5fe6a791be0a3438a7703bb94851f229f81e86e8e30f87818537f0382976d6c1

Analysis

max time kernel
142s
max time network
129s
platform
windows10-2004_x64
resource
win10v2004-20230621-en
resource tags

arch:x64arch:x86image:win10v2004-20230621-enlocale:en-usos:windows10-2004-x64system
submitted
01/07/2023, 04:20

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General

Target

Nitro.exe
Size

744KB
MD5

cca6a61f8112ae64dd18272ae6d22c00
SHA1

b89c19326e250b8e02b176d4c6d6f617fa1c55d1
SHA256

5fe6a791be0a3438a7703bb94851f229f81e86e8e30f87818537f0382976d6c1
SHA512

dad78a3c209a2962fee632aadd3286bd4e5ee9efe0bfacb3d0dde13b025f68102d2a581d787cc332b1e13641815e518713970502721d28c48f7022fea562aeb6
SSDEEP

12288:heRtB1y90+ulRrNetMy1Yc7uKyftkXnSRWyhM5eakDm3HTiw34jFju:Kj1y9WRxeSRKuJqCrNaomOw34j8

Score

7^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1060	CERTUTIL.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce	Nitro.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\""	Nitro.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4536 wrote to memory of 1060	4536	Nitro.exe	86
PID 4536 wrote to memory of 1060	4536	Nitro.exe	86

C:\Users\Admin\AppData\Local\Temp\Nitro.exe
"C:\Users\Admin\AppData\Local\Temp\Nitro.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4536
- C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\CERTUTIL.exe
  CERTUTIL - DECODE NAME.TXT NiITRO.EXE
  2⤵
  - Executes dropped EXE
  PID:1060

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\certutil.exe

Filesize
1.5MB

MD5
84114ba897175da47bec94781e843739

SHA1
85d079f7db713c4a2607b07df043d979a8cd4aaf

SHA256
a86db7bb74499c976fb00a902b905e3fea2982405344cb0f4966192f50e4dbb5

SHA512
b777adf4b6c495f2752eaa6837d5df9d9b4ce29219e0f9f581c14ab5c35596d205410883821538e8eaca8a5b621fe0d961f95ef0695878afc4583a37b28efb76

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