sheetrat | 5217cc3a7af92aa9603b4e7ce97ac5467d5ac7697a448f0ef95c6abebf1d503b

General

Target
ao1bcjfdy2whv796.exe
Size 48KB
Sample260512-2qlrssh12v
SHA256 5217cc3a7af92aa9603b4e7ce97ac5467d5ac7697a448f0ef95c6abebf1d503b
MD5 aaeb65447bc9f0f4c91bc0da8eea8a4f
SHA1 0d27e2712d6b13da07f4f01d274f4c6523b087d7
SHA512 4c96df2b0d2eedfa4f1787824f317055c219224fe57db0dd11ed2f983221a4306839ee73c749d2d488feb821171a1faf20945a9e5aa3a1532422bfd430b390a6
SSDEEP 768:WqijC1xx4dmfkj9BkxT0/EUwYi1/dNDH0j4FaonhXHObdPfwLkO/nbX1yi5:V4C1Fkj9BkuiF70j4HNOb14LZhyI
TLSH
T1AB233A0477CD9A50D4FF47B9981392149378D1278A17EB0F2DCA50FA2B123D9C64AEF6
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

1 execution sheetrat persistence trojan

Malware Config

Extracted

Family

sheetrat

Version

1.8

Campaign

1

C2

tcp.cloudpub.ru:45458

Mutex

G23cCUR7cVmpEsPS

Attributes

anti_virtual
false
certificate
p1sz32e1ijfo2smm6tjr7t9gprmq
exclusion_wd
true
hidden_file
false
install
true
install_watch_dog
true
key
4jzu5k00mv11bzm1p9h3
path_client
%Windows%\WinDefender.exe
path_watch_dog
%Windows%\schost.exe
pump
true
rootkit
false
task_client
Microsoft\Windows\WAppCrashNvTew
task_watch_dog
Microsoft\MachineCore
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 1 IoCs

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

resource	yara_rule
behavioral2/memory/1960-0-0x000001BB1E440000-0x000001BB1E452000-memory.dmp	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:\\Windows\\WinDefender.exe"	ao1bcjfdy2whv796.exe

Executes dropped EXE 5 IoCs

pid	Process
3816	WinDefender.exe
3548	WinDefender.exe
5464	schost.exe
1032	WinDefender.exe
4724	WinDefender.exe

Looks up external IP address via web service 9 IoCs

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

flow	ioc
6	api.ipify.org
12	icanhazip.com
1	api.ipify.org
1	icanhazip.com
11	icanhazip.com
18	api.ipify.org
43	api.ipify.org
1	ipinfo.io
1	checkip.amazonaws.com

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\WinDefender.exe	ao1bcjfdy2whv796.exe
File created	C:\Windows\schost.exe	ao1bcjfdy2whv796.exe

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
5448	schtasks.exe
800	schtasks.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	1960	ao1bcjfdy2whv796.exe
Token: SeDebugPrivilege	3816	WinDefender.exe
Token: SeDebugPrivilege	5464	schost.exe
Token: SeDebugPrivilege	3548	WinDefender.exe
Token: SeIncBasePriorityPrivilege	3816	WinDefender.exe
Token: SeDebugPrivilege	1032	WinDefender.exe
Token: SeDebugPrivilege	4724	WinDefender.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1960 wrote to memory of 3944	1960	ao1bcjfdy2whv796.exe	81
PID 1960 wrote to memory of 3260	1960	ao1bcjfdy2whv796.exe	82
PID 1960 wrote to memory of 1796	1960	ao1bcjfdy2whv796.exe	85
PID 3260 wrote to memory of 5448	3260	cmd.exe	87
PID 1796 wrote to memory of 800	1796	cmd.exe	88
PID 1960 wrote to memory of 3816	1960	ao1bcjfdy2whv796.exe	89

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\ao1bcjfdy2whv796.exe
"C:\Users\Admin\AppData\Local\Temp\ao1bcjfdy2whv796.exe"
1⤵
- Modifies WinLogon for persistence
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1960
- C:\Windows\SYSTEM32\CMD.exe
  "CMD" netsh advfirewall firewall add rule name="ein9Z',>Zn#CZP" dir=in action=allow program="C:\Windows\WinDefender.exe" enable=yes & exit
  2⤵
  PID:3944
- C:\Windows\SYSTEM32\cmd.exe
  "cmd" /c schtasks /create /f /sc minute /mo 1 /tn "Microsoft\Windows\WAppCrashNvTew" /tr "C:\Windows\WinDefender.exe" /RL HIGHEST & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3260
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc minute /mo 1 /tn "Microsoft\Windows\WAppCrashNvTew" /tr "C:\Windows\WinDefender.exe" /RL HIGHEST
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:5448
- C:\Windows\SYSTEM32\cmd.exe
  "cmd" /c schtasks /create /f /sc minute /mo 30 /tn "Microsoft\MachineCore" /tr "C:\Windows\schost.exe" /RL HIGHEST & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1796
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc minute /mo 30 /tn "Microsoft\MachineCore" /tr "C:\Windows\schost.exe" /RL HIGHEST
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:800
- C:\Windows\WinDefender.exe
  "C:\Windows\WinDefender.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:3816

C:\Windows\WinDefender.exe
C:\Windows\WinDefender.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3548

C:\Windows\schost.exe
C:\Windows\schost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5464

C:\Windows\WinDefender.exe
C:\Windows\WinDefender.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1032

C:\Windows\WinDefender.exe
C:\Windows\WinDefender.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4724

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

WinDefender.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\WinDefender.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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Downloads