2549370a764d632dd587ed5fff9071f19ae430ce909f383b74cfac70d5422435

General

Target

virussign.com_0cc00487cd4d1de76ca624061f694a30.exe
Size

44KB
MD5

0cc00487cd4d1de76ca624061f694a30
SHA1

dcc5cab635d1c1e17f43df850c7da10904465de2
SHA256

2549370a764d632dd587ed5fff9071f19ae430ce909f383b74cfac70d5422435
SHA512

4f725dcf6f5988c13935c8b6cd3981a218f2b696a5fd3b622c10270a02127b7e805368b272468bcfe954adda48ea3d099f8b5a6f36ba96de8dbb0827af535c09
SSDEEP

768:WAUJmQCcmLCXQq6fsKiJYsIkjJVzqsVG5kuGVAQvKMb7r6:RUNHFKQbIkHvGkAFu7+

Score

10^/10

evasion persistence trojan

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\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

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\{4C4C5844-4845-5743-4C4C-584448455743}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4C4C5844-4845-5743-4C4C-584448455743}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4C4C5844-4845-5743-4C4C-584448455743}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4C4C5844-4845-5743-4C4C-584448455743}\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\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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe\0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890 = "a"	rmass.exe

Executes dropped EXE 2 IoCs

pid	Process
760	rmass.exe
2016	rmass.exe

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\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
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "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	virussign.com_0cc00487cd4d1de76ca624061f694a30.exe
File created	C:\Windows\SysWOW64\rmass.exe	virussign.com_0cc00487cd4d1de76ca624061f694a30.exe
File opened for modification	C:\Windows\SysWOW64\ahuy.exe	rmass.exe
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\ntdbg.exe	rmass.exe
File created	C:\Windows\SysWOW64\ntdbg.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
File opened for modification	C:\Windows\SysWOW64\idbg32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.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\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 8 IoCs

pid	Process
760	rmass.exe
760	rmass.exe
760	rmass.exe
760	rmass.exe
760	rmass.exe
760	rmass.exe
2016	rmass.exe
2016	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4052	virussign.com_0cc00487cd4d1de76ca624061f694a30.exe
Token: SeDebugPrivilege	760	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4052 wrote to memory of 760	4052	virussign.com_0cc00487cd4d1de76ca624061f694a30.exe	82
PID 4052 wrote to memory of 760	4052	virussign.com_0cc00487cd4d1de76ca624061f694a30.exe	82
PID 4052 wrote to memory of 760	4052	virussign.com_0cc00487cd4d1de76ca624061f694a30.exe	82
PID 760 wrote to memory of 2016	760	rmass.exe	83
PID 760 wrote to memory of 2016	760	rmass.exe	83
PID 760 wrote to memory of 2016	760	rmass.exe	83
PID 760 wrote to memory of 616	760	rmass.exe	5
PID 760 wrote to memory of 3556	760	rmass.exe	56

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:616

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3556
- C:\Users\Admin\AppData\Local\Temp\virussign.com_0cc00487cd4d1de76ca624061f694a30.exe
  "C:\Users\Admin\AppData\Local\Temp\virussign.com_0cc00487cd4d1de76ca624061f694a30.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4052
- - 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:760
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2016

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
46KB

MD5
0846bdbd4c2043cd5407a5b18b383128

SHA1
a1a82c94c36bc50247116804502814a5d5c9dab8

SHA256
023c43ddaebc3ca1411e1c4fd38dc45e4c17b38d2ce721ba20c9cedad71a38da

SHA512
4da826b22cce6d13ccf2559900e93bf309b684f6b68258544d51e09fd07bd3beed06f65b23e65c82266379aa180d7e98e32fac9ac7142f17a38b145d1c141068

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

Filesize
47KB

MD5
95af1db41f7e57b7fc41e95a06dfaee7

SHA1
6d8fac937a1d7385eb74120b6f0fd2e672c147d1

SHA256
d16ceb3e768fd6a2b6fc3d63c74598daa8299ba92bbe37832264961a333e44e7

SHA512
334bd0129e08dd2346974db3e6bfd5802e313080b22645a986bc98863d68c51f452c9c55ea72bf83422e705c2799f438c6f7dc7809e3ea761b2d08cdf0dc53a1

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

Filesize
44KB

MD5
0cc00487cd4d1de76ca624061f694a30

SHA1
dcc5cab635d1c1e17f43df850c7da10904465de2

SHA256
2549370a764d632dd587ed5fff9071f19ae430ce909f383b74cfac70d5422435

SHA512
4f725dcf6f5988c13935c8b6cd3981a218f2b696a5fd3b622c10270a02127b7e805368b272468bcfe954adda48ea3d099f8b5a6f36ba96de8dbb0827af535c09

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/760-49-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2016-50-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/4052-5-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads