89695d51a13cc80db8e4c6bda06ca1f1bdd88b66efa71cfb205e56fde060ea30

General

Target

NEAS.82711947ab8024a670455e7aeb961791_JC.exe
Size

19KB
MD5

82711947ab8024a670455e7aeb961791
SHA1

c1a16d279326a8192d40b50a6348df67d27b82d5
SHA256

89695d51a13cc80db8e4c6bda06ca1f1bdd88b66efa71cfb205e56fde060ea30
SHA512

e4700ef1037679e6edab801f6633833a35a740643a35cb659ed0bab2c8dbbd65d6e15a65886995dbb5a9c0ee5c208d5ef1b23db2a54e514f9e348fad030e8872
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvXwW:rRkiLw3HsDSARGG/d

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\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
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{534D494A-574a-4d48-534D-494A574A4d48}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{534D494A-574a-4d48-534D-494A574A4d48}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{534D494A-574a-4d48-534D-494A574A4d48}\StubPath = "C:\\Windows\\system32\\ahuy.exe"	rmass.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{534D494A-574a-4d48-534D-494A574A4d48}	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
1656	rmass.exe
1100	rmass.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1332-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x000700000002320e-5.dat	upx
behavioral2/memory/1332-6-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x000700000002320e-7.dat	upx
behavioral2/memory/1656-8-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x000700000002320e-13.dat	upx
behavioral2/memory/1656-24-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/1100-28-0x0000000000400000-0x0000000000411000-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
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\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 created	C:\Windows\SysWOW64\rmass.exe	NEAS.82711947ab8024a670455e7aeb961791_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\rmass.exe	NEAS.82711947ab8024a670455e7aeb961791_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
1656	rmass.exe
1656	rmass.exe
1656	rmass.exe
1656	rmass.exe
1656	rmass.exe
1656	rmass.exe
1100	rmass.exe
1100	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1332	NEAS.82711947ab8024a670455e7aeb961791_JC.exe
Token: SeDebugPrivilege	1656	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1332 wrote to memory of 1656	1332	NEAS.82711947ab8024a670455e7aeb961791_JC.exe	85
PID 1332 wrote to memory of 1656	1332	NEAS.82711947ab8024a670455e7aeb961791_JC.exe	85
PID 1332 wrote to memory of 1656	1332	NEAS.82711947ab8024a670455e7aeb961791_JC.exe	85
PID 1656 wrote to memory of 608	1656	rmass.exe	3
PID 1656 wrote to memory of 1100	1656	rmass.exe	86
PID 1656 wrote to memory of 1100	1656	rmass.exe	86
PID 1656 wrote to memory of 1100	1656	rmass.exe	86
PID 1656 wrote to memory of 3084	1656	rmass.exe	52

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

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3084
- C:\Users\Admin\AppData\Local\Temp\NEAS.82711947ab8024a670455e7aeb961791_JC.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.82711947ab8024a670455e7aeb961791_JC.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1332
- - 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:1656
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:1100

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
0bc87a4efad144cd7a62ae0e14fe37f7

SHA1
d791dd8053786305fb0465b459b00ed82f94232f

SHA256
47c07d9487896cba933ed67a9967bb07356c1c176c75ca135aa567db0ec6f109

SHA512
cc0899f3d26767c90b0aeb62a818b89612afd19b2c31f84fb535ea0aed14bfa7116d16e4c7e07c2b428345e9ea1c6eb7b57dec5b3e0ba4eb986f82d05bee4a52

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

Filesize
22KB

MD5
940f845f3b7d9b1500605e44b1295968

SHA1
197ccaa2f50c1bc8fffb62bb1320773637a71103

SHA256
530f418c134a3b3d5cd02951c87b66d5ed2875fed2086a2832f5efa2240371f1

SHA512
d4160c7da8784e1481bb7a5a2a14e9c31eaf080cd68ce3cfb9be7ae3da540d4ddbffaf2c01ef5a2620662588a3d36b2fa74006bee7b5e73c1d065b51aa1a5a11

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

Filesize
19KB

MD5
82711947ab8024a670455e7aeb961791

SHA1
c1a16d279326a8192d40b50a6348df67d27b82d5

SHA256
89695d51a13cc80db8e4c6bda06ca1f1bdd88b66efa71cfb205e56fde060ea30

SHA512
e4700ef1037679e6edab801f6633833a35a740643a35cb659ed0bab2c8dbbd65d6e15a65886995dbb5a9c0ee5c208d5ef1b23db2a54e514f9e348fad030e8872

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

Filesize
19KB

MD5
82711947ab8024a670455e7aeb961791

SHA1
c1a16d279326a8192d40b50a6348df67d27b82d5

SHA256
89695d51a13cc80db8e4c6bda06ca1f1bdd88b66efa71cfb205e56fde060ea30

SHA512
e4700ef1037679e6edab801f6633833a35a740643a35cb659ed0bab2c8dbbd65d6e15a65886995dbb5a9c0ee5c208d5ef1b23db2a54e514f9e348fad030e8872

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

Filesize
19KB

MD5
82711947ab8024a670455e7aeb961791

SHA1
c1a16d279326a8192d40b50a6348df67d27b82d5

SHA256
89695d51a13cc80db8e4c6bda06ca1f1bdd88b66efa71cfb205e56fde060ea30

SHA512
e4700ef1037679e6edab801f6633833a35a740643a35cb659ed0bab2c8dbbd65d6e15a65886995dbb5a9c0ee5c208d5ef1b23db2a54e514f9e348fad030e8872

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/1100-28-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1332-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1332-6-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1656-8-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1656-24-0x0000000000400000-0x0000000000411000-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