6f363e914c2b4f121513e2dc9988001d09ce014c20a307e86d8fd039acf23c5a

Analysis

max time kernel
225s
max time network
156s
platform
windows7_x64
resource
win7-20231023-en
resource tags

arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
submitted
17/11/2023, 17:25

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

NEAS.58129d574276d13cf0744a87d51ee28a.exe
Size

19KB
MD5

58129d574276d13cf0744a87d51ee28a
SHA1

d6ea309607c33a4b064700a4f8b521e5abca5642
SHA256

6f363e914c2b4f121513e2dc9988001d09ce014c20a307e86d8fd039acf23c5a
SHA512

2bfb0d2d3d3ece406c51b83f443f2554679c308463ce934eaa714e9f933f542c31960e205c34df80918af088e077935b62bb006c4b3f05e4ea5d34e7870080aa
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvXO1Bf:rRkiLw3HsDSARGG/WBf

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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{41574448-5458-4553-4157-444854584553}\StubPath = "C:\\Windows\\system32\\ahuy.exe"	rmass.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{41574448-5458-4553-4157-444854584553}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{41574448-5458-4553-4157-444854584553}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{41574448-5458-4553-4157-444854584553}\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\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
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe	rmass.exe

Executes dropped EXE 2 IoCs

pid	Process
3044	rmass.exe
2536	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
2576	NEAS.58129d574276d13cf0744a87d51ee28a.exe
2576	NEAS.58129d574276d13cf0744a87d51ee28a.exe
3044	rmass.exe

UPX packed file 13 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2576-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2576-5-0x00000000002B0000-0x00000000002C1000-memory.dmp	upx
behavioral1/files/0x0003000000004ed7-4.dat	upx
behavioral1/memory/2576-6-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x0003000000004ed7-9.dat	upx
behavioral1/files/0x0003000000004ed7-10.dat	upx
behavioral1/memory/3044-20-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x0003000000004ed7-15.dat	upx
behavioral1/files/0x0003000000004ed7-14.dat	upx
behavioral1/files/0x0003000000004ed7-25.dat	upx
behavioral1/files/0x0003000000004ed7-26.dat	upx
behavioral1/memory/3044-39-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2536-61-0x0000000000400000-0x0000000000411000-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}\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

description	ioc	Process
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	rmass.exe
File created	C:\Windows\SysWOW64\rmass.exe	NEAS.58129d574276d13cf0744a87d51ee28a.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\idbg32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	NEAS.58129d574276d13cf0744a87d51ee28a.exe
File opened for modification	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File created	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File opened for modification	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 4 IoCs

pid	Process
3044	rmass.exe
3044	rmass.exe
3044	rmass.exe
2536	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2576	NEAS.58129d574276d13cf0744a87d51ee28a.exe
Token: SeDebugPrivilege	3044	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2576 wrote to memory of 3044	2576	NEAS.58129d574276d13cf0744a87d51ee28a.exe	28
PID 2576 wrote to memory of 3044	2576	NEAS.58129d574276d13cf0744a87d51ee28a.exe	28
PID 2576 wrote to memory of 3044	2576	NEAS.58129d574276d13cf0744a87d51ee28a.exe	28
PID 2576 wrote to memory of 3044	2576	NEAS.58129d574276d13cf0744a87d51ee28a.exe	28
PID 3044 wrote to memory of 420	3044	rmass.exe	23
PID 3044 wrote to memory of 1192	3044	rmass.exe	8
PID 3044 wrote to memory of 2536	3044	rmass.exe	29
PID 3044 wrote to memory of 2536	3044	rmass.exe	29
PID 3044 wrote to memory of 2536	3044	rmass.exe	29
PID 3044 wrote to memory of 2536	3044	rmass.exe	29

C:\Users\Admin\AppData\Local\Temp\NEAS.58129d574276d13cf0744a87d51ee28a.exe
"C:\Users\Admin\AppData\Local\Temp\NEAS.58129d574276d13cf0744a87d51ee28a.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2576
- C:\Windows\SysWOW64\rmass.exe
  "C:\Windows\system32\rmass.exe"
  2⤵
  - 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:3044
- - C:\Windows\SysWOW64\rmass.exe
    --k33p
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    PID:2536

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1192

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:420

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Windows\SysWOW64\RECOVER32.DLL

Filesize
5KB

MD5
2b2c28a7a01f9584fe220ef84003427f

SHA1
5fc023df0b5064045eb8de7f2dbe26f07f6fec70

SHA256
9e00af53b1d0c0f5270d94a666d95aa7b4dcb9fea49487c210c055c9dcfcc9eb

SHA512
39192a8a91dec1abff25af8dac0cf39da4dfd51b3fb4f1ef0b4e776185d4280fbe8387c2ea778da7bbf2ce288b0bce4d23cbe8d9e87bbd250159044f5adbac78

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

Filesize
22KB

MD5
f723b823f5487d7830ac3f777cf1d4eb

SHA1
90286a1cc7762118fcf0400079edd31eaade5bb2

SHA256
6af6a9dffc7cf652d2572f07d44c4cbc08e8394d5b5a2b5805f8c3718032267a

SHA512
f7ceee31e3b10d5adae91828e918f4d2e79693e12bd41d26f7e10fb638401fa7cc27b5be0778b150a5553efcf29100330b73eeed694b5820999e9d362091eb25

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

Filesize
23KB

MD5
6b4622fae8a00397bb8c61733253e57c

SHA1
6972e7308b843220ec5bb21697683547b5348ab4

SHA256
995e5dcc6f15d9d901a4012ac5a928d5c471122c253ff7955f70be0b5bba24d8

SHA512
925f2dc6ccc8e2fa303062741535a5f7e4b225f9bb1dd1c596aff5ac970c28cd7c776be5571d7e6ed9197b9bc20126a82a7544fe9c77d8ed4c42ce3eedf0be9d

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

Filesize
19KB

MD5
58129d574276d13cf0744a87d51ee28a

SHA1
d6ea309607c33a4b064700a4f8b521e5abca5642

SHA256
6f363e914c2b4f121513e2dc9988001d09ce014c20a307e86d8fd039acf23c5a

SHA512
2bfb0d2d3d3ece406c51b83f443f2554679c308463ce934eaa714e9f933f542c31960e205c34df80918af088e077935b62bb006c4b3f05e4ea5d34e7870080aa

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

Filesize
19KB

MD5
58129d574276d13cf0744a87d51ee28a

SHA1
d6ea309607c33a4b064700a4f8b521e5abca5642

SHA256
6f363e914c2b4f121513e2dc9988001d09ce014c20a307e86d8fd039acf23c5a

SHA512
2bfb0d2d3d3ece406c51b83f443f2554679c308463ce934eaa714e9f933f542c31960e205c34df80918af088e077935b62bb006c4b3f05e4ea5d34e7870080aa

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

Filesize
19KB

MD5
58129d574276d13cf0744a87d51ee28a

SHA1
d6ea309607c33a4b064700a4f8b521e5abca5642

SHA256
6f363e914c2b4f121513e2dc9988001d09ce014c20a307e86d8fd039acf23c5a

SHA512
2bfb0d2d3d3ece406c51b83f443f2554679c308463ce934eaa714e9f933f542c31960e205c34df80918af088e077935b62bb006c4b3f05e4ea5d34e7870080aa

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

Filesize
19KB

MD5
58129d574276d13cf0744a87d51ee28a

SHA1
d6ea309607c33a4b064700a4f8b521e5abca5642

SHA256
6f363e914c2b4f121513e2dc9988001d09ce014c20a307e86d8fd039acf23c5a

SHA512
2bfb0d2d3d3ece406c51b83f443f2554679c308463ce934eaa714e9f933f542c31960e205c34df80918af088e077935b62bb006c4b3f05e4ea5d34e7870080aa

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
19KB

MD5
58129d574276d13cf0744a87d51ee28a

SHA1
d6ea309607c33a4b064700a4f8b521e5abca5642

SHA256
6f363e914c2b4f121513e2dc9988001d09ce014c20a307e86d8fd039acf23c5a

SHA512
2bfb0d2d3d3ece406c51b83f443f2554679c308463ce934eaa714e9f933f542c31960e205c34df80918af088e077935b62bb006c4b3f05e4ea5d34e7870080aa

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
19KB

MD5
58129d574276d13cf0744a87d51ee28a

SHA1
d6ea309607c33a4b064700a4f8b521e5abca5642

SHA256
6f363e914c2b4f121513e2dc9988001d09ce014c20a307e86d8fd039acf23c5a

SHA512
2bfb0d2d3d3ece406c51b83f443f2554679c308463ce934eaa714e9f933f542c31960e205c34df80918af088e077935b62bb006c4b3f05e4ea5d34e7870080aa

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
19KB

MD5
58129d574276d13cf0744a87d51ee28a

SHA1
d6ea309607c33a4b064700a4f8b521e5abca5642

SHA256
6f363e914c2b4f121513e2dc9988001d09ce014c20a307e86d8fd039acf23c5a

SHA512
2bfb0d2d3d3ece406c51b83f443f2554679c308463ce934eaa714e9f933f542c31960e205c34df80918af088e077935b62bb006c4b3f05e4ea5d34e7870080aa

Download Submit
memory/2536-61-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2576-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2576-6-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2576-5-0x00000000002B0000-0x00000000002C1000-memory.dmp

Filesize
68KB

Download
memory/3044-20-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3044-39-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download