sheetrat | 8b75a5f87e2421ff44b5e10386729dd4aa09d22e0501fe9e9a140a45c94ee41d

General

Target
cwp47cnctcad2l0t.exe
Size 61KB
Sample260710-w8d7sahx21
SHA256 8b75a5f87e2421ff44b5e10386729dd4aa09d22e0501fe9e9a140a45c94ee41d
MD5 5a6a9d52741d9369f84c883d9a035ac0
SHA1 ea152dbf0f35925584315c4205836072011fa9e3
SHA512 c44f320e123a6646ee1bf1e76182c824b20ae66bbaf7479e327161be1d4969b1fc95d4c45f548fe3cfb637e5ddd4739f6907ee8b71c4109cecaa3b2a70063421
SSDEEP 1536:Gk3zKZfx0B8tKlvVvzAzywhSObnNd/Lpx7QIrNAOM3hMT:GkIfx0+tCvZlESObnNd/Lpx7lyQT
TLSH
T133535D053790AA11D9BF55BAC2D373A09734C3436942D70F1ECB90CA2F567D98E1ACEA
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

execution sheetrat persistence trojan

Malware Config

Extracted

Family

sheetrat

Attributes

anti_virtual
false
certificate
i37xid3nohi4
exclusion_wd
true
hidden_file
true
key
mtwkip2jk
path_client
%ProgramFiles%\Service.exe
path_watch_dog
%Windows%\Bluetooth.exe
pump
false
rootkit
false
task_client
ShellHost
task_watch_dog
Wifi service
use_install_admin
true
user_init
true

Signatures

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

Detects Sheetrat Payload 2 IoCs

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

resource	yara_rule
behavioral1/memory/3840-0-0x0000027BC58F0000-0x0000027BC5904000-memory.dmp	family_sheetrat_v1
behavioral1/files/0x0018000000028352-6.dat	family_sheetrat_v1

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\System32\\userinit.exe,C:\\Program Files\\Service.exe"	cwp47cnctcad2l0t.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-2058276091-3280583803-376660292-1000\Control Panel\International\Geo\Nation	cwp47cnctcad2l0t.exe

Executes dropped EXE 2 IoCs

pid	Process
2536	Service.exe
1776	Bluetooth.exe

Looks up external IP address via web service 4 IoCs

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

flow	ioc
5	api.ipify.org
6	api.ipify.org
7	api.ipify.org
9	api.ipify.org

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files\Service.exe	cwp47cnctcad2l0t.exe
File opened for modification	C:\Program Files\Service.exe	cwp47cnctcad2l0t.exe
File opened for modification	C:\Program Files\Service.exe	Service.exe
File opened for modification	C:\Program Files\Service.exe	Bluetooth.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\Bluetooth.exe	cwp47cnctcad2l0t.exe
File opened for modification	C:\Windows\Bluetooth.exe	cwp47cnctcad2l0t.exe
File opened for modification	C:\Windows\Bluetooth.exe	Service.exe
File opened for modification	C:\Windows\Bluetooth.exe	Bluetooth.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	cwp47cnctcad2l0t.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
3400	schtasks.exe
4696	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3840	cwp47cnctcad2l0t.exe
Token: SeDebugPrivilege	2536	Service.exe
Token: SeDebugPrivilege	1776	Bluetooth.exe
Token: SeIncBasePriorityPrivilege	2536	Service.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3840 wrote to memory of 3204	3840	cwp47cnctcad2l0t.exe	84
PID 3840 wrote to memory of 1696	3840	cwp47cnctcad2l0t.exe	85
PID 1696 wrote to memory of 4696	1696	cmd.exe	88
PID 3840 wrote to memory of 4032	3840	cwp47cnctcad2l0t.exe	89
PID 4032 wrote to memory of 3400	4032	cmd.exe	91
PID 3840 wrote to memory of 2536	3840	cwp47cnctcad2l0t.exe	92

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\cwp47cnctcad2l0t.exe
"C:\Users\Admin\AppData\Local\Temp\cwp47cnctcad2l0t.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Drops file in Program Files directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3840
- C:\Windows\SYSTEM32\CMD.exe
  "CMD" netsh advfirewall firewall add rule name=""P@'4<Sq4@a#4J" dir=in action=allow program="C:\Program Files\Service.exe" enable=yes & exit
  2⤵
  PID:3204
- C:\Windows\SYSTEM32\cmd.exe
  "cmd" /c schtasks /create /f /sc minute /mo 1 /tn "ShellHost" /tr "C:\Program Files\Service.exe" /RL HIGHEST & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1696
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc minute /mo 1 /tn "ShellHost" /tr "C:\Program Files\Service.exe" /RL HIGHEST
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4696
- C:\Windows\SYSTEM32\cmd.exe
  "cmd" /c schtasks /create /f /sc minute /mo 30 /tn "Wifi service" /tr "C:\Windows\Bluetooth.exe" /RL HIGHEST & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4032
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc minute /mo 30 /tn "Wifi service" /tr "C:\Windows\Bluetooth.exe" /RL HIGHEST
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3400
- C:\Program Files\Service.exe
  "C:\Program Files\Service.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in Program Files directory
  - Drops file in Windows directory
  - Suspicious use of AdjustPrivilegeToken
  PID:2536

C:\Windows\Bluetooth.exe
C:\Windows\Bluetooth.exe
1⤵
- Executes dropped EXE
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:1776

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Winlogon Helper DLL

1

T1547.004

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Winlogon Helper DLL

1

T1547.004

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

Service.exe

Path C:\Program Files\Service.exe
Size 61KB
SHA256 8b75a5f87e2421ff44b5e10386729dd4aa09d22e0501fe9e9a140a45c94ee41d
MD5 5a6a9d52741d9369f84c883d9a035ac0
SHA1 ea152dbf0f35925584315c4205836072011fa9e3
SHA512 c44f320e123a6646ee1bf1e76182c824b20ae66bbaf7479e327161be1d4969b1fc95d4c45f548fe3cfb637e5ddd4739f6907ee8b71c4109cecaa3b2a70063421
SSDEEP 1536:Gk3zKZfx0B8tKlvVvzAzywhSObnNd/Lpx7QIrNAOM3hMT:GkIfx0+tCvZlESObnNd/Lpx7lyQT
TLSH
T133535D053790AA11D9BF55BAC2D373A09734C3436942D70F1ECB90CA2F567D98E1ACEA
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3840-0-0x0000027BC58F0000-0x0000027BC5904000-memory.dmp

Download

memory/3840-1-0x0000027BC7520000-0x0000027BC7530000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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