6a96053a428452d0e03f2462b16265816c5b37042a81205812d6ea412f916ed6

General

Target

6a96053a428452d0e03f2462b16265816c5b37042a81205812d6ea412f916ed6.exe
Size

21KB
MD5

a09d4a606443ecbee935532ae68954f0
SHA1

8a551e63708d2e0855d07b1b7c3e1c543ba0141a
SHA256

6a96053a428452d0e03f2462b16265816c5b37042a81205812d6ea412f916ed6
SHA512

3990709f2ff65d10ffdf60ad4a1f09fda9154d49f849988a6adc608af81762d22d32498c7dcca3811478c8e12b75200a2d27c67c2ddf0f532427c8f2b3e6455c
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvX8Mb7a67:rRkiLw3HsDSARGG/MMb7r7

Score

10^/10

evasion persistence trojan upx

Malware Config

Signatures

Windows security bypass 2 TTPs 4 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "5120"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "5120"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "5120"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "5120"	rmass.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	rmass.exe

Modifies Installed Components in the registry 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{50554D41-5254-4e52-5055-4D4152544e52}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{50554D41-5254-4e52-5055-4D4152544e52}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{50554D41-5254-4e52-5055-4D4152544e52}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{50554D41-5254-4e52-5055-4D4152544e52}\StubPath = "C:\\Windows\\system32\\ahuy.exe"	rmass.exe

Sets file execution options in registry 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe\0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890 = "a"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe\Debugger = "C:\\Windows\\system32\\ntdbg.exe"	rmass.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe	rmass.exe

Executes dropped EXE 2 IoCs

pid	Process
2996	rmass.exe
2692	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
2556	6a96053a428452d0e03f2462b16265816c5b37042a81205812d6ea412f916ed6.exe
2556	6a96053a428452d0e03f2462b16265816c5b37042a81205812d6ea412f916ed6.exe
2996	rmass.exe

UPX packed file 7 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2556-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x000a000000012289-4.dat	upx
behavioral1/memory/2556-12-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2996-13-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2996-59-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2692-60-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2996-99-0x0000000000380000-0x0000000000391000-memory.dmp	upx

Windows security modification 2 TTPs 4 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "5120"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "5120"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "5120"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "5120"	rmass.exe

Modifies WinLogon 2 TTPs 5 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\{BC84DF00-BC38-9902-8082-6FCBF2D87A0B}	rmass.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\{BC84DF00-BC38-9902-8082-6FCBF2D87A0B}\012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345 = "a"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\{BC84DF00-BC38-9902-8082-6FCBF2D87A0B}\DLLName = "C:\\Windows\\system32\\RECOVER32.DLL"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\{BC84DF00-BC38-9902-8082-6FCBF2D87A0B}\Startup = "Startup"	rmass.exe

Drops file in System32 directory 12 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\ahuy.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\RECOVER32.DLL	rmass.exe
File opened for modification	C:\Windows\SysWOW64\winrnt.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\aset32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\idbg32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	6a96053a428452d0e03f2462b16265816c5b37042a81205812d6ea412f916ed6.exe
File created	C:\Windows\SysWOW64\rmass.exe	6a96053a428452d0e03f2462b16265816c5b37042a81205812d6ea412f916ed6.exe
File opened for modification	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File created	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\ahuy.exe	rmass.exe
File created	C:\Windows\SysWOW64\RECOVER32.DLL	rmass.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\System\aset32.exe	rmass.exe
File opened for modification	C:\Program Files (x86)\Common Files\System\idbg32.exe	rmass.exe
File opened for modification	C:\Program Files (x86)\Common Files\System\winrnt.exe	rmass.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2996	rmass.exe
2996	rmass.exe
2996	rmass.exe
2692	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2556	6a96053a428452d0e03f2462b16265816c5b37042a81205812d6ea412f916ed6.exe
Token: SeDebugPrivilege	2996	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2556 wrote to memory of 2996	2556	6a96053a428452d0e03f2462b16265816c5b37042a81205812d6ea412f916ed6.exe	28
PID 2556 wrote to memory of 2996	2556	6a96053a428452d0e03f2462b16265816c5b37042a81205812d6ea412f916ed6.exe	28
PID 2556 wrote to memory of 2996	2556	6a96053a428452d0e03f2462b16265816c5b37042a81205812d6ea412f916ed6.exe	28
PID 2556 wrote to memory of 2996	2556	6a96053a428452d0e03f2462b16265816c5b37042a81205812d6ea412f916ed6.exe	28
PID 2996 wrote to memory of 428	2996	rmass.exe	5
PID 2996 wrote to memory of 1168	2996	rmass.exe	21
PID 2996 wrote to memory of 2692	2996	rmass.exe	29
PID 2996 wrote to memory of 2692	2996	rmass.exe	29
PID 2996 wrote to memory of 2692	2996	rmass.exe	29
PID 2996 wrote to memory of 2692	2996	rmass.exe	29

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:428

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1168
- C:\Users\Admin\AppData\Local\Temp\6a96053a428452d0e03f2462b16265816c5b37042a81205812d6ea412f916ed6.exe
  "C:\Users\Admin\AppData\Local\Temp\6a96053a428452d0e03f2462b16265816c5b37042a81205812d6ea412f916ed6.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2556
- - C:\Windows\SysWOW64\rmass.exe
    "C:\Windows\system32\rmass.exe"
    3⤵
    - Windows security bypass
    - Drops file in Drivers directory
    - Modifies Installed Components in the registry
    - Sets file execution options in registry
    - Executes dropped EXE
    - Loads dropped DLL
    - Windows security modification
    - Modifies WinLogon
    - Drops file in System32 directory
    - Drops file in Program Files directory
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2996
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2692

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

3

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

3

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Impair Defenses

2

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\RECOVER32.DLL

Filesize
5KB

MD5
2b2c28a7a01f9584fe220ef84003427f

SHA1
5fc023df0b5064045eb8de7f2dbe26f07f6fec70

SHA256
9e00af53b1d0c0f5270d94a666d95aa7b4dcb9fea49487c210c055c9dcfcc9eb

SHA512
39192a8a91dec1abff25af8dac0cf39da4dfd51b3fb4f1ef0b4e776185d4280fbe8387c2ea778da7bbf2ce288b0bce4d23cbe8d9e87bbd250159044f5adbac78

Download Submit
C:\Windows\SysWOW64\ahuy.exe

Filesize
23KB

MD5
b325ab992c60bfbda5c313adb0deec11

SHA1
830d3a1ed97af1bc4f815668b87d6b3115f4afd3

SHA256
6579b2f774956474231814a14d4a4cdc5fc70c2631462e0fff287fc6be45d22e

SHA512
24286e0ecd16f1baf38d911b358950372cfa5e81e700933e08c17e22bb9a7ed089cc1b8ce191a344bb6ea76087484932353621fcd736287ebf200785020e2706

Download Submit
C:\Windows\SysWOW64\ntdbg.exe

Filesize
24KB

MD5
9ceabd2fa59a3ce45a3d0d595f1d1907

SHA1
4d164ffcef2932a2b6744866e579af9e74e7a595

SHA256
0eb14fe7969be1a9f31313099afe7e253e9dd5e0c2191e39a70e724974ed558f

SHA512
3fd9401c89ef4b067d76bc42278680817502fc8a1bcd3a3b1482df6cc3da4cf0e3228065d2c692494101ce8d1ce9021d0258b705dfbc19c776bce7dca006c77f

Download Submit
C:\Windows\System32\drivers\etc\hosts

Filesize
1KB

MD5
b10b13206b0f2cf3968050072f6979bf

SHA1
699db21ba9cecf3f13ac3d76e22cfa41aa94da80

SHA256
0eef3217095cb97b695c434e74d6314bf9e869a013d6e9c88e58c34576a276b4

SHA512
d33bfd931be6676539507a69101d99fa4c5ef36b12422bd11f063b9b6a47b7444f6c4ad5f35e044714fdb872e96cd9fddf049e8329af1219483887f6ac5f4a5d

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
21KB

MD5
a09d4a606443ecbee935532ae68954f0

SHA1
8a551e63708d2e0855d07b1b7c3e1c543ba0141a

SHA256
6a96053a428452d0e03f2462b16265816c5b37042a81205812d6ea412f916ed6

SHA512
3990709f2ff65d10ffdf60ad4a1f09fda9154d49f849988a6adc608af81762d22d32498c7dcca3811478c8e12b75200a2d27c67c2ddf0f532427c8f2b3e6455c

Download Submit
memory/2556-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2556-12-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2692-60-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2996-13-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2996-25-0x0000000000380000-0x0000000000391000-memory.dmp

Filesize
68KB

Download
memory/2996-59-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2996-99-0x0000000000380000-0x0000000000391000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads