d96e5d980600cf0d21be607cb0ad032d84ea804b408e045505ee4dccddf5a84c

General

Target

d96e5d980600cf0d21be607cb0ad032d84ea804b408e045505ee4dccddf5a84c.exe
Size

63KB
MD5

a3b56f5981b3bd2c9fbba7ee4586e89b
SHA1

62cde96100a51095cb6d741c82aae90f56a243d7
SHA256

d96e5d980600cf0d21be607cb0ad032d84ea804b408e045505ee4dccddf5a84c
SHA512

3613e597f0b6e489b9563b7065628387250222d2f518ab01fe37eb32d7ba633c193345b4bda5ebd7a5803504296555afcef5804c587e31a2abdf9acfc7e59242
SSDEEP

768:rAUJmQCcmLCXQq6fsKiJYsIkjJVzqsVG5kuGKQLddOW/O4Wv904O:sUNHFKQbIkHvGMdOh4004O

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\{52484154-5145-4451-5248-415451454451}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{52484154-5145-4451-5248-415451454451}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{52484154-5145-4451-5248-415451454451}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{52484154-5145-4451-5248-415451454451}\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
2724	rmass.exe
640	rmass.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4768-0-0x0000000000400000-0x0000000000412000-memory.dmp	upx
behavioral2/memory/4768-7-0x0000000000400000-0x0000000000412000-memory.dmp	upx
behavioral2/files/0x0007000000023288-6.dat	upx
behavioral2/memory/640-17-0x0000000000400000-0x0000000000412000-memory.dmp	upx
behavioral2/memory/2724-51-0x0000000000400000-0x0000000000412000-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 created	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\idbg32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	rmass.exe
File created	C:\Windows\SysWOW64\rmass.exe	d96e5d980600cf0d21be607cb0ad032d84ea804b408e045505ee4dccddf5a84c.exe
File opened for modification	C:\Windows\SysWOW64\ahuy.exe	rmass.exe
File created	C:\Windows\SysWOW64\ntdbg.exe	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	d96e5d980600cf0d21be607cb0ad032d84ea804b408e045505ee4dccddf5a84c.exe
File opened for modification	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
2724	rmass.exe
2724	rmass.exe
2724	rmass.exe
2724	rmass.exe
2724	rmass.exe
2724	rmass.exe
640	rmass.exe
640	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4768	d96e5d980600cf0d21be607cb0ad032d84ea804b408e045505ee4dccddf5a84c.exe
Token: SeDebugPrivilege	2724	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4768 wrote to memory of 2724	4768	d96e5d980600cf0d21be607cb0ad032d84ea804b408e045505ee4dccddf5a84c.exe	85
PID 4768 wrote to memory of 2724	4768	d96e5d980600cf0d21be607cb0ad032d84ea804b408e045505ee4dccddf5a84c.exe	85
PID 4768 wrote to memory of 2724	4768	d96e5d980600cf0d21be607cb0ad032d84ea804b408e045505ee4dccddf5a84c.exe	85
PID 2724 wrote to memory of 612	2724	rmass.exe	5
PID 2724 wrote to memory of 3444	2724	rmass.exe	56
PID 2724 wrote to memory of 640	2724	rmass.exe	86
PID 2724 wrote to memory of 640	2724	rmass.exe	86
PID 2724 wrote to memory of 640	2724	rmass.exe	86

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

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3444
- C:\Users\Admin\AppData\Local\Temp\d96e5d980600cf0d21be607cb0ad032d84ea804b408e045505ee4dccddf5a84c.exe
  "C:\Users\Admin\AppData\Local\Temp\d96e5d980600cf0d21be607cb0ad032d84ea804b408e045505ee4dccddf5a84c.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4768
- - 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:2724
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:640

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
66KB

MD5
fa16bce71ff8a4b7c51061b513cb1551

SHA1
ad96ab7a894c2ee27b7e98b053003f56df6d48b3

SHA256
23f1c35177db43d5c31532ddfc9fbd3ae9c41e04a92a87ee966c2a8d7d82af0b

SHA512
8139d93a02b20f3fc4bfe96d4cebc135e6c73d3b443c2dd42b4b1ac455fc2c9f8cbe54bc700806b8dc417767a112bade6cd11b35c376fcf8b7b298f2e8af9a04

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

Filesize
67KB

MD5
f90361c79a093a3769384976fe4ee80b

SHA1
779e9fab820cc029368c265a111917c4475f5024

SHA256
17522e9865bab9590502b180ef3e4234fdf421f72f8112679879fe39a48b52ac

SHA512
9eb1e3a7d0a5318531f3722ea8c66ecefa43256a9376bfc26977672a3c9726be14b367e6f992c013fac0a60fcb5c0dae199221591a28006e0fb7cd27469a07c3

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

Filesize
63KB

MD5
a3b56f5981b3bd2c9fbba7ee4586e89b

SHA1
62cde96100a51095cb6d741c82aae90f56a243d7

SHA256
d96e5d980600cf0d21be607cb0ad032d84ea804b408e045505ee4dccddf5a84c

SHA512
3613e597f0b6e489b9563b7065628387250222d2f518ab01fe37eb32d7ba633c193345b4bda5ebd7a5803504296555afcef5804c587e31a2abdf9acfc7e59242

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/640-17-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2724-51-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4768-0-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4768-7-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads