e257a02d6916304b876265da385982c08790b5c046c091583b0f5707b6099d09

Analysis

max time kernel
150s
max time network
157s
platform
windows7_x64
resource
win7-20231023-en
resource tags

arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
submitted
03/11/2023, 05:39

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General

Target

NEAS.1960bcba4448987de7693dddff4d0240_JC.exe
Size

21KB
MD5

1960bcba4448987de7693dddff4d0240
SHA1

748cf5c3166b15f6a0e1b27e27d160c5978538e3
SHA256

e257a02d6916304b876265da385982c08790b5c046c091583b0f5707b6099d09
SHA512

b8b5c17f6498adc9ad6ea6665436176f62b852eb1290a5aac15368ba20247b4e02d7270e2579e75060934a456820b7604d04703aca671b5acc8a9a944e25fc17
SSDEEP

384:jIz4afkAFrSzHKI8OWD6xV6lZteQPergGoINJeZrSbrMW09gtiBm9+KSZWEB:jIUpzzZW+0ZvPPRIKZrwQWiLzK3EB

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\{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
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

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
2592	rmass.exe
2604	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
2956	NEAS.1960bcba4448987de7693dddff4d0240_JC.exe
2956	NEAS.1960bcba4448987de7693dddff4d0240_JC.exe
2592	rmass.exe

UPX packed file 11 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x00060000000120e5-1.dat	upx
behavioral1/files/0x00060000000120e5-11.dat	upx
behavioral1/memory/2592-10-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x00060000000120e5-9.dat	upx
behavioral1/files/0x00060000000120e5-7.dat	upx
behavioral1/files/0x00060000000120e5-4.dat	upx
behavioral1/memory/2956-2-0x0000000000020000-0x0000000000031000-memory.dmp	upx
behavioral1/files/0x00060000000120e5-20.dat	upx
behavioral1/files/0x00060000000120e5-21.dat	upx
behavioral1/memory/2592-44-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2604-55-0x0000000000400000-0x0000000000411000-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 opened for modification	C:\Windows\SysWOW64\rmass.exe	NEAS.1960bcba4448987de7693dddff4d0240_JC.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\rmass.exe	rmass.exe
File created	C:\Windows\SysWOW64\rmass.exe	NEAS.1960bcba4448987de7693dddff4d0240_JC.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\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

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
2592	rmass.exe
2592	rmass.exe
2592	rmass.exe
2604	rmass.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2592	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2956 wrote to memory of 2592	2956	NEAS.1960bcba4448987de7693dddff4d0240_JC.exe	28
PID 2956 wrote to memory of 2592	2956	NEAS.1960bcba4448987de7693dddff4d0240_JC.exe	28
PID 2956 wrote to memory of 2592	2956	NEAS.1960bcba4448987de7693dddff4d0240_JC.exe	28
PID 2956 wrote to memory of 2592	2956	NEAS.1960bcba4448987de7693dddff4d0240_JC.exe	28
PID 2592 wrote to memory of 420	2592	rmass.exe	3
PID 2592 wrote to memory of 1356	2592	rmass.exe	19
PID 2592 wrote to memory of 2604	2592	rmass.exe	29
PID 2592 wrote to memory of 2604	2592	rmass.exe	29
PID 2592 wrote to memory of 2604	2592	rmass.exe	29
PID 2592 wrote to memory of 2604	2592	rmass.exe	29

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

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1356
- C:\Users\Admin\AppData\Local\Temp\NEAS.1960bcba4448987de7693dddff4d0240_JC.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.1960bcba4448987de7693dddff4d0240_JC.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:2956
- - 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:2592
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2604

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
4d53642d407eabe9da2f2db0bd4ea3cb

SHA1
151d0cfb64425f295d1a104a8ebd6cc73d8ad6d4

SHA256
d7f3bce47f8888ef7e99e6dc34fc5aa851853949a010a016085c3ea402436f9d

SHA512
e73ea9a758bd6e3753de5200ddc431ad7cbe80ff2c29b0cf8c1f888b83077f5f43a03dfd4d2ffa12304d7210e6d696e46dde1541b2ec158407a5a20323b04dd3

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

Filesize
22KB

MD5
f9f365f86858ff1f6dbdfd6f66d8ffbe

SHA1
acc7a78fd2ee86be6f5d0b4a5bc7a1e8ae9b8fbc

SHA256
8851ee809f9f0e3c48fb531a09199314a745dddb21d80e9969c7193ac17f489c

SHA512
b0877d9729c2a2b007bdaa71675d43d16e0d7d635de43d559e8616989f194da23c2a0a184cb67cb9df4342db872b653453213e3ea853fb3f4762f4e2fa0e6868

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

Filesize
19KB

MD5
954aab63f8286bf3f3d12247f5b942a1

SHA1
651765f8e401300b473943179629c6e7f1df4ae9

SHA256
cfb9423af027f7ee9b7109ee2756d6a75efdfc374538f70f06ed8dae13d36e7e

SHA512
b9619631bda2213c2c415cb9bade3a56c44708e81a5282d51a5538117a07d2c6f27c6e16840b3e68cdba65534a44664288453d41425bc22236e4e0618019e33c

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

Filesize
19KB

MD5
954aab63f8286bf3f3d12247f5b942a1

SHA1
651765f8e401300b473943179629c6e7f1df4ae9

SHA256
cfb9423af027f7ee9b7109ee2756d6a75efdfc374538f70f06ed8dae13d36e7e

SHA512
b9619631bda2213c2c415cb9bade3a56c44708e81a5282d51a5538117a07d2c6f27c6e16840b3e68cdba65534a44664288453d41425bc22236e4e0618019e33c

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

Filesize
19KB

MD5
954aab63f8286bf3f3d12247f5b942a1

SHA1
651765f8e401300b473943179629c6e7f1df4ae9

SHA256
cfb9423af027f7ee9b7109ee2756d6a75efdfc374538f70f06ed8dae13d36e7e

SHA512
b9619631bda2213c2c415cb9bade3a56c44708e81a5282d51a5538117a07d2c6f27c6e16840b3e68cdba65534a44664288453d41425bc22236e4e0618019e33c

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

Filesize
19KB

MD5
954aab63f8286bf3f3d12247f5b942a1

SHA1
651765f8e401300b473943179629c6e7f1df4ae9

SHA256
cfb9423af027f7ee9b7109ee2756d6a75efdfc374538f70f06ed8dae13d36e7e

SHA512
b9619631bda2213c2c415cb9bade3a56c44708e81a5282d51a5538117a07d2c6f27c6e16840b3e68cdba65534a44664288453d41425bc22236e4e0618019e33c

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
954aab63f8286bf3f3d12247f5b942a1

SHA1
651765f8e401300b473943179629c6e7f1df4ae9

SHA256
cfb9423af027f7ee9b7109ee2756d6a75efdfc374538f70f06ed8dae13d36e7e

SHA512
b9619631bda2213c2c415cb9bade3a56c44708e81a5282d51a5538117a07d2c6f27c6e16840b3e68cdba65534a44664288453d41425bc22236e4e0618019e33c

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
19KB

MD5
954aab63f8286bf3f3d12247f5b942a1

SHA1
651765f8e401300b473943179629c6e7f1df4ae9

SHA256
cfb9423af027f7ee9b7109ee2756d6a75efdfc374538f70f06ed8dae13d36e7e

SHA512
b9619631bda2213c2c415cb9bade3a56c44708e81a5282d51a5538117a07d2c6f27c6e16840b3e68cdba65534a44664288453d41425bc22236e4e0618019e33c

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
19KB

MD5
954aab63f8286bf3f3d12247f5b942a1

SHA1
651765f8e401300b473943179629c6e7f1df4ae9

SHA256
cfb9423af027f7ee9b7109ee2756d6a75efdfc374538f70f06ed8dae13d36e7e

SHA512
b9619631bda2213c2c415cb9bade3a56c44708e81a5282d51a5538117a07d2c6f27c6e16840b3e68cdba65534a44664288453d41425bc22236e4e0618019e33c

Download Submit
memory/2592-44-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2592-10-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2604-55-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2956-2-0x0000000000020000-0x0000000000031000-memory.dmp

Filesize
68KB

Download
memory/2956-8-0x0000000000400000-0x0000000000403000-memory.dmp

Filesize
12KB

Download
memory/2956-43-0x0000000000020000-0x0000000000031000-memory.dmp

Filesize
68KB

Download