72d3c458fadf30e91a33910332d67af987a22dd0034e3c589ca1bc5b27538dbf

General

Target

NEAS.NEAS681981b9430d432335c42c668f1fbe0fexe_JC.exe
Size

19KB
MD5

681981b9430d432335c42c668f1fbe0f
SHA1

13c8aa181730bdd5575b187177e96d81fe6bd338
SHA256

72d3c458fadf30e91a33910332d67af987a22dd0034e3c589ca1bc5b27538dbf
SHA512

b261c7256367a9255829d4869d79f446743e743220c91d3634cb03dce381ebbc99a03bf5a7a45ad8747d02940a4a8c62de3d00a3de70d692e593ad0a32671dc8
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvXfILG:rRkiLw3HsDSARGG/gi

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
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
860	rmass.exe
4744	rmass.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/732-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x0007000000023219-5.dat	upx
behavioral2/files/0x0007000000023219-6.dat	upx
behavioral2/memory/732-7-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x0007000000023219-12.dat	upx
behavioral2/memory/860-41-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/4744-45-0x0000000000400000-0x0000000000411000-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}\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
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

Drops file in System32 directory 12 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File created	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\idbg32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	NEAS.NEAS681981b9430d432335c42c668f1fbe0fexe_JC.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\ahuy.exe	rmass.exe
File opened for modification	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	rmass.exe
File created	C:\Windows\SysWOW64\rmass.exe	NEAS.NEAS681981b9430d432335c42c668f1fbe0fexe_JC.exe

Drops file in Program Files directory 3 IoCs

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

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
860	rmass.exe
860	rmass.exe
860	rmass.exe
860	rmass.exe
860	rmass.exe
860	rmass.exe
4744	rmass.exe
4744	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	732	NEAS.NEAS681981b9430d432335c42c668f1fbe0fexe_JC.exe
Token: SeDebugPrivilege	860	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 732 wrote to memory of 860	732	NEAS.NEAS681981b9430d432335c42c668f1fbe0fexe_JC.exe	83
PID 732 wrote to memory of 860	732	NEAS.NEAS681981b9430d432335c42c668f1fbe0fexe_JC.exe	83
PID 732 wrote to memory of 860	732	NEAS.NEAS681981b9430d432335c42c668f1fbe0fexe_JC.exe	83
PID 860 wrote to memory of 608	860	rmass.exe	3
PID 860 wrote to memory of 4744	860	rmass.exe	84
PID 860 wrote to memory of 4744	860	rmass.exe	84
PID 860 wrote to memory of 4744	860	rmass.exe	84
PID 860 wrote to memory of 3128	860	rmass.exe	54

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:608

C:\Users\Admin\AppData\Local\Temp\NEAS.NEAS681981b9430d432335c42c668f1fbe0fexe_JC.exe
"C:\Users\Admin\AppData\Local\Temp\NEAS.NEAS681981b9430d432335c42c668f1fbe0fexe_JC.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:732
- C:\Windows\SysWOW64\rmass.exe
  "C:\Windows\system32\rmass.exe"
  2⤵
  - 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:860
- - C:\Windows\SysWOW64\rmass.exe
    --k33p
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    PID:4744

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3128

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
26abbaf02afec8d062f0f78bfd006ae1

SHA1
d23aabccf0dc933869182657104ec90612accbda

SHA256
ab06a5d457ef4a56fe2b4842c42d207e0fbbb495306da99a4ef5c79a4180594f

SHA512
53263c14c5638f1d25866a551f04201879d5531b046eb44e4df7cdad09d205417b3acecf103f64759a4823f352fddee332f59889819654c1a722100eca7d6ffb

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

Filesize
22KB

MD5
bcfddf06953c6e243666318e77a735bc

SHA1
9fdb1eb3efb365fde8a5235d0a32c4a0e8643211

SHA256
e0c0ad4d0a0b8787b3bd1115fe7d50c47d60222465ecbc7e101e7981c7041b42

SHA512
1643cd1765624a82eab13d69b6e8ad914b74b9492c4aaa82e874e666bd6929b04e52911cc1b76a828969883210e95880019c0343befcebdda39fda90172532e8

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

Filesize
19KB

MD5
681981b9430d432335c42c668f1fbe0f

SHA1
13c8aa181730bdd5575b187177e96d81fe6bd338

SHA256
72d3c458fadf30e91a33910332d67af987a22dd0034e3c589ca1bc5b27538dbf

SHA512
b261c7256367a9255829d4869d79f446743e743220c91d3634cb03dce381ebbc99a03bf5a7a45ad8747d02940a4a8c62de3d00a3de70d692e593ad0a32671dc8

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

Filesize
19KB

MD5
681981b9430d432335c42c668f1fbe0f

SHA1
13c8aa181730bdd5575b187177e96d81fe6bd338

SHA256
72d3c458fadf30e91a33910332d67af987a22dd0034e3c589ca1bc5b27538dbf

SHA512
b261c7256367a9255829d4869d79f446743e743220c91d3634cb03dce381ebbc99a03bf5a7a45ad8747d02940a4a8c62de3d00a3de70d692e593ad0a32671dc8

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

Filesize
19KB

MD5
681981b9430d432335c42c668f1fbe0f

SHA1
13c8aa181730bdd5575b187177e96d81fe6bd338

SHA256
72d3c458fadf30e91a33910332d67af987a22dd0034e3c589ca1bc5b27538dbf

SHA512
b261c7256367a9255829d4869d79f446743e743220c91d3634cb03dce381ebbc99a03bf5a7a45ad8747d02940a4a8c62de3d00a3de70d692e593ad0a32671dc8

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/732-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/732-7-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/860-41-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4744-45-0x0000000000400000-0x0000000000411000-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