agenttesla | 6d65adceb3723db328eac3601cbb540d40bcad7289e98804e977fe24a22d747f

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01-07-2023 10:36

230701-mngyhagf75 10

01-07-2023 10:34

230701-ml5lsagf74 10

01-07-2023 10:31

230701-mkjb6ahg8t 10

01-07-2023 10:19

230701-mc171agf63 10

Analysis

max time kernel
136s
max time network
86s
platform
windows10-1703_x64
resource
win10-20230621-en
resource tags

arch:x64arch:x86image:win10-20230621-enlocale:en-usos:windows10-1703-x64system
submitted
01-07-2023 10:31

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General

Target

NitroRansomware.exe
Size

1.0MB
MD5

67158b9c2184e40339161fddffa9e850
SHA1

5715c4610d84a077de42b5d031ec70ad77a8433e
SHA256

6d65adceb3723db328eac3601cbb540d40bcad7289e98804e977fe24a22d747f
SHA512

617cecfee0d7ad0002cd1fb6782bbadc0642b4513d0b4b195fa94475d774acf8e7a943128ca448bd451573b1642c665b36035adfa12e5ec02cbbdbe4474777a1
SSDEEP

24576:0rYGGjodngwtlaHxN8KUWVe6tw2wvKhLnTU:0rYG2odngwwHv5VbtHw

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/2312-216-0x0000000007780000-0x0000000007976000-memory.dmp	family_agenttesla

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\SaveSend.tif.lmao	NitroRansomware.exe
File created	C:\Users\Admin\Pictures\UninstallCheckpoint.tif.lmao	NitroRansomware.exe
File created	C:\Users\Admin\Pictures\ClearOptimize.tif.lmao	NitroRansomware.exe
File created	C:\Users\Admin\Pictures\CompleteStep.raw.lmao	NitroRansomware.exe
File created	C:\Users\Admin\Pictures\LimitDisable.raw.lmao	NitroRansomware.exe
File created	C:\Users\Admin\Pictures\RedoEnable.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-1-5-21-1032500962-593345068-3128969974-1000\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\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\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
1	api.ipify.org
2	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-1-5-21-1032500962-593345068-3128969974-1000\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
2124	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
2312	NitroRansomware.exe
2312	NitroRansomware.exe

Suspicious use of AdjustPrivilegeToken 44 IoCs

description	pid	Process
Token: SeDebugPrivilege	2312	NitroRansomware.exe
Token: SeIncreaseQuotaPrivilege	2940	wmic.exe
Token: SeSecurityPrivilege	2940	wmic.exe
Token: SeTakeOwnershipPrivilege	2940	wmic.exe
Token: SeLoadDriverPrivilege	2940	wmic.exe
Token: SeSystemProfilePrivilege	2940	wmic.exe
Token: SeSystemtimePrivilege	2940	wmic.exe
Token: SeProfSingleProcessPrivilege	2940	wmic.exe
Token: SeIncBasePriorityPrivilege	2940	wmic.exe
Token: SeCreatePagefilePrivilege	2940	wmic.exe
Token: SeBackupPrivilege	2940	wmic.exe
Token: SeRestorePrivilege	2940	wmic.exe
Token: SeShutdownPrivilege	2940	wmic.exe
Token: SeDebugPrivilege	2940	wmic.exe
Token: SeSystemEnvironmentPrivilege	2940	wmic.exe
Token: SeRemoteShutdownPrivilege	2940	wmic.exe
Token: SeUndockPrivilege	2940	wmic.exe
Token: SeManageVolumePrivilege	2940	wmic.exe
Token: 33	2940	wmic.exe
Token: 34	2940	wmic.exe
Token: 35	2940	wmic.exe
Token: 36	2940	wmic.exe
Token: SeIncreaseQuotaPrivilege	2940	wmic.exe
Token: SeSecurityPrivilege	2940	wmic.exe
Token: SeTakeOwnershipPrivilege	2940	wmic.exe
Token: SeLoadDriverPrivilege	2940	wmic.exe
Token: SeSystemProfilePrivilege	2940	wmic.exe
Token: SeSystemtimePrivilege	2940	wmic.exe
Token: SeProfSingleProcessPrivilege	2940	wmic.exe
Token: SeIncBasePriorityPrivilege	2940	wmic.exe
Token: SeCreatePagefilePrivilege	2940	wmic.exe
Token: SeBackupPrivilege	2940	wmic.exe
Token: SeRestorePrivilege	2940	wmic.exe
Token: SeShutdownPrivilege	2940	wmic.exe
Token: SeDebugPrivilege	2940	wmic.exe
Token: SeSystemEnvironmentPrivilege	2940	wmic.exe
Token: SeRemoteShutdownPrivilege	2940	wmic.exe
Token: SeUndockPrivilege	2940	wmic.exe
Token: SeManageVolumePrivilege	2940	wmic.exe
Token: 33	2940	wmic.exe
Token: 34	2940	wmic.exe
Token: 35	2940	wmic.exe
Token: 36	2940	wmic.exe
Token: SeDebugPrivilege	2124	tasklist.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2312 wrote to memory of 2940	2312	NitroRansomware.exe	67
PID 2312 wrote to memory of 2940	2312	NitroRansomware.exe	67
PID 2312 wrote to memory of 2940	2312	NitroRansomware.exe	67
PID 2312 wrote to memory of 2124	2312	NitroRansomware.exe	69
PID 2312 wrote to memory of 2124	2312	NitroRansomware.exe	69
PID 2312 wrote to memory of 2124	2312	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:2312
- C:\Windows\SysWOW64\Wbem\wmic.exe
  "wmic" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2940
- C:\Windows\SysWOW64\tasklist.exe
  "tasklist"
  2⤵
  - Enumerates processes with tasklist
  - Suspicious use of AdjustPrivilegeToken
  PID:2124

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/2312-121-0x0000000000FE0000-0x00000000010EA000-memory.dmp

Filesize
1.0MB

Download
memory/2312-122-0x0000000005EB0000-0x00000000063AE000-memory.dmp

Filesize
5.0MB

Download
memory/2312-123-0x0000000005A60000-0x0000000005AF2000-memory.dmp

Filesize
584KB

Download
memory/2312-124-0x0000000005C00000-0x0000000005C66000-memory.dmp

Filesize
408KB

Download
memory/2312-125-0x00000000059A0000-0x00000000059B0000-memory.dmp

Filesize
64KB

Download
memory/2312-128-0x00000000059A0000-0x00000000059B0000-memory.dmp

Filesize
64KB

Download
memory/2312-215-0x0000000001670000-0x000000000167A000-memory.dmp

Filesize
40KB

Download
memory/2312-216-0x0000000007780000-0x0000000007976000-memory.dmp

Filesize
2.0MB

Download
memory/2312-217-0x00000000059A0000-0x00000000059B0000-memory.dmp

Filesize
64KB

Download
memory/2312-218-0x00000000059A0000-0x00000000059B0000-memory.dmp

Filesize
64KB

Download
memory/2312-219-0x00000000059A0000-0x00000000059B0000-memory.dmp

Filesize
64KB

Download
memory/2312-220-0x00000000059A0000-0x00000000059B0000-memory.dmp

Filesize
64KB

Download