388f41980693087295c6ac1c7d8b68afc8619afdac814790696fdc089de01790

General

Target

NEAS.b1afeb5d13529fa4b6e4a1d6349da9f0.exe
Size

18KB
MD5

b1afeb5d13529fa4b6e4a1d6349da9f0
SHA1

1a2629398b9bc5e40e017b9e0510b394e67d198d
SHA256

388f41980693087295c6ac1c7d8b68afc8619afdac814790696fdc089de01790
SHA512

a4b23042ae081f8a42bff8cbae11ca0bc179088dd5b685ef2ecad9d813b3ef09161e00f8e74458ebab305d2e3680011086e17f2f338093867e574cf6e2c8b686
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvXz6:rRkiLw3HsDSARGG/j6

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\{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
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

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
3420	rmass.exe
4928	rmass.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3676-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x0008000000022d56-5.dat	upx
behavioral2/memory/3676-6-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x0008000000022d56-7.dat	upx
behavioral2/files/0x0008000000022d56-15.dat	upx
behavioral2/memory/3420-41-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/4928-45-0x0000000000400000-0x0000000000411000-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\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
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	NEAS.b1afeb5d13529fa4b6e4a1d6349da9f0.exe
File created	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\aset32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\idbg32.exe	rmass.exe
File created	C:\Windows\SysWOW64\RECOVER32.DLL	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	NEAS.b1afeb5d13529fa4b6e4a1d6349da9f0.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\ahuy.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\RECOVER32.DLL	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
3420	rmass.exe
3420	rmass.exe
3420	rmass.exe
3420	rmass.exe
3420	rmass.exe
3420	rmass.exe
4928	rmass.exe
4928	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3676	NEAS.b1afeb5d13529fa4b6e4a1d6349da9f0.exe
Token: SeDebugPrivilege	3420	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3676 wrote to memory of 3420	3676	NEAS.b1afeb5d13529fa4b6e4a1d6349da9f0.exe	84
PID 3676 wrote to memory of 3420	3676	NEAS.b1afeb5d13529fa4b6e4a1d6349da9f0.exe	84
PID 3676 wrote to memory of 3420	3676	NEAS.b1afeb5d13529fa4b6e4a1d6349da9f0.exe	84
PID 3420 wrote to memory of 616	3420	rmass.exe	46
PID 3420 wrote to memory of 3304	3420	rmass.exe	55
PID 3420 wrote to memory of 4928	3420	rmass.exe	85
PID 3420 wrote to memory of 4928	3420	rmass.exe	85
PID 3420 wrote to memory of 4928	3420	rmass.exe	85

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

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3304
- C:\Users\Admin\AppData\Local\Temp\NEAS.b1afeb5d13529fa4b6e4a1d6349da9f0.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.b1afeb5d13529fa4b6e4a1d6349da9f0.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3676
- - 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:3420
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:4928

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Windows\SysWOW64\RECOVER32.DLL

Filesize
5KB

MD5
2b2c28a7a01f9584fe220ef84003427f

SHA1
5fc023df0b5064045eb8de7f2dbe26f07f6fec70

SHA256
9e00af53b1d0c0f5270d94a666d95aa7b4dcb9fea49487c210c055c9dcfcc9eb

SHA512
39192a8a91dec1abff25af8dac0cf39da4dfd51b3fb4f1ef0b4e776185d4280fbe8387c2ea778da7bbf2ce288b0bce4d23cbe8d9e87bbd250159044f5adbac78

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

Filesize
20KB

MD5
18492fa3671b67ed917dd94feab2ef3b

SHA1
3a614736a354d2170971fb66d9bbd972463d0ae1

SHA256
3bd607bf1fb75953fbc992953ae3c22fcbc54edcb5d40f162338be956a9fbb09

SHA512
f35a0f7c327f5d1b1c09614789549b31ed9ad41ca900cc83bacfb8612d104e088a318bb9b5b98bc3121e3d669e2d2d8a85edc70033d36a21f991660c41c2ad5e

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

Filesize
21KB

MD5
30951de6c0def5d0dc3dfe7f69975901

SHA1
3ec0285de4178204a687b0b6538113d4078c7a40

SHA256
adc9727ac956b529b0c6b748788a8391e0289a60a855a6fbaf2dd2763b344391

SHA512
669fe1c906a3de697d7ca268bbb8227fc04a0d874c2aed9c6538de0b0390aab37368979f9fab25af30480afb9f983cc4e799a7d4ef2ce12dc7ae5edba394048f

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

Filesize
18KB

MD5
b1afeb5d13529fa4b6e4a1d6349da9f0

SHA1
1a2629398b9bc5e40e017b9e0510b394e67d198d

SHA256
388f41980693087295c6ac1c7d8b68afc8619afdac814790696fdc089de01790

SHA512
a4b23042ae081f8a42bff8cbae11ca0bc179088dd5b685ef2ecad9d813b3ef09161e00f8e74458ebab305d2e3680011086e17f2f338093867e574cf6e2c8b686

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

Filesize
18KB

MD5
b1afeb5d13529fa4b6e4a1d6349da9f0

SHA1
1a2629398b9bc5e40e017b9e0510b394e67d198d

SHA256
388f41980693087295c6ac1c7d8b68afc8619afdac814790696fdc089de01790

SHA512
a4b23042ae081f8a42bff8cbae11ca0bc179088dd5b685ef2ecad9d813b3ef09161e00f8e74458ebab305d2e3680011086e17f2f338093867e574cf6e2c8b686

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

Filesize
18KB

MD5
b1afeb5d13529fa4b6e4a1d6349da9f0

SHA1
1a2629398b9bc5e40e017b9e0510b394e67d198d

SHA256
388f41980693087295c6ac1c7d8b68afc8619afdac814790696fdc089de01790

SHA512
a4b23042ae081f8a42bff8cbae11ca0bc179088dd5b685ef2ecad9d813b3ef09161e00f8e74458ebab305d2e3680011086e17f2f338093867e574cf6e2c8b686

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/3420-41-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3676-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3676-6-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4928-45-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads