agenttesla | 499a7b4ac1d0a8492c824d6d0ae6332440d23fe1cbb94cce9c46dd31b69c5e9b

Resubmissions

03-07-2023 02:15

230703-cp3aqaed48 10

03-07-2023 01:26

230703-btm6xsec55 10

Analysis

max time kernel
187s
max time network
177s
platform
windows10-1703_x64
resource
win10-20230621-en
resource tags

arch:x64arch:x86image:win10-20230621-enlocale:en-usos:windows10-1703-x64system
submitted
03-07-2023 02:15

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General

Target

NitroRansomware.exe
Size

1.3MB
MD5

b22fc12931613892b91226393a8b4223
SHA1

aa0623f250393cff21a47e814ef69d53e7ac3e06
SHA256

499a7b4ac1d0a8492c824d6d0ae6332440d23fe1cbb94cce9c46dd31b69c5e9b
SHA512

819d126d0394a826b92cdfd21e9c4eb12acc44932c988bc576e9d0db033ee7405b96603f64be0e58dbe4c121aee8896687718bc57e8c06f5b1326d4a41ba441e
SSDEEP

24576:ZoYGGwodngwtlaHxN8KUWVe6tw2wvKhLnekqjVnlqud+/2P+Air:ZoYGjodngwwHv5VbtHw1kqXfd+/9A

Score

10^/10

agenttesla nitro evasion keylogger persistence ransomware spyware stealer trojan

Malware Config

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
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

AgentTesla payload 1 IoCs

resource	yara_rule
behavioral1/memory/3316-214-0x00000000086B0000-0x00000000088A6000-memory.dmp	family_agenttesla

Disables Task Manager via registry modification
evasion

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\FindRegister.png.lmao	NitroRansomware.exe
File created	C:\Users\Admin\Pictures\FindSend.png.lmao	NitroRansomware.exe
File created	C:\Users\Admin\Pictures\NewImport.crw.lmao	NitroRansomware.exe
File created	C:\Users\Admin\Pictures\SubmitSet.tif.lmao	NitroRansomware.exe
File created	C:\Users\Admin\Pictures\BackupDeny.tiff.lmao	NitroRansomware.exe
File opened for modification	C:\Users\Admin\Pictures\BackupDeny.tiff	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-1-5-21-3592352177-2971570228-3741369827-1000\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\desktop.ini	NitroRansomware.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	NitroRansomware.exe
File opened for modification	C:\Users\Admin\Documents\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
2	api.ipify.org
1	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-1-5-21-3592352177-2971570228-3741369827-1000\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
2544	tasklist.exe

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	NitroRansomware.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer	NitroRansomware.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemVersion	NitroRansomware.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3316	NitroRansomware.exe
3316	NitroRansomware.exe

Suspicious use of AdjustPrivilegeToken 44 IoCs

description	pid	Process
Token: SeDebugPrivilege	3316	NitroRansomware.exe
Token: SeIncreaseQuotaPrivilege	2956	wmic.exe
Token: SeSecurityPrivilege	2956	wmic.exe
Token: SeTakeOwnershipPrivilege	2956	wmic.exe
Token: SeLoadDriverPrivilege	2956	wmic.exe
Token: SeSystemProfilePrivilege	2956	wmic.exe
Token: SeSystemtimePrivilege	2956	wmic.exe
Token: SeProfSingleProcessPrivilege	2956	wmic.exe
Token: SeIncBasePriorityPrivilege	2956	wmic.exe
Token: SeCreatePagefilePrivilege	2956	wmic.exe
Token: SeBackupPrivilege	2956	wmic.exe
Token: SeRestorePrivilege	2956	wmic.exe
Token: SeShutdownPrivilege	2956	wmic.exe
Token: SeDebugPrivilege	2956	wmic.exe
Token: SeSystemEnvironmentPrivilege	2956	wmic.exe
Token: SeRemoteShutdownPrivilege	2956	wmic.exe
Token: SeUndockPrivilege	2956	wmic.exe
Token: SeManageVolumePrivilege	2956	wmic.exe
Token: 33	2956	wmic.exe
Token: 34	2956	wmic.exe
Token: 35	2956	wmic.exe
Token: 36	2956	wmic.exe
Token: SeIncreaseQuotaPrivilege	2956	wmic.exe
Token: SeSecurityPrivilege	2956	wmic.exe
Token: SeTakeOwnershipPrivilege	2956	wmic.exe
Token: SeLoadDriverPrivilege	2956	wmic.exe
Token: SeSystemProfilePrivilege	2956	wmic.exe
Token: SeSystemtimePrivilege	2956	wmic.exe
Token: SeProfSingleProcessPrivilege	2956	wmic.exe
Token: SeIncBasePriorityPrivilege	2956	wmic.exe
Token: SeCreatePagefilePrivilege	2956	wmic.exe
Token: SeBackupPrivilege	2956	wmic.exe
Token: SeRestorePrivilege	2956	wmic.exe
Token: SeShutdownPrivilege	2956	wmic.exe
Token: SeDebugPrivilege	2956	wmic.exe
Token: SeSystemEnvironmentPrivilege	2956	wmic.exe
Token: SeRemoteShutdownPrivilege	2956	wmic.exe
Token: SeUndockPrivilege	2956	wmic.exe
Token: SeManageVolumePrivilege	2956	wmic.exe
Token: 33	2956	wmic.exe
Token: 34	2956	wmic.exe
Token: 35	2956	wmic.exe
Token: 36	2956	wmic.exe
Token: SeDebugPrivilege	2544	tasklist.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3316 wrote to memory of 2956	3316	NitroRansomware.exe	67
PID 3316 wrote to memory of 2956	3316	NitroRansomware.exe	67
PID 3316 wrote to memory of 2956	3316	NitroRansomware.exe	67
PID 3316 wrote to memory of 2544	3316	NitroRansomware.exe	69
PID 3316 wrote to memory of 2544	3316	NitroRansomware.exe	69
PID 3316 wrote to memory of 2544	3316	NitroRansomware.exe	69

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
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:3316
- C:\Windows\SysWOW64\Wbem\wmic.exe
  "wmic" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2956
- C:\Windows\SysWOW64\tasklist.exe
  "tasklist"
  2⤵
  - Enumerates processes with tasklist
  - Suspicious use of AdjustPrivilegeToken
  PID:2544

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Defacement

T1491

Replay Monitor

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Downloads

memory/3316-117-0x0000000000DD0000-0x0000000000F1E000-memory.dmp

Filesize
1.3MB

Download
memory/3316-118-0x0000000005DC0000-0x00000000062BE000-memory.dmp

Filesize
5.0MB

Download
memory/3316-119-0x00000000057E0000-0x0000000005872000-memory.dmp

Filesize
584KB

Download
memory/3316-120-0x0000000005740000-0x00000000057A6000-memory.dmp

Filesize
408KB

Download
memory/3316-121-0x00000000058B0000-0x00000000058C0000-memory.dmp

Filesize
64KB

Download
memory/3316-124-0x0000000007130000-0x00000000071E2000-memory.dmp

Filesize
712KB

Download
memory/3316-125-0x0000000007270000-0x00000000072E6000-memory.dmp

Filesize
472KB

Download
memory/3316-126-0x00000000072F0000-0x0000000007312000-memory.dmp

Filesize
136KB

Download
memory/3316-127-0x00000000067F0000-0x000000000680E000-memory.dmp

Filesize
120KB

Download
memory/3316-134-0x00000000058B0000-0x00000000058C0000-memory.dmp

Filesize
64KB

Download
memory/3316-213-0x0000000001560000-0x000000000156A000-memory.dmp

Filesize
40KB

Download
memory/3316-214-0x00000000086B0000-0x00000000088A6000-memory.dmp

Filesize
2.0MB

Download
memory/3316-215-0x00000000058B0000-0x00000000058C0000-memory.dmp

Filesize
64KB

Download
memory/3316-216-0x00000000058B0000-0x00000000058C0000-memory.dmp

Filesize
64KB

Download
memory/3316-217-0x00000000058B0000-0x00000000058C0000-memory.dmp

Filesize
64KB

Download
memory/3316-218-0x00000000058B0000-0x00000000058C0000-memory.dmp

Filesize
64KB

Download