f64f4c98c3ed3b6bddd386825eb449cbec31bb25a84729b768295f88402b7677

Analysis

max time kernel
156s
max time network
129s
platform
windows7_x64
resource
win7-20231025-en
resource tags

arch:x64arch:x86image:win7-20231025-enlocale:en-usos:windows7-x64system
submitted
17/11/2023, 00:42

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General

Target

NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe
Size

21KB
MD5

c57ead958ef99c2b4c140baa6ce333c0
SHA1

6bac44ca490c20f8600950e37bfe85285b4de282
SHA256

f64f4c98c3ed3b6bddd386825eb449cbec31bb25a84729b768295f88402b7677
SHA512

279d05564714e099574671cd9466002a443f6efe32cb21f066845ddd9f0a1fd9e67c7bad9ffa456905d1aec09773dfd429b5adc174d80e7f5f3bbcb3d5f2d35e
SSDEEP

384:jIz4sOPwP1mSKBmjpLxoYiekKrYGsUikOPkxOXayYl6mMyIzpegjX:jIUsddqUj4YilKrz4Pk4pYI9D

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
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{50545A53-464b-4946-5054-5A53464B4946}	rmass.exe
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

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
2360	rmass.exe
2832	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
2580	NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe
2580	NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe
2360	rmass.exe

UPX packed file 12 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000a000000012266-1.dat	upx
behavioral1/memory/2580-2-0x0000000000020000-0x0000000000031000-memory.dmp	upx
behavioral1/files/0x000a000000012266-7.dat	upx
behavioral1/files/0x000a000000012266-4.dat	upx
behavioral1/files/0x000a000000012266-10.dat	upx
behavioral1/memory/2580-9-0x0000000000020000-0x0000000000031000-memory.dmp	upx
behavioral1/files/0x000a000000012266-22.dat	upx
behavioral1/files/0x000a000000012266-21.dat	upx
behavioral1/files/0x000a000000012266-12.dat	upx
behavioral1/memory/2360-11-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2832-24-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2360-52-0x0000000000400000-0x0000000000411000-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}\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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\{BC84DF00-BC38-9902-8082-6FCBF2D87A0B}\012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345 = "a"	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\idbg32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	NEAS.c57ead958ef99c2b4c140baa6ce333c0.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\winrnt.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\aset32.exe	rmass.exe
File created	C:\Windows\SysWOW64\rmass.exe	NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\System\idbg32.exe	rmass.exe
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

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2360	rmass.exe
2360	rmass.exe
2360	rmass.exe
2832	rmass.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2360	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2580 wrote to memory of 2360	2580	NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe	28
PID 2580 wrote to memory of 2360	2580	NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe	28
PID 2580 wrote to memory of 2360	2580	NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe	28
PID 2580 wrote to memory of 2360	2580	NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe	28
PID 2360 wrote to memory of 424	2360	rmass.exe	3
PID 2360 wrote to memory of 1196	2360	rmass.exe	11
PID 2360 wrote to memory of 2832	2360	rmass.exe	29
PID 2360 wrote to memory of 2832	2360	rmass.exe	29
PID 2360 wrote to memory of 2832	2360	rmass.exe	29
PID 2360 wrote to memory of 2832	2360	rmass.exe	29

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:424

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1196
- C:\Users\Admin\AppData\Local\Temp\NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:2580
- - 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:2360
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2832

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
a43c4dde4cda9997195bfd741082eb1e

SHA1
2b10cd5a221161da1a327951bff70f7961fcaeb3

SHA256
a3744001db2d5152d7e8200729fadc76921c12e3fa1dd2e5fa9b7b2a18a7af85

SHA512
7972ff02d41b024ad7fc84e16993739962938ed0a7dfcf4b87b68c67536bc0380c3cde8bab8eef2658951799d38aa8f4e888b64acc080079d9db43ea401de522

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

Filesize
22KB

MD5
f957319116b86d85ed9dbeeec71a1e6e

SHA1
1bf11559cb48a857c5555e404997c21058f47d68

SHA256
eb78cf52238524bc8d00375355f56ce317aad21b73221c3197bab7fa40ac8fc2

SHA512
df1ba9e185532d03cffce6231ae16ce53f784525508118e63878b56f184c7a53d832f21a8bee973df91badb03997d1f6ded5d70b45a5b33d1e98a99bf2c3a03e

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

Filesize
19KB

MD5
aab73f099c13687484d94d91b431eb7a

SHA1
20588702447ca2fe4b29b5ad4381e9fd6415cd95

SHA256
9c86f4f520d1a90f9395ce38453db3fb0d716f52986af691467004bb52de4fec

SHA512
b2e4e44e39fcb6528c4490a2c976f4faa5a892e1f2b6b806a368fb856a2ef46416eb5a1dc9414113547063c2feed15c40b6060805466ca6a7d9fb71a7a02c388

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

Filesize
19KB

MD5
aab73f099c13687484d94d91b431eb7a

SHA1
20588702447ca2fe4b29b5ad4381e9fd6415cd95

SHA256
9c86f4f520d1a90f9395ce38453db3fb0d716f52986af691467004bb52de4fec

SHA512
b2e4e44e39fcb6528c4490a2c976f4faa5a892e1f2b6b806a368fb856a2ef46416eb5a1dc9414113547063c2feed15c40b6060805466ca6a7d9fb71a7a02c388

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

Filesize
19KB

MD5
aab73f099c13687484d94d91b431eb7a

SHA1
20588702447ca2fe4b29b5ad4381e9fd6415cd95

SHA256
9c86f4f520d1a90f9395ce38453db3fb0d716f52986af691467004bb52de4fec

SHA512
b2e4e44e39fcb6528c4490a2c976f4faa5a892e1f2b6b806a368fb856a2ef46416eb5a1dc9414113547063c2feed15c40b6060805466ca6a7d9fb71a7a02c388

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

Filesize
19KB

MD5
aab73f099c13687484d94d91b431eb7a

SHA1
20588702447ca2fe4b29b5ad4381e9fd6415cd95

SHA256
9c86f4f520d1a90f9395ce38453db3fb0d716f52986af691467004bb52de4fec

SHA512
b2e4e44e39fcb6528c4490a2c976f4faa5a892e1f2b6b806a368fb856a2ef46416eb5a1dc9414113547063c2feed15c40b6060805466ca6a7d9fb71a7a02c388

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
aab73f099c13687484d94d91b431eb7a

SHA1
20588702447ca2fe4b29b5ad4381e9fd6415cd95

SHA256
9c86f4f520d1a90f9395ce38453db3fb0d716f52986af691467004bb52de4fec

SHA512
b2e4e44e39fcb6528c4490a2c976f4faa5a892e1f2b6b806a368fb856a2ef46416eb5a1dc9414113547063c2feed15c40b6060805466ca6a7d9fb71a7a02c388

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
19KB

MD5
aab73f099c13687484d94d91b431eb7a

SHA1
20588702447ca2fe4b29b5ad4381e9fd6415cd95

SHA256
9c86f4f520d1a90f9395ce38453db3fb0d716f52986af691467004bb52de4fec

SHA512
b2e4e44e39fcb6528c4490a2c976f4faa5a892e1f2b6b806a368fb856a2ef46416eb5a1dc9414113547063c2feed15c40b6060805466ca6a7d9fb71a7a02c388

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
19KB

MD5
aab73f099c13687484d94d91b431eb7a

SHA1
20588702447ca2fe4b29b5ad4381e9fd6415cd95

SHA256
9c86f4f520d1a90f9395ce38453db3fb0d716f52986af691467004bb52de4fec

SHA512
b2e4e44e39fcb6528c4490a2c976f4faa5a892e1f2b6b806a368fb856a2ef46416eb5a1dc9414113547063c2feed15c40b6060805466ca6a7d9fb71a7a02c388

Download Submit
memory/2360-23-0x00000000002B0000-0x00000000002C1000-memory.dmp

Filesize
68KB

Download
memory/2360-11-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2360-52-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2360-92-0x00000000002B0000-0x00000000002C1000-memory.dmp

Filesize
68KB

Download
memory/2580-9-0x0000000000020000-0x0000000000031000-memory.dmp

Filesize
68KB

Download
memory/2580-8-0x0000000000400000-0x0000000000403000-memory.dmp

Filesize
12KB

Download
memory/2580-2-0x0000000000020000-0x0000000000031000-memory.dmp

Filesize
68KB

Download
memory/2832-24-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download