5c44043df031150b3de25c6666cecece1a6ded2ec3c7e5557811ca00c3c3e445

General

Target

NEAS.62674f8bbe4041c7a65eb7e526cf42d5_JC.exe
Size

18KB
MD5

62674f8bbe4041c7a65eb7e526cf42d5
SHA1

0c736b47864150e45611fd21e72cb3192119780a
SHA256

5c44043df031150b3de25c6666cecece1a6ded2ec3c7e5557811ca00c3c3e445
SHA512

e9651528dac61672c686d9271d47c6900a3a04f69c6a4565080585f95bcfb65163352b8d82c1de6d046a4b2d9bcca0f3552bd6fc39bd74205b0ca4ef25836690
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvXKh+:rRkiLw3HsDSARGG/6o

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\{53585559-504e-4554-5358-5559504E4554}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{53585559-504e-4554-5358-5559504E4554}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{53585559-504e-4554-5358-5559504E4554}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{53585559-504e-4554-5358-5559504E4554}\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
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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe\0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890 = "a"	rmass.exe

Executes dropped EXE 2 IoCs

pid	Process
1436	rmass.exe
228	rmass.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4656-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x000700000002325e-5.dat	upx
behavioral2/files/0x000700000002325e-6.dat	upx
behavioral2/memory/4656-7-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x000700000002325e-12.dat	upx
behavioral2/memory/1436-41-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/228-45-0x0000000000400000-0x0000000000411000-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\rmass.exe	NEAS.62674f8bbe4041c7a65eb7e526cf42d5_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 created	C:\Windows\SysWOW64\ahuy.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\aset32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	NEAS.62674f8bbe4041c7a65eb7e526cf42d5_JC.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\idbg32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.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\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 8 IoCs

pid	Process
1436	rmass.exe
1436	rmass.exe
1436	rmass.exe
1436	rmass.exe
1436	rmass.exe
1436	rmass.exe
228	rmass.exe
228	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4656	NEAS.62674f8bbe4041c7a65eb7e526cf42d5_JC.exe
Token: SeDebugPrivilege	1436	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4656 wrote to memory of 1436	4656	NEAS.62674f8bbe4041c7a65eb7e526cf42d5_JC.exe	85
PID 4656 wrote to memory of 1436	4656	NEAS.62674f8bbe4041c7a65eb7e526cf42d5_JC.exe	85
PID 4656 wrote to memory of 1436	4656	NEAS.62674f8bbe4041c7a65eb7e526cf42d5_JC.exe	85
PID 1436 wrote to memory of 228	1436	rmass.exe	86
PID 1436 wrote to memory of 228	1436	rmass.exe	86
PID 1436 wrote to memory of 228	1436	rmass.exe	86
PID 1436 wrote to memory of 632	1436	rmass.exe	5
PID 1436 wrote to memory of 3192	1436	rmass.exe	55

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:632

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3192
- C:\Users\Admin\AppData\Local\Temp\NEAS.62674f8bbe4041c7a65eb7e526cf42d5_JC.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.62674f8bbe4041c7a65eb7e526cf42d5_JC.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4656
- - 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
    - 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:1436
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:228

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

3

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

3

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Impair Defenses

2

T1562

Disable or Modify Tools

Modify Registry

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
f77a400080f65da7e3ba7ed97ab96556

SHA1
998fd316f91dd5559a240a24199e55e18bc1020a

SHA256
cb15b22b8d23c2d35f482f9849374087832603453781d7f2e57fa9505fc70a26

SHA512
d749c8290d745dff7f3d02d8992b1854b003dabcf08a9d4f34c85965efc37594476623272c7802a31fc66c7f8c3b509e186393eb64236d5dca89e6a8cf4e2fa1

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

Filesize
22KB

MD5
721358c2afff739425e38248e856b8cd

SHA1
41651947d0664d73045f853d3ff9795e994ba3f5

SHA256
3a2e6f73fe85d05190712e9096c418428914aa4dcdda6630852f71c84754d4ce

SHA512
e95da6842431cdbae40eeee80b70d4857f2f6ff6c32edfec6eaa050052b2d8eb141c81227e4d7dc24e896e2e773f771df35540201b5888697127386f97761e8e

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

Filesize
18KB

MD5
62674f8bbe4041c7a65eb7e526cf42d5

SHA1
0c736b47864150e45611fd21e72cb3192119780a

SHA256
5c44043df031150b3de25c6666cecece1a6ded2ec3c7e5557811ca00c3c3e445

SHA512
e9651528dac61672c686d9271d47c6900a3a04f69c6a4565080585f95bcfb65163352b8d82c1de6d046a4b2d9bcca0f3552bd6fc39bd74205b0ca4ef25836690

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

Filesize
18KB

MD5
62674f8bbe4041c7a65eb7e526cf42d5

SHA1
0c736b47864150e45611fd21e72cb3192119780a

SHA256
5c44043df031150b3de25c6666cecece1a6ded2ec3c7e5557811ca00c3c3e445

SHA512
e9651528dac61672c686d9271d47c6900a3a04f69c6a4565080585f95bcfb65163352b8d82c1de6d046a4b2d9bcca0f3552bd6fc39bd74205b0ca4ef25836690

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

Filesize
18KB

MD5
62674f8bbe4041c7a65eb7e526cf42d5

SHA1
0c736b47864150e45611fd21e72cb3192119780a

SHA256
5c44043df031150b3de25c6666cecece1a6ded2ec3c7e5557811ca00c3c3e445

SHA512
e9651528dac61672c686d9271d47c6900a3a04f69c6a4565080585f95bcfb65163352b8d82c1de6d046a4b2d9bcca0f3552bd6fc39bd74205b0ca4ef25836690

Download Submit
C:\Windows\System32\drivers\etc\hosts

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/228-45-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1436-41-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4656-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4656-7-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads