nanocore | 1b0f0f68bba4c25b14187378bebf8db9dce85ec634e7375b53a287ad2dc12ea2

Analysis

max time kernel
88s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
27/01/2024, 20:32

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General

Target
tmp.exe
Size 210KB
Sample240127-zbk6lsddbp
SHA256 1b0f0f68bba4c25b14187378bebf8db9dce85ec634e7375b53a287ad2dc12ea2
MD5 f598543eb3fca36826b95c8934c18440
SHA1 d01513a81db37519eaae0faa8e54ee194d73103c
SHA512 dd971a469879b3c2b7c8b8f2edeca47ef9a0f6f12e788f3a3958f924b7f7442372ec8392e057489f32f12d35c456a8888e677d1995c0f1f68fd1272ed97dfe5a
SSDEEP 6144:gLV6Bta6dtJmakIM5c/C++adghMiGFajp8:gLV6Btpmk7/Csdghbsn
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"	tmp.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	tmp.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\SMTP Subsystem\smtpss.exe	tmp.exe
File opened for modification	C:\Program Files (x86)\SMTP Subsystem\smtpss.exe	tmp.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
2792	schtasks.exe
1360	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3056	tmp.exe
3056	tmp.exe
3056	tmp.exe
3056	tmp.exe
3056	tmp.exe
3056	tmp.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3056	tmp.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3056	tmp.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3056 wrote to memory of 2792	3056	tmp.exe	88
PID 3056 wrote to memory of 2792	3056	tmp.exe	88
PID 3056 wrote to memory of 2792	3056	tmp.exe	88
PID 3056 wrote to memory of 1360	3056	tmp.exe	91
PID 3056 wrote to memory of 1360	3056	tmp.exe	91
PID 3056 wrote to memory of 1360	3056	tmp.exe	91

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.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:3056
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks.exe" /create /f /tn "SMTP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp41FA.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:2792
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks.exe" /create /f /tn "SMTP Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp4259.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1360

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

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Downloads

tmp41FA.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmp41FA.tmp
Size 1KB
SHA256 b8475eb97200b8a15eaf07e0a2cddc5c95e5bc3e7a98685364c9796480de57dc
MD5 3f4dcafa44c36f23e4db2b2315fd09da
SHA1 8c83089d6f6c887a77af9b42ca09969f3b2f83f6
SHA512 e0624dd6cf0d5e014e96a323d2f7ebe13b683af71bd6ddafa3005cdc2f3c764cfca509262d442fc844b4b390d241ccf3eb36d30043d3d6f6e955a2ee9f792678
MD5 SHA1 SHA512

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tmp4259.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmp4259.tmp
Size 1KB
SHA256 3d568a47a8944a47f4aed6982755ac7ff7dda469cc1c81c213ecaa5d89de1f83
MD5 0339b45ef206f4becc88be0d65e24b9e
SHA1 6503a1851f4ccd8c80a31f96bd7ae40d962c9fad
SHA512 c98f4513db34d50510dd986e0d812545c442bd5bef26932032b165759627fab4e00c95fe907ab3416a8a1042bfa77aa516c479f1ff7d1ec2f21ae66df8f72551
MD5 SHA1 SHA512

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memory/3056-0-0x0000000074DD0000-0x0000000075381000-memory.dmp

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memory/3056-1-0x0000000074DD0000-0x0000000075381000-memory.dmp

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memory/3056-2-0x00000000015D0000-0x00000000015E0000-memory.dmp

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memory/3056-10-0x00000000015D0000-0x00000000015E0000-memory.dmp

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memory/3056-19-0x0000000074DD0000-0x0000000075381000-memory.dmp

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memory/3056-20-0x0000000074DD0000-0x0000000075381000-memory.dmp

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memory/3056-21-0x00000000015D0000-0x00000000015E0000-memory.dmp

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memory/3056-22-0x00000000015D0000-0x00000000015E0000-memory.dmp

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