f0650f2ea4b668eeadff0a96fb3405db7f8dc86d789e3d0b03b712d57210499b

Analysis

max time kernel
150s
max time network
126s
platform
windows7_x64
resource
win7-20230831-en
resource tags

arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
submitted
30-09-2023 11:25

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

1df07d8debfe11b41ac10a1b634658f3_JC.exe
Size

18KB
MD5

1df07d8debfe11b41ac10a1b634658f3
SHA1

035adbbd92c68db4ba704f6b97b32f38e500b6a2
SHA256

f0650f2ea4b668eeadff0a96fb3405db7f8dc86d789e3d0b03b712d57210499b
SHA512

d7538e4e574c564c053e7a954d49ee55dfbe9ef482e73f0afde142c40fa482a5a8979127c03a7f6bc9c00bd3f8d3cf1c9cb6274de7a16877ef112c0c0ea0efcb
SSDEEP

384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvXk2t:rRkiLw3HsDSARGG/r

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\{5A574B51-4849-5742-5A57-4B5148495742}	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{5A574B51-4849-5742-5A57-4B5148495742}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{5A574B51-4849-5742-5A57-4B5148495742}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{5A574B51-4849-5742-5A57-4B5148495742}\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
2676	rmass.exe
2692	rmass.exe

Loads dropped DLL 3 IoCs

pid	Process
1572	1df07d8debfe11b41ac10a1b634658f3_JC.exe
1572	1df07d8debfe11b41ac10a1b634658f3_JC.exe
2676	rmass.exe

UPX packed file 12 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1572-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x00060000000120e4-4.dat	upx
behavioral1/memory/1572-10-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x00060000000120e4-7.dat	upx
behavioral1/files/0x00060000000120e4-6.dat	upx
behavioral1/files/0x00060000000120e4-24.dat	upx
behavioral1/files/0x00060000000120e4-13.dat	upx
behavioral1/files/0x00060000000120e4-12.dat	upx
behavioral1/memory/2676-23-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/files/0x00060000000120e4-22.dat	upx
behavioral1/memory/2692-25-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral1/memory/2676-50-0x0000000000400000-0x0000000000411000-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 opened for modification	C:\Windows\SysWOW64\rmass.exe	1df07d8debfe11b41ac10a1b634658f3_JC.exe
File created	C:\Windows\SysWOW64\rmass.exe	1df07d8debfe11b41ac10a1b634658f3_JC.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	rmass.exe
File opened for modification	C:\Windows\SysWOW64\ntdbg.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\RECOVER32.DLL	rmass.exe
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\aset32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\idbg32.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
2676	rmass.exe
2676	rmass.exe
2676	rmass.exe
2692	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1572	1df07d8debfe11b41ac10a1b634658f3_JC.exe
Token: SeDebugPrivilege	2676	rmass.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1572 wrote to memory of 2676	1572	1df07d8debfe11b41ac10a1b634658f3_JC.exe	28
PID 1572 wrote to memory of 2676	1572	1df07d8debfe11b41ac10a1b634658f3_JC.exe	28
PID 1572 wrote to memory of 2676	1572	1df07d8debfe11b41ac10a1b634658f3_JC.exe	28
PID 1572 wrote to memory of 2676	1572	1df07d8debfe11b41ac10a1b634658f3_JC.exe	28
PID 2676 wrote to memory of 424	2676	rmass.exe	3
PID 2676 wrote to memory of 1216	2676	rmass.exe	12
PID 2676 wrote to memory of 2692	2676	rmass.exe	29
PID 2676 wrote to memory of 2692	2676	rmass.exe	29
PID 2676 wrote to memory of 2692	2676	rmass.exe	29
PID 2676 wrote to memory of 2692	2676	rmass.exe	29

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:424

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1216
- C:\Users\Admin\AppData\Local\Temp\1df07d8debfe11b41ac10a1b634658f3_JC.exe
  "C:\Users\Admin\AppData\Local\Temp\1df07d8debfe11b41ac10a1b634658f3_JC.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1572
- - 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:2676
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:2692

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

Loading Replay Monitor...

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
e17f450577c0f2488aa2e3269d73fd33

SHA1
e49749b375f902cde611eddaa23a0ae3af7172d4

SHA256
e72abe2856fe9bc0653dd5af878a401e04ce98dd4c2b01eb819a494e3de0d861

SHA512
2d3bc07681b26c53acd242179b7e585e850474b763077b6bd52f98c7156ed33c97c56fe1dd942501dda168d5f9a72afa654b71906523410b97bf18194d6a232a

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

Filesize
21KB

MD5
f7a032710e7b3707e5d1c2e20887de5a

SHA1
d7df3baf6de758c02f5bf641b7b0b43432adbe13

SHA256
609edacc1a61bf4080bad7b93c10fdc6ae6a65ac7bae4a482c657654b02cd697

SHA512
3a8c934e2398651f2f62dc822d0a0e7b4d16f670ed53c05d4b3cf2bbd3dbcae822c4a877327a873b05e78ee09452fb59342ef86713d1b78cf04694c8dae38122

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

Filesize
18KB

MD5
1df07d8debfe11b41ac10a1b634658f3

SHA1
035adbbd92c68db4ba704f6b97b32f38e500b6a2

SHA256
f0650f2ea4b668eeadff0a96fb3405db7f8dc86d789e3d0b03b712d57210499b

SHA512
d7538e4e574c564c053e7a954d49ee55dfbe9ef482e73f0afde142c40fa482a5a8979127c03a7f6bc9c00bd3f8d3cf1c9cb6274de7a16877ef112c0c0ea0efcb

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

Filesize
18KB

MD5
1df07d8debfe11b41ac10a1b634658f3

SHA1
035adbbd92c68db4ba704f6b97b32f38e500b6a2

SHA256
f0650f2ea4b668eeadff0a96fb3405db7f8dc86d789e3d0b03b712d57210499b

SHA512
d7538e4e574c564c053e7a954d49ee55dfbe9ef482e73f0afde142c40fa482a5a8979127c03a7f6bc9c00bd3f8d3cf1c9cb6274de7a16877ef112c0c0ea0efcb

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

Filesize
18KB

MD5
1df07d8debfe11b41ac10a1b634658f3

SHA1
035adbbd92c68db4ba704f6b97b32f38e500b6a2

SHA256
f0650f2ea4b668eeadff0a96fb3405db7f8dc86d789e3d0b03b712d57210499b

SHA512
d7538e4e574c564c053e7a954d49ee55dfbe9ef482e73f0afde142c40fa482a5a8979127c03a7f6bc9c00bd3f8d3cf1c9cb6274de7a16877ef112c0c0ea0efcb

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

Filesize
18KB

MD5
1df07d8debfe11b41ac10a1b634658f3

SHA1
035adbbd92c68db4ba704f6b97b32f38e500b6a2

SHA256
f0650f2ea4b668eeadff0a96fb3405db7f8dc86d789e3d0b03b712d57210499b

SHA512
d7538e4e574c564c053e7a954d49ee55dfbe9ef482e73f0afde142c40fa482a5a8979127c03a7f6bc9c00bd3f8d3cf1c9cb6274de7a16877ef112c0c0ea0efcb

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
18KB

MD5
1df07d8debfe11b41ac10a1b634658f3

SHA1
035adbbd92c68db4ba704f6b97b32f38e500b6a2

SHA256
f0650f2ea4b668eeadff0a96fb3405db7f8dc86d789e3d0b03b712d57210499b

SHA512
d7538e4e574c564c053e7a954d49ee55dfbe9ef482e73f0afde142c40fa482a5a8979127c03a7f6bc9c00bd3f8d3cf1c9cb6274de7a16877ef112c0c0ea0efcb

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
18KB

MD5
1df07d8debfe11b41ac10a1b634658f3

SHA1
035adbbd92c68db4ba704f6b97b32f38e500b6a2

SHA256
f0650f2ea4b668eeadff0a96fb3405db7f8dc86d789e3d0b03b712d57210499b

SHA512
d7538e4e574c564c053e7a954d49ee55dfbe9ef482e73f0afde142c40fa482a5a8979127c03a7f6bc9c00bd3f8d3cf1c9cb6274de7a16877ef112c0c0ea0efcb

Download Submit
\Windows\SysWOW64\rmass.exe

Filesize
18KB

MD5
1df07d8debfe11b41ac10a1b634658f3

SHA1
035adbbd92c68db4ba704f6b97b32f38e500b6a2

SHA256
f0650f2ea4b668eeadff0a96fb3405db7f8dc86d789e3d0b03b712d57210499b

SHA512
d7538e4e574c564c053e7a954d49ee55dfbe9ef482e73f0afde142c40fa482a5a8979127c03a7f6bc9c00bd3f8d3cf1c9cb6274de7a16877ef112c0c0ea0efcb

Download Submit
memory/1572-11-0x0000000000320000-0x0000000000331000-memory.dmp

Filesize
68KB

Download
memory/1572-0-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1572-10-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2676-23-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2676-50-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/2692-25-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download