nitro | 8225c8ed538083338ff8441c73e6a9faa77c6fb8b58a19355fed6edb7e4805d4

Resubmissions

04-07-2023 04:31

230704-e5fg1ace91 10

04-07-2023 04:30

230704-e4z51sba89 10

04-07-2023 04:28

230704-e34f2sce9t 10

Analysis

max time kernel
50s
max time network
55s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
04-07-2023 04:28

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General

Target

NitroRansomware.exe
Size

1.5MB
MD5

662b89fc83ffec95d0d1fb911e8b3f8e
SHA1

464d3f513e0f05ed342d1d512611fbd17560ba38
SHA256

8225c8ed538083338ff8441c73e6a9faa77c6fb8b58a19355fed6edb7e4805d4
SHA512

b23a6981f424c2165b031daed2159286786767b51b0b2dc5d31b03282c3b97306ae58b078217aef785a806e7f8dd754e8e36cb7bc5a9af507c9b08bea7a7f266
SSDEEP

49152:lpYGwfZPzodngwwHv5VbtHw1kqXfd+/9A:lmDZbIgNhVRw1kqXf0F

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 3 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File created	C:\Users\Admin\Pictures\ProtectUndo.crw.lmao	NitroRansomware.exe
File created	C:\Users\Admin\Pictures\UpdateDisconnect.tif.lmao	NitroRansomware.exe
File created	C:\Users\Admin\Pictures\GetBlock.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-1-5-21-3011986978-2180659500-3669311805-1000\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\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
File opened for modification	C:\Users\Admin\Documents\desktop.ini	NitroRansomware.exe
File opened for modification	C:\Users\Admin\Desktop\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
18	api.ipify.org
17	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-1-5-21-3011986978-2180659500-3669311805-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Roaming\\wallpaper.png"	NitroRansomware.exe

Enumerates processes with tasklist 1 TTPs 1 IoCs

Process Discovery

T1057

pid	Process
1856	tasklist.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
984	NitroRansomware.exe
984	NitroRansomware.exe

Suspicious use of AdjustPrivilegeToken 44 IoCs

description	pid	Process
Token: SeDebugPrivilege	984	NitroRansomware.exe
Token: SeIncreaseQuotaPrivilege	4632	wmic.exe
Token: SeSecurityPrivilege	4632	wmic.exe
Token: SeTakeOwnershipPrivilege	4632	wmic.exe
Token: SeLoadDriverPrivilege	4632	wmic.exe
Token: SeSystemProfilePrivilege	4632	wmic.exe
Token: SeSystemtimePrivilege	4632	wmic.exe
Token: SeProfSingleProcessPrivilege	4632	wmic.exe
Token: SeIncBasePriorityPrivilege	4632	wmic.exe
Token: SeCreatePagefilePrivilege	4632	wmic.exe
Token: SeBackupPrivilege	4632	wmic.exe
Token: SeRestorePrivilege	4632	wmic.exe
Token: SeShutdownPrivilege	4632	wmic.exe
Token: SeDebugPrivilege	4632	wmic.exe
Token: SeSystemEnvironmentPrivilege	4632	wmic.exe
Token: SeRemoteShutdownPrivilege	4632	wmic.exe
Token: SeUndockPrivilege	4632	wmic.exe
Token: SeManageVolumePrivilege	4632	wmic.exe
Token: 33	4632	wmic.exe
Token: 34	4632	wmic.exe
Token: 35	4632	wmic.exe
Token: 36	4632	wmic.exe
Token: SeIncreaseQuotaPrivilege	4632	wmic.exe
Token: SeSecurityPrivilege	4632	wmic.exe
Token: SeTakeOwnershipPrivilege	4632	wmic.exe
Token: SeLoadDriverPrivilege	4632	wmic.exe
Token: SeSystemProfilePrivilege	4632	wmic.exe
Token: SeSystemtimePrivilege	4632	wmic.exe
Token: SeProfSingleProcessPrivilege	4632	wmic.exe
Token: SeIncBasePriorityPrivilege	4632	wmic.exe
Token: SeCreatePagefilePrivilege	4632	wmic.exe
Token: SeBackupPrivilege	4632	wmic.exe
Token: SeRestorePrivilege	4632	wmic.exe
Token: SeShutdownPrivilege	4632	wmic.exe
Token: SeDebugPrivilege	4632	wmic.exe
Token: SeSystemEnvironmentPrivilege	4632	wmic.exe
Token: SeRemoteShutdownPrivilege	4632	wmic.exe
Token: SeUndockPrivilege	4632	wmic.exe
Token: SeManageVolumePrivilege	4632	wmic.exe
Token: 33	4632	wmic.exe
Token: 34	4632	wmic.exe
Token: 35	4632	wmic.exe
Token: 36	4632	wmic.exe
Token: SeDebugPrivilege	1856	tasklist.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 984 wrote to memory of 4632	984	NitroRansomware.exe	86
PID 984 wrote to memory of 4632	984	NitroRansomware.exe	86
PID 984 wrote to memory of 4632	984	NitroRansomware.exe	86
PID 984 wrote to memory of 1856	984	NitroRansomware.exe	88
PID 984 wrote to memory of 1856	984	NitroRansomware.exe	88
PID 984 wrote to memory of 1856	984	NitroRansomware.exe	88

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:984
- C:\Windows\SysWOW64\Wbem\wmic.exe
  "wmic" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4632
- C:\Windows\SysWOW64\tasklist.exe
  "tasklist"
  2⤵
  - Enumerates processes with tasklist
  - Suspicious use of AdjustPrivilegeToken
  PID:1856

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/984-133-0x0000000000640000-0x00000000007CC000-memory.dmp

Filesize
1.5MB

Download
memory/984-134-0x00000000057F0000-0x0000000005D94000-memory.dmp

Filesize
5.6MB

Download
memory/984-135-0x0000000005240000-0x00000000052D2000-memory.dmp

Filesize
584KB

Download
memory/984-136-0x0000000005350000-0x00000000053B6000-memory.dmp

Filesize
408KB

Download
memory/984-137-0x0000000005230000-0x0000000005240000-memory.dmp

Filesize
64KB

Download
memory/984-140-0x0000000007040000-0x00000000070B6000-memory.dmp

Filesize
472KB

Download
memory/984-141-0x00000000070C0000-0x00000000070E2000-memory.dmp

Filesize
136KB

Download
memory/984-142-0x00000000070F0000-0x000000000710E000-memory.dmp

Filesize
120KB

Download
memory/984-152-0x0000000005230000-0x0000000005240000-memory.dmp

Filesize
64KB

Download