nitro | 7dc509779753238fde335d4471b1c14f3cdb81c44a0bf8063263e668d7b551d0

Resubmissions

05-07-2023 01:56

230705-ccwbmsab88 10

05-07-2023 01:53

230705-cbf6bsbg5w 10

Analysis

max time kernel
76s
max time network
72s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
05-07-2023 01:53

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General

Target

NitroRansomware.exe
Size

1.7MB
MD5

e18bbc64d2e7eab468dfb1eb524e4136
SHA1

4ea066712286c05c02160bfdcbf8ad2a903e5a1b
SHA256

7dc509779753238fde335d4471b1c14f3cdb81c44a0bf8063263e668d7b551d0
SHA512

d5d2655146a21e94cb393acfa520f5e90757162ff850ba87e99ef598fb9135c4978859bfd843ee94923685ea3d1ad47b9393edb0adb9d4fa48884f7602026f78
SSDEEP

49152:LocYGwfZPnlXMTdngwwHv5VbtHw1kqXfd+/9AE:LoBDZdcNgNhVRw1kqXf0F

Score

10^/10

nitro evasion persistence ransomware trojan

Malware Config

Signatures

Nitro
A ransomware that demands Discord nitro gift codes to decrypt files.
ransomware nitro

UAC bypass 3 TTPs 1 IoCs

evasion trojan

Bypass User Account Control

T1088

Disabling Security Tools

T1089

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	NitroRansomware.exe

Disables Task Manager via registry modification
evasion

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	NitroRansomware.exe

Modifies extensions of user files 6 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File created	C:\Users\Admin\Pictures\BlockUnprotect.raw.lmao	NitroRansomware.exe
File created	C:\Users\Admin\Pictures\ConvertFromDeny.crw.lmao	NitroRansomware.exe
File created	C:\Users\Admin\Pictures\EnterUnregister.png.lmao	NitroRansomware.exe
File created	C:\Users\Admin\Pictures\OutWait.raw.lmao	NitroRansomware.exe
File created	C:\Users\Admin\Pictures\StepEdit.png.lmao	NitroRansomware.exe
File created	C:\Users\Admin\Pictures\WaitConvertTo.raw.lmao	NitroRansomware.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-618519468-4027732583-1827558364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\NR = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\NitroRansomware.exe\""	NitroRansomware.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	NitroRansomware.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	NitroRansomware.exe

Drops desktop.ini file(s) 5 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\Documents\desktop.ini	NitroRansomware.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	NitroRansomware.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	NitroRansomware.exe
File opened for modification	C:\Users\Admin\Pictures\Camera Roll\desktop.ini	NitroRansomware.exe
File opened for modification	C:\Users\Admin\Pictures\Saved Pictures\desktop.ini	NitroRansomware.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
8	api.ipify.org
9	api.ipify.org

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-618519468-4027732583-1827558364-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Roaming\\wallpaper.png"	NitroRansomware.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4432	4012	WerFault.exe	79
1788	4012	WerFault.exe	79

Enumerates processes with tasklist 1 TTPs 1 IoCs

Process Discovery

T1057

pid	Process
4076	tasklist.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4012	NitroRansomware.exe
4012	NitroRansomware.exe

Suspicious use of AdjustPrivilegeToken 44 IoCs

description	pid	Process
Token: SeDebugPrivilege	4012	NitroRansomware.exe
Token: SeIncreaseQuotaPrivilege	1496	wmic.exe
Token: SeSecurityPrivilege	1496	wmic.exe
Token: SeTakeOwnershipPrivilege	1496	wmic.exe
Token: SeLoadDriverPrivilege	1496	wmic.exe
Token: SeSystemProfilePrivilege	1496	wmic.exe
Token: SeSystemtimePrivilege	1496	wmic.exe
Token: SeProfSingleProcessPrivilege	1496	wmic.exe
Token: SeIncBasePriorityPrivilege	1496	wmic.exe
Token: SeCreatePagefilePrivilege	1496	wmic.exe
Token: SeBackupPrivilege	1496	wmic.exe
Token: SeRestorePrivilege	1496	wmic.exe
Token: SeShutdownPrivilege	1496	wmic.exe
Token: SeDebugPrivilege	1496	wmic.exe
Token: SeSystemEnvironmentPrivilege	1496	wmic.exe
Token: SeRemoteShutdownPrivilege	1496	wmic.exe
Token: SeUndockPrivilege	1496	wmic.exe
Token: SeManageVolumePrivilege	1496	wmic.exe
Token: 33	1496	wmic.exe
Token: 34	1496	wmic.exe
Token: 35	1496	wmic.exe
Token: 36	1496	wmic.exe
Token: SeIncreaseQuotaPrivilege	1496	wmic.exe
Token: SeSecurityPrivilege	1496	wmic.exe
Token: SeTakeOwnershipPrivilege	1496	wmic.exe
Token: SeLoadDriverPrivilege	1496	wmic.exe
Token: SeSystemProfilePrivilege	1496	wmic.exe
Token: SeSystemtimePrivilege	1496	wmic.exe
Token: SeProfSingleProcessPrivilege	1496	wmic.exe
Token: SeIncBasePriorityPrivilege	1496	wmic.exe
Token: SeCreatePagefilePrivilege	1496	wmic.exe
Token: SeBackupPrivilege	1496	wmic.exe
Token: SeRestorePrivilege	1496	wmic.exe
Token: SeShutdownPrivilege	1496	wmic.exe
Token: SeDebugPrivilege	1496	wmic.exe
Token: SeSystemEnvironmentPrivilege	1496	wmic.exe
Token: SeRemoteShutdownPrivilege	1496	wmic.exe
Token: SeUndockPrivilege	1496	wmic.exe
Token: SeManageVolumePrivilege	1496	wmic.exe
Token: 33	1496	wmic.exe
Token: 34	1496	wmic.exe
Token: 35	1496	wmic.exe
Token: 36	1496	wmic.exe
Token: SeDebugPrivilege	4076	tasklist.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4012 wrote to memory of 1496	4012	NitroRansomware.exe	82
PID 4012 wrote to memory of 1496	4012	NitroRansomware.exe	82
PID 4012 wrote to memory of 1496	4012	NitroRansomware.exe	82
PID 4012 wrote to memory of 4076	4012	NitroRansomware.exe	84
PID 4012 wrote to memory of 4076	4012	NitroRansomware.exe	84
PID 4012 wrote to memory of 4076	4012	NitroRansomware.exe	84

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	NitroRansomware.exe

C:\Users\Admin\AppData\Local\Temp\NitroRansomware.exe
"C:\Users\Admin\AppData\Local\Temp\NitroRansomware.exe"
1⤵
- UAC bypass
- Drops file in Drivers directory
- Modifies extensions of user files
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops desktop.ini file(s)
- Sets desktop wallpaper using registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:4012
- C:\Windows\SysWOW64\Wbem\wmic.exe
  "wmic" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1496
- C:\Windows\SysWOW64\tasklist.exe
  "tasklist"
  2⤵
  - Enumerates processes with tasklist
  - Suspicious use of AdjustPrivilegeToken
  PID:4076
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4012 -s 2464
  2⤵
  - Program crash
  PID:4432
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4012 -s 2464
  2⤵
  - Program crash
  PID:1788

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 4012 -ip 4012
1⤵
PID:2684

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 4012 -ip 4012
1⤵
PID:1720

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Bypass User Account Control

T1088

Defense Evasion

Bypass User Account Control

T1088

Disabling Security Tools

T1089

Modify Registry

T1112

Credential Access

Discovery

Process Discovery

T1057

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Defacement

T1491

Replay Monitor

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Downloads

memory/4012-133-0x00000000004C0000-0x0000000000674000-memory.dmp

Filesize
1.7MB

Download
memory/4012-134-0x0000000005690000-0x0000000005C34000-memory.dmp

Filesize
5.6MB

Download
memory/4012-135-0x00000000050E0000-0x0000000005172000-memory.dmp

Filesize
584KB

Download
memory/4012-137-0x0000000007A10000-0x0000000007A76000-memory.dmp

Filesize
408KB

Download
memory/4012-138-0x00000000050D0000-0x00000000050E0000-memory.dmp

Filesize
64KB

Download
memory/4012-141-0x0000000005330000-0x00000000053A6000-memory.dmp

Filesize
472KB

Download
memory/4012-142-0x00000000053E0000-0x0000000005402000-memory.dmp

Filesize
136KB

Download
memory/4012-143-0x0000000005410000-0x000000000542E000-memory.dmp

Filesize
120KB

Download
memory/4012-150-0x00000000050D0000-0x00000000050E0000-memory.dmp

Filesize
64KB

Download
memory/4012-238-0x00000000007A0000-0x00000000007AA000-memory.dmp

Filesize
40KB

Download