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
behavioral3/memory/5296-0-0x0000018C4F320000-0x0000018C4F334000-memory.dmp	family_sheetrat_v1
behavioral3/files/0x002100000002b2ea-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

Executes dropped EXE 4 IoCs

pid	Process
4056	Service.exe
3680	Bluetooth.exe
5572	Service.exe
5440	Service.exe

Looks up external IP address via web service 7 IoCs

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

flow	ioc
3	api.ipify.org
6	icanhazip.com
7	api.ipify.org
12	api.ipify.org
1	api.ipify.org
1	icanhazip.com
2	api.ipify.org

Drops file in Program Files directory 6 IoCs

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

Drops file in Windows directory 6 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
File opened for modification	C:\Windows\Bluetooth.exe	Service.exe
File opened for modification	C:\Windows\Bluetooth.exe	Service.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
5240	schtasks.exe
4616	schtasks.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	5296	cwp47cnctcad2l0t.exe
Token: SeDebugPrivilege	4056	Service.exe
Token: SeDebugPrivilege	3680	Bluetooth.exe
Token: SeIncBasePriorityPrivilege	4056	Service.exe
Token: SeDebugPrivilege	5572	Service.exe
Token: SeDebugPrivilege	5440	Service.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5296 wrote to memory of 5068	5296	cwp47cnctcad2l0t.exe	83
PID 5296 wrote to memory of 1416	5296	cwp47cnctcad2l0t.exe	84
PID 1416 wrote to memory of 5240	1416	cmd.exe	87
PID 5296 wrote to memory of 548	5296	cwp47cnctcad2l0t.exe	88
PID 548 wrote to memory of 4616	548	cmd.exe	90
PID 5296 wrote to memory of 4056	5296	cwp47cnctcad2l0t.exe	91

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
- Drops file in Program Files directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5296
- 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:5068
- 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:1416
- - 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:5240
- 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:548
- - 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:4616
- 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:4056

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:3680

C:\Program Files\Service.exe
"C:\Program Files\Service.exe"
1⤵
- Executes dropped EXE
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:5572

C:\Program Files\Service.exe
"C:\Program Files\Service.exe"
1⤵
- Executes dropped EXE
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:5440

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

1

T1012

System Information Discovery

1

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

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Service.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Service.exe.log
Size 1KB
SHA256 8b410de677f095f88c42c69c716a9383b94ceb86ca90666188fcd4f4df7fc9fa
MD5 5dd6ecdc4507cc0f897cded9ebeb94b4
SHA1 afd42365a5a8fa71f506a3d34960f8ed459cfd86
SHA512 078e5c9b8062420ef2c3a3a816961e957b0daa7f7a2ecd92689d0399febda98a0c727d1cd9b286adce1c132b9efbd383179867cc494831d4679d9e3805d51a06
TLSH
T14011AB722371B1D489163F43295C568827FF4319B550EE0CBAA8B21ED82B41B6F322F3
MD5 SHA1 SHA512 TLSH

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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