0ca4811582d906eca1b15785a17072df9851834495a61b966377f36bd493be98

General

Target

0ca4811582d906eca1b15785a17072df9851834495a61b966377f36bd493be98.exe
Size

23KB
MD5

5e08afa3028531a64054b9c61811719c
SHA1

5973c34c07dba3b764cbd859dce9bef59d796fe8
SHA256

0ca4811582d906eca1b15785a17072df9851834495a61b966377f36bd493be98
SHA512

4f1f35e561a99334b5f675e6c9b30548df5cdd43f1eb6df78e77a90777cf277129d5a9a0ec34c4450c3aee21594a57c16b801c61000e3e41d6de113a71bb1bb8
SSDEEP

384:jIz4SkysDMEAsy/9z6xcU2uTTgJwSK5YBV26Bcjze+wW5ton0yBRyDFUuM:jIU9rDHSR6Wl2gZKizyzeS5t6r4BtM

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\{44425853-5a56-4756-4442-58535A564756}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{44425853-5a56-4756-4442-58535A564756}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{44425853-5a56-4756-4442-58535A564756}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{44425853-5a56-4756-4442-58535A564756}\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
3396	rmass.exe
384	rmass.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3396-4-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x000800000002321d-2.dat	upx
behavioral2/memory/3396-75-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/384-85-0x0000000000400000-0x0000000000411000-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
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 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\aset32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\idbg32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	0ca4811582d906eca1b15785a17072df9851834495a61b966377f36bd493be98.exe
File created	C:\Windows\SysWOW64\rmass.exe	0ca4811582d906eca1b15785a17072df9851834495a61b966377f36bd493be98.exe
File opened for modification	C:\Windows\SysWOW64\ahuy.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File created	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File created	C:\Windows\SysWOW64\RECOVER32.DLL	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
3396	rmass.exe
3396	rmass.exe
3396	rmass.exe
3396	rmass.exe
3396	rmass.exe
3396	rmass.exe
384	rmass.exe
384	rmass.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3396	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2692 wrote to memory of 3396	2692	0ca4811582d906eca1b15785a17072df9851834495a61b966377f36bd493be98.exe	89
PID 2692 wrote to memory of 3396	2692	0ca4811582d906eca1b15785a17072df9851834495a61b966377f36bd493be98.exe	89
PID 2692 wrote to memory of 3396	2692	0ca4811582d906eca1b15785a17072df9851834495a61b966377f36bd493be98.exe	89
PID 3396 wrote to memory of 384	3396	rmass.exe	90
PID 3396 wrote to memory of 384	3396	rmass.exe	90
PID 3396 wrote to memory of 384	3396	rmass.exe	90
PID 3396 wrote to memory of 592	3396	rmass.exe	5
PID 3396 wrote to memory of 3500	3396	rmass.exe	57

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:592

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3500
- C:\Users\Admin\AppData\Local\Temp\0ca4811582d906eca1b15785a17072df9851834495a61b966377f36bd493be98.exe
  "C:\Users\Admin\AppData\Local\Temp\0ca4811582d906eca1b15785a17072df9851834495a61b966377f36bd493be98.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:2692
- - C:\Windows\SysWOW64\rmass.exe
    "C:\Windows\SysWOW64\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:3396
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:384

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
72479aa9422b120c10979dfa3ef3e4af

SHA1
130e07eddf52e268d7d2453193984b5f1004b8c1

SHA256
ab530d6a7cde9d53f36603f5de78a57582f405ec768db8ff73c4dbdbacc274b7

SHA512
9992b3e06ea211de33fb05b73cc538f76114d923e98bb22d5becc7cd5cd317ca1fe202c2a260544e43d4ede904a8143b4503659827751d1b8d77bbd591378615

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

Filesize
24KB

MD5
c8e8504176370236bf757740da40c551

SHA1
1644343d22b844fd68ec028a03473cbaa1cc5941

SHA256
598e66538f81488645233f5bd3dd41c1df58eb0a6945c56159a24f23ab696fd8

SHA512
3c98f7f52c8406cb13b301579e2d73560a99e24058515edf8c8c097c4af01b85ad6da0aacb2ec4602528fc91a7516eb34f5d1348ee700c50d40e39efa26c6fdd

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

Filesize
21KB

MD5
ce615ba79889dc206134d5b972e1aa71

SHA1
a18b4152eee11abefbd6c78bc893990f6fd9ca0a

SHA256
4a21c682bcf0e2072b545aad8e5772362e74428f40c674452cd572c69b36a3f7

SHA512
9598b5df63c22564c5f8e60b4d4d8da2147703c0cb2040c3645bc24b82f4b2a126321ebeaa37adb56b06addff06c08becaf5fc70d14561c8cb118b169fa3c021

Download Submit
memory/384-85-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2692-3-0x0000000000400000-0x0000000000403000-memory.dmp

Filesize
12KB

Download
memory/3396-4-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3396-75-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads