dd79c1624b8e26dd208adc46d9cc7e3df5e12d0d8429993ac5f9d0bcfd0c0cd2

General

Target

dd79c1624b8e26dd208adc46d9cc7e3df5e12d0d8429993ac5f9d0bcfd0c0cd2.exe
Size

21KB
MD5

3398083463c6d3c0d0685bbc3fcdb383
SHA1

9eedcc74dde20cf54f8744f71d4666fbda6a5fa7
SHA256

dd79c1624b8e26dd208adc46d9cc7e3df5e12d0d8429993ac5f9d0bcfd0c0cd2
SHA512

2b455541393f9441ae729e7e511ec0bc9ce0d2e6ff19199e234bd596b70ae5786fef3b9509f551f39c6a3b358a832d898725cddcb8632a7826c059748d88252b
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvX8Mb7a6TrsJ:rRkiLw3HsDSARGG/MMb7rfK

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
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{495A4B43-4b4f-5450-495A-4B434B4F5450}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{495A4B43-4b4f-5450-495A-4B434B4F5450}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{495A4B43-4b4f-5450-495A-4B434B4F5450}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{495A4B43-4b4f-5450-495A-4B434B4F5450}\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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe\Debugger = "C:\\Windows\\system32\\ntdbg.exe"	rmass.exe
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

Executes dropped EXE 2 IoCs

pid	Process
2844	rmass.exe
1764	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
2408	dd79c1624b8e26dd208adc46d9cc7e3df5e12d0d8429993ac5f9d0bcfd0c0cd2.exe
2408	dd79c1624b8e26dd208adc46d9cc7e3df5e12d0d8429993ac5f9d0bcfd0c0cd2.exe
2844	rmass.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2408-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2408-5-0x00000000003A0000-0x00000000003B1000-memory.dmp	upx
behavioral1/files/0x000d000000012342-4.dat	upx
behavioral1/memory/2408-13-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2844-14-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2844-59-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/1764-60-0x0000000000400000-0x0000000000411000-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
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 opened for modification	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\winrnt.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\aset32.exe	rmass.exe
File created	C:\Windows\SysWOW64\ahuy.exe	rmass.exe
File created	C:\Windows\SysWOW64\RECOVER32.DLL	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\rmass.exe	dd79c1624b8e26dd208adc46d9cc7e3df5e12d0d8429993ac5f9d0bcfd0c0cd2.exe
File created	C:\Windows\SysWOW64\rmass.exe	dd79c1624b8e26dd208adc46d9cc7e3df5e12d0d8429993ac5f9d0bcfd0c0cd2.exe
File opened for modification	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File created	C:\Windows\SysWOW64\ntdbg.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 4 IoCs

pid	Process
2844	rmass.exe
2844	rmass.exe
2844	rmass.exe
1764	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2408	dd79c1624b8e26dd208adc46d9cc7e3df5e12d0d8429993ac5f9d0bcfd0c0cd2.exe
Token: SeDebugPrivilege	2844	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2408 wrote to memory of 2844	2408	dd79c1624b8e26dd208adc46d9cc7e3df5e12d0d8429993ac5f9d0bcfd0c0cd2.exe	28
PID 2408 wrote to memory of 2844	2408	dd79c1624b8e26dd208adc46d9cc7e3df5e12d0d8429993ac5f9d0bcfd0c0cd2.exe	28
PID 2408 wrote to memory of 2844	2408	dd79c1624b8e26dd208adc46d9cc7e3df5e12d0d8429993ac5f9d0bcfd0c0cd2.exe	28
PID 2408 wrote to memory of 2844	2408	dd79c1624b8e26dd208adc46d9cc7e3df5e12d0d8429993ac5f9d0bcfd0c0cd2.exe	28
PID 2844 wrote to memory of 436	2844	rmass.exe	5
PID 2844 wrote to memory of 1248	2844	rmass.exe	21
PID 2844 wrote to memory of 1764	2844	rmass.exe	29
PID 2844 wrote to memory of 1764	2844	rmass.exe	29
PID 2844 wrote to memory of 1764	2844	rmass.exe	29
PID 2844 wrote to memory of 1764	2844	rmass.exe	29

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:436

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1248
- C:\Users\Admin\AppData\Local\Temp\dd79c1624b8e26dd208adc46d9cc7e3df5e12d0d8429993ac5f9d0bcfd0c0cd2.exe
  "C:\Users\Admin\AppData\Local\Temp\dd79c1624b8e26dd208adc46d9cc7e3df5e12d0d8429993ac5f9d0bcfd0c0cd2.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2408
- - 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
    - Loads dropped DLL
    - 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:2844
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:1764

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
24KB

MD5
e3ca421df1fd122c059d788842b14add

SHA1
a52752eb48f9fa2e691ad2efa910c207df102aab

SHA256
7e4230d4c845d0beff7adff1474576bddd7801aa6b87d5ff3204c699af3bff35

SHA512
466e40f9fac1377a4bfa490d7d1e446e3df675121850b127a06f6996a6b4bf6441feb122b6a6a1b2095fd51c1cf881b2a714a0ce28881675434da9cf649e011c

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

Filesize
25KB

MD5
0655d3d99e3a4fc221e0b7950f453db2

SHA1
89ef3a1dc7683c56af1e54f571f711eb591b4f2d

SHA256
b430cd49d849810339c2c7f9ab2f34b4b304628b24709348d09a9595a6eaa1ef

SHA512
1a5e5cb257fe7cd75d9d65ff5f7b18469f2a74054eb225b5b971d0b51554f55152bfe4f6928e3e05dcafc7c20fa33599df3b6c41c3aeb18d0dba2035683de703

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

Filesize
1KB

MD5
b10b13206b0f2cf3968050072f6979bf

SHA1
699db21ba9cecf3f13ac3d76e22cfa41aa94da80

SHA256
0eef3217095cb97b695c434e74d6314bf9e869a013d6e9c88e58c34576a276b4

SHA512
d33bfd931be6676539507a69101d99fa4c5ef36b12422bd11f063b9b6a47b7444f6c4ad5f35e044714fdb872e96cd9fddf049e8329af1219483887f6ac5f4a5d

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
21KB

MD5
3398083463c6d3c0d0685bbc3fcdb383

SHA1
9eedcc74dde20cf54f8744f71d4666fbda6a5fa7

SHA256
dd79c1624b8e26dd208adc46d9cc7e3df5e12d0d8429993ac5f9d0bcfd0c0cd2

SHA512
2b455541393f9441ae729e7e511ec0bc9ce0d2e6ff19199e234bd596b70ae5786fef3b9509f551f39c6a3b358a832d898725cddcb8632a7826c059748d88252b

Download Submit
memory/1764-60-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2408-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2408-5-0x00000000003A0000-0x00000000003B1000-memory.dmp

Filesize
68KB

Download
memory/2408-13-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2844-14-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2844-59-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads