nanocore | 59930cbba4dd59a8e76a13ecc22429f1ec061c79f31a0f4e0ad4a7d9de1e486f

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe

Xmrig family
xmrig
Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm
xmrig
XMRig is a high performance, open source, cross platform CPU/GPU miner.
miner xmrig

XMRig Miner payload 11 IoCs

miner

resource	yara_rule
behavioral1/memory/1332-53-0x0000000140000000-0x0000000140835000-memory.dmp	xmrig
behavioral1/memory/1332-52-0x0000000140000000-0x0000000140835000-memory.dmp	xmrig
behavioral1/memory/1332-56-0x0000000140000000-0x0000000140835000-memory.dmp	xmrig
behavioral1/memory/1332-59-0x0000000140000000-0x0000000140835000-memory.dmp	xmrig
behavioral1/memory/1332-58-0x0000000140000000-0x0000000140835000-memory.dmp	xmrig
behavioral1/memory/1332-57-0x0000000140000000-0x0000000140835000-memory.dmp	xmrig
behavioral1/memory/1332-55-0x0000000140000000-0x0000000140835000-memory.dmp	xmrig
behavioral1/memory/1332-61-0x0000000140000000-0x0000000140835000-memory.dmp	xmrig
behavioral1/memory/1332-63-0x0000000140000000-0x0000000140835000-memory.dmp	xmrig
behavioral1/memory/1332-65-0x0000000140000000-0x0000000140835000-memory.dmp	xmrig
behavioral1/memory/1332-64-0x0000000140000000-0x0000000140835000-memory.dmp	xmrig

Creates new service(s) 2 TTPs
persistence execution

Windows Service
T1543.003

Service Execution
T1569.002
Stops running service(s) 4 TTPs
evasion execution

Windows Service
T1543.003

Impair Defenses
T1562

Service Stop
T1489

Service Execution
T1569.002

Checks BIOS information in registry 2 TTPs 1 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	winlogon.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\winlogon.exe	Builder.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\wanhost.exe	Builder.exe

Executes dropped EXE 5 IoCs

pid	Process
4500	winlogon.exe
2480	wanhost.exe
3852	system32.exe
2792	qshtkbttphgg.exe
4572	system32-checker.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\NAT Host = "C:\\Program Files (x86)\\NAT Host\\nathost.exe"	Builder.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

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

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
22	raw.githubusercontent.com
23	raw.githubusercontent.com

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
14	checkip.amazonaws.com
13	checkip.amazonaws.com

Power Settings 1 TTPs 8 IoCs

powercfg controls all configurable power system settings on a Windows system and can be abused to prevent an infected host from locking or shutting down.

persistence

Power Settings

T1653

pid	Process
2424	powercfg.exe
3684	powercfg.exe
4636	powercfg.exe
5096	powercfg.exe
4728	powercfg.exe
2560	powercfg.exe
2196	powercfg.exe
1212	powercfg.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2792 set thread context of 2832	2792	qshtkbttphgg.exe	117
PID 2792 set thread context of 1332	2792	qshtkbttphgg.exe	120

UPX packed file 16 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/1332-47-0x0000000140000000-0x0000000140835000-memory.dmp	upx
behavioral1/memory/1332-49-0x0000000140000000-0x0000000140835000-memory.dmp	upx
behavioral1/memory/1332-53-0x0000000140000000-0x0000000140835000-memory.dmp	upx
behavioral1/memory/1332-52-0x0000000140000000-0x0000000140835000-memory.dmp	upx
behavioral1/memory/1332-50-0x0000000140000000-0x0000000140835000-memory.dmp	upx
behavioral1/memory/1332-48-0x0000000140000000-0x0000000140835000-memory.dmp	upx
behavioral1/memory/1332-51-0x0000000140000000-0x0000000140835000-memory.dmp	upx
behavioral1/memory/1332-56-0x0000000140000000-0x0000000140835000-memory.dmp	upx
behavioral1/memory/1332-59-0x0000000140000000-0x0000000140835000-memory.dmp	upx
behavioral1/memory/1332-58-0x0000000140000000-0x0000000140835000-memory.dmp	upx
behavioral1/memory/1332-57-0x0000000140000000-0x0000000140835000-memory.dmp	upx
behavioral1/memory/1332-55-0x0000000140000000-0x0000000140835000-memory.dmp	upx
behavioral1/memory/1332-61-0x0000000140000000-0x0000000140835000-memory.dmp	upx
behavioral1/memory/1332-63-0x0000000140000000-0x0000000140835000-memory.dmp	upx
behavioral1/memory/1332-65-0x0000000140000000-0x0000000140835000-memory.dmp	upx
behavioral1/memory/1332-64-0x0000000140000000-0x0000000140835000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\NAT Host\nathost.exe	Builder.exe

Launches sc.exe 4 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
4308	sc.exe
4980	sc.exe
5036	sc.exe
4588	sc.exe

System Location Discovery: System Language Discovery 1 TTPs 7 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	Builder.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winlogon.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\MultifunctionAdapter\0\DiskController\0\DiskPeripheral\0	winlogon.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\MultifunctionAdapter\0\DiskController\0\DiskPeripheral\0\Identifier	winlogon.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

pid	Process
1568	reg.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

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

persistence execution

Scheduled Task

pid	Process
4368	schtasks.exe
4436	schtasks.exe
380	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
5016	Builder.exe
5016	Builder.exe
5016	Builder.exe
5016	Builder.exe
5016	Builder.exe
5016	Builder.exe
4500	winlogon.exe
4500	winlogon.exe
4500	winlogon.exe
3852	system32.exe
3852	system32.exe
3852	system32.exe
3852	system32.exe
3852	system32.exe
3852	system32.exe
3852	system32.exe
3852	system32.exe
2792	qshtkbttphgg.exe
2792	qshtkbttphgg.exe
2792	qshtkbttphgg.exe
2792	qshtkbttphgg.exe
2792	qshtkbttphgg.exe
2792	qshtkbttphgg.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
5016	Builder.exe
4500	winlogon.exe

Suspicious behavior: SetClipboardViewer 1 IoCs

pid	Process
4500	winlogon.exe

Suspicious use of AdjustPrivilegeToken 23 IoCs

description	pid	Process
Token: SeDebugPrivilege	5016	Builder.exe
Token: SeDebugPrivilege	4500	winlogon.exe
Token: SeDebugPrivilege	4500	winlogon.exe
Token: SeDebugPrivilege	2480	wanhost.exe
Token: SeDebugPrivilege	3852	system32.exe
Token: SeShutdownPrivilege	1212	powercfg.exe
Token: SeCreatePagefilePrivilege	1212	powercfg.exe
Token: SeShutdownPrivilege	2424	powercfg.exe
Token: SeCreatePagefilePrivilege	2424	powercfg.exe
Token: SeShutdownPrivilege	4636	powercfg.exe
Token: SeCreatePagefilePrivilege	4636	powercfg.exe
Token: SeShutdownPrivilege	3684	powercfg.exe
Token: SeCreatePagefilePrivilege	3684	powercfg.exe
Token: SeDebugPrivilege	2792	qshtkbttphgg.exe
Token: SeShutdownPrivilege	2560	powercfg.exe
Token: SeCreatePagefilePrivilege	2560	powercfg.exe
Token: SeShutdownPrivilege	4728	powercfg.exe
Token: SeCreatePagefilePrivilege	4728	powercfg.exe
Token: SeShutdownPrivilege	2196	powercfg.exe
Token: SeCreatePagefilePrivilege	2196	powercfg.exe
Token: SeShutdownPrivilege	5096	powercfg.exe
Token: SeCreatePagefilePrivilege	5096	powercfg.exe
Token: SeLockMemoryPrivilege	1332	explorer.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 5016 wrote to memory of 380	5016	Builder.exe	83
PID 5016 wrote to memory of 380	5016	Builder.exe	83
PID 5016 wrote to memory of 380	5016	Builder.exe	83
PID 5016 wrote to memory of 4368	5016	Builder.exe	85
PID 5016 wrote to memory of 4368	5016	Builder.exe	85
PID 5016 wrote to memory of 4368	5016	Builder.exe	85
PID 5016 wrote to memory of 4500	5016	Builder.exe	87
PID 5016 wrote to memory of 4500	5016	Builder.exe	87
PID 5016 wrote to memory of 4500	5016	Builder.exe	87
PID 5016 wrote to memory of 2480	5016	Builder.exe	88
PID 5016 wrote to memory of 2480	5016	Builder.exe	88
PID 5016 wrote to memory of 1568	5016	Builder.exe	89
PID 5016 wrote to memory of 1568	5016	Builder.exe	89
PID 5016 wrote to memory of 1568	5016	Builder.exe	89
PID 4500 wrote to memory of 4108	4500	winlogon.exe	91
PID 4500 wrote to memory of 4108	4500	winlogon.exe	91
PID 4500 wrote to memory of 4108	4500	winlogon.exe	91
PID 4500 wrote to memory of 4436	4500	winlogon.exe	93
PID 4500 wrote to memory of 4436	4500	winlogon.exe	93
PID 4500 wrote to memory of 4436	4500	winlogon.exe	93
PID 5016 wrote to memory of 3852	5016	Builder.exe	95
PID 5016 wrote to memory of 3852	5016	Builder.exe	95
PID 2792 wrote to memory of 2832	2792	qshtkbttphgg.exe	117
PID 2792 wrote to memory of 2832	2792	qshtkbttphgg.exe	117
PID 2792 wrote to memory of 2832	2792	qshtkbttphgg.exe	117
PID 2792 wrote to memory of 2832	2792	qshtkbttphgg.exe	117
PID 2792 wrote to memory of 2832	2792	qshtkbttphgg.exe	117
PID 2792 wrote to memory of 2832	2792	qshtkbttphgg.exe	117
PID 2792 wrote to memory of 2832	2792	qshtkbttphgg.exe	117
PID 2792 wrote to memory of 2832	2792	qshtkbttphgg.exe	117
PID 2792 wrote to memory of 2832	2792	qshtkbttphgg.exe	117
PID 2792 wrote to memory of 1332	2792	qshtkbttphgg.exe	120
PID 2792 wrote to memory of 1332	2792	qshtkbttphgg.exe	120
PID 2792 wrote to memory of 1332	2792	qshtkbttphgg.exe	120
PID 2792 wrote to memory of 1332	2792	qshtkbttphgg.exe	120
PID 2792 wrote to memory of 1332	2792	qshtkbttphgg.exe	120
PID 5016 wrote to memory of 4572	5016	Builder.exe	125
PID 5016 wrote to memory of 4572	5016	Builder.exe	125

C:\Users\Admin\AppData\Local\Temp\Builder.exe
"C:\Users\Admin\AppData\Local\Temp\Builder.exe"
1⤵
- Drops startup file
- 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:5016
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks.exe" /create /f /tn "NAT Host" /xml "C:\Users\Admin\AppData\Local\Temp\tmp8A4E.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:380
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks.exe" /create /f /tn "NAT Host Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp8A9D.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:4368
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\winlogon.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\winlogon.exe"
  2⤵
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Checks whether UAC is enabled
  - System Location Discovery: System Language Discovery
  - Enumerates system info in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious behavior: SetClipboardViewer
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4500
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /delete /f /tn "Microsoft\Windows\Client Server Runtime Process"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4108
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "Microsoft\Windows\Client Server Runtime Process" /xml "C:\Users\Admin\AppData\Local\Temp\tmp9451.tmp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4436
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\wanhost.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\wanhost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2480
- C:\Windows\SysWOW64\reg.exe
  "reg.exe" ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
  2⤵
  - UAC bypass
  - System Location Discovery: System Language Discovery
  - Modifies registry key
  PID:1568
- C:\Users\Admin\AppData\Local\system32.exe
  "C:\Users\Admin\AppData\Local\system32.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3852
- - C:\Windows\system32\powercfg.exe
    C:\Windows\system32\powercfg.exe /x -hibernate-timeout-ac 0
    3⤵
    - Power Settings
    - Suspicious use of AdjustPrivilegeToken
    PID:1212
- - C:\Windows\system32\powercfg.exe
    C:\Windows\system32\powercfg.exe /x -hibernate-timeout-dc 0
    3⤵
    - Power Settings
    - Suspicious use of AdjustPrivilegeToken
    PID:4636
- - C:\Windows\system32\powercfg.exe
    C:\Windows\system32\powercfg.exe /x -standby-timeout-ac 0
    3⤵
    - Power Settings
    - Suspicious use of AdjustPrivilegeToken
    PID:3684
- - C:\Windows\system32\powercfg.exe
    C:\Windows\system32\powercfg.exe /x -standby-timeout-dc 0
    3⤵
    - Power Settings
    - Suspicious use of AdjustPrivilegeToken
    PID:2424
- - C:\Windows\system32\sc.exe
    C:\Windows\system32\sc.exe delete "AHMOQNZH"
    3⤵
    - Launches sc.exe
    PID:4308
- - C:\Windows\system32\sc.exe
    C:\Windows\system32\sc.exe create "AHMOQNZH" binpath= "C:\ProgramData\ipbodjvyupmv\qshtkbttphgg.exe" start= "auto"
    3⤵
    - Launches sc.exe
    PID:4980
- - C:\Windows\system32\sc.exe
    C:\Windows\system32\sc.exe stop eventlog
    3⤵
    - Launches sc.exe
    PID:5036
- - C:\Windows\system32\sc.exe
    C:\Windows\system32\sc.exe start "AHMOQNZH"
    3⤵
    - Launches sc.exe
    PID:4588
- C:\Users\Admin\AppData\Local\system32-checker.exe
  "C:\Users\Admin\AppData\Local\system32-checker.exe"
  2⤵
  - Executes dropped EXE
  PID:4572

C:\ProgramData\ipbodjvyupmv\qshtkbttphgg.exe
C:\ProgramData\ipbodjvyupmv\qshtkbttphgg.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2792
- C:\Windows\system32\powercfg.exe
  C:\Windows\system32\powercfg.exe /x -hibernate-timeout-ac 0
  2⤵
  - Power Settings
  - Suspicious use of AdjustPrivilegeToken
  PID:2196
- C:\Windows\system32\powercfg.exe
  C:\Windows\system32\powercfg.exe /x -hibernate-timeout-dc 0
  2⤵
  - Power Settings
  - Suspicious use of AdjustPrivilegeToken
  PID:2560
- C:\Windows\system32\powercfg.exe
  C:\Windows\system32\powercfg.exe /x -standby-timeout-ac 0
  2⤵
  - Power Settings
  - Suspicious use of AdjustPrivilegeToken
  PID:4728
- C:\Windows\system32\powercfg.exe
  C:\Windows\system32\powercfg.exe /x -standby-timeout-dc 0
  2⤵
  - Power Settings
  - Suspicious use of AdjustPrivilegeToken
  PID:5096
- C:\Windows\system32\conhost.exe
  C:\Windows\system32\conhost.exe
  2⤵
  PID:2832
- C:\Windows\explorer.exe
  explorer.exe
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1332

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Power Settings

T1653

Scheduled Task/Job

T1053

Scheduled Task

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Scheduled Task/Job

T1053

Scheduled Task

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

Credential Access

Discovery

Query Registry

T1012

System Information Discovery