sheetrat | aacebfd1ca9bf892bcc9fbf965eb14f9c8b5780ab34189c4991e28a2ea84f705

Analysis

max time kernel
148s
max time network
122s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
29/07/2026, 17:22

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General

Target
SlinkyClient.exe
Size 534KB
Sample260729-vxjgpayclf
SHA256 aacebfd1ca9bf892bcc9fbf965eb14f9c8b5780ab34189c4991e28a2ea84f705
MD5 42b1f0b574f7354afec8fed793144f43
SHA1 93f03209e0e46f74d96692a5c5305df95409439c
SHA512 436639faa5e8a5a7f3c5b0a8c1f7203036ddb877e2ad9dc69edd8a2858a0b62fb348f7c97c3f5080fb7c97cf9759ee53922ff72427121aab350eabb29f70f5a8
SSDEEP 6144:9VmkaZO2zrlioEbj2apWkKzo6OLcVrJtI8CnbCy63E13NmsxLbKuemOfPn4:bxa1zhioEO4UJmE53E+sx7sn4
TLSH
T1DEC46E0CFE91E805DE1E3CB7CFE911004B7165C1AE169542314AAFFE8B663B259E267C
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

sheet_aqqvcqvqsne defense_evasion execution sheetrat persistence trojan

Malware Config

Extracted

Family

sheetrat

Version

Campaign

Sheet_aqqvcqvqsne

nc2ugfqzhy.localto.net:5839

Signatures

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

Detects Sheetrat obfuscated V1.8 and higher 2 IoCs

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

resource	yara_rule
behavioral2/memory/4580-0-0x0000000000B90000-0x0000000000C1C000-memory.dmp	family_sheetrat_v4
behavioral2/files/0x0006000000016cd1-12.dat	family_sheetrat_v4

Detects Sheetrat obfuscated version 2 IoCs

resource	yara_rule
behavioral2/memory/4580-0-0x0000000000B90000-0x0000000000C1C000-memory.dmp	Sheetrat_v5
behavioral2/files/0x0006000000016cd1-12.dat	Sheetrat_v5

Modifies WinLogon for persistence 2 TTPs 2 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\\Music\\Sub\\Client.exe"	SlinkyClient.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\System32\\userinit.exe"	SlinkyClient.exe

Executes dropped EXE 3 IoCs

pid	Process
6056	Client.exe
1576	WatchDog.exe
876	Client.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3989226554-2204910950-1522900112-1000\Software\Microsoft\Windows\CurrentVersion\Run\SlinkyLoader = "C:\\Users\\Admin\\Music\\Sub\\WatchDog.exe"	SlinkyClient.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 7 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
5312	CMD.exe
2088	CMD.exe
2036	CMD.exe
3444	cmd.exe
5864	cmd.exe
2500	cmd.exe
3976	cmd.exe

Delays execution with timeout.exe 2 IoCs

defense_evasion

pid	Process
2940	timeout.exe
4940	timeout.exe

Kills process with taskkill 1 IoCs

defense_evasion

pid	Process
1252	taskkill.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{3dfdf296-dbec-4fb4-81d1-6a3438bcf4de}\Instance\	WatchDog.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
816	schtasks.exe
4812	schtasks.exe
4944	schtasks.exe

Suspicious behavior: EnumeratesProcesses 59 IoCs

pid	Process
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
1576	WatchDog.exe
4580	SlinkyClient.exe
4580	SlinkyClient.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	4580	SlinkyClient.exe
Token: SeDebugPrivilege	6056	Client.exe
Token: SeDebugPrivilege	1576	WatchDog.exe
Token: SeDebugPrivilege	876	Client.exe
Token: SeDebugPrivilege	1252	taskkill.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 4580 wrote to memory of 5312	4580	SlinkyClient.exe	90
PID 5312 wrote to memory of 816	5312	CMD.exe	92
PID 4580 wrote to memory of 2088	4580	SlinkyClient.exe	93
PID 2088 wrote to memory of 4812	2088	CMD.exe	95
PID 4580 wrote to memory of 2036	4580	SlinkyClient.exe	97
PID 2036 wrote to memory of 4944	2036	CMD.exe	99
PID 1576 wrote to memory of 876	1576	WatchDog.exe	108
PID 4580 wrote to memory of 3444	4580	SlinkyClient.exe	109
PID 4580 wrote to memory of 5864	4580	SlinkyClient.exe	111
PID 4580 wrote to memory of 2500	4580	SlinkyClient.exe	113
PID 3444 wrote to memory of 4180	3444	cmd.exe	115
PID 5864 wrote to memory of 3504	5864	cmd.exe	116
PID 2500 wrote to memory of 792	2500	cmd.exe	117
PID 4580 wrote to memory of 3976	4580	SlinkyClient.exe	118
PID 3976 wrote to memory of 2940	3976	cmd.exe	120
PID 3976 wrote to memory of 1252	3976	cmd.exe	121
PID 3976 wrote to memory of 4940	3976	cmd.exe	122

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\SlinkyClient.exe
"C:\Users\Admin\AppData\Local\Temp\SlinkyClient.exe"
1⤵
- Modifies WinLogon for persistence
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4580
- C:\Windows\SYSTEM32\CMD.exe
  "CMD" /C SchTaSKs /CrEAte /F /sc OnLoGoN /rl HighEst /tn "niga" /tr "C:\Users\Admin\Music\Sub\Client.exe" & exit
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:5312
- - C:\Windows\system32\schtasks.exe
    SchTaSKs /CrEAte /F /sc OnLoGoN /rl HighEst /tn "niga" /tr "C:\Users\Admin\Music\Sub\Client.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:816
- C:\Windows\SYSTEM32\CMD.exe
  "CMD" /c SchTaSKs /create /f /sc minute /mo -1 /tn "BadlionClient" /tr "C:\Users\Admin\Music\Sub\Client.exe" /RL HIGHEST & exit
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:2088
- - C:\Windows\system32\schtasks.exe
    SchTaSKs /create /f /sc minute /mo -1 /tn "BadlionClient" /tr "C:\Users\Admin\Music\Sub\Client.exe" /RL HIGHEST
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4812
- C:\Windows\SYSTEM32\CMD.exe
  "CMD" /c SchTaSKs /create /f /sc minute /mo 5 /tn "BadlionClient" /tr "C:\Users\Admin\Music\Sub\WatchDog.exe" /RL HIGHEST & exit
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:2036
- - C:\Windows\system32\schtasks.exe
    SchTaSKs /create /f /sc minute /mo 5 /tn "BadlionClient" /tr "C:\Users\Admin\Music\Sub\WatchDog.exe" /RL HIGHEST
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4944
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtASks /deLeTe /F /Tn "niga" & exit
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:3444
- - C:\Windows\system32\schtasks.exe
    schtASks /deLeTe /F /Tn "niga"
    3⤵
    PID:4180
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtASks /deLeTe /F /Tn "BadlionClient" & exit
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:5864
- - C:\Windows\system32\schtasks.exe
    schtASks /deLeTe /F /Tn "BadlionClient"
    3⤵
    PID:3504
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtASks /deLeTe /F /Tn "BadlionClient" & exit
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:2500
- - C:\Windows\system32\schtasks.exe
    schtASks /deLeTe /F /Tn "BadlionClient"
    3⤵
    PID:792
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp3574.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:3976
- - C:\Windows\system32\timeout.exe
    timeout 5
    3⤵
    - Delays execution with timeout.exe
    PID:2940
- - C:\Windows\system32\taskkill.exe
    taskkill /im Client.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1252
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4940

C:\Users\Admin\Music\Sub\Client.exe
C:\Users\Admin\Music\Sub\Client.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:6056

C:\Users\Admin\Music\Sub\WatchDog.exe
C:\Users\Admin\Music\Sub\WatchDog.exe
1⤵
- Executes dropped EXE
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1576
- C:\Users\Admin\Music\Sub\Client.exe
  "C:\Users\Admin\Music\Sub\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:876

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:4228

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmp3574.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp3574.tmp.bat
Size 194B
SHA256 cfe567a3642e5268196ca2050101f8832dce15a9c3bcc99fbcf034ca16414c0e
MD5 e4344b7ad8d3ff623a97b67c8f75a4ea
SHA1 36268d23bc4a711ff1eabefdcc98319a4f08e040
SHA512 19a9a74bb87753fb09fa8b22cd4842340514662d5ffa956299db306f754786379bc483aa0c5fbe07b49f4f07dc1b72f7a8de0ed7af735b387c49d55f770bae8e
TLSH
T14EC0220139CFF2A52E4064120271C0CDE1AEF8221D03B780A38C10487400C1DE27A388
MD5 SHA1 SHA512 TLSH

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Client.exe

Path C:\Users\Admin\Music\Sub\Client.exe
Size 534KB
SHA256 aacebfd1ca9bf892bcc9fbf965eb14f9c8b5780ab34189c4991e28a2ea84f705
MD5 42b1f0b574f7354afec8fed793144f43
SHA1 93f03209e0e46f74d96692a5c5305df95409439c
SHA512 436639faa5e8a5a7f3c5b0a8c1f7203036ddb877e2ad9dc69edd8a2858a0b62fb348f7c97c3f5080fb7c97cf9759ee53922ff72427121aab350eabb29f70f5a8
SSDEEP 6144:9VmkaZO2zrlioEbj2apWkKzo6OLcVrJtI8CnbCy63E13NmsxLbKuemOfPn4:bxa1zhioEO4UJmE53E+sx7sn4
TLSH
T1DEC46E0CFE91E805DE1E3CB7CFE911004B7165C1AE169542314AAFFE8B663B259E267C
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/4580-4-0x00007FFE4FF50000-0x00007FFE508F4000-memory.dmp

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memory/4580-38-0x00007FFE4FF50000-0x00007FFE508F4000-memory.dmp

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memory/4580-0-0x0000000000B90000-0x0000000000C1C000-memory.dmp

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memory/4580-5-0x00007FFE4FF50000-0x00007FFE508F4000-memory.dmp

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memory/4580-6-0x00007FFE4FF50000-0x00007FFE508F4000-memory.dmp

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memory/4580-7-0x00007FFE4FF50000-0x00007FFE508F4000-memory.dmp

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memory/4580-2-0x00007FFE4FF50000-0x00007FFE508F4000-memory.dmp

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memory/4580-3-0x00007FFE4FF50000-0x00007FFE508F4000-memory.dmp

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memory/4580-42-0x0000000002EC0000-0x0000000002ECC000-memory.dmp

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memory/4580-41-0x000000001ECA0000-0x000000001ED16000-memory.dmp

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memory/4580-43-0x000000001CA40000-0x000000001CA5E000-memory.dmp

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memory/4580-44-0x00007FFE4FF50000-0x00007FFE508F4000-memory.dmp

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memory/4580-1-0x00007FFE500DF000-0x00007FFE500E0000-memory.dmp

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memory/4580-50-0x00007FFE4FF50000-0x00007FFE508F4000-memory.dmp

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