55e7a44ac6dc26b97434d40e191f05df70a502979fe6ef5ab6d98cdcaa222e70

General

Target

NEAS.6cca7485f82cbe1e96e8e1e59585ac60.exe
Size

19KB
MD5

6cca7485f82cbe1e96e8e1e59585ac60
SHA1

39c28383269a33b97066960b8462d4348bee4a76
SHA256

55e7a44ac6dc26b97434d40e191f05df70a502979fe6ef5ab6d98cdcaa222e70
SHA512

01660c050ea828c32de37edc7119227a199a5ad95e492a9e67009b980a71c78e36582d1d4fcb091edfb6fde7869e112bbe831c0776affba54a2f41f3969385f5
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvXMBv:rRkiLw3HsDSARGG/8Bv

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\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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4459575A-4a46-504a-4459-575A4A46504a}\StubPath = "C:\\Windows\\system32\\ahuy.exe"	rmass.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4459575A-4a46-504a-4459-575A4A46504a}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4459575A-4a46-504a-4459-575A4A46504a}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4459575A-4a46-504a-4459-575A4A46504a}\IsInstalled = "1"	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
3784	rmass.exe
4020	rmass.exe

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3976-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x0008000000022d53-5.dat	upx
behavioral2/memory/3976-6-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/3784-9-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x0008000000022d53-11.dat	upx
behavioral2/memory/4020-18-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x0008000000022d53-7.dat	upx
behavioral2/memory/3784-46-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/4020-50-0x0000000000400000-0x0000000000411000-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\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\rmass.exe	NEAS.6cca7485f82cbe1e96e8e1e59585ac60.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\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\rmass.exe	NEAS.6cca7485f82cbe1e96e8e1e59585ac60.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 created	C:\Windows\SysWOW64\RECOVER32.DLL	rmass.exe
File opened for modification	C:\Windows\SysWOW64\idbg32.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\idbg32.exe	rmass.exe
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

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3784	rmass.exe
3784	rmass.exe
3784	rmass.exe
3784	rmass.exe
3784	rmass.exe
3784	rmass.exe
4020	rmass.exe
4020	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3976	NEAS.6cca7485f82cbe1e96e8e1e59585ac60.exe
Token: SeDebugPrivilege	3784	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3976 wrote to memory of 3784	3976	NEAS.6cca7485f82cbe1e96e8e1e59585ac60.exe	84
PID 3976 wrote to memory of 3784	3976	NEAS.6cca7485f82cbe1e96e8e1e59585ac60.exe	84
PID 3976 wrote to memory of 3784	3976	NEAS.6cca7485f82cbe1e96e8e1e59585ac60.exe	84
PID 3784 wrote to memory of 4020	3784	rmass.exe	85
PID 3784 wrote to memory of 4020	3784	rmass.exe	85
PID 3784 wrote to memory of 4020	3784	rmass.exe	85
PID 3784 wrote to memory of 620	3784	rmass.exe	81
PID 3784 wrote to memory of 3300	3784	rmass.exe	18

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3300
- C:\Users\Admin\AppData\Local\Temp\NEAS.6cca7485f82cbe1e96e8e1e59585ac60.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.6cca7485f82cbe1e96e8e1e59585ac60.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3976
- - 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:3784
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:4020

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:620

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
21KB

MD5
c7af31b5edcfc51e4ab8347cc8fde0bc

SHA1
757747ed68dfdc88f1a037211c141dc6993df439

SHA256
29e47da4de1f04ba262829a7ac05843a306e743699cc6b465bc22725f10197b8

SHA512
20f7ee5f26da4a8ed4922c3b341247ffc4b5a501d4e1fb4ba6cd7e1cd4db0868fb10626e2b367a196f1c1397955f500c7ab40da3bd91930f442b51573ba55fe4

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

Filesize
22KB

MD5
6e2e8cad18d6621c7f6cda7f143d4a16

SHA1
f93aa36bf8e38eb01edb837353825e0994c3f80b

SHA256
6759b52c16ccefad45d847a3a8d7f2d32034cd4a0248a7b2aaa7366895606a36

SHA512
021a0b0d7015d04a103dd92c99413289cd552c9c3c74992545a372678acc33ac3d79061f7603773ee42ee29630b012aa61d958fe976abc234ba3666aae072f15

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

Filesize
19KB

MD5
6cca7485f82cbe1e96e8e1e59585ac60

SHA1
39c28383269a33b97066960b8462d4348bee4a76

SHA256
55e7a44ac6dc26b97434d40e191f05df70a502979fe6ef5ab6d98cdcaa222e70

SHA512
01660c050ea828c32de37edc7119227a199a5ad95e492a9e67009b980a71c78e36582d1d4fcb091edfb6fde7869e112bbe831c0776affba54a2f41f3969385f5

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

Filesize
19KB

MD5
6cca7485f82cbe1e96e8e1e59585ac60

SHA1
39c28383269a33b97066960b8462d4348bee4a76

SHA256
55e7a44ac6dc26b97434d40e191f05df70a502979fe6ef5ab6d98cdcaa222e70

SHA512
01660c050ea828c32de37edc7119227a199a5ad95e492a9e67009b980a71c78e36582d1d4fcb091edfb6fde7869e112bbe831c0776affba54a2f41f3969385f5

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

Filesize
19KB

MD5
6cca7485f82cbe1e96e8e1e59585ac60

SHA1
39c28383269a33b97066960b8462d4348bee4a76

SHA256
55e7a44ac6dc26b97434d40e191f05df70a502979fe6ef5ab6d98cdcaa222e70

SHA512
01660c050ea828c32de37edc7119227a199a5ad95e492a9e67009b980a71c78e36582d1d4fcb091edfb6fde7869e112bbe831c0776affba54a2f41f3969385f5

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/3784-9-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3784-46-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3976-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3976-6-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4020-18-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4020-50-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads