sheetrat | 01233eb0c9147ced09f97e45f506214a9567b67341b0bacee7df8c18dffaaf60

General

Target
111.exe
Size 479KB
Sample260818-tycj4aware
SHA256 01233eb0c9147ced09f97e45f506214a9567b67341b0bacee7df8c18dffaaf60
MD5 14de0f6765fbf2a64326a272ebd332c2
SHA1 74ff610d623d27f63694e4daf7f1d0423e0a25f7
SHA512 c03a42120e6d6ff11a23b2680844b42086aee617db144126301738af2f508800bdd222ddc892e4744607f2519b01c97eebf7eec396b53c89b0ac9909c9514c5b
SSDEEP 12288:UqLvF4DjHEX5w71RQ44BfBC583KkqBjOVV:yXkJI1RkW5AqxO
TLSH
T12DA42A257FA58E00D485183ECA7E3A49CB26E0F125026347370AF7A25D459EEDE2D3DB
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

execution sheetrat persistence privilege_escalation trojan

Malware Config

Extracted

Family

sheetrat

Version

1.8

C2

ggg.cantdown.su:4789

Signatures

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

Detects Sheetrat obfuscated V1.8 and higher 1 IoCs

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

resource	yara_rule
behavioral2/memory/3896-0-0x0000000000590000-0x000000000060E000-memory.dmp	family_sheetrat_v4

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:\\Users\\Admin\\xdwdiscord.exe"	111.exe

Event Triggered Execution: AppInit DLLs 1 TTPs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
persistence privilege_escalation

AppInit DLLs
T1546.010

Executes dropped EXE 6 IoCs

pid	Process
3396	xdwdiscord.exe
1252	xdwdiscord.exe
2620	xdwdiscord.exe
4284	xdwdiscord.exe
2504	xdwdiscord.exe
4956	xdwdiscord.exe

Loads dropped DLL 10 IoCs

pid	Process
416	Process not Found
1056	Process not Found
3396	xdwdiscord.exe
1252	xdwdiscord.exe
2620	xdwdiscord.exe
4284	xdwdiscord.exe
2504	xdwdiscord.exe
1244	Process not Found
6028	Process not Found
4956	xdwdiscord.exe

Drops file in Program Files directory 8 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\xdwdtesting.exe	111.exe
File opened for modification	C:\Program Files\xdwdtesting.exe	xdwdiscord.exe
File opened for modification	C:\Program Files\xdwdtesting.exe	xdwdiscord.exe
File opened for modification	C:\Program Files\xdwdtesting.exe	xdwdiscord.exe
File created	C:\Program Files\xdwdtesting.exe	111.exe
File opened for modification	C:\Program Files\xdwdtesting.exe	xdwdiscord.exe
File opened for modification	C:\Program Files\xdwdtesting.exe	xdwdiscord.exe
File opened for modification	C:\Program Files\xdwdtesting.exe	xdwdiscord.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\xdwd.dll	111.exe
File opened for modification	C:\Windows\xdwd.dll	111.exe

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

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
1964	cmd.exe
4512	cmd.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
3300	schtasks.exe
3424	schtasks.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	3896	111.exe
Token: SeDebugPrivilege	3396	xdwdiscord.exe
Token: SeDebugPrivilege	1252	xdwdiscord.exe
Token: SeIncBasePriorityPrivilege	3396	xdwdiscord.exe
Token: SeDebugPrivilege	2620	xdwdiscord.exe
Token: SeDebugPrivilege	4284	xdwdiscord.exe
Token: SeDebugPrivilege	2504	xdwdiscord.exe
Token: SeDebugPrivilege	4956	xdwdiscord.exe
Token: SeIncBasePriorityPrivilege	4956	xdwdiscord.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3896 wrote to memory of 2776	3896	111.exe	91
PID 3896 wrote to memory of 1964	3896	111.exe	92
PID 1964 wrote to memory of 3300	1964	cmd.exe	95
PID 3896 wrote to memory of 4512	3896	111.exe	96
PID 4512 wrote to memory of 3424	4512	cmd.exe	98
PID 3896 wrote to memory of 2620	3896	111.exe	103

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\111.exe
"C:\Users\Admin\AppData\Local\Temp\111.exe"
1⤵
- Modifies WinLogon for persistence
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3896
- C:\Windows\SYSTEM32\CMD.exe
  "CMD" netsh advfirewall firewall add rule name="=IY.QqK6QYe`Q?" dir=in action=allow program="C:\Users\Admin\xdwdiscord.exe" enable=yes & exit
  2⤵
  PID:2776
- C:\Windows\SYSTEM32\cmd.exe
  "cmd" /c schtasks /create /f /sc minute /mo 1 /tn "Chrome.exe" /tr "C:\Users\Admin\xdwdiscord.exe" /RL HIGHEST & exit
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:1964
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc minute /mo 1 /tn "Chrome.exe" /tr "C:\Users\Admin\xdwdiscord.exe" /RL HIGHEST
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3300
- C:\Windows\SYSTEM32\cmd.exe
  "cmd" /c schtasks /create /f /sc minute /mo 30 /tn "jusched.exe" /tr "C:\Program Files\xdwdtesting.exe" /RL HIGHEST & exit
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:4512
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc minute /mo 30 /tn "jusched.exe" /tr "C:\Program Files\xdwdtesting.exe" /RL HIGHEST
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3424
- C:\Users\Admin\xdwdiscord.exe
  "C:\Users\Admin\xdwdiscord.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  PID:2620

C:\Users\Admin\xdwdiscord.exe
C:\Users\Admin\xdwdiscord.exe
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
PID:3396

C:\Users\Admin\xdwdiscord.exe
"C:\Users\Admin\xdwdiscord.exe"
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
PID:1252

C:\Users\Admin\xdwdiscord.exe
"C:\Users\Admin\xdwdiscord.exe"
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
PID:4284

C:\Users\Admin\xdwdiscord.exe
"C:\Users\Admin\xdwdiscord.exe"
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
PID:2504

C:\Users\Admin\xdwdiscord.exe
"C:\Users\Admin\xdwdiscord.exe"
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
PID:4956

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Winlogon Helper DLL

1

T1547.004

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

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

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

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

xdwd.dll

Path C:\Windows\xdwd.dll
Size 136KB
SHA256 35c8d022e1d917f1aabdceae98097ccc072161b302f84c768ca63e4b32ac2b66
MD5 16e5a492c9c6ae34c59683be9c51fa31
SHA1 97031b41f5c56f371c28ae0d62a2df7d585adaba
SHA512 20fd369172ef5e3e2fde388666b42e8fe5f0c2bfa338c0345f45e98af6561a249ba3ecc48c3f16efcc73f02ecb67b3ddb1e2e8f0e77d18fa00ac34e6379e50b6
SSDEEP 3072:t0iX+jLyDcqaH9a6DFHo6MjD7VbZaZaZ8Xwlk4MHWZpt:t07yDSvdoRj2up
TLSH
T151D35B0772A500BFE1668638C5630A09E777B8211770DBAF33A4429D9F277E19D3AF61
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/3396-222-0x000000001C120000-0x000000001C12C000-memory.dmp

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memory/3396-227-0x0000000001700000-0x0000000001712000-memory.dmp

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memory/3896-0-0x0000000000590000-0x000000000060E000-memory.dmp

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memory/3896-1-0x00007FFBB062F000-0x00007FFBB0630000-memory.dmp

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memory/3896-2-0x00007FFBB04A0000-0x00007FFBB0E44000-memory.dmp

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memory/3896-3-0x00007FFBB04A0000-0x00007FFBB0E44000-memory.dmp

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memory/3896-4-0x00007FFBB04A0000-0x00007FFBB0E44000-memory.dmp

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memory/3896-209-0x00007FFBB04A0000-0x00007FFBB0E44000-memory.dmp

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memory/3896-219-0x00007FFBB04A0000-0x00007FFBB0E44000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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