8c124fd5e2e033d590048797a022f68d55d78412a34b42bbe2220da0b4ec23fc

General

Target

NEAS.c65b38c8e578fe8c712b85ba4155c0d0_JC.exe
Size

20KB
MD5

c65b38c8e578fe8c712b85ba4155c0d0
SHA1

c3640c4dbfb66013adcdafe470e07df09db5c0af
SHA256

8c124fd5e2e033d590048797a022f68d55d78412a34b42bbe2220da0b4ec23fc
SHA512

610cbbec3bb3c43836b9390f2e2e090c18f8b0c1acd592123c7a2a63225181ac2d987eb72c3f2d38a9c658a11f57863db30ea39e67cebd881265e8d4b8330a13
SSDEEP

384:jIz4B3bvDV6NAb4b69+g3bDA75vWM5DiNsCrxzUeQAzKF4f7eaAnHcGpUksw:jIUB3d6NG429R3bcv5Dim896PpUk/

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\{4F474956-4746-4143-4F47-495647464143}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4F474956-4746-4143-4F47-495647464143}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4F474956-4746-4143-4F47-495647464143}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{4F474956-4746-4143-4F47-495647464143}\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
3516	rmass.exe
3864	rmass.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x00040000000006e5-2.dat	upx
behavioral2/files/0x00040000000006e5-4.dat	upx
behavioral2/memory/3516-5-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x00040000000006e5-7.dat	upx
behavioral2/memory/3516-39-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/3864-43-0x0000000000400000-0x0000000000411000-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\FirewallDisableNotify = "5120"	rmass.exe
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

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\winrnt.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\idbg32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	NEAS.c65b38c8e578fe8c712b85ba4155c0d0_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 created	C:\Windows\SysWOW64\RECOVER32.DLL	rmass.exe
File created	C:\Windows\SysWOW64\rmass.exe	NEAS.c65b38c8e578fe8c712b85ba4155c0d0_JC.exe
File opened for modification	C:\Windows\SysWOW64\RECOVER32.DLL	rmass.exe
File opened for modification	C:\Windows\SysWOW64\aset32.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\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 8 IoCs

pid	Process
3516	rmass.exe
3516	rmass.exe
3516	rmass.exe
3516	rmass.exe
3516	rmass.exe
3516	rmass.exe
3864	rmass.exe
3864	rmass.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3516	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 496 wrote to memory of 3516	496	NEAS.c65b38c8e578fe8c712b85ba4155c0d0_JC.exe	86
PID 496 wrote to memory of 3516	496	NEAS.c65b38c8e578fe8c712b85ba4155c0d0_JC.exe	86
PID 496 wrote to memory of 3516	496	NEAS.c65b38c8e578fe8c712b85ba4155c0d0_JC.exe	86
PID 3516 wrote to memory of 3864	3516	rmass.exe	87
PID 3516 wrote to memory of 3864	3516	rmass.exe	87
PID 3516 wrote to memory of 3864	3516	rmass.exe	87
PID 3516 wrote to memory of 604	3516	rmass.exe	5
PID 3516 wrote to memory of 3316	3516	rmass.exe	60

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:604

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3316
- C:\Users\Admin\AppData\Local\Temp\NEAS.c65b38c8e578fe8c712b85ba4155c0d0_JC.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.c65b38c8e578fe8c712b85ba4155c0d0_JC.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:496
- - 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
    - 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:3516
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:3864

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

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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
20KB

MD5
7fcdd654e94e6e034c3a920f90b79555

SHA1
6943fcaab55f4cf3b3efb0eb4956e286633408c0

SHA256
c546da738c71ec0635ee55f7d47bf297176f1082a720460d18f27dd68cccd9ab

SHA512
01ba80d9e0d3263c19e9095d81af6bd4e8119f40e1b098fbc963cd2152604f983c28faddf4b3d7690da5071566921ab21180ec6fbe64ac62261b0e5fc85cde52

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

Filesize
21KB

MD5
42ec498d9ea1e7ade64bba83313ddf00

SHA1
76eddc6de4d92bd813262afb7339673ea1ab012d

SHA256
5570b01e470ff9f00b057f6402dfcfa390eba599a2db787b35abf59ffc6d6818

SHA512
02b9cbc8079f18de6d29c8d264c2081eb7e33229a76864edb4920ee949d6cd35430ae9fc59bfff287ca4d9ee2a217051772860455bb4e4bf97116cf3b1da90d2

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

Filesize
18KB

MD5
7344ab26b6120cd31b82b3ea5cde98e2

SHA1
58bc5e4b60f1da47dff2e7da660e99414e65de63

SHA256
4db81478b52dc07f7fc6753f603f4e4fe7062d06e1516deaf4373eafbff879c3

SHA512
21530896aed3986b7ba5ad643ff6fba448e2177bca8d04ca0d97f57431a0e9d25a41c68ddc856a364b4f975445b30648424927ca5d5835ff260f2ba24f48c8ca

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

Filesize
18KB

MD5
7344ab26b6120cd31b82b3ea5cde98e2

SHA1
58bc5e4b60f1da47dff2e7da660e99414e65de63

SHA256
4db81478b52dc07f7fc6753f603f4e4fe7062d06e1516deaf4373eafbff879c3

SHA512
21530896aed3986b7ba5ad643ff6fba448e2177bca8d04ca0d97f57431a0e9d25a41c68ddc856a364b4f975445b30648424927ca5d5835ff260f2ba24f48c8ca

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

Filesize
18KB

MD5
7344ab26b6120cd31b82b3ea5cde98e2

SHA1
58bc5e4b60f1da47dff2e7da660e99414e65de63

SHA256
4db81478b52dc07f7fc6753f603f4e4fe7062d06e1516deaf4373eafbff879c3

SHA512
21530896aed3986b7ba5ad643ff6fba448e2177bca8d04ca0d97f57431a0e9d25a41c68ddc856a364b4f975445b30648424927ca5d5835ff260f2ba24f48c8ca

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/496-3-0x0000000000400000-0x0000000000403000-memory.dmp

Filesize
12KB

Download
memory/3516-5-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3516-39-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3864-43-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads