e114cb2d14f88755e603602c42fa5b46a1ba7697fc37b7a84b4ee7deb511cacc

General

Target

e114cb2d14f88755e603602c42fa5b46a1ba7697fc37b7a84b4ee7deb511cacc.exe
Size

24KB
MD5

534afd258d739b9972ae586c0ac44dd3
SHA1

f4e40f614f2b4ab7cddde49aad33697efe85f965
SHA256

e114cb2d14f88755e603602c42fa5b46a1ba7697fc37b7a84b4ee7deb511cacc
SHA512

65ff671faa8d6613d7531382c0a8fc9ebff8dfc4d2f78fb3fb48caaa7e0c39290c1e73a08f2076b2cce989a2fccab42e73b22851d0855ae022f7522da0effd56
SSDEEP

384:jIz4QFC6l7f3qw+GyMjkNFeIcs1zPR+vJGRzUtV+/O0O+8oUfg:jIUmC6NfIWwNAp4dJRzUtV+/VJsg

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

Processes:

rmass.exe

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

Processes:

rmass.exe

description ioc process

File opened for modification C:\Windows\system32\drivers\etc\hosts rmass.exe

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

Processes:

rmass.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{50544D59-4456-4d4b-5054-4D5944564d4b}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{50544D59-4456-4d4b-5054-4D5944564d4b}\StubPath = "C:\\Windows\\system32\\ahuy.exe"	rmass.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{50544D59-4456-4d4b-5054-4D5944564d4b}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{50544D59-4456-4d4b-5054-4D5944564d4b}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe

Sets file execution options in registry 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

rmass.exe

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

Processes:

rmass.exermass.exe

pid process

3456 rmass.exe
1072 rmass.exe

pid	process
3456	rmass.exe
1072	rmass.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
C:\Windows\SysWOW64\rmass.exe	upx
behavioral2/memory/3456-5-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/1072-15-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/3456-76-0x0000000000400000-0x0000000000411000-memory.dmp	upx

Windows security modification 2 TTPs 4 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

rmass.exe

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

Processes:

rmass.exe

description	ioc	process
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
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

Drops file in System32 directory 12 IoCs

Processes:

rmass.exee114cb2d14f88755e603602c42fa5b46a1ba7697fc37b7a84b4ee7deb511cacc.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\ahuy.exe	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\rmass.exe	e114cb2d14f88755e603602c42fa5b46a1ba7697fc37b7a84b4ee7deb511cacc.exe
File created	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File created	C:\Windows\SysWOW64\ahuy.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\RECOVER32.DLL	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 created	C:\Windows\SysWOW64\rmass.exe	e114cb2d14f88755e603602c42fa5b46a1ba7697fc37b7a84b4ee7deb511cacc.exe
File opened for modification	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe

Drops file in Program Files directory 3 IoCs

Processes:

rmass.exe

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

Processes:

rmass.exermass.exe

pid process

3456 rmass.exe
3456 rmass.exe
3456 rmass.exe
3456 rmass.exe
3456 rmass.exe
3456 rmass.exe
1072 rmass.exe
1072 rmass.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

rmass.exe

description pid process

Token: SeDebugPrivilege 3456 rmass.exe

pid	process
3456	rmass.exe
3456	rmass.exe
3456	rmass.exe
3456	rmass.exe
3456	rmass.exe
3456	rmass.exe
1072	rmass.exe
1072	rmass.exe

description	pid	process
Token: SeDebugPrivilege	3456	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

e114cb2d14f88755e603602c42fa5b46a1ba7697fc37b7a84b4ee7deb511cacc.exermass.exe

description	pid	process	target process
PID 2976 wrote to memory of 3456	2976	e114cb2d14f88755e603602c42fa5b46a1ba7697fc37b7a84b4ee7deb511cacc.exe	rmass.exe
PID 2976 wrote to memory of 3456	2976	e114cb2d14f88755e603602c42fa5b46a1ba7697fc37b7a84b4ee7deb511cacc.exe	rmass.exe
PID 2976 wrote to memory of 3456	2976	e114cb2d14f88755e603602c42fa5b46a1ba7697fc37b7a84b4ee7deb511cacc.exe	rmass.exe
PID 3456 wrote to memory of 1072	3456	rmass.exe	rmass.exe
PID 3456 wrote to memory of 1072	3456	rmass.exe	rmass.exe
PID 3456 wrote to memory of 1072	3456	rmass.exe	rmass.exe
PID 3456 wrote to memory of 592	3456	rmass.exe	winlogon.exe
PID 3456 wrote to memory of 3424	3456	rmass.exe	Explorer.EXE

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

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3424

C:\Users\Admin\AppData\Local\Temp\e114cb2d14f88755e603602c42fa5b46a1ba7697fc37b7a84b4ee7deb511cacc.exe
"C:\Users\Admin\AppData\Local\Temp\e114cb2d14f88755e603602c42fa5b46a1ba7697fc37b7a84b4ee7deb511cacc.exe"
2⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2976

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:3456

C:\Windows\SysWOW64\rmass.exe
--k33p
4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:1072

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
24KB

MD5
6dbfffda92d74c36a96aebe58f782dbb

SHA1
d7965c7fef69027540c55788c2d20cfc8b01dcac

SHA256
8b0d48131e2b32db080a49a61df28ef878f59bf6ab7794b6028b318168a5bbb8

SHA512
4a91657d270e0aa6f98cf42f5f169ca086dcf3c7590b677a8792e358b3e21fa6806d9b71d19427c0f83b0918e12a459bdf11463a06b9e5dc0ea0c1230d729912

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

Filesize
25KB

MD5
c5f415c81ca847f4cf8007fadbd043ec

SHA1
698af900fb2f322e47e7f11357f7789e9c965f30

SHA256
4c7c3bf8c535c6b82e900481d6969b8ec089d1b55d8145abea569ed97e9c8b61

SHA512
ab32580a939fc824c3d9311a10367ad254458fd8e556cb0a8f8bdf9f0b439b61c4a1cd26f31d7376206019f6e972d98f349e6f62370e25fd77fa01d97c3eff20

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

Filesize
22KB

MD5
91c1c6c464fa49f4a9a210c9a6a94411

SHA1
7b24ea1235fae9c4c6fc8e94adce15f78883431c

SHA256
b3429696947f721597ed989495c1a251c157bf07c61338a3a552611b31479a29

SHA512
0beee56485c35de7a49c24fd6ebf7eb696f996e2e9a08e25561ce743924be36a648afb677feaa2f884436d9be1c9b8b2532f8ed11b44751024ca4153e12ddf4f

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/1072-15-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2976-2-0x0000000000400000-0x0000000000403000-memory.dmp

Filesize
12KB

Download
memory/3456-5-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3456-76-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads