nanocore | 3a19f17216296e7629b3718c19525d5739dd725154ae40aebee9084963db1092

Analysis

max time kernel
133s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
16/02/2024, 04:49

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General

Target
9f7a900a67adea7dffdd46114c156af8.exe
Size 203KB
Sample240216-ffy4gsae56
SHA256 3a19f17216296e7629b3718c19525d5739dd725154ae40aebee9084963db1092
MD5 9f7a900a67adea7dffdd46114c156af8
SHA1 a1d009240ed2d3bebd03032b73d8d73699dada09
SHA512 275aea75c88b6681ba094a3e1b4c2c29279019e1b89865069096abd312ef4600cceee3d41d01d79ed310fc175b12f38c0f36c808989e09da06ce4ab08b98bdb5
SSDEEP 3072:MzEqV6B1jHa6dtJ10jgvzcgi+oG/j9iaMP2s/HItM6l9e5YBFUS68fnSpbcsN3KL:MLV6Bta6dtJmakIM5ei2H5fni/MuQfX
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nanocore evasion keylogger persistence spyware stealer trojan

Malware Config

Signatures

NanoCore
NanoCore is a remote access tool (RAT) with a variety of capabilities.
keylogger trojan stealer spyware nanocore

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\SMTP Subsystem = "C:\\Program Files (x86)\\SMTP Subsystem\\smtpss.exe"	9f7a900a67adea7dffdd46114c156af8.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	9f7a900a67adea7dffdd46114c156af8.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\SMTP Subsystem\smtpss.exe	9f7a900a67adea7dffdd46114c156af8.exe
File opened for modification	C:\Program Files (x86)\SMTP Subsystem\smtpss.exe	9f7a900a67adea7dffdd46114c156af8.exe

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
2240	schtasks.exe
1248	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
4704	9f7a900a67adea7dffdd46114c156af8.exe
4704	9f7a900a67adea7dffdd46114c156af8.exe
4704	9f7a900a67adea7dffdd46114c156af8.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4704	9f7a900a67adea7dffdd46114c156af8.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4704	9f7a900a67adea7dffdd46114c156af8.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4704 wrote to memory of 2240	4704	9f7a900a67adea7dffdd46114c156af8.exe	86
PID 4704 wrote to memory of 2240	4704	9f7a900a67adea7dffdd46114c156af8.exe	86
PID 4704 wrote to memory of 2240	4704	9f7a900a67adea7dffdd46114c156af8.exe	86
PID 4704 wrote to memory of 1248	4704	9f7a900a67adea7dffdd46114c156af8.exe	87
PID 4704 wrote to memory of 1248	4704	9f7a900a67adea7dffdd46114c156af8.exe	87
PID 4704 wrote to memory of 1248	4704	9f7a900a67adea7dffdd46114c156af8.exe	87

C:\Users\Admin\AppData\Local\Temp\9f7a900a67adea7dffdd46114c156af8.exe
"C:\Users\Admin\AppData\Local\Temp\9f7a900a67adea7dffdd46114c156af8.exe"
1⤵
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4704
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks.exe" /create /f /tn "SMTP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp419D.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:2240
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks.exe" /create /f /tn "SMTP Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp41EC.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1248

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

tmp419D.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmp419D.tmp
Size 1KB
SHA256 5135d3bf3b85c0f2a69d2818f9620cf3291a47fdc5c23d5947a9a8aec7c4056a
MD5 315d0c6636700272e98c82e90e641d2e
SHA1 0cb8b32ff68c249e719284a3219106426eaa9930
SHA512 5c0808808b7866614f7d061cb2bf56bddfeb0e48608dfd29f441b547e3ab872adabc3c8acf4fd23ed3cc6535f06f73ae069384ce3fa86e734bdad3488ae03080
MD5 SHA1 SHA512

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tmp41EC.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmp41EC.tmp
Size 1KB
SHA256 3d568a47a8944a47f4aed6982755ac7ff7dda469cc1c81c213ecaa5d89de1f83
MD5 0339b45ef206f4becc88be0d65e24b9e
SHA1 6503a1851f4ccd8c80a31f96bd7ae40d962c9fad
SHA512 c98f4513db34d50510dd986e0d812545c442bd5bef26932032b165759627fab4e00c95fe907ab3416a8a1042bfa77aa516c479f1ff7d1ec2f21ae66df8f72551
MD5 SHA1 SHA512

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memory/4704-0-0x0000000074DD0000-0x0000000075381000-memory.dmp

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memory/4704-1-0x0000000000F90000-0x0000000000FA0000-memory.dmp

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memory/4704-2-0x0000000074DD0000-0x0000000075381000-memory.dmp

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memory/4704-10-0x0000000000F90000-0x0000000000FA0000-memory.dmp

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memory/4704-11-0x0000000074DD0000-0x0000000075381000-memory.dmp

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memory/4704-12-0x0000000000F90000-0x0000000000FA0000-memory.dmp

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memory/4704-13-0x0000000000F90000-0x0000000000FA0000-memory.dmp

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