f64f4c98c3ed3b6bddd386825eb449cbec31bb25a84729b768295f88402b7677

General

Target

NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe
Size

21KB
MD5

c57ead958ef99c2b4c140baa6ce333c0
SHA1

6bac44ca490c20f8600950e37bfe85285b4de282
SHA256

f64f4c98c3ed3b6bddd386825eb449cbec31bb25a84729b768295f88402b7677
SHA512

279d05564714e099574671cd9466002a443f6efe32cb21f066845ddd9f0a1fd9e67c7bad9ffa456905d1aec09773dfd429b5adc174d80e7f5f3bbcb3d5f2d35e
SSDEEP

384:jIz4sOPwP1mSKBmjpLxoYiekKrYGsUikOPkxOXayYl6mMyIzpegjX:jIUsddqUj4YilKrz4Pk4pYI9D

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 (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{51494146-4147-584b-5149-41464147584b}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{51494146-4147-584b-5149-41464147584b}\StubPath = "C:\\Windows\\system32\\ahuy.exe"	rmass.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{51494146-4147-584b-5149-41464147584b}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{51494146-4147-584b-5149-41464147584b}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	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
1876	rmass.exe
3204	rmass.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000500000001e9bf-4.dat	upx
behavioral2/files/0x000500000001e9bf-3.dat	upx
behavioral2/memory/1876-5-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x000500000001e9bf-10.dat	upx
behavioral2/memory/1876-75-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/3204-85-0x0000000000400000-0x0000000000411000-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 created	C:\Windows\SysWOW64\rmass.exe	NEAS.c57ead958ef99c2b4c140baa6ce333c0.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\RECOVER32.DLL	rmass.exe
File opened for modification	C:\Windows\SysWOW64\idbg32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe
File created	C:\Windows\SysWOW64\ntdbg.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\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
1876	rmass.exe
1876	rmass.exe
1876	rmass.exe
1876	rmass.exe
1876	rmass.exe
1876	rmass.exe
3204	rmass.exe
3204	rmass.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1876	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1188 wrote to memory of 1876	1188	NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe	86
PID 1188 wrote to memory of 1876	1188	NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe	86
PID 1188 wrote to memory of 1876	1188	NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe	86
PID 1876 wrote to memory of 3204	1876	rmass.exe	87
PID 1876 wrote to memory of 3204	1876	rmass.exe	87
PID 1876 wrote to memory of 3204	1876	rmass.exe	87
PID 1876 wrote to memory of 616	1876	rmass.exe	6
PID 1876 wrote to memory of 3256	1876	rmass.exe	47

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:616

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3256
- C:\Users\Admin\AppData\Local\Temp\NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.c57ead958ef99c2b4c140baa6ce333c0.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:1188
- - 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:1876
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:3204

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
21KB

MD5
fc81335a476d1767d227b20374bcadcd

SHA1
19e61859adebb3c92c9be821b1297a2e0b20a758

SHA256
98fd838df654cc0226b53a41fc2c7f214cf3606b9d8772c2c284b187f1f58b46

SHA512
9acda5138dd1f6a31c949f899a8810516b5c7dfcacfea201067488e230d1dfd915f2e15a434ff27afea32e3d2729aebe4e251654aeda7cde731c09bc1799cb08

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

Filesize
22KB

MD5
c4ac0f8156e906c5ce75c12c47511de4

SHA1
b49b2487ce9778a1822007917937706134789c78

SHA256
8ec6c0eda2784306b7356d4901515d6e23834056fedee83485879c5913125c7d

SHA512
1976be92e9c92c49abc661343b2ad6d73787f53d82079f5a061a1bc51519bfa66fc997cc05d014bc59dc7020d0e58e9a42704e57ce75c5d862136bc3887d64ec

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

Filesize
19KB

MD5
aab73f099c13687484d94d91b431eb7a

SHA1
20588702447ca2fe4b29b5ad4381e9fd6415cd95

SHA256
9c86f4f520d1a90f9395ce38453db3fb0d716f52986af691467004bb52de4fec

SHA512
b2e4e44e39fcb6528c4490a2c976f4faa5a892e1f2b6b806a368fb856a2ef46416eb5a1dc9414113547063c2feed15c40b6060805466ca6a7d9fb71a7a02c388

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

Filesize
19KB

MD5
aab73f099c13687484d94d91b431eb7a

SHA1
20588702447ca2fe4b29b5ad4381e9fd6415cd95

SHA256
9c86f4f520d1a90f9395ce38453db3fb0d716f52986af691467004bb52de4fec

SHA512
b2e4e44e39fcb6528c4490a2c976f4faa5a892e1f2b6b806a368fb856a2ef46416eb5a1dc9414113547063c2feed15c40b6060805466ca6a7d9fb71a7a02c388

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

Filesize
19KB

MD5
aab73f099c13687484d94d91b431eb7a

SHA1
20588702447ca2fe4b29b5ad4381e9fd6415cd95

SHA256
9c86f4f520d1a90f9395ce38453db3fb0d716f52986af691467004bb52de4fec

SHA512
b2e4e44e39fcb6528c4490a2c976f4faa5a892e1f2b6b806a368fb856a2ef46416eb5a1dc9414113547063c2feed15c40b6060805466ca6a7d9fb71a7a02c388

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

Filesize
1KB

MD5
6f47b62de25d1745e296a06b3f98ed19

SHA1
a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f

SHA256
15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4

SHA512
dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7

Download Submit
memory/1188-2-0x0000000000400000-0x0000000000403000-memory.dmp

Filesize
12KB

Download
memory/1876-5-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1876-75-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3204-85-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads