nanocore | 59930cbba4dd59a8e76a13ecc22429f1ec061c79f31a0f4e0ad4a7d9de1e486f

General

Target

Builder.exe
Size

495KB
MD5

bda37ad3c62e346bc0dc3c0c5dd904ed
SHA1

ccd30af09ca5d3b725f41d33f34d826f25af6dd6
SHA256

59930cbba4dd59a8e76a13ecc22429f1ec061c79f31a0f4e0ad4a7d9de1e486f
SHA512

a8a198f1b60585abf81d76423577990c45fbcbbaaae6c866ad39d5935224f17c429d0202f23acc56b62675f8bc2110b851ad578e42e66dded1ca60edce522074
SSDEEP

12288:ZLV6Btpmk/ZAnwuKKb0660GFvJSbV1y38/Zt6Znj:hApf/OwC06GFvJY1ND6Zj

Score

10^/10

nanocore collection 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

Detected Nirsoft tools 4 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral1/memory/3004-17-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft
behavioral1/memory/3004-19-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft
behavioral1/memory/3004-20-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft
behavioral1/memory/3004-23-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft

NirSoft MailPassView 4 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/3004-17-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView
behavioral1/memory/3004-19-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView
behavioral1/memory/3004-20-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView
behavioral1/memory/3004-23-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003
Uses the VBS compiler for execution 1 TTPs

Command and Scripting Interpreter
T1059

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1898866115-3160784972-1217720036-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	vbc.exe

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\DHCP Subsystem = "C:\\Program Files (x86)\\DHCP Subsystem\\dhcpss.exe"	Builder.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	Builder.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1240 set thread context of 3004	1240	Builder.exe	89
PID 1240 set thread context of 2844	1240	Builder.exe	90

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\DHCP Subsystem\dhcpss.exe	Builder.exe

System Location Discovery: System Language Discovery 1 TTPs 5 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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Builder.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
4644	schtasks.exe
1284	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1240	Builder.exe
1240	Builder.exe
1240	Builder.exe
1240	Builder.exe
1240	Builder.exe
1240	Builder.exe
2844	vbc.exe
2844	vbc.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1240	Builder.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1240	Builder.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1240 wrote to memory of 4644	1240	Builder.exe	83
PID 1240 wrote to memory of 4644	1240	Builder.exe	83
PID 1240 wrote to memory of 4644	1240	Builder.exe	83
PID 1240 wrote to memory of 1284	1240	Builder.exe	85
PID 1240 wrote to memory of 1284	1240	Builder.exe	85
PID 1240 wrote to memory of 1284	1240	Builder.exe	85
PID 1240 wrote to memory of 3004	1240	Builder.exe	89
PID 1240 wrote to memory of 3004	1240	Builder.exe	89
PID 1240 wrote to memory of 3004	1240	Builder.exe	89
PID 1240 wrote to memory of 3004	1240	Builder.exe	89
PID 1240 wrote to memory of 3004	1240	Builder.exe	89
PID 1240 wrote to memory of 3004	1240	Builder.exe	89
PID 1240 wrote to memory of 3004	1240	Builder.exe	89
PID 1240 wrote to memory of 3004	1240	Builder.exe	89
PID 1240 wrote to memory of 3004	1240	Builder.exe	89
PID 1240 wrote to memory of 2844	1240	Builder.exe	90
PID 1240 wrote to memory of 2844	1240	Builder.exe	90
PID 1240 wrote to memory of 2844	1240	Builder.exe	90
PID 1240 wrote to memory of 2844	1240	Builder.exe	90
PID 1240 wrote to memory of 2844	1240	Builder.exe	90
PID 1240 wrote to memory of 2844	1240	Builder.exe	90
PID 1240 wrote to memory of 2844	1240	Builder.exe	90
PID 1240 wrote to memory of 2844	1240	Builder.exe	90
PID 1240 wrote to memory of 2844	1240	Builder.exe	90

C:\Users\Admin\AppData\Local\Temp\Builder.exe
"C:\Users\Admin\AppData\Local\Temp\Builder.exe"
1⤵
- Adds Run key to start application
- Checks whether UAC is enabled
- Suspicious use of SetThreadContext
- 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:1240
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks.exe" /create /f /tn "DHCP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp92BA.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:4644
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks.exe" /create /f /tn "DHCP Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp9319.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:1284
- \??\c:\windows\microsoft.net\framework\v2.0.50727\vbc.exe
  "c:\windows\microsoft.net\framework\v2.0.50727\vbc.exe" /shtml "C:\Users\Admin\AppData\Local\Temp\zrps0h4s.13n"
  2⤵
  - Accesses Microsoft Outlook accounts
  - System Location Discovery: System Language Discovery
  PID:3004
- \??\c:\windows\microsoft.net\framework\v2.0.50727\vbc.exe
  "c:\windows\microsoft.net\framework\v2.0.50727\vbc.exe" /shtml "C:\Users\Admin\AppData\Local\Temp\kauknjs4.ek5"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:2844

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\kauknjs4.ek5

Filesize
3KB

MD5
02524418240369b25b988e9884cd1c54

SHA1
42a33322d952edf6d8431d4cd788bbc863d2b890

SHA256
80b2a0874c2f734dfe1196d7ae2a7bc6ccb30df2d9281513ac33edc529a71a37

SHA512
7c5bbe911f7f0b072d6fdb89ea5759655c2b5cf9ebfddff8f2f67f956141b8ed3697ab0504f60c3992849afbbc79434043a6c04d7cf6ddd958e23354fd3a698f

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp92BA.tmp

Filesize
1KB

MD5
b5a43b9fb362d98c033e9a8b39aac74c

SHA1
e32983a42bf0a3dc9b5520ece9d8f34d99bc41d5

SHA256
75b9e1e010550532b5f9b425e98710fd6a559a4a15e4736306a4cf9593021235

SHA512
1bd7d7646790e9870f6c30bbf53e8140f20172eddedf72b8f3242d1daf192dbce03562a34f9da1b838d2fe87bdd8963cf96d748319756fe017b4edb49e52649b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp9319.tmp

Filesize
1KB

MD5
2f26d92c1eeead3896820e56ec46f6f1

SHA1
d95533b61eed7d89e4ada56bc566d60e42ac1f61

SHA256
99a158463ce40c750bad6991ae1fceece305a0dbf8e209dd7147b5d539756bfa

SHA512
6c1ed12d5e1afcd9e7f327e0153786fd8594f75a995f341c408ef014e69917452a9fe99c511f0249aceb57b3045b707f1fd3f404e4086cfbf0aadcb3318db892

Download Submit
C:\Users\Admin\AppData\Local\Temp\zrps0h4s.13n

Filesize
523B

MD5
69b2a2e17e78d24abee9f1de2f04811a

SHA1
d19c109704e83876ab3527457f9418a7d053aa33

SHA256
1b1491f21e64681f8fdc27b2265e2274fb7813eecb6ad8b446d2e431f6300edd

SHA512
eb7269979bc4187520636fe3d7b3089f2c7c02e81c4ce2a738ade680f72c61c67fe9577eeaa09d3ca93f34b60be8c434d2cfbfed6566e783f6611279f056150f

Download Submit
memory/1240-1-0x0000000074B50000-0x0000000075101000-memory.dmp

Filesize
5.7MB

Download
memory/1240-2-0x0000000074B50000-0x0000000075101000-memory.dmp

Filesize
5.7MB

Download
memory/1240-9-0x0000000074B50000-0x0000000075101000-memory.dmp

Filesize
5.7MB

Download
memory/1240-13-0x0000000074B52000-0x0000000074B53000-memory.dmp

Filesize
4KB

Download
memory/1240-14-0x0000000074B50000-0x0000000075101000-memory.dmp

Filesize
5.7MB

Download
memory/1240-15-0x0000000074B50000-0x0000000075101000-memory.dmp

Filesize
5.7MB

Download
memory/1240-16-0x0000000074B50000-0x0000000075101000-memory.dmp

Filesize
5.7MB

Download
memory/1240-0-0x0000000074B52000-0x0000000074B53000-memory.dmp

Filesize
4KB

Download
memory/2844-25-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2844-27-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2844-28-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2844-34-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3004-23-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/3004-20-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/3004-19-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/3004-17-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads