nanocore | 34ff10730c9e4c37d8d8671582ed5e17ce801280f587c3742aba7b478b79a338

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
08/11/2024, 01:23

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General

Target
8aefabcf687b0ce57b268952a682e4330e01842d.exe
Size 203KB
Sample241108-brsnmasbll
SHA256 34ff10730c9e4c37d8d8671582ed5e17ce801280f587c3742aba7b478b79a338
MD5 697e0f8ff4933bc74eeb786986e83161
SHA1 8aefabcf687b0ce57b268952a682e4330e01842d
SHA512 cb10ddef9e35e35858ee6e133b45b34694bdd2f8531b245db9161500057187abfa071fd4bf7bde8163a184802e59f81fc902ce9459a25cffbe0f7499f6f3d523
SSDEEP 6144:MLV6Bta6dtJmakIM5sd4SJm9dsJz1ORH4L:MLV6BtpmkBdvzORHE
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nanocore discovery 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
Nanocore family
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\ARP Monitor = "C:\\Program Files (x86)\\ARP Monitor\\arpmon.exe"	8aefabcf687b0ce57b268952a682e4330e01842d.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	8aefabcf687b0ce57b268952a682e4330e01842d.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\ARP Monitor\arpmon.exe	8aefabcf687b0ce57b268952a682e4330e01842d.exe
File created	C:\Program Files (x86)\ARP Monitor\arpmon.exe	8aefabcf687b0ce57b268952a682e4330e01842d.exe

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8aefabcf687b0ce57b268952a682e4330e01842d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
1532	schtasks.exe
4720	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
60	8aefabcf687b0ce57b268952a682e4330e01842d.exe
60	8aefabcf687b0ce57b268952a682e4330e01842d.exe
60	8aefabcf687b0ce57b268952a682e4330e01842d.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
60	8aefabcf687b0ce57b268952a682e4330e01842d.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	60	8aefabcf687b0ce57b268952a682e4330e01842d.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 60 wrote to memory of 1532	60	8aefabcf687b0ce57b268952a682e4330e01842d.exe	86
PID 60 wrote to memory of 1532	60	8aefabcf687b0ce57b268952a682e4330e01842d.exe	86
PID 60 wrote to memory of 1532	60	8aefabcf687b0ce57b268952a682e4330e01842d.exe	86
PID 60 wrote to memory of 4720	60	8aefabcf687b0ce57b268952a682e4330e01842d.exe	88
PID 60 wrote to memory of 4720	60	8aefabcf687b0ce57b268952a682e4330e01842d.exe	88
PID 60 wrote to memory of 4720	60	8aefabcf687b0ce57b268952a682e4330e01842d.exe	88

C:\Users\Admin\AppData\Local\Temp\8aefabcf687b0ce57b268952a682e4330e01842d.exe
"C:\Users\Admin\AppData\Local\Temp\8aefabcf687b0ce57b268952a682e4330e01842d.exe"
1⤵
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:60
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks.exe" /create /f /tn "ARP Monitor" /xml "C:\Users\Admin\AppData\Local\Temp\tmpAA3A.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:1532
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks.exe" /create /f /tn "ARP Monitor Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpAAA8.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:4720

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmpAA3A.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpAA3A.tmp
Size 1KB
SHA256 b5c1e5d6de760b32b9fdd91ac1571fce426ed1ef12d4be7086da3fcac03a39c1
MD5 a576466b0e88dbc61bbb7033ad257ed3
SHA1 65de8fe6a1fdbb622622b91d37ccb71cd1f4d1fa
SHA512 eabc4efbe117aa278426b76d07e285afc117fb7fa430ef9eba27808d7fd51cd81caab2d59dbe8cf8eb817f23989e6fc70415cc04ff03d2f9115030575bda67f3
MD5 SHA1 SHA512

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tmpAAA8.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpAAA8.tmp
Size 1KB
SHA256 2165ad57e4cd29e911a2861e1fe6366ce11912c95f8e5ede61d247b75753001a
MD5 acc7d7829edec6af26aa18f8ca7776ef
SHA1 29f5290d08127f29924a2eb189e21b9bcfbb6f3a
SHA512 07e84e0f7eb030dc0f2efde201c023051a2559dbdcde957fea73669a6e2deac9848cf3503e4e7f9524660d61ead850632bb998f12b73b887dfe841286002bc5b
MD5 SHA1 SHA512

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memory/60-0-0x0000000074FA2000-0x0000000074FA3000-memory.dmp

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memory/60-1-0x0000000074FA0000-0x0000000075551000-memory.dmp

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memory/60-2-0x0000000074FA0000-0x0000000075551000-memory.dmp

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memory/60-10-0x0000000074FA0000-0x0000000075551000-memory.dmp

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memory/60-11-0x0000000074FA2000-0x0000000074FA3000-memory.dmp

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memory/60-12-0x0000000074FA0000-0x0000000075551000-memory.dmp

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memory/60-13-0x0000000074FA0000-0x0000000075551000-memory.dmp

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memory/60-14-0x0000000074FA0000-0x0000000075551000-memory.dmp

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