6f363e914c2b4f121513e2dc9988001d09ce014c20a307e86d8fd039acf23c5a

General

Target

NEAS.58129d574276d13cf0744a87d51ee28a.exe
Size

19KB
MD5

58129d574276d13cf0744a87d51ee28a
SHA1

d6ea309607c33a4b064700a4f8b521e5abca5642
SHA256

6f363e914c2b4f121513e2dc9988001d09ce014c20a307e86d8fd039acf23c5a
SHA512

2bfb0d2d3d3ece406c51b83f443f2554679c308463ce934eaa714e9f933f542c31960e205c34df80918af088e077935b62bb006c4b3f05e4ea5d34e7870080aa
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvXO1Bf:rRkiLw3HsDSARGG/WBf

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 (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
3096	rmass.exe
1444	rmass.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4820-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x0008000000022dd5-5.dat	upx
behavioral2/files/0x0008000000022dd5-6.dat	upx
behavioral2/files/0x0008000000022dd5-11.dat	upx
behavioral2/memory/4820-10-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/1444-13-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/3096-66-0x0000000000400000-0x0000000000411000-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.58129d574276d13cf0744a87d51ee28a.exe
File created	C:\Windows\SysWOW64\rmass.exe	NEAS.58129d574276d13cf0744a87d51ee28a.exe
File opened for modification	C:\Windows\SysWOW64\ahuy.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\winrnt.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\aset32.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 created	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\idbg32.exe	rmass.exe
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

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1444	rmass.exe
1444	rmass.exe
3096	rmass.exe
3096	rmass.exe
3096	rmass.exe
3096	rmass.exe
3096	rmass.exe
3096	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4820	NEAS.58129d574276d13cf0744a87d51ee28a.exe
Token: SeDebugPrivilege	3096	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4820 wrote to memory of 3096	4820	NEAS.58129d574276d13cf0744a87d51ee28a.exe	86
PID 4820 wrote to memory of 3096	4820	NEAS.58129d574276d13cf0744a87d51ee28a.exe	86
PID 4820 wrote to memory of 3096	4820	NEAS.58129d574276d13cf0744a87d51ee28a.exe	86
PID 3096 wrote to memory of 1444	3096	rmass.exe	87
PID 3096 wrote to memory of 1444	3096	rmass.exe	87
PID 3096 wrote to memory of 1444	3096	rmass.exe	87
PID 3096 wrote to memory of 636	3096	rmass.exe	3
PID 3096 wrote to memory of 3064	3096	rmass.exe	43

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:636

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3064
- C:\Users\Admin\AppData\Local\Temp\NEAS.58129d574276d13cf0744a87d51ee28a.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.58129d574276d13cf0744a87d51ee28a.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4820
- - 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:3096
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:1444

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
22KB

MD5
2db4f9b1b12e55c473d71dd3e1ff99aa

SHA1
7f62bb361d14812e88ed246b9606b688b99d9546

SHA256
1537dd445dd5ace7a8b3caa2d02ce365fe7a6ae931bc786097f805ce0d1c8c7e

SHA512
3acdd47d347ac2c594700fc98ca7ece46587ed07a85f5e5e114d6a744514a482a6af345970d01369c3f898040f937a298bbbef27699d96b6d3501f8dd8aa45b3

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

Filesize
23KB

MD5
fbf68468d2b53b460a62f4099a83f2d0

SHA1
600ada0b2d367f8ce3247a709db820a04cacbce7

SHA256
793c94de9e8cb6b64b2e3294c06efc920a09aa5c5b09436e6d05ca59c50d6a03

SHA512
f9b6ec97fcfe4040fc6a4d8a72e15e98d098e3a71057a639f860d73a78a26638775ca4d43818608e77d8928296396c4cc4e61018f882c46c3cc88b31caf38e1d

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

Filesize
19KB

MD5
58129d574276d13cf0744a87d51ee28a

SHA1
d6ea309607c33a4b064700a4f8b521e5abca5642

SHA256
6f363e914c2b4f121513e2dc9988001d09ce014c20a307e86d8fd039acf23c5a

SHA512
2bfb0d2d3d3ece406c51b83f443f2554679c308463ce934eaa714e9f933f542c31960e205c34df80918af088e077935b62bb006c4b3f05e4ea5d34e7870080aa

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

Filesize
19KB

MD5
58129d574276d13cf0744a87d51ee28a

SHA1
d6ea309607c33a4b064700a4f8b521e5abca5642

SHA256
6f363e914c2b4f121513e2dc9988001d09ce014c20a307e86d8fd039acf23c5a

SHA512
2bfb0d2d3d3ece406c51b83f443f2554679c308463ce934eaa714e9f933f542c31960e205c34df80918af088e077935b62bb006c4b3f05e4ea5d34e7870080aa

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

Filesize
19KB

MD5
58129d574276d13cf0744a87d51ee28a

SHA1
d6ea309607c33a4b064700a4f8b521e5abca5642

SHA256
6f363e914c2b4f121513e2dc9988001d09ce014c20a307e86d8fd039acf23c5a

SHA512
2bfb0d2d3d3ece406c51b83f443f2554679c308463ce934eaa714e9f933f542c31960e205c34df80918af088e077935b62bb006c4b3f05e4ea5d34e7870080aa

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/1444-13-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3096-66-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4820-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4820-10-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads