_1.exe
      4⤵
      Modifies Windows Defender Real-time Protection settings
      Executes dropped EXE
      PID:1140
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c karotima_2.exe
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1132
  - - C:\Users\Admin\AppData\Local\Temp\7zS4E005237\karotima_2.exe
      karotima_2.exe
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Suspicious use of WriteProcessMemory
      PID:2256
    - - C:\Users\Admin\AppData\Local\Temp\7zS4E005237\karotima_2.exe
        
        "C:\Users\Admin\AppData\Local\Temp\7zS4E005237\karotima_2.exe" -a
        5⤵
        Executes dropped EXE
        
        PID:2672
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2072 -s 500
    3⤵
    - Program crash
    PID:3664

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2072 -ip 2072
1⤵
PID:2452

C:\Windows\system32\rUNdlL32.eXe
rUNdlL32.eXe "C:\Users\Admin\AppData\Local\Temp\axhub.dll",main
1⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:712
- C:\Windows\SysWOW64\rundll32.exe
  rUNdlL32.eXe "C:\Users\Admin\AppData\Local\Temp\axhub.dll",main
  2⤵
  - Loads dropped DLL
  PID:1192
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1192 -s 600
    3⤵
    - Program crash
    PID:2876

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1192 -ip 1192
1⤵
PID:4684

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\7zS4E005237\karotima_1.txt

Filesize
1014KB

MD5
953230955b0863d81f382d5163a4badc

SHA1
9c3fd08863f631a2e8aa921ff4d299105e085460

SHA256
a1d82cc7d4af1c8584f909c36b8b2cc8bd5d68791a5c9af0940e36a9887538f6

SHA512
fcc922272315876cfb71ce3b949c7838c45c3aa97860c75e55e82a2ac93ea65993cf5e0327c39cafd7a226d3fd2c72df77f9bb6c28a9dbb634c8650670b6d355

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS4E005237\karotima_2.txt

Filesize
712KB

MD5
8da953a71f7d9811e648b7644f39c445

SHA1
c39fd05d024249bc8d63493026474e797fd1eeaf

SHA256
ac6143d8ef00d3008388f0c4606bbcf9672eddde1cf76ad102ffb2db26fa6e71

SHA512
d75c871c781344968676a2c47e8c2387624d9f9aef7652b7eb97a2aebf9d474fcfe8a6f811b79a76fa4be980ccdfa8646b911e40827324800e233d390f1bcad3

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS4E005237\libcurl.dll

Filesize
218KB

MD5
d09be1f47fd6b827c81a4812b4f7296f

SHA1
028ae3596c0790e6d7f9f2f3c8e9591527d267f7

SHA256
0de53e7be51789adaec5294346220b20f793e7f8d153a3c110a92d658760697e

SHA512
857f44a1383c29208509b8f1164b6438d750d5bb4419add7626986333433e67a0d1211ec240ce9472f30a1f32b16c8097aceba4b2255641b3d8928f94237f595

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS4E005237\libcurlpp.dll

Filesize
54KB

MD5
e6e578373c2e416289a8da55f1dc5e8e

SHA1
b601a229b66ec3d19c2369b36216c6f6eb1c063e

SHA256
43e86d650a68f1f91fa2f4375aff2720e934aa78fa3d33e06363122bf5a9535f

SHA512
9df6a8c418113a77051f6cb02745ad48c521c13cdadb85e0e37f79e29041464c8c7d7ba8c558fdd877035eb8475b6f93e7fc62b38504ddfe696a61480cabac89

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS4E005237\libgcc_s_dw2-1.dll

Filesize
113KB

MD5
9aec524b616618b0d3d00b27b6f51da1

SHA1
64264300801a353db324d11738ffed876550e1d3

SHA256
59a466f77584438fc3abc0f43edc0fc99d41851726827a008841f05cfe12da7e

SHA512
0648a26940e8f4aad73b05ad53e43316dd688e5d55e293cce88267b2b8744412be2e0d507dadad830776bf715bcd819f00f5d1f7ac1c5f1c4f682fb7457a20d0

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS4E005237\libstdc++-6.dll

Filesize
647KB

MD5
5e279950775baae5fea04d2cc4526bcc

SHA1
8aef1e10031c3629512c43dd8b0b5d9060878453

SHA256
97de47068327bb822b33c7106f9cbb489480901a6749513ef5c31d229dcaca87

SHA512
666325e9ed71da4955058aea31b91e2e848be43211e511865f393b7f537c208c6b31c182f7d728c2704e9fc87e7d1be3f98f5fee4d34f11c56764e1c599afd02

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS4E005237\libwinpthread-1.dll

Filesize
69KB

MD5
1e0d62c34ff2e649ebc5c372065732ee

SHA1
fcfaa36ba456159b26140a43e80fbd7e9d9af2de

SHA256
509cb1d1443b623a02562ac760bced540e327c65157ffa938a22f75e38155723

SHA512
3653f8ed8ad3476632f731a3e76c6aae97898e4bf14f70007c93e53bc443906835be29f861c4a123db5b11e0f3dd5013b2b3833469a062060825df9ee708dc61

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zS4E005237\setup_install.exe

Filesize
290KB

MD5
4cb1e9abef374ec0a5276b394d1162ba

SHA1
1c7f909d77a4adc1f5a0c6badcd06c2de2b07bba

SHA256
ad427a15485ff30869db848aacceb35e49220ff21c5f894c2f775a06758bf2da

SHA512
07d0763eabb90fdbd9f065f1ace27021d3ad82305aa55513575e07a0fff45a5849ce97ca05bc10ab1bd7b30dfb7f8e8b722f464cb0da4dba7850d98bf9268cb7

Download Submit
C:\Users\Admin\AppData\Local\Temp\axhub.dat

Filesize
552KB

MD5
c5c411ddf0d0dd87bc6fdb84975fc292

SHA1
e04d41c06a12d46c5ba8220509d89d2a66140892

SHA256
dc16f2dadacfad74d074a70c060bafc95d49a7d08a1cbe24f35ddb1769fb56da

SHA512
9ed2af8bef3a1873efefb048c3e2733e994bf6300bdfb06ea12939450e65abfa19b4753a1e0755a755a8aed10398982c737d33b9fa79f91ffa356ef4ce20109b

Download Submit
C:\Users\Admin\AppData\Local\Temp\axhub.dll

Filesize
73KB

MD5
1c7be730bdc4833afb7117d48c3fd513

SHA1
dc7e38cfe2ae4a117922306aead5a7544af646b8

SHA256
8206b4b3897ca45b9e083273f616902966e57091516844906e6ae2aefe63cef1

SHA512
7936c862a06b7ecdb6710a1bb62cbea149f75504b580c2f100945674c987f3eec53e9aa5915e32b4f74bcf46f2df9468f68a454400faebd909f933e8072e0f2e

Download Submit
memory/2072-43-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/2072-52-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/2072-38-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/2072-45-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/2072-44-0x0000000064940000-0x0000000064959000-memory.dmp

Filesize
100KB

Download
memory/2072-42-0x00000000007A0000-0x000000000082F000-memory.dmp

Filesize
572KB

Download
memory/2072-47-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/2072-46-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/2072-40-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/2072-48-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/2072-49-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/2072-50-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/2072-51-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/2072-41-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/2072-53-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/2072-54-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/2072-36-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/2072-22-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/2072-64-0x0000000000400000-0x000000000051E000-memory.dmp

Filesize
1.1MB

Download
memory/2072-65-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/2072-66-0x0000000064940000-0x0000000064959000-memory.dmp

Filesize
100KB

Download
memory/2072-67-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download
memory/2072-68-0x000000006EB40000-0x000000006EB63000-memory.dmp

Filesize
140KB

Download
memory/2072-69-0x000000006FE40000-0x000000006FFC6000-memory.dmp

Filesize
1.5MB

Download
memory/2072-39-0x000000006B280000-0x000000006B2A6000-memory.dmp

Filesize
152KB

Download
memory/2072-37-0x000000006B440000-0x000000006B4CF000-memory.dmp

Filesize
572KB

Download