9645428a1176b8106c7017267a2120ad2d72dd656537513e743bbb3e08b36a5b

General

Target

NEAS.9f2d47d68fa0aadd8fb549421293efc2_JC.exe
Size

19KB
MD5

9f2d47d68fa0aadd8fb549421293efc2
SHA1

a4546ac0592bc5cbf866795971bc26a934281feb
SHA256

9645428a1176b8106c7017267a2120ad2d72dd656537513e743bbb3e08b36a5b
SHA512

f36090a977e860224770d98a93b94fb0bc51dd69664698416b17d14fd7b0d6ea7b83c64cc1cb86c3d0a558a297adc841b4605e3075aacc84f4bbcdef800411b5
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvX+C:rRkiLw3HsDSARGG/OC

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
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{46455554-5a43-4949-4645-55545A434949}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{46455554-5a43-4949-4645-55545A434949}\StubPath = "C:\\Windows\\system32\\ahuy.exe"	rmass.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{46455554-5a43-4949-4645-55545A434949}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{46455554-5a43-4949-4645-55545A434949}\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
3488	rmass.exe
2100	rmass.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2232-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x0008000000022ce4-5.dat	upx
behavioral2/files/0x0008000000022ce4-6.dat	upx
behavioral2/files/0x0008000000022ce4-8.dat	upx
behavioral2/memory/2232-9-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/3488-42-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/2100-49-0x0000000000400000-0x0000000000411000-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\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

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}\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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\{BC84DF00-BC38-9902-8082-6FCBF2D87A0B}\012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345 = "a"	rmass.exe

Drops file in System32 directory 12 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\rmass.exe	NEAS.9f2d47d68fa0aadd8fb549421293efc2_JC.exe
File created	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\winrnt.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\idbg32.exe	rmass.exe
File created	C:\Windows\SysWOW64\rmass.exe	NEAS.9f2d47d68fa0aadd8fb549421293efc2_JC.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
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
2100	rmass.exe
2100	rmass.exe
3488	rmass.exe
3488	rmass.exe
3488	rmass.exe
3488	rmass.exe
3488	rmass.exe
3488	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2232	NEAS.9f2d47d68fa0aadd8fb549421293efc2_JC.exe
Token: SeDebugPrivilege	3488	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2232 wrote to memory of 3488	2232	NEAS.9f2d47d68fa0aadd8fb549421293efc2_JC.exe	91
PID 2232 wrote to memory of 3488	2232	NEAS.9f2d47d68fa0aadd8fb549421293efc2_JC.exe	91
PID 2232 wrote to memory of 3488	2232	NEAS.9f2d47d68fa0aadd8fb549421293efc2_JC.exe	91
PID 3488 wrote to memory of 2100	3488	rmass.exe	92
PID 3488 wrote to memory of 2100	3488	rmass.exe	92
PID 3488 wrote to memory of 2100	3488	rmass.exe	92
PID 3488 wrote to memory of 628	3488	rmass.exe	5
PID 3488 wrote to memory of 3260	3488	rmass.exe	28

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:628

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3260
- C:\Users\Admin\AppData\Local\Temp\NEAS.9f2d47d68fa0aadd8fb549421293efc2_JC.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.9f2d47d68fa0aadd8fb549421293efc2_JC.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2232
- - 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:3488
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2100

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
44f6fa2db0614d5e1eabd7036f831bee

SHA1
0d166aa905dcdf3a433f89961b8c7478264ae4de

SHA256
6cf57d08816312d172b7bdac552e6cd792aecfad9f6c05f8274e1bd73326f73e

SHA512
43b043f8c8804caf6622786268f63d4f234c99a051c07c7e708b834acbe6e9181ca89d88512ed0988221314c366f79d2b8482decde1f2489f7946932cd7af433

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

Filesize
22KB

MD5
bb99fcb510f20da244728dfa10675bd6

SHA1
aa657ef9cd1d601a066540aabe4b1360f76421c7

SHA256
77703abb8393a261215a26b3994ef7170c722a9c710c6ca3469bdcd74925c2a9

SHA512
ca8b649f6409dca3ce0ceb25cd63354a457d67a178b3a14be8b8a93a9b79908828215a26d392601b302751f17559ed28ef54a50636ce7c2ebbe4313fcf9b617d

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

Filesize
19KB

MD5
9f2d47d68fa0aadd8fb549421293efc2

SHA1
a4546ac0592bc5cbf866795971bc26a934281feb

SHA256
9645428a1176b8106c7017267a2120ad2d72dd656537513e743bbb3e08b36a5b

SHA512
f36090a977e860224770d98a93b94fb0bc51dd69664698416b17d14fd7b0d6ea7b83c64cc1cb86c3d0a558a297adc841b4605e3075aacc84f4bbcdef800411b5

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

Filesize
19KB

MD5
9f2d47d68fa0aadd8fb549421293efc2

SHA1
a4546ac0592bc5cbf866795971bc26a934281feb

SHA256
9645428a1176b8106c7017267a2120ad2d72dd656537513e743bbb3e08b36a5b

SHA512
f36090a977e860224770d98a93b94fb0bc51dd69664698416b17d14fd7b0d6ea7b83c64cc1cb86c3d0a558a297adc841b4605e3075aacc84f4bbcdef800411b5

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

Filesize
19KB

MD5
9f2d47d68fa0aadd8fb549421293efc2

SHA1
a4546ac0592bc5cbf866795971bc26a934281feb

SHA256
9645428a1176b8106c7017267a2120ad2d72dd656537513e743bbb3e08b36a5b

SHA512
f36090a977e860224770d98a93b94fb0bc51dd69664698416b17d14fd7b0d6ea7b83c64cc1cb86c3d0a558a297adc841b4605e3075aacc84f4bbcdef800411b5

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/2100-49-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2232-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2232-9-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3488-42-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads