sheetrat | a7491fc8695cd4c00d9cb0797f6cb830db562c849fb1f1a2ae796ee508fc95de

General

Target
2026-08-06_f63342158940c33c51b34d67720a9233_akira_cobalt-strike_rusty-stealer_satacom.exe
Size 334KB
Sample260806-bdlcdsbj7x
SHA256 a7491fc8695cd4c00d9cb0797f6cb830db562c849fb1f1a2ae796ee508fc95de
MD5 f63342158940c33c51b34d67720a9233
SHA1 8670c00e49800e9808f677696a56afb80457c335
SHA512 b1a1aff02417c3389f90a745f703784e01c3217bdbccef3d7ba1b81e8124c12406887fbebdd47da4527011729531cd564296c0b4a3fe39aabdc9ef5d49b5ec04
SSDEEP 6144:aaDYxYVNF/9JdIfGjPxvsEsU3JjbKsKvlLELB5cPjpdRZrJm85:ahIxaU3JjmsgOd5cPjdZdf5
TLSH
T12474DF13F65454F8E14EC0B883129566A732B8DA4F2566FF23E862342F25BE53F3CA15
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

execution sheetrat persistence trojan

Malware Config

Extracted

Family

sheetrat

Version

1.8

C2

92.119.165.248:20290

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/files/0x000d00000001c548-4.dat	family_sheetrat_v4
behavioral2/memory/4888-8-0x0000000000FE0000-0x0000000001044000-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\\Public\\Documents\\crashhelper.exe"	runtimesvc.exe

Executes dropped EXE 7 IoCs

pid	Process
4888	runtimesvc.exe
5696	crashhelper.exe
6108	crashhelper.exe
3428	crashhelper.exe
1196	wifiinstaller.exe
1168	crashhelper.exe
1896	crashhelper.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
4136	cmd.exe
3228	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
2052	schtasks.exe
4132	schtasks.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	4888	runtimesvc.exe
Token: SeDebugPrivilege	5696	crashhelper.exe
Token: SeDebugPrivilege	6108	crashhelper.exe
Token: SeDebugPrivilege	3428	crashhelper.exe
Token: SeIncBasePriorityPrivilege	5696	crashhelper.exe
Token: SeDebugPrivilege	1196	wifiinstaller.exe
Token: SeDebugPrivilege	1168	crashhelper.exe
Token: SeDebugPrivilege	1896	crashhelper.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 5668 wrote to memory of 4888	5668	2026-08-06_f63342158940c33c51b34d67720a9233_akira_cobalt-strike_rusty-stealer_satacom.exe	90
PID 4888 wrote to memory of 3352	4888	runtimesvc.exe	93
PID 4888 wrote to memory of 4136	4888	runtimesvc.exe	94
PID 4136 wrote to memory of 2052	4136	cmd.exe	97
PID 4888 wrote to memory of 3228	4888	runtimesvc.exe	98
PID 3228 wrote to memory of 4132	3228	cmd.exe	100
PID 4888 wrote to memory of 6108	4888	runtimesvc.exe	105

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\2026-08-06_f63342158940c33c51b34d67720a9233_akira_cobalt-strike_rusty-stealer_satacom.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-06_f63342158940c33c51b34d67720a9233_akira_cobalt-strike_rusty-stealer_satacom.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5668
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\runtimesvc.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\runtimesvc.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4888
- - C:\Windows\SYSTEM32\CMD.exe
    "CMD" netsh advfirewall firewall add rule name="Ax$Wb^6ob$Smbh" dir=in action=allow program="C:\Users\Public\Documents\crashhelper.exe" enable=yes & exit
    3⤵
    PID:3352
- - C:\Windows\SYSTEM32\cmd.exe
    "cmd" /c schtasks /create /f /sc minute /mo 1 /tn "Shellhost.exe" /tr "C:\Users\Public\Documents\crashhelper.exe" /RL HIGHEST & exit
    3⤵
    - Executes a command shell one-liner
    - Suspicious use of WriteProcessMemory
    PID:4136
  - - C:\Windows\system32\schtasks.exe
      schtasks /create /f /sc minute /mo 1 /tn "Shellhost.exe" /tr "C:\Users\Public\Documents\crashhelper.exe" /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2052
- - C:\Windows\SYSTEM32\cmd.exe
    "cmd" /c schtasks /create /f /sc minute /mo 30 /tn "WinRar.exe" /tr "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCookies\wifiinstaller.exe" /RL HIGHEST & exit
    3⤵
    - Executes a command shell one-liner
    - Suspicious use of WriteProcessMemory
    PID:3228
  - - C:\Windows\system32\schtasks.exe
      schtasks /create /f /sc minute /mo 30 /tn "WinRar.exe" /tr "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCookies\wifiinstaller.exe" /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:4132
- - C:\Users\Public\Documents\crashhelper.exe
    "C:\Users\Public\Documents\crashhelper.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:6108

C:\Users\Public\Documents\crashhelper.exe
"C:\Users\Public\Documents\crashhelper.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3428

C:\Users\Public\Documents\crashhelper.exe
C:\Users\Public\Documents\crashhelper.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5696

C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCookies\wifiinstaller.exe
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCookies\wifiinstaller.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1196

C:\Users\Public\Documents\crashhelper.exe
"C:\Users\Public\Documents\crashhelper.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1168

C:\Users\Public\Documents\crashhelper.exe
"C:\Users\Public\Documents\crashhelper.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1896

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

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

runtimesvc.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\runtimesvc.exe
Size 377KB
SHA256 fb5c77f2700e7d41d0512d82b81af5e0ff6f0c97ab412fa100e4bc2cbb8d5dd6
MD5 70d0f88411d48f5fcdd81f931ed07cfd
SHA1 3cba14e9f3d103887b28826565967d4c3a07432e
SHA512 e340974b272efb086f0f8f6b48ef8405a047b23f7b924cab63c86f4d286c1ae1162dc21d826b537618036c136ceb7e5e565fabcfcf3da5f1045ffec80f78e056
SSDEEP 6144:4R4yMU2yiBP6e3UUkrbcqfI7bLdcKovuzoGwImMixTuO1bGWE3g12Iq:+4yMU2TBeImMiIOoVy2I
TLSH
T15384B5253FA98E10D590197ECA7E3609CB56E0F22502B347370AF6A24D459DEDE2C3DB
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/4888-8-0x0000000000FE0000-0x0000000001044000-memory.dmp

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memory/4888-9-0x00007FFB7385F000-0x00007FFB73860000-memory.dmp

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memory/4888-10-0x00007FFB736D0000-0x00007FFB74074000-memory.dmp

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memory/4888-11-0x00007FFB736D0000-0x00007FFB74074000-memory.dmp

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memory/4888-12-0x00007FFB736D0000-0x00007FFB74074000-memory.dmp

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memory/4888-13-0x00007FFB736D0000-0x00007FFB74074000-memory.dmp

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memory/4888-20-0x00007FFB736D0000-0x00007FFB74074000-memory.dmp

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memory/4888-25-0x00007FFB736D0000-0x00007FFB74074000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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