9645428a1176b8106c7017267a2120ad2d72dd656537513e743bbb3e08b36a5b

Analysis

max time kernel
150s
max time network
122s
platform
windows7_x64
resource
win7-20231025-en
resource tags

arch:x64arch:x86image:win7-20231025-enlocale:en-usos:windows7-x64system
submitted
05/11/2023, 15:21

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General

Target

NEAS.9f2d47d68fa0aadd8fb549421293efc2_JC.exe
Size

19KB
MD5

9f2d47d68fa0aadd8fb549421293efc2
SHA1

a4546ac0592bc5cbf866795971bc26a934281feb
SHA256

9645428a1176b8106c7017267a2120ad2d72dd656537513e743bbb3e08b36a5b
SHA512

f36090a977e860224770d98a93b94fb0bc51dd69664698416b17d14fd7b0d6ea7b83c64cc1cb86c3d0a558a297adc841b4605e3075aacc84f4bbcdef800411b5
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvX+C:rRkiLw3HsDSARGG/OC

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\{50545A53-464b-4946-5054-5A53464B4946}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{50545A53-464b-4946-5054-5A53464B4946}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{50545A53-464b-4946-5054-5A53464B4946}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{50545A53-464b-4946-5054-5A53464B4946}\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
2968	rmass.exe
2660	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
1056	NEAS.9f2d47d68fa0aadd8fb549421293efc2_JC.exe
1056	NEAS.9f2d47d68fa0aadd8fb549421293efc2_JC.exe
2968	rmass.exe

UPX packed file 12 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1056-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x0009000000012023-4.dat	upx
behavioral1/files/0x0009000000012023-6.dat	upx
behavioral1/files/0x0009000000012023-13.dat	upx
behavioral1/memory/2968-18-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2660-26-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/1056-11-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x0009000000012023-12.dat	upx
behavioral1/files/0x0009000000012023-7.dat	upx
behavioral1/files/0x0009000000012023-24.dat	upx
behavioral1/files/0x0009000000012023-19.dat	upx
behavioral1/memory/2968-54-0x0000000000400000-0x0000000000411000-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 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\RECOVER32.DLL	rmass.exe
File opened for modification	C:\Windows\SysWOW64\idbg32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	NEAS.9f2d47d68fa0aadd8fb549421293efc2_JC.exe
File created	C:\Windows\SysWOW64\rmass.exe	NEAS.9f2d47d68fa0aadd8fb549421293efc2_JC.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

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 4 IoCs

pid	Process
2968	rmass.exe
2968	rmass.exe
2968	rmass.exe
2660	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1056	NEAS.9f2d47d68fa0aadd8fb549421293efc2_JC.exe
Token: SeDebugPrivilege	2968	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1056 wrote to memory of 2968	1056	NEAS.9f2d47d68fa0aadd8fb549421293efc2_JC.exe	28
PID 1056 wrote to memory of 2968	1056	NEAS.9f2d47d68fa0aadd8fb549421293efc2_JC.exe	28
PID 1056 wrote to memory of 2968	1056	NEAS.9f2d47d68fa0aadd8fb549421293efc2_JC.exe	28
PID 1056 wrote to memory of 2968	1056	NEAS.9f2d47d68fa0aadd8fb549421293efc2_JC.exe	28
PID 2968 wrote to memory of 420	2968	rmass.exe	5
PID 2968 wrote to memory of 1348	2968	rmass.exe	13
PID 2968 wrote to memory of 2660	2968	rmass.exe	29
PID 2968 wrote to memory of 2660	2968	rmass.exe	29
PID 2968 wrote to memory of 2660	2968	rmass.exe	29
PID 2968 wrote to memory of 2660	2968	rmass.exe	29

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:420

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1348
- C:\Users\Admin\AppData\Local\Temp\NEAS.9f2d47d68fa0aadd8fb549421293efc2_JC.exe
  "C:\Users\Admin\AppData\Local\Temp\NEAS.9f2d47d68fa0aadd8fb549421293efc2_JC.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1056
- - 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
    - Loads dropped DLL
    - 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:2968
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2660

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

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
ec0f23edc1fa6581b745e6d5becf35c9

SHA1
ea9a4da3e592f695ba553c964c94149690e56023

SHA256
cee80f6bf062ec050f80f81057804fbdbbcfcae26b5e84a9925f975a78f8c1ed

SHA512
0f2ae5e78be3272db2b65fa2a980398b6302c7d3f6c121a74af4152a4733b5cf1f70821864a416ac78a9b72cc78dc9e8ed9298dd09bcaa673890c0459ec18282

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

Filesize
22KB

MD5
21d38c7c03402a31b78bbce7e0caf8cc

SHA1
4b52c2a7a317aeea33ae9efc2b8aabdbe23e230b

SHA256
247b8ca3c64179e362009c01857be82971ff7ef916d9365c6f50002e112fe7fe

SHA512
590004ecf851be6140d31abadca4b7db5f4d39e995acb388ebf44aca45e9860e464be19d3ca4591102c7c94f0ab5fa39a367af864ba6954f62a48bf8a95a968a

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

Filesize
19KB

MD5
9f2d47d68fa0aadd8fb549421293efc2

SHA1
a4546ac0592bc5cbf866795971bc26a934281feb

SHA256
9645428a1176b8106c7017267a2120ad2d72dd656537513e743bbb3e08b36a5b

SHA512
f36090a977e860224770d98a93b94fb0bc51dd69664698416b17d14fd7b0d6ea7b83c64cc1cb86c3d0a558a297adc841b4605e3075aacc84f4bbcdef800411b5

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

Filesize
19KB

MD5
9f2d47d68fa0aadd8fb549421293efc2

SHA1
a4546ac0592bc5cbf866795971bc26a934281feb

SHA256
9645428a1176b8106c7017267a2120ad2d72dd656537513e743bbb3e08b36a5b

SHA512
f36090a977e860224770d98a93b94fb0bc51dd69664698416b17d14fd7b0d6ea7b83c64cc1cb86c3d0a558a297adc841b4605e3075aacc84f4bbcdef800411b5

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

Filesize
19KB

MD5
9f2d47d68fa0aadd8fb549421293efc2

SHA1
a4546ac0592bc5cbf866795971bc26a934281feb

SHA256
9645428a1176b8106c7017267a2120ad2d72dd656537513e743bbb3e08b36a5b

SHA512
f36090a977e860224770d98a93b94fb0bc51dd69664698416b17d14fd7b0d6ea7b83c64cc1cb86c3d0a558a297adc841b4605e3075aacc84f4bbcdef800411b5

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

Filesize
19KB

MD5
9f2d47d68fa0aadd8fb549421293efc2

SHA1
a4546ac0592bc5cbf866795971bc26a934281feb

SHA256
9645428a1176b8106c7017267a2120ad2d72dd656537513e743bbb3e08b36a5b

SHA512
f36090a977e860224770d98a93b94fb0bc51dd69664698416b17d14fd7b0d6ea7b83c64cc1cb86c3d0a558a297adc841b4605e3075aacc84f4bbcdef800411b5

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

Filesize
1KB

MD5
b10b13206b0f2cf3968050072f6979bf

SHA1
699db21ba9cecf3f13ac3d76e22cfa41aa94da80

SHA256
0eef3217095cb97b695c434e74d6314bf9e869a013d6e9c88e58c34576a276b4

SHA512
d33bfd931be6676539507a69101d99fa4c5ef36b12422bd11f063b9b6a47b7444f6c4ad5f35e044714fdb872e96cd9fddf049e8329af1219483887f6ac5f4a5d

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
19KB

MD5
9f2d47d68fa0aadd8fb549421293efc2

SHA1
a4546ac0592bc5cbf866795971bc26a934281feb

SHA256
9645428a1176b8106c7017267a2120ad2d72dd656537513e743bbb3e08b36a5b

SHA512
f36090a977e860224770d98a93b94fb0bc51dd69664698416b17d14fd7b0d6ea7b83c64cc1cb86c3d0a558a297adc841b4605e3075aacc84f4bbcdef800411b5

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
19KB

MD5
9f2d47d68fa0aadd8fb549421293efc2

SHA1
a4546ac0592bc5cbf866795971bc26a934281feb

SHA256
9645428a1176b8106c7017267a2120ad2d72dd656537513e743bbb3e08b36a5b

SHA512
f36090a977e860224770d98a93b94fb0bc51dd69664698416b17d14fd7b0d6ea7b83c64cc1cb86c3d0a558a297adc841b4605e3075aacc84f4bbcdef800411b5

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
19KB

MD5
9f2d47d68fa0aadd8fb549421293efc2

SHA1
a4546ac0592bc5cbf866795971bc26a934281feb

SHA256
9645428a1176b8106c7017267a2120ad2d72dd656537513e743bbb3e08b36a5b

SHA512
f36090a977e860224770d98a93b94fb0bc51dd69664698416b17d14fd7b0d6ea7b83c64cc1cb86c3d0a558a297adc841b4605e3075aacc84f4bbcdef800411b5

Download Submit
memory/1056-10-0x0000000000320000-0x0000000000331000-memory.dmp

Filesize
68KB

Download
memory/1056-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1056-11-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2660-26-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2968-18-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2968-54-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2968-60-0x00000000002B0000-0x00000000002C1000-memory.dmp

Filesize
68KB

Download
memory/2968-25-0x00000000002B0000-0x00000000002C1000-memory.dmp

Filesize
68KB

Download