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\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
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "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\{454E5851-4845-5442-454E-585148455442}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{454E5851-4845-5442-454E-585148455442}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{454E5851-4845-5442-454E-585148455442}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{454E5851-4845-5442-454E-585148455442}\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
2804	rmass.exe
4948	rmass.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4920-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x00070000000233d6-5.dat	upx
behavioral2/memory/4920-9-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/2804-13-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/4948-19-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/2804-53-0x0000000000400000-0x0000000000411000-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\winrnt.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\idbg32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	dd79c1624b8e26dd208adc46d9cc7e3df5e12d0d8429993ac5f9d0bcfd0c0cd2.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\ahuy.exe	rmass.exe
File created	C:\Windows\SysWOW64\ahuy.exe	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 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 8 IoCs

pid	Process
2804	rmass.exe
2804	rmass.exe
2804	rmass.exe
2804	rmass.exe
2804	rmass.exe
2804	rmass.exe
4948	rmass.exe
4948	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4920	dd79c1624b8e26dd208adc46d9cc7e3df5e12d0d8429993ac5f9d0bcfd0c0cd2.exe
Token: SeDebugPrivilege	2804	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4920 wrote to memory of 2804	4920	dd79c1624b8e26dd208adc46d9cc7e3df5e12d0d8429993ac5f9d0bcfd0c0cd2.exe	81
PID 4920 wrote to memory of 2804	4920	dd79c1624b8e26dd208adc46d9cc7e3df5e12d0d8429993ac5f9d0bcfd0c0cd2.exe	81
PID 4920 wrote to memory of 2804	4920	dd79c1624b8e26dd208adc46d9cc7e3df5e12d0d8429993ac5f9d0bcfd0c0cd2.exe	81
PID 2804 wrote to memory of 612	2804	rmass.exe	5
PID 2804 wrote to memory of 3448	2804	rmass.exe	56
PID 2804 wrote to memory of 4948	2804	rmass.exe	82
PID 2804 wrote to memory of 4948	2804	rmass.exe	82
PID 2804 wrote to memory of 4948	2804	rmass.exe	82

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:612

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3448
- C:\Users\Admin\AppData\Local\Temp\dd79c1624b8e26dd208adc46d9cc7e3df5e12d0d8429993ac5f9d0bcfd0c0cd2.exe
  "C:\Users\Admin\AppData\Local\Temp\dd79c1624b8e26dd208adc46d9cc7e3df5e12d0d8429993ac5f9d0bcfd0c0cd2.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4920
- - 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:2804
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:4948

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
3d98242be1b83deb0630a1a98447e8a7

SHA1
cd1a27182a2e2bc56217d7bb931dfc8c467ce9fe

SHA256
853d54fe3ee849c18130cdd1972b60e863434b84a60c0ca97107255b15a59955

SHA512
1f157da2b113aea28521e7ab54a0fdeac4f0e0c537b4283e3b9257417f39b488dd7fbdb7a45a9666a9c319b9b1a876192ecdf256c5558aa35cb0848f44d113d5

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

Filesize
25KB

MD5
48fd3fbe2f520fca07fee88e9e83cfe6

SHA1
8dddfc6e65f51d4e0f4bd8d7b7adcb87c9ea7cf2

SHA256
46204a566bc8ffba72e745e9af236e118c34323f48f201b053a9a33b89df8210

SHA512
4a543b6ce40e72542b4040b10a288a8586c89015e44d2c85f4915d28a6857bedd15f18dd3187b2a486c87dca3407e031c867a886b3d2b636176a17d8044df55a

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

Filesize
21KB

MD5
3398083463c6d3c0d0685bbc3fcdb383

SHA1
9eedcc74dde20cf54f8744f71d4666fbda6a5fa7

SHA256
dd79c1624b8e26dd208adc46d9cc7e3df5e12d0d8429993ac5f9d0bcfd0c0cd2

SHA512
2b455541393f9441ae729e7e511ec0bc9ce0d2e6ff19199e234bd596b70ae5786fef3b9509f551f39c6a3b358a832d898725cddcb8632a7826c059748d88252b

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/2804-13-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2804-53-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4920-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4920-9-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4948-19-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads