717d6ca57b81653751456c70379fc01d28dba8d32e4d407dcedec16b72ffdbd1

General

Target

717d6ca57b81653751456c70379fc01d28dba8d32e4d407dcedec16b72ffdbd1.exe
Size

21KB
MD5

c3c3ad21da9d2227d01c94943ed2ff96
SHA1

d51fefd0e6fea83b19fb5c9c4de8b56cd04ad27d
SHA256

717d6ca57b81653751456c70379fc01d28dba8d32e4d407dcedec16b72ffdbd1
SHA512

8e347d5c46481dd8abb250e6629359ba66ab92e14988d0c5c993c209b7a09d417e270f734c8493d6161f50890f46a8044a1f6759ba210472793a04dff22e7d8f
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvX8Mb7a6fc:rRkiLw3HsDSARGG/MMb7rfc

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 (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{46484F48-5a41-4e4d-4648-4F485A414e4d}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{46484F48-5a41-4e4d-4648-4F485A414e4d}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{46484F48-5a41-4e4d-4648-4F485A414e4d}\StubPath = "C:\\Windows\\system32\\ahuy.exe"	rmass.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{46484F48-5a41-4e4d-4648-4F485A414e4d}	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
5020	rmass.exe
1472	rmass.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3760-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x000800000002322e-5.dat	upx
behavioral2/memory/3760-6-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/5020-77-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/1472-87-0x0000000000400000-0x0000000000411000-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}\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\ntdbg.exe	rmass.exe
File opened for modification	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 opened for modification	C:\Windows\SysWOW64\rmass.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	717d6ca57b81653751456c70379fc01d28dba8d32e4d407dcedec16b72ffdbd1.exe
File created	C:\Windows\SysWOW64\rmass.exe	717d6ca57b81653751456c70379fc01d28dba8d32e4d407dcedec16b72ffdbd1.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 created	C:\Windows\SysWOW64\RECOVER32.DLL	rmass.exe
File opened for modification	C:\Windows\SysWOW64\winrnt.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
5020	rmass.exe
5020	rmass.exe
5020	rmass.exe
5020	rmass.exe
5020	rmass.exe
5020	rmass.exe
1472	rmass.exe
1472	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3760	717d6ca57b81653751456c70379fc01d28dba8d32e4d407dcedec16b72ffdbd1.exe
Token: SeDebugPrivilege	5020	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3760 wrote to memory of 5020	3760	717d6ca57b81653751456c70379fc01d28dba8d32e4d407dcedec16b72ffdbd1.exe	84
PID 3760 wrote to memory of 5020	3760	717d6ca57b81653751456c70379fc01d28dba8d32e4d407dcedec16b72ffdbd1.exe	84
PID 3760 wrote to memory of 5020	3760	717d6ca57b81653751456c70379fc01d28dba8d32e4d407dcedec16b72ffdbd1.exe	84
PID 5020 wrote to memory of 608	5020	rmass.exe	5
PID 5020 wrote to memory of 3504	5020	rmass.exe	57
PID 5020 wrote to memory of 1472	5020	rmass.exe	85
PID 5020 wrote to memory of 1472	5020	rmass.exe	85
PID 5020 wrote to memory of 1472	5020	rmass.exe	85

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:608

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3504
- C:\Users\Admin\AppData\Local\Temp\717d6ca57b81653751456c70379fc01d28dba8d32e4d407dcedec16b72ffdbd1.exe
  "C:\Users\Admin\AppData\Local\Temp\717d6ca57b81653751456c70379fc01d28dba8d32e4d407dcedec16b72ffdbd1.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3760
- - 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:5020
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:1472

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
23KB

MD5
adf1f8a8ce1bf0ec41c5a1540a38265c

SHA1
3309639e79e2a5f1f98412f9cd3e3b85481a37f5

SHA256
d548185702a5ce15da3cb3e28940058d577dcbe390509f638d4b4bd110d35e76

SHA512
877a6cb2bcf6813388135d0576d7e5bfb35e62a8d8607a3102bd4683154d121a54e86514f0b135257c9741d79e325596cf403614671a7d6dbd6015ac3d120ac0

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

Filesize
24KB

MD5
36fb845f87febf2211f60802753722d0

SHA1
bd7a44b4bf11b44cd9714e0d459dc05a5ddaecf6

SHA256
42decad43685f426c00d30791fe2e4f4fb7907643cbd621c4543b3ebe8f25b97

SHA512
c90fdcb5af38ebcb21d1179a05237fdb9493918a90bfb6d63a92af304f0c44605a392e3f91c8b4937a1261026eb1087a9f43a93a440bc2dfb91cdc657b24769d

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

Filesize
21KB

MD5
c3c3ad21da9d2227d01c94943ed2ff96

SHA1
d51fefd0e6fea83b19fb5c9c4de8b56cd04ad27d

SHA256
717d6ca57b81653751456c70379fc01d28dba8d32e4d407dcedec16b72ffdbd1

SHA512
8e347d5c46481dd8abb250e6629359ba66ab92e14988d0c5c993c209b7a09d417e270f734c8493d6161f50890f46a8044a1f6759ba210472793a04dff22e7d8f

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/1472-87-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3760-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3760-6-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/5020-77-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads