7b8df1e07bd10d0ef2678749ad73392cee7b264ce4810936d70b89db75acb8a4

General

Target

7b8df1e07bd10d0ef2678749ad73392cee7b264ce4810936d70b89db75acb8a4.exe
Size

22KB
MD5

842108f1e17b6f54d7e243ab26210801
SHA1

37cf3f56e2d5d0a2b091d5f180d4e0a89f5c0428
SHA256

7b8df1e07bd10d0ef2678749ad73392cee7b264ce4810936d70b89db75acb8a4
SHA512

f7b90da38256b04b1f6b950a206732994662fea9accb1851b45d51f5cf16ee217411b3e7ae67762cb6aef134a2d556ea39c34d03fe2a10997f30210aeafdda18
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvXVB787v:rRkiLw3HsDSARGG/r87v

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\{495A4B43-4b4f-5450-495A-4B434B4F5450}\StubPath = "C:\\Windows\\system32\\ahuy.exe"	rmass.exe
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

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
3016	rmass.exe
2672	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
2156	7b8df1e07bd10d0ef2678749ad73392cee7b264ce4810936d70b89db75acb8a4.exe
2156	7b8df1e07bd10d0ef2678749ad73392cee7b264ce4810936d70b89db75acb8a4.exe
3016	rmass.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2156-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x000e000000014708-4.dat	upx
behavioral1/memory/2672-27-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/3016-25-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2156-5-0x0000000000360000-0x0000000000371000-memory.dmp	upx
behavioral1/memory/2156-12-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/3016-61-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2672-62-0x0000000000400000-0x0000000000411000-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\rmass.exe	7b8df1e07bd10d0ef2678749ad73392cee7b264ce4810936d70b89db75acb8a4.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
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	7b8df1e07bd10d0ef2678749ad73392cee7b264ce4810936d70b89db75acb8a4.exe
File created	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
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\rmass.exe	rmass.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 4 IoCs

pid	Process
3016	rmass.exe
3016	rmass.exe
3016	rmass.exe
2672	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2156	7b8df1e07bd10d0ef2678749ad73392cee7b264ce4810936d70b89db75acb8a4.exe
Token: SeDebugPrivilege	3016	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2156 wrote to memory of 3016	2156	7b8df1e07bd10d0ef2678749ad73392cee7b264ce4810936d70b89db75acb8a4.exe	28
PID 2156 wrote to memory of 3016	2156	7b8df1e07bd10d0ef2678749ad73392cee7b264ce4810936d70b89db75acb8a4.exe	28
PID 2156 wrote to memory of 3016	2156	7b8df1e07bd10d0ef2678749ad73392cee7b264ce4810936d70b89db75acb8a4.exe	28
PID 2156 wrote to memory of 3016	2156	7b8df1e07bd10d0ef2678749ad73392cee7b264ce4810936d70b89db75acb8a4.exe	28
PID 3016 wrote to memory of 436	3016	rmass.exe	5
PID 3016 wrote to memory of 1172	3016	rmass.exe	21
PID 3016 wrote to memory of 2672	3016	rmass.exe	29
PID 3016 wrote to memory of 2672	3016	rmass.exe	29
PID 3016 wrote to memory of 2672	3016	rmass.exe	29
PID 3016 wrote to memory of 2672	3016	rmass.exe	29

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

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1172
- C:\Users\Admin\AppData\Local\Temp\7b8df1e07bd10d0ef2678749ad73392cee7b264ce4810936d70b89db75acb8a4.exe
  "C:\Users\Admin\AppData\Local\Temp\7b8df1e07bd10d0ef2678749ad73392cee7b264ce4810936d70b89db75acb8a4.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2156
- - 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:3016
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2672

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
558a34338a6df72f97a233e191b10f6e

SHA1
17081ec033268ab4f779638933d26fcbe20b2059

SHA256
38da1177ba0a8ed4091bc436199aeafb16f14c3979e9c4b8345d8d4396bf0a43

SHA512
271ca471ab77f886123483e53dfe02fc31bcb5a5b8d4f32c7eb666067e9e1d111364588da0ba66c5ccd6414d0d249b75cdf564bae74ccb198536f4b27dd858a4

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

Filesize
25KB

MD5
e4724450b04e961a3fd1802e7dc9fc4d

SHA1
9e2cad7c09edbcd7f4cb14d16c09bfb532a988ff

SHA256
a456771ed25d4ed0bf283fdb3478ea01adea1655363d8fcadacc56fdd3e88ad6

SHA512
c9120913cd53c9ec67661e7ff4106eef6d9b050f1d411a73b22eefc955b1a7250502488c27a495d7299813faf4491fd8f677f72253e33eda78ac0a1fc079344b

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
22KB

MD5
842108f1e17b6f54d7e243ab26210801

SHA1
37cf3f56e2d5d0a2b091d5f180d4e0a89f5c0428

SHA256
7b8df1e07bd10d0ef2678749ad73392cee7b264ce4810936d70b89db75acb8a4

SHA512
f7b90da38256b04b1f6b950a206732994662fea9accb1851b45d51f5cf16ee217411b3e7ae67762cb6aef134a2d556ea39c34d03fe2a10997f30210aeafdda18

Download Submit
memory/2156-12-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2156-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2156-5-0x0000000000360000-0x0000000000371000-memory.dmp

Filesize
68KB

Download
memory/2672-62-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2672-27-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3016-25-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3016-26-0x0000000000360000-0x0000000000371000-memory.dmp

Filesize
68KB

Download
memory/3016-61-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3016-101-0x0000000000360000-0x0000000000371000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads