24597aed6e4d30e6389e923a319063518d9b0e8c8776f23029dc532afea0d213

General

Target

NEAS.08d7ef2cbd0b39662f48c7d24033d9b0.exe
Size

18KB
MD5

08d7ef2cbd0b39662f48c7d24033d9b0
SHA1

5e8f7a8eaa5f29dc4f28680ded4978c221b622a8
SHA256

24597aed6e4d30e6389e923a319063518d9b0e8c8776f23029dc532afea0d213
SHA512

decc63d0e668be7fe6220a8c563b71b1bc50412d99957d416c8021c092f017357c602a775c8dfa349b6a127165acf1be318552182614d16b18c309c90576e366
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvXqeNjJ:rRkiLw3HsDSARGG/pNjJ

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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4448494F-4f4a-4e4a-4448-494F4F4A4e4a}\StubPath = "C:\\Windows\\system32\\ahuy.exe"	rmass.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4448494F-4f4a-4e4a-4448-494F4F4A4e4a}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4448494F-4f4a-4e4a-4448-494F4F4A4e4a}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4448494F-4f4a-4e4a-4448-494F4F4A4e4a}\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
4400	rmass.exe
2688	rmass.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2532-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x0008000000022ddf-6.dat	upx
behavioral2/memory/4400-11-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x0008000000022ddf-5.dat	upx
behavioral2/memory/2532-7-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x0008000000022ddf-17.dat	upx
behavioral2/memory/4400-42-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/2688-46-0x0000000000400000-0x0000000000411000-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}\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
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

Drops file in System32 directory 12 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\rmass.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	NEAS.08d7ef2cbd0b39662f48c7d24033d9b0.exe
File created	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\RECOVER32.DLL	rmass.exe
File opened for modification	C:\Windows\SysWOW64\winrnt.exe	rmass.exe
File created	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 created	C:\Windows\SysWOW64\rmass.exe	NEAS.08d7ef2cbd0b39662f48c7d24033d9b0.exe
File opened for modification	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\ahuy.exe	rmass.exe
File created	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
4400	rmass.exe
4400	rmass.exe
4400	rmass.exe
4400	rmass.exe
4400	rmass.exe
4400	rmass.exe
2688	rmass.exe
2688	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2532	NEAS.08d7ef2cbd0b39662f48c7d24033d9b0.exe
Token: SeDebugPrivilege	4400	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2532 wrote to memory of 4400	2532	NEAS.08d7ef2cbd0b39662f48c7d24033d9b0.exe	85
PID 2532 wrote to memory of 4400	2532	NEAS.08d7ef2cbd0b39662f48c7d24033d9b0.exe	85
PID 2532 wrote to memory of 4400	2532	NEAS.08d7ef2cbd0b39662f48c7d24033d9b0.exe	85
PID 4400 wrote to memory of 592	4400	rmass.exe	80
PID 4400 wrote to memory of 3152	4400	rmass.exe	38
PID 4400 wrote to memory of 2688	4400	rmass.exe	86
PID 4400 wrote to memory of 2688	4400	rmass.exe	86
PID 4400 wrote to memory of 2688	4400	rmass.exe	86

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3152
- C:\Users\Admin\AppData\Local\Temp\NEAS.08d7ef2cbd0b39662f48c7d24033d9b0.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.08d7ef2cbd0b39662f48c7d24033d9b0.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2532
- - 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:4400
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2688

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:592

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
20KB

MD5
622edf886623df3c36f4aa59a5b351d1

SHA1
502296064537eb7143c80439d21ed15f2b104222

SHA256
59cf3d6d6924ef4e37642d724ca2542fd71b59ec4b2fbc320ac0324751d14ba2

SHA512
c6822e3f97583f895d8cdcfdae9d677a1522bf9f6f6c0b033f57805c3ef0f136d011e5ae6984db227d98066581b3eafbb4e7e6d0db5222c9b2963aad9459be6b

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

Filesize
21KB

MD5
77825d83f73b811247078fbfe1c350f3

SHA1
c3e630d63ee5bbb2b4b2b041c75d1b1430cd2274

SHA256
85ff06e2879393220e97bc61a5e688644895f3ea4558bfcbb75fe7a7e11d54a9

SHA512
1821e2e1f383f3a53bfd045fa6f6d177ab8ebf91f643555a81830709fd92c1a207226b248c5ea22faf0f819aedcad18137fb0d6e1cc2e0ff0dc7d0a3c6b4fb94

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

Filesize
18KB

MD5
08d7ef2cbd0b39662f48c7d24033d9b0

SHA1
5e8f7a8eaa5f29dc4f28680ded4978c221b622a8

SHA256
24597aed6e4d30e6389e923a319063518d9b0e8c8776f23029dc532afea0d213

SHA512
decc63d0e668be7fe6220a8c563b71b1bc50412d99957d416c8021c092f017357c602a775c8dfa349b6a127165acf1be318552182614d16b18c309c90576e366

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

Filesize
18KB

MD5
08d7ef2cbd0b39662f48c7d24033d9b0

SHA1
5e8f7a8eaa5f29dc4f28680ded4978c221b622a8

SHA256
24597aed6e4d30e6389e923a319063518d9b0e8c8776f23029dc532afea0d213

SHA512
decc63d0e668be7fe6220a8c563b71b1bc50412d99957d416c8021c092f017357c602a775c8dfa349b6a127165acf1be318552182614d16b18c309c90576e366

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

Filesize
18KB

MD5
08d7ef2cbd0b39662f48c7d24033d9b0

SHA1
5e8f7a8eaa5f29dc4f28680ded4978c221b622a8

SHA256
24597aed6e4d30e6389e923a319063518d9b0e8c8776f23029dc532afea0d213

SHA512
decc63d0e668be7fe6220a8c563b71b1bc50412d99957d416c8021c092f017357c602a775c8dfa349b6a127165acf1be318552182614d16b18c309c90576e366

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/2532-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2532-7-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2688-46-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4400-11-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4400-42-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads