da5592353556df24a82b7c96b111fe38a39a0c4fdb1b25f5689913db7c2b3b8b

Analysis

max time kernel
149s
max time network
125s
platform
windows7_x64
resource
win7-20231023-en
resource tags

arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
submitted
17/11/2023, 16:22

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General

Target

NEAS.f1612f46f423f4ba8a460692c3876938.exe
Size

19KB
MD5

f1612f46f423f4ba8a460692c3876938
SHA1

c4309d9f19542e6365f7f501cfcb7bd532cacfb5
SHA256

da5592353556df24a82b7c96b111fe38a39a0c4fdb1b25f5689913db7c2b3b8b
SHA512

2c19224beda09928864ce7eca312b0a63ac812e94bef0e423aa5aea447d4c7bad5473bd07c752b3a4896895010358c6d8698de4c1d649ae0beff45766753664e
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvX+9BY:rRkiLw3HsDSARGG/O9W

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\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
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "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 (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{41484C42-5259-4a4f-4148-4C4252594a4f}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{41484C42-5259-4a4f-4148-4C4252594a4f}\StubPath = "C:\\Windows\\system32\\ahuy.exe"	rmass.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{41484C42-5259-4a4f-4148-4C4252594a4f}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{41484C42-5259-4a4f-4148-4C4252594a4f}\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

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
1916	rmass.exe
2112	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
2068	NEAS.f1612f46f423f4ba8a460692c3876938.exe
2068	NEAS.f1612f46f423f4ba8a460692c3876938.exe
1916	rmass.exe

UPX packed file 13 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2068-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x000a000000012025-4.dat	upx
behavioral1/memory/2112-25-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x000a000000012025-13.dat	upx
behavioral1/files/0x000a000000012025-12.dat	upx
behavioral1/memory/2068-11-0x0000000000320000-0x0000000000331000-memory.dmp	upx
behavioral1/memory/2068-10-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x000a000000012025-8.dat	upx
behavioral1/files/0x000a000000012025-6.dat	upx
behavioral1/memory/1916-24-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x000a000000012025-23.dat	upx
behavioral1/files/0x000a000000012025-22.dat	upx
behavioral1/memory/1916-59-0x0000000000400000-0x0000000000411000-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
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
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

Drops file in System32 directory 12 IoCs

description	ioc	Process
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 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	NEAS.f1612f46f423f4ba8a460692c3876938.exe
File opened for modification	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\ahuy.exe	rmass.exe
File created	C:\Windows\SysWOW64\RECOVER32.DLL	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	rmass.exe
File created	C:\Windows\SysWOW64\rmass.exe	NEAS.f1612f46f423f4ba8a460692c3876938.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
1916	rmass.exe
1916	rmass.exe
1916	rmass.exe
2112	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2068	NEAS.f1612f46f423f4ba8a460692c3876938.exe
Token: SeDebugPrivilege	1916	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2068 wrote to memory of 1916	2068	NEAS.f1612f46f423f4ba8a460692c3876938.exe	28
PID 2068 wrote to memory of 1916	2068	NEAS.f1612f46f423f4ba8a460692c3876938.exe	28
PID 2068 wrote to memory of 1916	2068	NEAS.f1612f46f423f4ba8a460692c3876938.exe	28
PID 2068 wrote to memory of 1916	2068	NEAS.f1612f46f423f4ba8a460692c3876938.exe	28
PID 1916 wrote to memory of 420	1916	rmass.exe	3
PID 1916 wrote to memory of 1404	1916	rmass.exe	12
PID 1916 wrote to memory of 2112	1916	rmass.exe	29
PID 1916 wrote to memory of 2112	1916	rmass.exe	29
PID 1916 wrote to memory of 2112	1916	rmass.exe	29
PID 1916 wrote to memory of 2112	1916	rmass.exe	29

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

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1404
- C:\Users\Admin\AppData\Local\Temp\NEAS.f1612f46f423f4ba8a460692c3876938.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.f1612f46f423f4ba8a460692c3876938.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2068
- - 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:1916
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2112

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

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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
21KB

MD5
dfbaf179755b380297978c527091009d

SHA1
fa5898ddefa1e2864b6a72a2b3ba5926149782c4

SHA256
4833626057b5d0f4d07d2e0d37fd721ddc7b48418a8b75b3f9d174c18d6eae77

SHA512
f5ab698138673169505c54be8730d7a838c943c8043f547914bf298d7a1c5085311a56319f0b2c701b2380a3c6c4133fc46bdb396ffd9ecff4e1887d65b09516

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

Filesize
22KB

MD5
c0548a053cc909399a4a815498103615

SHA1
e47683d4cef6cc4d4024e18483a643f7db9a89a5

SHA256
2d689c8ddceb7506850d7ba3262cdde9c369b5117f47da01579b0649751ffb91

SHA512
b66897cdcb13be0715f2a6c9571c68e5d6ef14cee8ead4b766c95d33534b369889c6f73ee66d92cc054552d8f100c05b65727ca9dddd54370b90a0d5469cf93b

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

Filesize
19KB

MD5
f1612f46f423f4ba8a460692c3876938

SHA1
c4309d9f19542e6365f7f501cfcb7bd532cacfb5

SHA256
da5592353556df24a82b7c96b111fe38a39a0c4fdb1b25f5689913db7c2b3b8b

SHA512
2c19224beda09928864ce7eca312b0a63ac812e94bef0e423aa5aea447d4c7bad5473bd07c752b3a4896895010358c6d8698de4c1d649ae0beff45766753664e

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

Filesize
19KB

MD5
f1612f46f423f4ba8a460692c3876938

SHA1
c4309d9f19542e6365f7f501cfcb7bd532cacfb5

SHA256
da5592353556df24a82b7c96b111fe38a39a0c4fdb1b25f5689913db7c2b3b8b

SHA512
2c19224beda09928864ce7eca312b0a63ac812e94bef0e423aa5aea447d4c7bad5473bd07c752b3a4896895010358c6d8698de4c1d649ae0beff45766753664e

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

Filesize
19KB

MD5
f1612f46f423f4ba8a460692c3876938

SHA1
c4309d9f19542e6365f7f501cfcb7bd532cacfb5

SHA256
da5592353556df24a82b7c96b111fe38a39a0c4fdb1b25f5689913db7c2b3b8b

SHA512
2c19224beda09928864ce7eca312b0a63ac812e94bef0e423aa5aea447d4c7bad5473bd07c752b3a4896895010358c6d8698de4c1d649ae0beff45766753664e

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

Filesize
19KB

MD5
f1612f46f423f4ba8a460692c3876938

SHA1
c4309d9f19542e6365f7f501cfcb7bd532cacfb5

SHA256
da5592353556df24a82b7c96b111fe38a39a0c4fdb1b25f5689913db7c2b3b8b

SHA512
2c19224beda09928864ce7eca312b0a63ac812e94bef0e423aa5aea447d4c7bad5473bd07c752b3a4896895010358c6d8698de4c1d649ae0beff45766753664e

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
f1612f46f423f4ba8a460692c3876938

SHA1
c4309d9f19542e6365f7f501cfcb7bd532cacfb5

SHA256
da5592353556df24a82b7c96b111fe38a39a0c4fdb1b25f5689913db7c2b3b8b

SHA512
2c19224beda09928864ce7eca312b0a63ac812e94bef0e423aa5aea447d4c7bad5473bd07c752b3a4896895010358c6d8698de4c1d649ae0beff45766753664e

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
19KB

MD5
f1612f46f423f4ba8a460692c3876938

SHA1
c4309d9f19542e6365f7f501cfcb7bd532cacfb5

SHA256
da5592353556df24a82b7c96b111fe38a39a0c4fdb1b25f5689913db7c2b3b8b

SHA512
2c19224beda09928864ce7eca312b0a63ac812e94bef0e423aa5aea447d4c7bad5473bd07c752b3a4896895010358c6d8698de4c1d649ae0beff45766753664e

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
19KB

MD5
f1612f46f423f4ba8a460692c3876938

SHA1
c4309d9f19542e6365f7f501cfcb7bd532cacfb5

SHA256
da5592353556df24a82b7c96b111fe38a39a0c4fdb1b25f5689913db7c2b3b8b

SHA512
2c19224beda09928864ce7eca312b0a63ac812e94bef0e423aa5aea447d4c7bad5473bd07c752b3a4896895010358c6d8698de4c1d649ae0beff45766753664e

Download Submit
memory/1916-24-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1916-59-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1916-91-0x00000000003E0000-0x00000000003F1000-memory.dmp

Filesize
68KB

Download
memory/2068-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2068-10-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2068-11-0x0000000000320000-0x0000000000331000-memory.dmp

Filesize
68KB

Download
memory/2068-82-0x0000000000320000-0x0000000000331000-memory.dmp

Filesize
68KB

Download
memory/2112-25-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download