e2e7ded53edeb4d9b01c6c8073f1820df39ae8ed1e29204a64f67f739c0f6f5f

Analysis

max time kernel
149s
max time network
128s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
26/05/2024, 04:03

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
e2e7ded53edeb4d9b01c6c8073f1820df39ae8ed1e29204a64f67f739c0f6f5f.exe
Size 22KB
Sample240526-emsdvafa47
SHA256 e2e7ded53edeb4d9b01c6c8073f1820df39ae8ed1e29204a64f67f739c0f6f5f
MD5 2be528b4d2ddb4d37d4e916a334d030a
SHA1 51510972d8d3a80b0c9f0fbed8b28cb9bbf17791
SHA512 f8a8c40aab9c87c5842806c6025a97718f6479d130cdb55936aed384b22acb0031b5e1c2485bdc90dc5368ab0861623bc5f23009ce99c7c4c3bcac87df440d91
SSDEEP 384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvX8Mb7a6c8j:rRkiLw3HsDSARGG/MMb7rcE
MD5 SHA1 SHA512 SSDEEP

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\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

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\{47594C51-574a-434e-4759-4C51574A434e}\01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123 = "a"	rmass.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{47594C51-574a-434e-4759-4C51574A434e}\IsInstalled = "1"	rmass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{47594C51-574a-434e-4759-4C51574A434e}\StubPath = "C:\\Windows\\system32\\ahuy.exe"	rmass.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{47594C51-574a-434e-4759-4C51574A434e}	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
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
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe	rmass.exe

Executes dropped EXE 2 IoCs

pid	Process
1896	rmass.exe
1332	rmass.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4600-0-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/files/0x000900000002351a-7.dat	upx
behavioral2/memory/4600-12-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/1332-18-0x0000000000400000-0x0000000000411000-memory.dmp	upx
behavioral2/memory/1896-52-0x0000000000400000-0x0000000000411000-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\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

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	e2e7ded53edeb4d9b01c6c8073f1820df39ae8ed1e29204a64f67f739c0f6f5f.exe
File opened for modification	C:\Windows\SysWOW64\ntdbg.exe	rmass.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 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\rmass.exe	e2e7ded53edeb4d9b01c6c8073f1820df39ae8ed1e29204a64f67f739c0f6f5f.exe
File opened for modification	C:\Windows\SysWOW64\rmass.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\idbg32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\aset32.exe	rmass.exe
File opened for modification	C:\Windows\SysWOW64\ahuy.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
1896	rmass.exe
1896	rmass.exe
1896	rmass.exe
1896	rmass.exe
1896	rmass.exe
1896	rmass.exe
1332	rmass.exe
1332	rmass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4600	e2e7ded53edeb4d9b01c6c8073f1820df39ae8ed1e29204a64f67f739c0f6f5f.exe
Token: SeDebugPrivilege	1896	rmass.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4600 wrote to memory of 1896	4600	e2e7ded53edeb4d9b01c6c8073f1820df39ae8ed1e29204a64f67f739c0f6f5f.exe	89
PID 4600 wrote to memory of 1896	4600	e2e7ded53edeb4d9b01c6c8073f1820df39ae8ed1e29204a64f67f739c0f6f5f.exe	89
PID 4600 wrote to memory of 1896	4600	e2e7ded53edeb4d9b01c6c8073f1820df39ae8ed1e29204a64f67f739c0f6f5f.exe	89
PID 1896 wrote to memory of 612	1896	rmass.exe	5
PID 1896 wrote to memory of 3524	1896	rmass.exe	56
PID 1896 wrote to memory of 1332	1896	rmass.exe	90
PID 1896 wrote to memory of 1332	1896	rmass.exe	90
PID 1896 wrote to memory of 1332	1896	rmass.exe	90

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:612

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3524
- C:\Users\Admin\AppData\Local\Temp\e2e7ded53edeb4d9b01c6c8073f1820df39ae8ed1e29204a64f67f739c0f6f5f.exe
  "C:\Users\Admin\AppData\Local\Temp\e2e7ded53edeb4d9b01c6c8073f1820df39ae8ed1e29204a64f67f739c0f6f5f.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4600
- - 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:1896
  - - C:\Windows\SysWOW64\rmass.exe
      --k33p
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:1332

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=1668,i,1999448010053300448,1112699187621658374,262144 --variations-seed-version --mojo-platform-channel-handle=3404 /prefetch:8
1⤵
PID:2696

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

RECOVER32.DLL

Path C:\Windows\SysWOW64\RECOVER32.DLL
Size 5KB
SHA256 9e00af53b1d0c0f5270d94a666d95aa7b4dcb9fea49487c210c055c9dcfcc9eb
MD5 2b2c28a7a01f9584fe220ef84003427f
SHA1 5fc023df0b5064045eb8de7f2dbe26f07f6fec70
SHA512 39192a8a91dec1abff25af8dac0cf39da4dfd51b3fb4f1ef0b4e776185d4280fbe8387c2ea778da7bbf2ce288b0bce4d23cbe8d9e87bbd250159044f5adbac78
SSDEEP 48:6CsrGV5e2/WJbm73k2vZcsrkqSq2cxc2G5ZwJOFl:SqV5Roa73kQ/kqqAD
MD5 SHA1 SHA512 SSDEEP

Submit Download

ahuy.exe

Path C:\Windows\SysWOW64\ahuy.exe
Size 24KB
SHA256 3cbef927e56eacd243d083aea96c61c484f7f5d978a9779f9cecdbf225936416
MD5 f321bcb46120b6932a5972f0dc79bc69
SHA1 39cdc2482cece5f236e063b3c2d340df535fd7c5
SHA512 62bfe71cae25ed6259e927b16b6d3bd6856ed2b651bb6fabee5410dadc85ee8ad67cf0f9e8a6bafd32d6e0317eb3f82911d1d077b3ea33e28698a385217ebeec
SSDEEP 384:jIz4u6Dk+r7+AHmXYws6Yv4F/1i9W0o4Xail/eIuonIEUWPh:jIUuI2AjEbi8GX5XUWPh
MD5 SHA1 SHA512 SSDEEP

Submit Download

ntdbg.exe

Path C:\Windows\SysWOW64\ntdbg.exe
Size 25KB
SHA256 362d32be01d64a745fef52e6ab18f50ccfd14b00329a7e4f7c3a94d6a4acc2ff
MD5 33d70f653175f47e9f1e3722f1da6c39
SHA1 ec5efc449fed18e0d991cf71bf0d133a7bc9cc96
SHA512 04bbb47b41cc489fbed2f3fcf42fecd9f59aa2d37297154ea433f08556399723d3378f46da2eee4c6d3221c4c3b01bb1268ba91e39e98a0b94fea9721a701606
SSDEEP 384:ErzPq+M5OJpAmmV6mEZT6ZVlavIsQD+gp1ka9BxrDeXyfhEUP:ErzqxaOmWHo6nrs8/kIXP
MD5 SHA1 SHA512 SSDEEP

Submit Download

rmass.exe

Path C:\Windows\SysWOW64\rmass.exe
Size 22KB
SHA256 e2e7ded53edeb4d9b01c6c8073f1820df39ae8ed1e29204a64f67f739c0f6f5f
MD5 2be528b4d2ddb4d37d4e916a334d030a
SHA1 51510972d8d3a80b0c9f0fbed8b28cb9bbf17791
SHA512 f8a8c40aab9c87c5842806c6025a97718f6479d130cdb55936aed384b22acb0031b5e1c2485bdc90dc5368ab0861623bc5f23009ce99c7c4c3bcac87df440d91
SSDEEP 384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvX8Mb7a6c8j:rRkiLw3HsDSARGG/MMb7rcE
MD5 SHA1 SHA512 SSDEEP

Submit Download

hosts

Path C:\Windows\System32\drivers\etc\hosts
Size 1KB
SHA256 15c7218eb9cef5fa0573db657b15ce3a5f0e0609f1166df8098ca7152df505b4
MD5 6f47b62de25d1745e296a06b3f98ed19
SHA1 a688bb35a4c8a5cc198985d624a1b5a6ac5b9f6f
SHA512 dea26fff8060f44bf20fe4fff2ecbacf428727f10c0f5886fb4813e28fce9cbc3d088337c84edd9857b18514c83f1bb1cf0f51518aaecef09f30e921f4d758d7
MD5 SHA1 SHA512

Submit Download

memory/1332-18-0x0000000000400000-0x0000000000411000-memory.dmp

Download

memory/1896-52-0x0000000000400000-0x0000000000411000-memory.dmp

Download

memory/4600-0-0x0000000000400000-0x0000000000411000-memory.dmp

Download

memory/4600-12-0x0000000000400000-0x0000000000411000-memory.dmp

Download