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
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4C464B54-444a-474c-4C46-4B54444A474c}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4C464B54-444a-474c-4C46-4B54444A474c}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4C464B54-444a-474c-4C46-4B54444A474c}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4C464B54-444a-474c-4C46-4B54444A474c}\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
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe	rmass.exe
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

Executes dropped EXE 2 IoCs

pid	Process
1972	rmass.exe
4028	rmass.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3268-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x000c000000023b50-5.dat	upx
behavioral2/memory/3268-7-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/1972-10-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/4028-19-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/4028-54-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/1972-53-0x0000000000400000-0x0000000000411000-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\FirewallDisableNotify = "5120"	rmass.exe
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

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 opened for modification	C:\Windows\SysWOW64\rmass.exe	63f12f4bf0e169fb16f99e02ccd4242c435e5fa4103fd96f37cce1982f200c3e.exe
File created	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\RECOVER32.DLL	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 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 created	C:\Windows\SysWOW64\ahuy.exe	rmass.exe
File created	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

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 8 IoCs

pid	Process
1972	rmass.exe
1972	rmass.exe
1972	rmass.exe
1972	rmass.exe
1972	rmass.exe
1972	rmass.exe
4028	rmass.exe
4028	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3268	63f12f4bf0e169fb16f99e02ccd4242c435e5fa4103fd96f37cce1982f200c3e.exe
Token: SeDebugPrivilege	1972	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3268 wrote to memory of 1972	3268	63f12f4bf0e169fb16f99e02ccd4242c435e5fa4103fd96f37cce1982f200c3e.exe	84
PID 3268 wrote to memory of 1972	3268	63f12f4bf0e169fb16f99e02ccd4242c435e5fa4103fd96f37cce1982f200c3e.exe	84
PID 3268 wrote to memory of 1972	3268	63f12f4bf0e169fb16f99e02ccd4242c435e5fa4103fd96f37cce1982f200c3e.exe	84
PID 1972 wrote to memory of 612	1972	rmass.exe	5
PID 1972 wrote to memory of 3456	1972	rmass.exe	56
PID 1972 wrote to memory of 4028	1972	rmass.exe	85
PID 1972 wrote to memory of 4028	1972	rmass.exe	85
PID 1972 wrote to memory of 4028	1972	rmass.exe	85

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:612

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3456
- C:\Users\Admin\AppData\Local\Temp\63f12f4bf0e169fb16f99e02ccd4242c435e5fa4103fd96f37cce1982f200c3e.exe
  "C:\Users\Admin\AppData\Local\Temp\63f12f4bf0e169fb16f99e02ccd4242c435e5fa4103fd96f37cce1982f200c3e.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3268
- - 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
    - 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:1972
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:4028

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
b89b152524c8cc6d6664891c530dcca0

SHA1
338010e37b8816b3b86885560257d3b8701a6c07

SHA256
e76e7051df62d1aa7cee8d8f67664ef11acae448bbc9c4c77832f7c57c1b66eb

SHA512
d6533bf9c2ebde013895a6612c1484de13ee5554f299c04a927d86427c5f6a0512c449109a28ffb5c4299a3e97c6f73db591fd73112d31548b43e673593b0969

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

Filesize
24KB

MD5
b04e84da3fa8bf91a7acadaaaaf807d4

SHA1
98ee2964f2ee4eba246f185383aef717e93fba16

SHA256
b0bcc1ad50b40675777a86fe0bf06def932fe051b7db1798268ccf5337cbb1c4

SHA512
b9acc2acbacae0d4c229963e0fba83b70c2c7f64a39f133dcbe383d9a14990c305e15d110eed5a4f44d254c86ad2b132e54b71b29e96d859888d1bd1b76b9ad8

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

Filesize
21KB

MD5
215b750f5dd4ae4a4719ed47d167efb8

SHA1
1bf6746df699e25a0a9bb756785f0aae7fb9ec65

SHA256
63f12f4bf0e169fb16f99e02ccd4242c435e5fa4103fd96f37cce1982f200c3e

SHA512
684ed443ffc4c86689388fbd14880e6ada066b0f04b5849952863ef5dfb5189ded342be956da3fffc04965e1a90be545a3c26217272630e2cfb4a0a8794af9d7

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/1972-10-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1972-53-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3268-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3268-7-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4028-19-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4028-54-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads