nitro | c853ee6eb1abf28eab76d035f1b5b5548563f375f0f98335aa0853e8a66181b3

Analysis

max time kernel
82s
max time network
89s
platform
windows10-2004_x64
resource
win10v2004-20230621-en
resource tags

arch:x64arch:x86image:win10v2004-20230621-enlocale:en-usos:windows10-2004-x64system
submitted
02-07-2023 23:10

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General

Target

NitroRansomware.exe
Size

1.3MB
MD5

d8bc15d7823c0db0882be71f853ce8f7
SHA1

b17969bbc6826d6d33ab6ca6b9cfad0af46d6ec8
SHA256

c853ee6eb1abf28eab76d035f1b5b5548563f375f0f98335aa0853e8a66181b3
SHA512

222926d57978c16b6ad3b7a487c3c862f932e5dd734e6e889026996fcb37b2168dd205f29201549dad5c7955775e6b3b8bf5f960df06504419ed5369de082c2a
SSDEEP

24576:WNYGGwodngwtlaHxN8KUWVe6tw2wvKhLnekqjVnlqud+/2P+AP3:WNYGjodngwwHv5VbtHw1kqXfd+/9A

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

Modifies extensions of user files 4 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File created	C:\Users\Admin\Pictures\ReceiveSwitch.crw.lmao	NitroRansomware.exe
File created	C:\Users\Admin\Pictures\ResolveConnect.tiff.lmao	NitroRansomware.exe
File opened for modification	C:\Users\Admin\Pictures\ResolveConnect.tiff	NitroRansomware.exe
File created	C:\Users\Admin\Pictures\StopJoin.crw.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-1-5-21-922299981-3641064733-3870770889-1000\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\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
File opened for modification	C:\Users\Admin\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
42	api.ipify.org
43	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-1-5-21-922299981-3641064733-3870770889-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Roaming\\wallpaper.png"	NitroRansomware.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
864	4184	WerFault.exe	85
3668	4184	WerFault.exe	85

Enumerates processes with tasklist 1 TTPs 1 IoCs

Process Discovery

T1057

pid	Process
860	tasklist.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4184	NitroRansomware.exe
4184	NitroRansomware.exe

Suspicious use of AdjustPrivilegeToken 44 IoCs

description	pid	Process
Token: SeDebugPrivilege	4184	NitroRansomware.exe
Token: SeIncreaseQuotaPrivilege	4416	wmic.exe
Token: SeSecurityPrivilege	4416	wmic.exe
Token: SeTakeOwnershipPrivilege	4416	wmic.exe
Token: SeLoadDriverPrivilege	4416	wmic.exe
Token: SeSystemProfilePrivilege	4416	wmic.exe
Token: SeSystemtimePrivilege	4416	wmic.exe
Token: SeProfSingleProcessPrivilege	4416	wmic.exe
Token: SeIncBasePriorityPrivilege	4416	wmic.exe
Token: SeCreatePagefilePrivilege	4416	wmic.exe
Token: SeBackupPrivilege	4416	wmic.exe
Token: SeRestorePrivilege	4416	wmic.exe
Token: SeShutdownPrivilege	4416	wmic.exe
Token: SeDebugPrivilege	4416	wmic.exe
Token: SeSystemEnvironmentPrivilege	4416	wmic.exe
Token: SeRemoteShutdownPrivilege	4416	wmic.exe
Token: SeUndockPrivilege	4416	wmic.exe
Token: SeManageVolumePrivilege	4416	wmic.exe
Token: 33	4416	wmic.exe
Token: 34	4416	wmic.exe
Token: 35	4416	wmic.exe
Token: 36	4416	wmic.exe
Token: SeIncreaseQuotaPrivilege	4416	wmic.exe
Token: SeSecurityPrivilege	4416	wmic.exe
Token: SeTakeOwnershipPrivilege	4416	wmic.exe
Token: SeLoadDriverPrivilege	4416	wmic.exe
Token: SeSystemProfilePrivilege	4416	wmic.exe
Token: SeSystemtimePrivilege	4416	wmic.exe
Token: SeProfSingleProcessPrivilege	4416	wmic.exe
Token: SeIncBasePriorityPrivilege	4416	wmic.exe
Token: SeCreatePagefilePrivilege	4416	wmic.exe
Token: SeBackupPrivilege	4416	wmic.exe
Token: SeRestorePrivilege	4416	wmic.exe
Token: SeShutdownPrivilege	4416	wmic.exe
Token: SeDebugPrivilege	4416	wmic.exe
Token: SeSystemEnvironmentPrivilege	4416	wmic.exe
Token: SeRemoteShutdownPrivilege	4416	wmic.exe
Token: SeUndockPrivilege	4416	wmic.exe
Token: SeManageVolumePrivilege	4416	wmic.exe
Token: 33	4416	wmic.exe
Token: 34	4416	wmic.exe
Token: 35	4416	wmic.exe
Token: 36	4416	wmic.exe
Token: SeDebugPrivilege	860	tasklist.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4184 wrote to memory of 4416	4184	NitroRansomware.exe	86
PID 4184 wrote to memory of 4416	4184	NitroRansomware.exe	86
PID 4184 wrote to memory of 4416	4184	NitroRansomware.exe	86
PID 4184 wrote to memory of 860	4184	NitroRansomware.exe	92
PID 4184 wrote to memory of 860	4184	NitroRansomware.exe	92
PID 4184 wrote to memory of 860	4184	NitroRansomware.exe	92

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
- 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:4184
- C:\Windows\SysWOW64\Wbem\wmic.exe
  "wmic" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4416
- C:\Windows\SysWOW64\tasklist.exe
  "tasklist"
  2⤵
  - Enumerates processes with tasklist
  - Suspicious use of AdjustPrivilegeToken
  PID:860
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4184 -s 2308
  2⤵
  - Program crash
  PID:864
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4184 -s 2308
  2⤵
  - Program crash
  PID:3668

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 4184 -ip 4184
1⤵
PID:1080

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 4184 -ip 4184
1⤵
PID:976

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/4184-133-0x0000000000FE0000-0x000000000112E000-memory.dmp

Filesize
1.3MB

Download
memory/4184-134-0x0000000006040000-0x00000000065E4000-memory.dmp

Filesize
5.6MB

Download
memory/4184-135-0x0000000005B30000-0x0000000005BC2000-memory.dmp

Filesize
584KB

Download
memory/4184-136-0x0000000005CD0000-0x0000000005D36000-memory.dmp

Filesize
408KB

Download
memory/4184-137-0x0000000005A80000-0x0000000005A90000-memory.dmp

Filesize
64KB

Download
memory/4184-140-0x0000000007710000-0x0000000007786000-memory.dmp

Filesize
472KB

Download
memory/4184-141-0x0000000007790000-0x00000000077B2000-memory.dmp

Filesize
136KB

Download
memory/4184-142-0x00000000077E0000-0x00000000077FE000-memory.dmp

Filesize
120KB

Download
memory/4184-152-0x0000000005A80000-0x0000000005A90000-memory.dmp

Filesize
64KB

Download
memory/4184-219-0x0000000001660000-0x000000000166A000-memory.dmp

Filesize
40KB

Download