57bd8fa92c732e33906d6c32d4ea541c184c9fb0701e91194f92ea3d11ee97ad

General

Target

NEAS.5125d7c2331e20e17b9e0c74be432dd0.exe
Size

19KB
MD5

5125d7c2331e20e17b9e0c74be432dd0
SHA1

aaa402e2834587cc7deb28124966013fd7c738da
SHA256

57bd8fa92c732e33906d6c32d4ea541c184c9fb0701e91194f92ea3d11ee97ad
SHA512

a1b3db9fe32f86a3e9f839d14e498be3c433552e81f725cf04695b7a15ff0496345bc0c797adaf702d9b2e3e843d364695c7fd5740f10af82fe2ee1565263b2a
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvXaBTkfB6E:rRkiLw3HsDSARGG/2Tkpj

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
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4F474956-4746-4143-4F47-495647464143}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4F474956-4746-4143-4F47-495647464143}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4F474956-4746-4143-4F47-495647464143}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4F474956-4746-4143-4F47-495647464143}\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
3944	rmass.exe
3268	rmass.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4532-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x0008000000022dfc-5.dat	upx
behavioral2/memory/4532-6-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x0008000000022dfc-7.dat	upx
behavioral2/files/0x0008000000022dfc-12.dat	upx
behavioral2/memory/3944-41-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/3268-45-0x0000000000400000-0x0000000000411000-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
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 opened for modification	C:\Windows\SysWOW64\RECOVER32.DLL	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
File opened for modification	C:\Windows\SysWOW64\rmass.exe	NEAS.5125d7c2331e20e17b9e0c74be432dd0.exe
File created	C:\Windows\SysWOW64\ntdbg.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 created	C:\Windows\SysWOW64\rmass.exe	NEAS.5125d7c2331e20e17b9e0c74be432dd0.exe
File opened for modification	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\ahuy.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
3944	rmass.exe
3944	rmass.exe
3944	rmass.exe
3944	rmass.exe
3944	rmass.exe
3944	rmass.exe
3268	rmass.exe
3268	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4532	NEAS.5125d7c2331e20e17b9e0c74be432dd0.exe
Token: SeDebugPrivilege	3944	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4532 wrote to memory of 3944	4532	NEAS.5125d7c2331e20e17b9e0c74be432dd0.exe	85
PID 4532 wrote to memory of 3944	4532	NEAS.5125d7c2331e20e17b9e0c74be432dd0.exe	85
PID 4532 wrote to memory of 3944	4532	NEAS.5125d7c2331e20e17b9e0c74be432dd0.exe	85
PID 3944 wrote to memory of 584	3944	rmass.exe	81
PID 3944 wrote to memory of 3268	3944	rmass.exe	86
PID 3944 wrote to memory of 3268	3944	rmass.exe	86
PID 3944 wrote to memory of 3268	3944	rmass.exe	86
PID 3944 wrote to memory of 3272	3944	rmass.exe	33

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3272
- C:\Users\Admin\AppData\Local\Temp\NEAS.5125d7c2331e20e17b9e0c74be432dd0.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.5125d7c2331e20e17b9e0c74be432dd0.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4532
- - 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:3944
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:3268

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:584

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
6852a4135c526fb6c5a7d54d775385d8

SHA1
5d17c6023d1fb22f4096a4b2c6a4a73e14510c74

SHA256
a5d3eef70dce4fecde3081be6c5b1af96ad189c824f506948c3d017a3b89ee17

SHA512
b77ddda58c90f8e24ae5d6754b802949d4f879a3d9558d5e42992e021c3882e575f0bc0d88ff33ebc7012df17c81e4dea0a6c99e88a6156a206af191f09b367b

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

Filesize
22KB

MD5
c2a2b645fed1970edaad72ab5b4b314f

SHA1
9848dea6a96edbb74e79d7796a29e82b85e1d3f3

SHA256
fca4718dcc29cee6040b79b7a3c603d50f245ad145d4ee8798645578241b36cd

SHA512
3fa67375d2b4d41bbe8e7fa9f7e1dd017b721c391620318e14a1fb57c6a7c0caa179cbaeb519d12c7761a72085f37568cea6a1b6cd14660d10e68079aa6f668d

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

Filesize
19KB

MD5
5125d7c2331e20e17b9e0c74be432dd0

SHA1
aaa402e2834587cc7deb28124966013fd7c738da

SHA256
57bd8fa92c732e33906d6c32d4ea541c184c9fb0701e91194f92ea3d11ee97ad

SHA512
a1b3db9fe32f86a3e9f839d14e498be3c433552e81f725cf04695b7a15ff0496345bc0c797adaf702d9b2e3e843d364695c7fd5740f10af82fe2ee1565263b2a

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

Filesize
19KB

MD5
5125d7c2331e20e17b9e0c74be432dd0

SHA1
aaa402e2834587cc7deb28124966013fd7c738da

SHA256
57bd8fa92c732e33906d6c32d4ea541c184c9fb0701e91194f92ea3d11ee97ad

SHA512
a1b3db9fe32f86a3e9f839d14e498be3c433552e81f725cf04695b7a15ff0496345bc0c797adaf702d9b2e3e843d364695c7fd5740f10af82fe2ee1565263b2a

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

Filesize
19KB

MD5
5125d7c2331e20e17b9e0c74be432dd0

SHA1
aaa402e2834587cc7deb28124966013fd7c738da

SHA256
57bd8fa92c732e33906d6c32d4ea541c184c9fb0701e91194f92ea3d11ee97ad

SHA512
a1b3db9fe32f86a3e9f839d14e498be3c433552e81f725cf04695b7a15ff0496345bc0c797adaf702d9b2e3e843d364695c7fd5740f10af82fe2ee1565263b2a

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/3268-45-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3944-41-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4532-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4532-6-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads