a0ddd5f4e7afc3dd5d20a063dd441eb899443de24c04c9e8909cc77767aaefa3

General

Target

15ab88c584de8b200d16350f4277b3b4.exe
Size

20KB
MD5

15ab88c584de8b200d16350f4277b3b4
SHA1

5c0cf2f50b292a1ced825295daff10eece72fddd
SHA256

a0ddd5f4e7afc3dd5d20a063dd441eb899443de24c04c9e8909cc77767aaefa3
SHA512

b20b12e537d4faf68581fd0214dfbaf028293713adbb50c0bc19361c2915dc65d5abad68bfd2808de101f5b0c70d8ee95238b03735ea1bed4a213365708ff219
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvXfP/gXBhGzf:rRkiLw3HsDSARGG/fycj

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\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

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\{43414C4B-4853-594d-4341-4C4B4853594d}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{43414C4B-4853-594d-4341-4C4B4853594d}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{43414C4B-4853-594d-4341-4C4B4853594d}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{43414C4B-4853-594d-4341-4C4B4853594d}\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
2552	rmass.exe
2732	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
2232	15ab88c584de8b200d16350f4277b3b4.exe
2232	15ab88c584de8b200d16350f4277b3b4.exe
2552	rmass.exe

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000d00000001224d-13.dat	upx
behavioral1/files/0x000d00000001224d-12.dat	upx
behavioral1/memory/2732-26-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x000d00000001224d-7.dat	upx
behavioral1/memory/2232-5-0x0000000000320000-0x0000000000331000-memory.dmp	upx
behavioral1/files/0x000d00000001224d-24.dat	upx
behavioral1/memory/2552-23-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2232-3-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2552-60-0x0000000000400000-0x0000000000411000-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 created	C:\Windows\SysWOW64\RECOVER32.DLL	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	15ab88c584de8b200d16350f4277b3b4.exe
File created	C:\Windows\SysWOW64\rmass.exe	15ab88c584de8b200d16350f4277b3b4.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\ntdbg.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

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
2552	rmass.exe
2552	rmass.exe
2552	rmass.exe
2732	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2232	15ab88c584de8b200d16350f4277b3b4.exe
Token: SeDebugPrivilege	2552	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2232 wrote to memory of 2552	2232	15ab88c584de8b200d16350f4277b3b4.exe	15
PID 2232 wrote to memory of 2552	2232	15ab88c584de8b200d16350f4277b3b4.exe	15
PID 2232 wrote to memory of 2552	2232	15ab88c584de8b200d16350f4277b3b4.exe	15
PID 2232 wrote to memory of 2552	2232	15ab88c584de8b200d16350f4277b3b4.exe	15
PID 2552 wrote to memory of 436	2552	rmass.exe	3
PID 2552 wrote to memory of 1240	2552	rmass.exe	19
PID 2552 wrote to memory of 2732	2552	rmass.exe	14
PID 2552 wrote to memory of 2732	2552	rmass.exe	14
PID 2552 wrote to memory of 2732	2552	rmass.exe	14
PID 2552 wrote to memory of 2732	2552	rmass.exe	14

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

C:\Windows\SysWOW64\rmass.exe
--k33p
1⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:2732

C:\Windows\SysWOW64\rmass.exe
"C:\Windows\system32\rmass.exe"
1⤵
- 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:2552

C:\Users\Admin\AppData\Local\Temp\15ab88c584de8b200d16350f4277b3b4.exe
"C:\Users\Admin\AppData\Local\Temp\15ab88c584de8b200d16350f4277b3b4.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2232

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1240

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\ntdbg.exe

Filesize
9KB

MD5
282e95532155f6a7201e7ff60933fa2b

SHA1
3a814bc29ed14bfd5c6f9f50a2cfaafc56e69d1b

SHA256
404e6183ca6f0593117e7a7f0fddcf7c77168b2c31c7ad75b5b574513fbcfe34

SHA512
d88b13c6714187d6ef34a080d6f611b0cb20339423d04ebb3ac0b0aecf6b2ff59c3d40397b39f0f0c21a037fbd6b73102dde6751de1dee0e446dfa0f70844ee4

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

Filesize
15KB

MD5
18103b1a8eb2133376fd1a1515f9b78f

SHA1
51c7b8380d5e2d8b4dc6f57163a4cf5eeb5dd4e2

SHA256
46b9f1bdc8eb73e0d57fd3b41c05a927ac4c0e0f32b494effc056c52d698a61e

SHA512
980cc1a1cab6dcb82b090317f0cd8595504b6405d4f01d4f6837792f929f660de058e867d2820cb6fe60ec87896bb995ca282aaadab691888b92cd209135213e

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

Filesize
20KB

MD5
15ab88c584de8b200d16350f4277b3b4

SHA1
5c0cf2f50b292a1ced825295daff10eece72fddd

SHA256
a0ddd5f4e7afc3dd5d20a063dd441eb899443de24c04c9e8909cc77767aaefa3

SHA512
b20b12e537d4faf68581fd0214dfbaf028293713adbb50c0bc19361c2915dc65d5abad68bfd2808de101f5b0c70d8ee95238b03735ea1bed4a213365708ff219

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

Filesize
1KB

MD5
471caccfabdfb64c1f3939f7c9c57e3e

SHA1
9c1c6ede1e5082a4d7181ac29ca86ad0fbe37e4b

SHA256
e3681bb1a7bbb4bb336c96d7a317233600ff42ae0062965b4ab8687b77142a8a

SHA512
bf79057b31a06a5e1539e3d0063d7c683165486fb9f9159825d238c11cdbc75e8027f74802ece26549680d8de97f0aa9da36296e164e8cfc82bc3a54a72c365c

Download Submit
memory/2232-5-0x0000000000320000-0x0000000000331000-memory.dmp

Filesize
68KB

Download
memory/2232-3-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2552-25-0x0000000000320000-0x0000000000331000-memory.dmp

Filesize
68KB

Download
memory/2552-23-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2552-60-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2732-26-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads