3aadf1c2d7b6a8d4faa78f201697a4f21edef433e73b50d618801375ada7c719

Analysis

max time kernel
167s
max time network
139s
platform
windows7_x64
resource
win7-20231025-en
resource tags

arch:x64arch:x86image:win7-20231025-enlocale:en-usos:windows7-x64system
submitted
01-11-2023 14:10

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General

Target

NEAS.62b6825d1cda4ce64401571f4fd1fba0.exe
Size

21KB
MD5

62b6825d1cda4ce64401571f4fd1fba0
SHA1

f259ca43616925f59a2202bf54a928cef9776fc2
SHA256

3aadf1c2d7b6a8d4faa78f201697a4f21edef433e73b50d618801375ada7c719
SHA512

b8dcf0629a683ed8ab70b877204616a5ed54b1d93a93331be7b9e5bbf37c0df9530a423a11a38690770b5d384aa2095e6a2faab26ecbfa93a9ba92876ab2a50d
SSDEEP

384:jIz4cOeIQLcDupwRBMgxgOxfzq/1pL7g4X5hPbLWKMC9bTDClcRQ6TtJMqkfQVmO:jIUcBIQIDuWY2gOxbqz7g4LLZ9rZTDk0

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\{50545A53-464b-4946-5054-5A53464B4946}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{50545A53-464b-4946-5054-5A53464B4946}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{50545A53-464b-4946-5054-5A53464B4946}\StubPath = "C:\\Windows\\system32\\ahuy.exe"	rmass.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{50545A53-464b-4946-5054-5A53464B4946}	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
480	rmass.exe
1876	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
1916	NEAS.62b6825d1cda4ce64401571f4fd1fba0.exe
1916	NEAS.62b6825d1cda4ce64401571f4fd1fba0.exe
480	rmass.exe

UPX packed file 11 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x0009000000012024-1.dat	upx
behavioral1/memory/1916-2-0x0000000000020000-0x0000000000031000-memory.dmp	upx
behavioral1/files/0x0009000000012024-4.dat	upx
behavioral1/files/0x0009000000012024-10.dat	upx
behavioral1/memory/480-11-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x0009000000012024-7.dat	upx
behavioral1/files/0x0009000000012024-12.dat	upx
behavioral1/files/0x0009000000012024-17.dat	upx
behavioral1/files/0x0009000000012024-22.dat	upx
behavioral1/memory/480-47-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/1876-56-0x0000000000400000-0x0000000000411000-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 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\RECOVER32.DLL	rmass.exe
File opened for modification	C:\Windows\SysWOW64\winrnt.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	NEAS.62b6825d1cda4ce64401571f4fd1fba0.exe
File created	C:\Windows\SysWOW64\rmass.exe	NEAS.62b6825d1cda4ce64401571f4fd1fba0.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\ahuy.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\RECOVER32.DLL	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
480	rmass.exe
480	rmass.exe
480	rmass.exe
1876	rmass.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	480	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1916 wrote to memory of 480	1916	NEAS.62b6825d1cda4ce64401571f4fd1fba0.exe	28
PID 1916 wrote to memory of 480	1916	NEAS.62b6825d1cda4ce64401571f4fd1fba0.exe	28
PID 1916 wrote to memory of 480	1916	NEAS.62b6825d1cda4ce64401571f4fd1fba0.exe	28
PID 1916 wrote to memory of 480	1916	NEAS.62b6825d1cda4ce64401571f4fd1fba0.exe	28
PID 480 wrote to memory of 420	480	rmass.exe	3
PID 480 wrote to memory of 1260	480	rmass.exe	12
PID 480 wrote to memory of 1876	480	rmass.exe	29
PID 480 wrote to memory of 1876	480	rmass.exe	29
PID 480 wrote to memory of 1876	480	rmass.exe	29
PID 480 wrote to memory of 1876	480	rmass.exe	29

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

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1260
- C:\Users\Admin\AppData\Local\Temp\NEAS.62b6825d1cda4ce64401571f4fd1fba0.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.62b6825d1cda4ce64401571f4fd1fba0.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:1916
- - 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
    - 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:480
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:1876

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
b7337570207294a4594c0626c95c7c9f

SHA1
cf791a7b0aeeb16de39973927b94864af9b8b98d

SHA256
adacd9838452f713cde7d41823b9f4fe5d21a392a4f466b11a0fbef66d4fc886

SHA512
2143cb978afdd08ae3dd2926c103a928b1ae61a351dac3faea3ace2c29226ebb0e2dd3158491524ee3701c71137258feaf1d59129c4244b38afbfb446247d021

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

Filesize
22KB

MD5
7c8abc89bbe4938c4026899349dd8dc9

SHA1
da6a220693544afb5f8934ad44559c26858f2756

SHA256
a067d00dd3e06f722ce867ec50fdb709f4381aa195c2626fe5a5170d3af38b6a

SHA512
cc73f7a04352f6d208f79439f6bb708195d7ee15ed08bc06eeb12658edff1d95a9fa3300e09a12144b1bc2ed0ee178ac5f7f927a1b14df062b888441451d67b0

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

Filesize
19KB

MD5
f19a54bba44cac56ed014dcccfbaf1d5

SHA1
0956ea9f2a196c12a003e9ba0df5fd8de58a3ee1

SHA256
7a76d16ae45d1aee7fec5d09132026607a4265b451649761c0328aa9db0ee981

SHA512
7dfbd06894133953d2d8e7a31434df5d7039f0fc5651006530df567d45528df32b8817c6f3212d189dbd9c83ad17ea4e0f08d1fb628789649239e28e35461b3e

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

Filesize
19KB

MD5
f19a54bba44cac56ed014dcccfbaf1d5

SHA1
0956ea9f2a196c12a003e9ba0df5fd8de58a3ee1

SHA256
7a76d16ae45d1aee7fec5d09132026607a4265b451649761c0328aa9db0ee981

SHA512
7dfbd06894133953d2d8e7a31434df5d7039f0fc5651006530df567d45528df32b8817c6f3212d189dbd9c83ad17ea4e0f08d1fb628789649239e28e35461b3e

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

Filesize
19KB

MD5
f19a54bba44cac56ed014dcccfbaf1d5

SHA1
0956ea9f2a196c12a003e9ba0df5fd8de58a3ee1

SHA256
7a76d16ae45d1aee7fec5d09132026607a4265b451649761c0328aa9db0ee981

SHA512
7dfbd06894133953d2d8e7a31434df5d7039f0fc5651006530df567d45528df32b8817c6f3212d189dbd9c83ad17ea4e0f08d1fb628789649239e28e35461b3e

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

Filesize
19KB

MD5
f19a54bba44cac56ed014dcccfbaf1d5

SHA1
0956ea9f2a196c12a003e9ba0df5fd8de58a3ee1

SHA256
7a76d16ae45d1aee7fec5d09132026607a4265b451649761c0328aa9db0ee981

SHA512
7dfbd06894133953d2d8e7a31434df5d7039f0fc5651006530df567d45528df32b8817c6f3212d189dbd9c83ad17ea4e0f08d1fb628789649239e28e35461b3e

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
f19a54bba44cac56ed014dcccfbaf1d5

SHA1
0956ea9f2a196c12a003e9ba0df5fd8de58a3ee1

SHA256
7a76d16ae45d1aee7fec5d09132026607a4265b451649761c0328aa9db0ee981

SHA512
7dfbd06894133953d2d8e7a31434df5d7039f0fc5651006530df567d45528df32b8817c6f3212d189dbd9c83ad17ea4e0f08d1fb628789649239e28e35461b3e

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
19KB

MD5
f19a54bba44cac56ed014dcccfbaf1d5

SHA1
0956ea9f2a196c12a003e9ba0df5fd8de58a3ee1

SHA256
7a76d16ae45d1aee7fec5d09132026607a4265b451649761c0328aa9db0ee981

SHA512
7dfbd06894133953d2d8e7a31434df5d7039f0fc5651006530df567d45528df32b8817c6f3212d189dbd9c83ad17ea4e0f08d1fb628789649239e28e35461b3e

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
19KB

MD5
f19a54bba44cac56ed014dcccfbaf1d5

SHA1
0956ea9f2a196c12a003e9ba0df5fd8de58a3ee1

SHA256
7a76d16ae45d1aee7fec5d09132026607a4265b451649761c0328aa9db0ee981

SHA512
7dfbd06894133953d2d8e7a31434df5d7039f0fc5651006530df567d45528df32b8817c6f3212d189dbd9c83ad17ea4e0f08d1fb628789649239e28e35461b3e

Download Submit
memory/480-11-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/480-47-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/480-48-0x00000000002B0000-0x00000000002C1000-memory.dmp

Filesize
68KB

Download
memory/1876-56-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1916-9-0x0000000000400000-0x0000000000403000-memory.dmp

Filesize
12KB

Download
memory/1916-2-0x0000000000020000-0x0000000000031000-memory.dmp

Filesize
68KB

Download
memory/1916-8-0x0000000000020000-0x0000000000031000-memory.dmp

Filesize
68KB

Download