sheetrat | cc25b8243b1d5dcdd86d74950063ffc3de60516c56585af2414d7bee3efb6936

General

Target
olf1d1kqjx6nkhnz.exe
Size 181KB
Sample261023-mtfbvs1y2j
SHA256 cc25b8243b1d5dcdd86d74950063ffc3de60516c56585af2414d7bee3efb6936
MD5 110904d0d38f8892720c3498c81ee136
SHA1 96af6a8bfa7178a01716321669330e66eefa73de
SHA512 a9935c19e1ad43847c706c17b60bccf5f5a13d99242d1f5b5774b477a73817b328b5e0c249b55ec167c6e7809ffecee037c8dbb05086eb6120bec8c81590d4ca
SSDEEP 3072:gEHTjB5jGRXCWQ/r4z8RF5gh+rx/pvU98vdy1TzW4iY/gkYtdWhObl7FEG0:Z5u/O4QVm0BG2vdy1TbD/8Wwbn
TLSH
T1A304F140B7D896F1EA9F46BE53528208A275C1738C47C70B7DCB8DEB25423D6A716CCA
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery execution sheetrat persistence privilege_escalation trojan

Malware Config

Extracted

Family

sheetrat

Version

1.8

C2

openport.pw:40131

Mutex

Attributes

anti_virtual
false
certificate
cfxobj705xusxlh
exclusion_wd
false
hidden_file
true
install
true
install_watch_dog
true
key
kvkgxv65dh1k
path_client
%LocalApplicationData%\xdwdxd.exe
path_watch_dog
%LocalApplicationData%\xdwdbot.exe
pump
false
rootkit
jozymk4w6rtdpu
task_client
svchost
task_watch_dog
svchost
use_install_admin
false
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
behavioral1/memory/4504-0-0x00000000009B0000-0x00000000009E2000-memory.dmp	family_sheetrat_v1
behavioral1/files/0x0008000000024621-4.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:\\Users\\Admin\\AppData\\Local\\xdwdxd.exe"	olf1d1kqjx6nkhnz.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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-681733028-2344970462-962213935-1000\Control Panel\International\Geo\Nation	olf1d1kqjx6nkhnz.exe

Executes dropped EXE 4 IoCs

pid	Process
5604	xdwdxd.exe
632	xdwdxd.exe
6024	xdwdxd.exe
3408	xdwdxd.exe

Loads dropped DLL 9 IoCs

pid	Process
5376	Process not Found
5604	xdwdxd.exe
632	xdwdxd.exe
5228	Process not Found
1504	Process not Found
4940	Process not Found
2752	Process not Found
6024	xdwdxd.exe
3408	xdwdxd.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\xdwd.dll	olf1d1kqjx6nkhnz.exe
File opened for modification	C:\Windows\xdwd.dll	olf1d1kqjx6nkhnz.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 1 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
5168	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 10 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	olf1d1kqjx6nkhnz.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	xdwdxd.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	xdwdxd.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	xdwdxd.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	xdwdxd.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	xdwdxd.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	olf1d1kqjx6nkhnz.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	xdwdxd.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	xdwdxd.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	xdwdxd.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
3128	schtasks.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	4504	olf1d1kqjx6nkhnz.exe
Token: SeDebugPrivilege	5604	xdwdxd.exe
Token: SeDebugPrivilege	632	xdwdxd.exe
Token: SeIncBasePriorityPrivilege	5604	xdwdxd.exe
Token: SeDebugPrivilege	6024	xdwdxd.exe
Token: SeDebugPrivilege	3408	xdwdxd.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4504 wrote to memory of 6064	4504	olf1d1kqjx6nkhnz.exe	87
PID 4504 wrote to memory of 5168	4504	olf1d1kqjx6nkhnz.exe	88
PID 5168 wrote to memory of 3128	5168	cmd.exe	91
PID 4504 wrote to memory of 632	4504	olf1d1kqjx6nkhnz.exe	94

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\olf1d1kqjx6nkhnz.exe
"C:\Users\Admin\AppData\Local\Temp\olf1d1kqjx6nkhnz.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Drops file in Windows directory
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4504
- C:\Windows\SYSTEM32\CMD.exe
  "CMD" netsh advfirewall firewall add rule name="-:9p&~=\&9ol&+" dir=in action=allow program="C:\Users\Admin\AppData\Local\xdwdxd.exe" enable=yes & exit
  2⤵
  PID:6064
- C:\Windows\SYSTEM32\cmd.exe
  "cmd" /c schtasks /create /f /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Local\xdwdxd.exe" /RL HIGHEST & exit
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:5168
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Local\xdwdxd.exe" /RL HIGHEST
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3128
- C:\Users\Admin\AppData\Local\xdwdxd.exe
  "C:\Users\Admin\AppData\Local\xdwdxd.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Reads the TCP/IP host and domain name from the registry
  - Suspicious use of AdjustPrivilegeToken
  PID:632

C:\Users\Admin\AppData\Local\xdwdxd.exe
C:\Users\Admin\AppData\Local\xdwdxd.exe
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
PID:5604

C:\Users\Admin\AppData\Local\xdwdxd.exe
C:\Users\Admin\AppData\Local\xdwdxd.exe
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
PID:6024

C:\Users\Admin\AppData\Local\xdwdxd.exe
C:\Users\Admin\AppData\Local\xdwdxd.exe
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
PID:3408

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

2

T1012

System Information Discovery

2

T1082

System Network Configuration Discovery

1

T1016

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

xdwdxd.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\xdwdxd.exe.log
Size 642B
SHA256 f9481e31897c3d9071b744e1638942b52c46858c16ccf692f5c6e109a8b092f6
MD5 e19ed69089e56bbfaaba5e5e63d0354f
SHA1 287519bf7c4ec630e4326db00809f627f927ebef
SHA512 c4a8678d28eea4c3a3adfe0324943478efabef839d3bdacb0e4c278e97ee356037c0bfd83b096952b43d81af0b7253eb7d666416e0024ce93a1c516a834fd05b
TLSH
T18EF078313365E2D889663F16282C268803BF4765E690EE0C7594A2AED9365235F212E7
MD5 SHA1 SHA512 TLSH

Submit Download

tmpE967.tmp.gif

Path C:\Users\Admin\AppData\Local\Temp\tmpE967.tmp.gif
Size 105KB
SHA256 bd220e47fdca76823b1a659fad2c46e9fa2c54d4e928086fa666c34b3fd98cc5
MD5 18f4ec7c064345a9d63ec2ca8fc08269
SHA1 d658c51c28bf28ee08d4d805e3d4d0bb408ea15a
SHA512 feb6006d5b4b17b46d669d72d2cc6b94f7a47b6f283b8e35f55cba494136a771b87494080c8fe6d1128b9d2b053cbf82c5bb3a42026ca40c18b5d03f7fc02a8c
SSDEEP 3072:YpDZwTj494ly3aPFKOEv63mkP/6STjrMpkcW29Hd+ufrh:cDZp94w3qFqFsBTjrMpkQvrh
TLSH
T1C5B312FD067B9A81D32C012D2B858EB596D9390C63112368C9B8C786643C7C6E79F6B3
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

xdwdxd.exe

Path C:\Users\Admin\AppData\Local\xdwdxd.exe
Size 181KB
SHA256 cc25b8243b1d5dcdd86d74950063ffc3de60516c56585af2414d7bee3efb6936
MD5 110904d0d38f8892720c3498c81ee136
SHA1 96af6a8bfa7178a01716321669330e66eefa73de
SHA512 a9935c19e1ad43847c706c17b60bccf5f5a13d99242d1f5b5774b477a73817b328b5e0c249b55ec167c6e7809ffecee037c8dbb05086eb6120bec8c81590d4ca
SSDEEP 3072:gEHTjB5jGRXCWQ/r4z8RF5gh+rx/pvU98vdy1TzW4iY/gkYtdWhObl7FEG0:Z5u/O4QVm0BG2vdy1TbD/8Wwbn
TLSH
T1A304F140B7D896F1EA9F46BE53528208A275C1738C47C70B7DCB8DEB25423D6A716CCA
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

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

Submit Download

memory/4504-0-0x00000000009B0000-0x00000000009E2000-memory.dmp

Download

memory/5604-110-0x000000001F3C0000-0x000000001F48A000-memory.dmp

Download

memory/5604-111-0x0000000001170000-0x000000000117C000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads