nanocore | 37a91a2334a08559850a7c830a2bbb1ceb9f313c2ddc80ad2ea4704f90b0754a

Analysis

max time kernel
175s
max time network
181s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
06-11-2022 20:13

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General

Target

Trojan-Ransom.Win32.Blocker.exe
Size

368KB
MD5

7d0216a56aa4e378e540a3219a7ddde2
SHA1

f542a482b42c7820e0794925a708c61b21a98be1
SHA256

37a91a2334a08559850a7c830a2bbb1ceb9f313c2ddc80ad2ea4704f90b0754a
SHA512

0aa675ebfa06192e43b99e956f30763e8f115382ca708f54a1a881ea3eb0ebba96e75832c20d61e8c9b08f4daff072c6ce2a061fca89441eedd1ed6c41d25730
SSDEEP

6144:u7EdBkyHD8QD3xEFBnmBoqpXeQS4lmjjYC5/h+4AGgeev+jpz3QsbyB/ax:RvoQdErOZe1Yq+LGpgql3QsIe

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

Executes dropped EXE 3 IoCs

pid	Process
460	winlogons.exe
4756	winlogons.exe
4932	csrss.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	Trojan-Ransom.Win32.Blocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	winlogons.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Winlogons = "C:\\Users\\Admin\\AppData\\Roaming\\winlogons.exe"	winlogons.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Winlogons = "C:\\Users\\Admin\\AppData\\Roaming\\winlogons.exe"	winlogons.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	winlogons.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 460 set thread context of 4756	460	winlogons.exe	81

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	winlogons.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4756	winlogons.exe
4756	winlogons.exe
4756	winlogons.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe
4932	csrss.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4756	winlogons.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4756	winlogons.exe
Token: SeDebugPrivilege	4932	csrss.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4896 wrote to memory of 460	4896	Trojan-Ransom.Win32.Blocker.exe	80
PID 4896 wrote to memory of 460	4896	Trojan-Ransom.Win32.Blocker.exe	80
PID 4896 wrote to memory of 460	4896	Trojan-Ransom.Win32.Blocker.exe	80
PID 460 wrote to memory of 4756	460	winlogons.exe	81
PID 460 wrote to memory of 4756	460	winlogons.exe	81
PID 460 wrote to memory of 4756	460	winlogons.exe	81
PID 460 wrote to memory of 4756	460	winlogons.exe	81
PID 460 wrote to memory of 4756	460	winlogons.exe	81
PID 460 wrote to memory of 4756	460	winlogons.exe	81
PID 460 wrote to memory of 4756	460	winlogons.exe	81
PID 460 wrote to memory of 4756	460	winlogons.exe	81
PID 460 wrote to memory of 4932	460	winlogons.exe	83
PID 460 wrote to memory of 4932	460	winlogons.exe	83
PID 460 wrote to memory of 4932	460	winlogons.exe	83

C:\Users\Admin\AppData\Local\Temp\Trojan-Ransom.Win32.Blocker.exe
"C:\Users\Admin\AppData\Local\Temp\Trojan-Ransom.Win32.Blocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4896
- C:\Users\Admin\AppData\Roaming\winlogons.exe
  "C:\Users\Admin\AppData\Roaming\winlogons.exe"
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:460
- - C:\Users\Admin\AppData\Roaming\winlogons.exe
    "C:\Users\Admin\AppData\Roaming\winlogons.exe"
    3⤵
    - Executes dropped EXE
    - Checks whether UAC is enabled
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    PID:4756
- - C:\Users\Admin\AppData\Roaming\csrss.exe
    "C:\Users\Admin\AppData\Roaming\csrss.exe" -proc 4756 C:\Users\Admin\AppData\Roaming\winlogons.exe
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4932

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\csrss.exe

Filesize
368KB

MD5
7d0216a56aa4e378e540a3219a7ddde2

SHA1
f542a482b42c7820e0794925a708c61b21a98be1

SHA256
37a91a2334a08559850a7c830a2bbb1ceb9f313c2ddc80ad2ea4704f90b0754a

SHA512
0aa675ebfa06192e43b99e956f30763e8f115382ca708f54a1a881ea3eb0ebba96e75832c20d61e8c9b08f4daff072c6ce2a061fca89441eedd1ed6c41d25730

Download Submit
C:\Users\Admin\AppData\Roaming\csrss.exe

Filesize
368KB

MD5
7d0216a56aa4e378e540a3219a7ddde2

SHA1
f542a482b42c7820e0794925a708c61b21a98be1

SHA256
37a91a2334a08559850a7c830a2bbb1ceb9f313c2ddc80ad2ea4704f90b0754a

SHA512
0aa675ebfa06192e43b99e956f30763e8f115382ca708f54a1a881ea3eb0ebba96e75832c20d61e8c9b08f4daff072c6ce2a061fca89441eedd1ed6c41d25730

Download Submit
C:\Users\Admin\AppData\Roaming\winlogons.exe

Filesize
368KB

MD5
7d0216a56aa4e378e540a3219a7ddde2

SHA1
f542a482b42c7820e0794925a708c61b21a98be1

SHA256
37a91a2334a08559850a7c830a2bbb1ceb9f313c2ddc80ad2ea4704f90b0754a

SHA512
0aa675ebfa06192e43b99e956f30763e8f115382ca708f54a1a881ea3eb0ebba96e75832c20d61e8c9b08f4daff072c6ce2a061fca89441eedd1ed6c41d25730

Download Submit
C:\Users\Admin\AppData\Roaming\winlogons.exe

Filesize
368KB

MD5
7d0216a56aa4e378e540a3219a7ddde2

SHA1
f542a482b42c7820e0794925a708c61b21a98be1

SHA256
37a91a2334a08559850a7c830a2bbb1ceb9f313c2ddc80ad2ea4704f90b0754a

SHA512
0aa675ebfa06192e43b99e956f30763e8f115382ca708f54a1a881ea3eb0ebba96e75832c20d61e8c9b08f4daff072c6ce2a061fca89441eedd1ed6c41d25730

Download Submit
C:\Users\Admin\AppData\Roaming\winlogons.exe

Filesize
368KB

MD5
7d0216a56aa4e378e540a3219a7ddde2

SHA1
f542a482b42c7820e0794925a708c61b21a98be1

SHA256
37a91a2334a08559850a7c830a2bbb1ceb9f313c2ddc80ad2ea4704f90b0754a

SHA512
0aa675ebfa06192e43b99e956f30763e8f115382ca708f54a1a881ea3eb0ebba96e75832c20d61e8c9b08f4daff072c6ce2a061fca89441eedd1ed6c41d25730

Download Submit
memory/460-148-0x0000000074C70000-0x0000000075221000-memory.dmp

Filesize
5.7MB

Download
memory/460-143-0x0000000074C70000-0x0000000075221000-memory.dmp

Filesize
5.7MB

Download
memory/460-133-0x0000000000000000-mapping.dmp

Download
memory/4756-137-0x0000000000000000-mapping.dmp

Download
memory/4756-139-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/4756-138-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/4756-140-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/4756-144-0x0000000074C70000-0x0000000075221000-memory.dmp

Filesize
5.7MB

Download
memory/4756-150-0x0000000074C70000-0x0000000075221000-memory.dmp

Filesize
5.7MB

Download
memory/4896-132-0x0000000074C70000-0x0000000075221000-memory.dmp

Filesize
5.7MB

Download
memory/4896-136-0x0000000074C70000-0x0000000075221000-memory.dmp

Filesize
5.7MB

Download
memory/4932-145-0x0000000000000000-mapping.dmp

Download
memory/4932-149-0x0000000074C70000-0x0000000075221000-memory.dmp

Filesize
5.7MB

Download
memory/4932-151-0x0000000074C70000-0x0000000075221000-memory.dmp

Filesize
5.7MB

Download