da5592353556df24a82b7c96b111fe38a39a0c4fdb1b25f5689913db7c2b3b8b

General

Target

NEAS.f1612f46f423f4ba8a460692c3876938.exe
Size

19KB
MD5

f1612f46f423f4ba8a460692c3876938
SHA1

c4309d9f19542e6365f7f501cfcb7bd532cacfb5
SHA256

da5592353556df24a82b7c96b111fe38a39a0c4fdb1b25f5689913db7c2b3b8b
SHA512

2c19224beda09928864ce7eca312b0a63ac812e94bef0e423aa5aea447d4c7bad5473bd07c752b3a4896895010358c6d8698de4c1d649ae0beff45766753664e
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvX+9BY:rRkiLw3HsDSARGG/O9W

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
4852	rmass.exe
1700	rmass.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2304-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x0007000000022e26-5.dat	upx
behavioral2/files/0x0007000000022e26-7.dat	upx
behavioral2/memory/2304-6-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/4852-8-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x0007000000022e26-12.dat	upx
behavioral2/memory/1700-18-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/4852-79-0x0000000000400000-0x0000000000411000-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\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
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\rmass.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	NEAS.f1612f46f423f4ba8a460692c3876938.exe
File created	C:\Windows\SysWOW64\rmass.exe	NEAS.f1612f46f423f4ba8a460692c3876938.exe
File opened for modification	C:\Windows\SysWOW64\ntdbg.exe	rmass.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\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\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
4852	rmass.exe
4852	rmass.exe
4852	rmass.exe
4852	rmass.exe
4852	rmass.exe
4852	rmass.exe
1700	rmass.exe
1700	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2304	NEAS.f1612f46f423f4ba8a460692c3876938.exe
Token: SeDebugPrivilege	4852	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2304 wrote to memory of 4852	2304	NEAS.f1612f46f423f4ba8a460692c3876938.exe	86
PID 2304 wrote to memory of 4852	2304	NEAS.f1612f46f423f4ba8a460692c3876938.exe	86
PID 2304 wrote to memory of 4852	2304	NEAS.f1612f46f423f4ba8a460692c3876938.exe	86
PID 4852 wrote to memory of 1700	4852	rmass.exe	87
PID 4852 wrote to memory of 1700	4852	rmass.exe	87
PID 4852 wrote to memory of 1700	4852	rmass.exe	87
PID 4852 wrote to memory of 624	4852	rmass.exe	4
PID 4852 wrote to memory of 3084	4852	rmass.exe	48

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

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3084
- C:\Users\Admin\AppData\Local\Temp\NEAS.f1612f46f423f4ba8a460692c3876938.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.f1612f46f423f4ba8a460692c3876938.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2304
- - 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:4852
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:1700

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
296f85cf27f6be180a90b85737f8c09f

SHA1
85d607095c154eab669d92fc1ebac2842c0eaddd

SHA256
08a2e412d448e165843c4d9aedc5fa1e02c83d28196f2bc04d597fd2008bb623

SHA512
83afee68d1288cc3a1f2739ef7774b804313d81a92f17d0af83829dd9b4d711774a4654dcf5ed6f7a0d10efd41bd743eab41cce62e5f23b27c6846f531526b2b

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

Filesize
22KB

MD5
7b2890a330c27afa089b85b5568f2bb4

SHA1
e3882c1598fa6b869bf88f3ef524a2186c09ced6

SHA256
27ed4f532f63bc6708ac3367c2c069186a025cbe8c6a73746dfdb4a16aad95a5

SHA512
d52005950eb312ee305b24bab432eb207988aded35a3babecabf362c97d392fe017ec1f456b993b7937059bb1344f7a77831a98c97d138a17f029a28582cd4f1

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

Filesize
19KB

MD5
f1612f46f423f4ba8a460692c3876938

SHA1
c4309d9f19542e6365f7f501cfcb7bd532cacfb5

SHA256
da5592353556df24a82b7c96b111fe38a39a0c4fdb1b25f5689913db7c2b3b8b

SHA512
2c19224beda09928864ce7eca312b0a63ac812e94bef0e423aa5aea447d4c7bad5473bd07c752b3a4896895010358c6d8698de4c1d649ae0beff45766753664e

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

Filesize
19KB

MD5
f1612f46f423f4ba8a460692c3876938

SHA1
c4309d9f19542e6365f7f501cfcb7bd532cacfb5

SHA256
da5592353556df24a82b7c96b111fe38a39a0c4fdb1b25f5689913db7c2b3b8b

SHA512
2c19224beda09928864ce7eca312b0a63ac812e94bef0e423aa5aea447d4c7bad5473bd07c752b3a4896895010358c6d8698de4c1d649ae0beff45766753664e

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

Filesize
19KB

MD5
f1612f46f423f4ba8a460692c3876938

SHA1
c4309d9f19542e6365f7f501cfcb7bd532cacfb5

SHA256
da5592353556df24a82b7c96b111fe38a39a0c4fdb1b25f5689913db7c2b3b8b

SHA512
2c19224beda09928864ce7eca312b0a63ac812e94bef0e423aa5aea447d4c7bad5473bd07c752b3a4896895010358c6d8698de4c1d649ae0beff45766753664e

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/1700-18-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2304-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2304-6-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4852-8-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4852-79-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads