63f12f4bf0e169fb16f99e02ccd4242c435e5fa4103fd96f37cce1982f200c3e

General

Target

63f12f4bf0e169fb16f99e02ccd4242c435e5fa4103fd96f37cce1982f200c3e.exe
Size

21KB
MD5

215b750f5dd4ae4a4719ed47d167efb8
SHA1

1bf6746df699e25a0a9bb756785f0aae7fb9ec65
SHA256

63f12f4bf0e169fb16f99e02ccd4242c435e5fa4103fd96f37cce1982f200c3e
SHA512

684ed443ffc4c86689388fbd14880e6ada066b0f04b5849952863ef5dfb5189ded342be956da3fffc04965e1a90be545a3c26217272630e2cfb4a0a8794af9d7
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvX8Mb7a6y:rRkiLw3HsDSARGG/MMb7ry

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
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{51475451-5a54-5245-5147-54515A545245}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{51475451-5a54-5245-5147-54515A545245}\StubPath = "C:\\Windows\\system32\\ahuy.exe"	rmass.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{51475451-5a54-5245-5147-54515A545245}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{51475451-5a54-5245-5147-54515A545245}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	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
500	rmass.exe
3068	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
1916	63f12f4bf0e169fb16f99e02ccd4242c435e5fa4103fd96f37cce1982f200c3e.exe
1916	63f12f4bf0e169fb16f99e02ccd4242c435e5fa4103fd96f37cce1982f200c3e.exe
500	rmass.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1916-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x000c000000014228-4.dat	upx
behavioral1/memory/1916-5-0x00000000002B0000-0x00000000002C1000-memory.dmp	upx
behavioral1/memory/1916-13-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/500-14-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/3068-26-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/500-60-0x0000000000400000-0x0000000000411000-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\UpdatesDisableNotify = "5120"	rmass.exe
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

Modifies WinLogon 2 TTPs 5 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\{BC84DF00-BC38-9902-8082-6FCBF2D87A0B}\Startup = "Startup"	rmass.exe
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

Drops file in System32 directory 12 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\rmass.exe	63f12f4bf0e169fb16f99e02ccd4242c435e5fa4103fd96f37cce1982f200c3e.exe
File opened for modification	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\ahuy.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\winrnt.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\idbg32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	63f12f4bf0e169fb16f99e02ccd4242c435e5fa4103fd96f37cce1982f200c3e.exe
File created	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File created	C:\Windows\SysWOW64\ahuy.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\RECOVER32.DLL	rmass.exe
File created	C:\Windows\SysWOW64\RECOVER32.DLL	rmass.exe
File opened for modification	C:\Windows\SysWOW64\aset32.exe	rmass.exe

Drops file in Program Files directory 3 IoCs

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

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
500	rmass.exe
500	rmass.exe
500	rmass.exe
3068	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1916	63f12f4bf0e169fb16f99e02ccd4242c435e5fa4103fd96f37cce1982f200c3e.exe
Token: SeDebugPrivilege	500	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1916 wrote to memory of 500	1916	63f12f4bf0e169fb16f99e02ccd4242c435e5fa4103fd96f37cce1982f200c3e.exe	28
PID 1916 wrote to memory of 500	1916	63f12f4bf0e169fb16f99e02ccd4242c435e5fa4103fd96f37cce1982f200c3e.exe	28
PID 1916 wrote to memory of 500	1916	63f12f4bf0e169fb16f99e02ccd4242c435e5fa4103fd96f37cce1982f200c3e.exe	28
PID 1916 wrote to memory of 500	1916	63f12f4bf0e169fb16f99e02ccd4242c435e5fa4103fd96f37cce1982f200c3e.exe	28
PID 500 wrote to memory of 436	500	rmass.exe	5
PID 500 wrote to memory of 1196	500	rmass.exe	21
PID 500 wrote to memory of 3068	500	rmass.exe	29
PID 500 wrote to memory of 3068	500	rmass.exe	29
PID 500 wrote to memory of 3068	500	rmass.exe	29
PID 500 wrote to memory of 3068	500	rmass.exe	29

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:436

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1196
- C:\Users\Admin\AppData\Local\Temp\63f12f4bf0e169fb16f99e02ccd4242c435e5fa4103fd96f37cce1982f200c3e.exe
  "C:\Users\Admin\AppData\Local\Temp\63f12f4bf0e169fb16f99e02ccd4242c435e5fa4103fd96f37cce1982f200c3e.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1916
- - 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:500
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:3068

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
c4095ddfcbb19868226459412ea050cc

SHA1
7d7cd2408672bab9acaf7006c4057039160be4d3

SHA256
51bfd8126d8bf50ee0e3c495dd645cabeafa1eed2f32c29995f2fa0f224e42d3

SHA512
d91a1f4cb4dc366fb821b4fa44d7554218d0a13737a7a0516add09f1fa13ae42b368148c4a62389012e12800688026def4c7425d2a6ef93ed3a6db966f7cea35

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

Filesize
24KB

MD5
a1dbde2e05f3f39bc40f965a7f833a9c

SHA1
0727401f82800465dc1d7a5241c54917beedfc2a

SHA256
3404e8285446121265d84590d4223497206875455158beba77586d1c09521634

SHA512
d9bce3551db6291fc23ae565df4b0fb10f8c06a0aaf225e9818d86c35476f46be61fb02338cc602d05856861c62f9131db27dbdc84fe80fa22ea06a0e21b7353

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
215b750f5dd4ae4a4719ed47d167efb8

SHA1
1bf6746df699e25a0a9bb756785f0aae7fb9ec65

SHA256
63f12f4bf0e169fb16f99e02ccd4242c435e5fa4103fd96f37cce1982f200c3e

SHA512
684ed443ffc4c86689388fbd14880e6ada066b0f04b5849952863ef5dfb5189ded342be956da3fffc04965e1a90be545a3c26217272630e2cfb4a0a8794af9d7

Download Submit
memory/500-14-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/500-60-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1916-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1916-5-0x00000000002B0000-0x00000000002C1000-memory.dmp

Filesize
68KB

Download
memory/1916-13-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3068-26-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads