nitro | 9a3e5872a07bf6b187b184764bab6b4e199b3de9c83454632911038d76cb2024

Resubmissions

07-07-2023 22:48

230707-2q63qsdb6x 10

07-07-2023 22:46

230707-2p3zpadb6w 10

Analysis

max time kernel
49s
max time network
38s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
07-07-2023 22:46

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General

Target

NitroRansomware.exe
Size

1.7MB
MD5

6e4c9fe77dd12b68a62fb669bc33224e
SHA1

dc6c3b8e5f286834071b5cc649395d2e5a7cf29d
SHA256

9a3e5872a07bf6b187b184764bab6b4e199b3de9c83454632911038d76cb2024
SHA512

c32526c1aaa2435d20c08ec34459830ea5788713795e237b396e80e8b6ba435873c338864eb2eda18f33eb9adfe1a7bb4984c0d051b75c69a6518bc3e2aebfb5
SSDEEP

49152:zRmYGwfZPnlXgNuTdngwwHv5VbtHw1kqXfd+/9A:zRnDZdQNuNgNhVRw1kqXf0F

Score

10^/10

nitro evasion persistence ransomware trojan

Malware Config

Extracted

Family

nitro

https://api.telegram.org/bot6006307805:AAEDDUx2GEUK5B9sfISAl5uogpVR7Py-iFY/sendMessage?chat_id=-1001950887599

Attributes

decrypt_key
e14a1a875002aa43e3b7869ef81c4f675abfcfa3563a2dbd191d0c96a03a7c75/

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 1 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File created	C:\Users\Admin\Pictures\ConvertFromSelect.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-1-5-21-4176143399-3250363947-192774652-1000\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) 3 IoCs

description	ioc	Process
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
16	api.ipify.org
17	api.ipify.org

Enumerates processes with tasklist 1 TTPs 1 IoCs

Process Discovery

T1057

pid	Process
3728	tasklist.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1656	NitroRansomware.exe
1656	NitroRansomware.exe

Suspicious use of AdjustPrivilegeToken 44 IoCs

description	pid	Process
Token: SeDebugPrivilege	1656	NitroRansomware.exe
Token: SeIncreaseQuotaPrivilege	4940	wmic.exe
Token: SeSecurityPrivilege	4940	wmic.exe
Token: SeTakeOwnershipPrivilege	4940	wmic.exe
Token: SeLoadDriverPrivilege	4940	wmic.exe
Token: SeSystemProfilePrivilege	4940	wmic.exe
Token: SeSystemtimePrivilege	4940	wmic.exe
Token: SeProfSingleProcessPrivilege	4940	wmic.exe
Token: SeIncBasePriorityPrivilege	4940	wmic.exe
Token: SeCreatePagefilePrivilege	4940	wmic.exe
Token: SeBackupPrivilege	4940	wmic.exe
Token: SeRestorePrivilege	4940	wmic.exe
Token: SeShutdownPrivilege	4940	wmic.exe
Token: SeDebugPrivilege	4940	wmic.exe
Token: SeSystemEnvironmentPrivilege	4940	wmic.exe
Token: SeRemoteShutdownPrivilege	4940	wmic.exe
Token: SeUndockPrivilege	4940	wmic.exe
Token: SeManageVolumePrivilege	4940	wmic.exe
Token: 33	4940	wmic.exe
Token: 34	4940	wmic.exe
Token: 35	4940	wmic.exe
Token: 36	4940	wmic.exe
Token: SeIncreaseQuotaPrivilege	4940	wmic.exe
Token: SeSecurityPrivilege	4940	wmic.exe
Token: SeTakeOwnershipPrivilege	4940	wmic.exe
Token: SeLoadDriverPrivilege	4940	wmic.exe
Token: SeSystemProfilePrivilege	4940	wmic.exe
Token: SeSystemtimePrivilege	4940	wmic.exe
Token: SeProfSingleProcessPrivilege	4940	wmic.exe
Token: SeIncBasePriorityPrivilege	4940	wmic.exe
Token: SeCreatePagefilePrivilege	4940	wmic.exe
Token: SeBackupPrivilege	4940	wmic.exe
Token: SeRestorePrivilege	4940	wmic.exe
Token: SeShutdownPrivilege	4940	wmic.exe
Token: SeDebugPrivilege	4940	wmic.exe
Token: SeSystemEnvironmentPrivilege	4940	wmic.exe
Token: SeRemoteShutdownPrivilege	4940	wmic.exe
Token: SeUndockPrivilege	4940	wmic.exe
Token: SeManageVolumePrivilege	4940	wmic.exe
Token: 33	4940	wmic.exe
Token: 34	4940	wmic.exe
Token: 35	4940	wmic.exe
Token: 36	4940	wmic.exe
Token: SeDebugPrivilege	3728	tasklist.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1656 wrote to memory of 4940	1656	NitroRansomware.exe	87
PID 1656 wrote to memory of 4940	1656	NitroRansomware.exe	87
PID 1656 wrote to memory of 4940	1656	NitroRansomware.exe	87
PID 1656 wrote to memory of 3728	1656	NitroRansomware.exe	89
PID 1656 wrote to memory of 3728	1656	NitroRansomware.exe	89
PID 1656 wrote to memory of 3728	1656	NitroRansomware.exe	89

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)
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1656
- C:\Windows\SysWOW64\Wbem\wmic.exe
  "wmic" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4940
- C:\Windows\SysWOW64\tasklist.exe
  "tasklist"
  2⤵
  - Enumerates processes with tasklist
  - Suspicious use of AdjustPrivilegeToken
  PID:3728

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

Replay Monitor

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Downloads

memory/1656-133-0x0000000000590000-0x0000000000748000-memory.dmp

Filesize
1.7MB

Download
memory/1656-134-0x0000000005660000-0x0000000005C04000-memory.dmp

Filesize
5.6MB

Download
memory/1656-135-0x0000000005150000-0x00000000051E2000-memory.dmp

Filesize
584KB

Download
memory/1656-137-0x0000000006FD0000-0x0000000007036000-memory.dmp

Filesize
408KB

Download
memory/1656-138-0x00000000050A0000-0x00000000050B0000-memory.dmp

Filesize
64KB

Download
memory/1656-141-0x0000000008A70000-0x0000000008AE6000-memory.dmp

Filesize
472KB

Download
memory/1656-142-0x0000000008B20000-0x0000000008B42000-memory.dmp

Filesize
136KB

Download
memory/1656-143-0x0000000008150000-0x000000000816E000-memory.dmp

Filesize
120KB

Download
memory/1656-150-0x00000000050A0000-0x00000000050B0000-memory.dmp

Filesize
64KB

Download