3aadf1c2d7b6a8d4faa78f201697a4f21edef433e73b50d618801375ada7c719

General

Target

NEAS.62b6825d1cda4ce64401571f4fd1fba0.exe
Size

21KB
MD5

62b6825d1cda4ce64401571f4fd1fba0
SHA1

f259ca43616925f59a2202bf54a928cef9776fc2
SHA256

3aadf1c2d7b6a8d4faa78f201697a4f21edef433e73b50d618801375ada7c719
SHA512

b8dcf0629a683ed8ab70b877204616a5ed54b1d93a93331be7b9e5bbf37c0df9530a423a11a38690770b5d384aa2095e6a2faab26ecbfa93a9ba92876ab2a50d
SSDEEP

384:jIz4cOeIQLcDupwRBMgxgOxfzq/1pL7g4X5hPbLWKMC9bTDClcRQ6TtJMqkfQVmO:jIUcBIQIDuWY2gOxbqz7g4LLZ9rZTDk0

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\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

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 (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{484E464F-5343-4446-484E-464F53434446}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{484E464F-5343-4446-484E-464F53434446}\StubPath = "C:\\Windows\\system32\\ahuy.exe"	rmass.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{484E464F-5343-4446-484E-464F53434446}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{484E464F-5343-4446-484E-464F53434446}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	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
5076	rmass.exe
2440	rmass.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x00040000000222d5-2.dat	upx
behavioral2/memory/5076-5-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x00040000000222d5-4.dat	upx
behavioral2/memory/2440-11-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x00040000000222d5-10.dat	upx
behavioral2/memory/5076-37-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/2440-41-0x0000000000400000-0x0000000000411000-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 opened for modification	C:\Windows\SysWOW64\rmass.exe	NEAS.62b6825d1cda4ce64401571f4fd1fba0.exe
File created	C:\Windows\SysWOW64\rmass.exe	NEAS.62b6825d1cda4ce64401571f4fd1fba0.exe
File opened for modification	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
File opened for modification	C:\Windows\SysWOW64\idbg32.exe	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\ahuy.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\RECOVER32.DLL	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\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
5076	rmass.exe
5076	rmass.exe
5076	rmass.exe
5076	rmass.exe
5076	rmass.exe
5076	rmass.exe
2440	rmass.exe
2440	rmass.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5076	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4480 wrote to memory of 5076	4480	NEAS.62b6825d1cda4ce64401571f4fd1fba0.exe	87
PID 4480 wrote to memory of 5076	4480	NEAS.62b6825d1cda4ce64401571f4fd1fba0.exe	87
PID 4480 wrote to memory of 5076	4480	NEAS.62b6825d1cda4ce64401571f4fd1fba0.exe	87
PID 5076 wrote to memory of 2440	5076	rmass.exe	89
PID 5076 wrote to memory of 2440	5076	rmass.exe	89
PID 5076 wrote to memory of 2440	5076	rmass.exe	89
PID 5076 wrote to memory of 624	5076	rmass.exe	3
PID 5076 wrote to memory of 3276	5076	rmass.exe	17

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:624

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3276
- C:\Users\Admin\AppData\Local\Temp\NEAS.62b6825d1cda4ce64401571f4fd1fba0.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.62b6825d1cda4ce64401571f4fd1fba0.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:4480
- - C:\Windows\SysWOW64\rmass.exe
    "C:\Windows\SysWOW64\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:5076
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2440

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

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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
b3076148c9bb8b2578deb2d9cb4365e3

SHA1
b99366f32a76b908fdb516012bf4f0f243a77cda

SHA256
70f3a77e97269651d83bee7090e7cbbc9a8c5ec86b7144b9280f0a7e58535dc8

SHA512
4ddf289d81b41d4efefe9a87d07aac55bc49d8ff6927d52296814a870a4866338ec9a478b5883be109a77038771b3968ffb264fb6ab6768a4335ff9e2ac074db

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

Filesize
22KB

MD5
128d39f1cbc71f9517c652b734bf2505

SHA1
334a4bc0e9af795910ab446acdf76dda216b60ef

SHA256
5a95e2bfdeebbe582ed6b3b3dc0869934184ecdaf415aaabd9148b2108bc9100

SHA512
51054b7f9fa9c32fbfe97611348d34039198c3fa22838672c5578dc663d897386809d33d988b1dfd2f7ea2283a24b2fc911af1c4996bc95b006118ea3ca65dff

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

Filesize
19KB

MD5
f19a54bba44cac56ed014dcccfbaf1d5

SHA1
0956ea9f2a196c12a003e9ba0df5fd8de58a3ee1

SHA256
7a76d16ae45d1aee7fec5d09132026607a4265b451649761c0328aa9db0ee981

SHA512
7dfbd06894133953d2d8e7a31434df5d7039f0fc5651006530df567d45528df32b8817c6f3212d189dbd9c83ad17ea4e0f08d1fb628789649239e28e35461b3e

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

Filesize
19KB

MD5
f19a54bba44cac56ed014dcccfbaf1d5

SHA1
0956ea9f2a196c12a003e9ba0df5fd8de58a3ee1

SHA256
7a76d16ae45d1aee7fec5d09132026607a4265b451649761c0328aa9db0ee981

SHA512
7dfbd06894133953d2d8e7a31434df5d7039f0fc5651006530df567d45528df32b8817c6f3212d189dbd9c83ad17ea4e0f08d1fb628789649239e28e35461b3e

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

Filesize
19KB

MD5
f19a54bba44cac56ed014dcccfbaf1d5

SHA1
0956ea9f2a196c12a003e9ba0df5fd8de58a3ee1

SHA256
7a76d16ae45d1aee7fec5d09132026607a4265b451649761c0328aa9db0ee981

SHA512
7dfbd06894133953d2d8e7a31434df5d7039f0fc5651006530df567d45528df32b8817c6f3212d189dbd9c83ad17ea4e0f08d1fb628789649239e28e35461b3e

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/2440-11-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2440-41-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4480-3-0x0000000000400000-0x0000000000403000-memory.dmp

Filesize
12KB

Download
memory/5076-5-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/5076-37-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads