sheetrat | bc71144144d2912e603ac484065cf8203ce0ab2ab511b0cfe88bb67c68ecd715

General

Target
uc3z3zgr96e9lb0g.exe
Size 4.5MB
Sample260625-we54eady5x
SHA256 bc71144144d2912e603ac484065cf8203ce0ab2ab511b0cfe88bb67c68ecd715
MD5 a2d10c43a4e33e2c8b79d57dea566777
SHA1 e331addcd3453cb9996ec8d7c3be36e5eba31583
SHA512 02b6c009d38228bad8c3c8b10c1a8188e15f8d3f0c645a11679e5cf7aefce9a14832e521c47a1f60c8b0954e55ba9c545a1bd008e986a4e1289b33a31fa34059
SSDEEP 12288:6xF4a7dNOumrjU5/nR/4cz7MibbDK9VED:
TLSH
T1B426236319FBEE1CC329C6B00743D5F1867B51A6A8E74F2ABF2417394402E525EC069F
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion evasion execution sheetrat persistence trojan

Malware Config

Signatures

Family: Sheetrat, NonEuclid rat
Sheetrat aka NonEuclid RAT is a trojan written in C#.
trojan sheetrat

Detects Sheetrat Payload 1 IoCs

Sheetrat aka NonEuclid RAT is a trojan written in C#.

resource	yara_rule
behavioral2/memory/4256-5-0x000000001BFD0000-0x000000001C032000-memory.dmp	family_sheetrat_v1

Modifies Windows Defender DisableAntiSpyware settings 3 TTPs 3 IoCs

evasion trojan

Modify Registry

T1112

Windows Service

T1543.003

Disable or Modify Tools

T1562.001

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\DisableAntiSpyware = "1"	uc3z3zgr96e9lb0g.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\DisableAntiSpyware = "1"	12.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\DisableAntiSpyware = "1"	12.exe

UAC bypass 3 TTPs 12 IoCs

defense_evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	12.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorUser = "0"	12.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	12.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorUser = "0"	12.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	uc3z3zgr96e9lb0g.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	uc3z3zgr96e9lb0g.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorUser = "0"	uc3z3zgr96e9lb0g.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	uc3z3zgr96e9lb0g.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	12.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	12.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	12.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	12.exe

Executes dropped EXE 2 IoCs

pid	Process
6192	12.exe
5464	12.exe

Checks whether UAC is enabled 1 TTPs 6 IoCs

defense_evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	uc3z3zgr96e9lb0g.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	uc3z3zgr96e9lb0g.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	12.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	12.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	12.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	12.exe

Looks up external IP address via web service 1 IoCs

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

flow	ioc
1	ip-api.com

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

System Information Discovery
T1082

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
4592	schtasks.exe
6968	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	4256	uc3z3zgr96e9lb0g.exe
Token: SeDebugPrivilege	5464	12.exe
Token: SeDebugPrivilege	6192	12.exe
Token: SeIncBasePriorityPrivilege	6192	12.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4256 wrote to memory of 6292	4256	uc3z3zgr96e9lb0g.exe	91
PID 4256 wrote to memory of 2792	4256	uc3z3zgr96e9lb0g.exe	92
PID 4256 wrote to memory of 6928	4256	uc3z3zgr96e9lb0g.exe	93
PID 6928 wrote to memory of 4592	6928	cmd.exe	97
PID 2792 wrote to memory of 3772	2792	CMD.exe	98
PID 4256 wrote to memory of 5464	4256	uc3z3zgr96e9lb0g.exe	101
PID 6192 wrote to memory of 5344	6192	12.exe	102
PID 6192 wrote to memory of 1132	6192	12.exe	103
PID 5344 wrote to memory of 5004	5344	CMD.exe	106
PID 1132 wrote to memory of 6968	1132	cmd.exe	107

System policy modification 1 TTPs 18 IoCs

defense_evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableUIADesktopToggle = "1"	uc3z3zgr96e9lb0g.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\FilterAdministratorToken = "0"	12.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableUIADesktopToggle = "1"	12.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	uc3z3zgr96e9lb0g.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	12.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\FilterAdministratorToken = "0"	12.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorUser = "0"	uc3z3zgr96e9lb0g.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	uc3z3zgr96e9lb0g.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	12.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableUIADesktopToggle = "1"	12.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	12.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	12.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	uc3z3zgr96e9lb0g.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\FilterAdministratorToken = "0"	uc3z3zgr96e9lb0g.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	12.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorUser = "0"	12.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	12.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorUser = "0"	12.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\uc3z3zgr96e9lb0g.exe
"C:\Users\Admin\AppData\Local\Temp\uc3z3zgr96e9lb0g.exe"
1⤵
- Modifies Windows Defender DisableAntiSpyware settings
- UAC bypass
- Checks whether UAC is enabled
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:4256
- C:\Windows\SYSTEM32\CMD.exe
  "CMD" netsh advfirewall firewall add rule name="WindowsControl" dir=in action=allow program="C:\Users\Admin\AppData\Roaming\12.exe" enable=yes & exit
  2⤵
  PID:6292
- C:\Windows\SYSTEM32\CMD.exe
  "CMD" /c schtasks /delete /F /TN "12" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2792
- - C:\Windows\system32\schtasks.exe
    schtasks /delete /F /TN "12"
    3⤵
    PID:3772
- C:\Windows\SYSTEM32\cmd.exe
  "cmd" /c schtasks /create /f /sc onlogon /tn "12" /tr "C:\Users\Admin\AppData\Roaming\12.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:6928
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /tn "12" /tr "C:\Users\Admin\AppData\Roaming\12.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4592
- C:\Users\Admin\AppData\Roaming\12.exe
  "C:\Users\Admin\AppData\Roaming\12.exe"
  2⤵
  - Modifies Windows Defender DisableAntiSpyware settings
  - UAC bypass
  - Executes dropped EXE
  - Checks whether UAC is enabled
  - Suspicious use of AdjustPrivilegeToken
  - System policy modification
  PID:5464

C:\Users\Admin\AppData\Roaming\12.exe
C:\Users\Admin\AppData\Roaming\12.exe
1⤵
- Modifies Windows Defender DisableAntiSpyware settings
- UAC bypass
- Executes dropped EXE
- Checks whether UAC is enabled
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:6192
- C:\Windows\System32\CMD.exe
  "CMD" /c schtasks /delete /F /TN "12" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5344
- - C:\Windows\System32\schtasks.exe
    schtasks /delete /F /TN "12"
    3⤵
    PID:5004
- C:\Windows\System32\cmd.exe
  "cmd" /c schtasks /create /f /sc onlogon /tn "12" /tr "C:\Users\Admin\AppData\Roaming\12.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1132
- - C:\Windows\System32\schtasks.exe
    schtasks /create /f /sc onlogon /tn "12" /tr "C:\Users\Admin\AppData\Roaming\12.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:6968

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Impair Defenses

2

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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12.exe

Path C:\ProgramData\12.exe
Size 4.5MB
SHA256 bc71144144d2912e603ac484065cf8203ce0ab2ab511b0cfe88bb67c68ecd715
MD5 a2d10c43a4e33e2c8b79d57dea566777
SHA1 e331addcd3453cb9996ec8d7c3be36e5eba31583
SHA512 02b6c009d38228bad8c3c8b10c1a8188e15f8d3f0c645a11679e5cf7aefce9a14832e521c47a1f60c8b0954e55ba9c545a1bd008e986a4e1289b33a31fa34059
SSDEEP 12288:6xF4a7dNOumrjU5/nR/4cz7MibbDK9VED:
TLSH
T1B426236319FBEE1CC329C6B00743D5F1867B51A6A8E74F2ABF2417394402E525EC069F
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/4256-0-0x0000000000F90000-0x0000000001416000-memory.dmp

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memory/4256-1-0x00007FF94984F000-0x00007FF949850000-memory.dmp

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memory/4256-2-0x00007FF9496C0000-0x00007FF94A064000-memory.dmp

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memory/4256-3-0x00007FF9496C0000-0x00007FF94A064000-memory.dmp

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memory/4256-4-0x00007FF9496C0000-0x00007FF94A064000-memory.dmp

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memory/4256-5-0x000000001BFD0000-0x000000001C032000-memory.dmp

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memory/4256-6-0x00007FF9496C0000-0x00007FF94A064000-memory.dmp

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memory/4256-37-0x00007FF9496C0000-0x00007FF94A064000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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