Malware Analysis Report

2025-06-16 03:22

Sample ID 220510-gc1zcahhgk
Target Cjryjsra.exe
SHA256 fc31934152ea6e5d60c4ee949140d28b2cfe30764451f0c6d62ee2945490656d
Tags
bitrat persistence trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

fc31934152ea6e5d60c4ee949140d28b2cfe30764451f0c6d62ee2945490656d

Threat Level: Known bad

The file Cjryjsra.exe was found to be: Known bad.

Malicious Activity Summary

bitrat persistence trojan

BitRAT

Checks computer location settings

Adds Run key to start application

Suspicious use of SetThreadContext

Suspicious use of NtSetInformationThreadHideFromDebugger

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Delays execution with timeout.exe

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-05-10 05:40

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-05-10 05:40

Reported

2022-05-10 05:45

Platform

win7-20220414-en

Max time kernel

150s

Max time network

180s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe"

Signatures

BitRAT

trojan bitrat

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows\CurrentVersion\Run\Dqpbp = "\"C:\\Users\\Admin\\AppData\\Roaming\\Vaqdsknoc\\Dqpbp.exe\"" C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1840 set thread context of 1956 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe

Enumerates physical storage devices

Delays execution with timeout.exe

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\timeout.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1840 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\SysWOW64\cmd.exe
PID 1840 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\SysWOW64\cmd.exe
PID 1840 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\SysWOW64\cmd.exe
PID 1840 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\SysWOW64\cmd.exe
PID 1208 wrote to memory of 1172 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 1208 wrote to memory of 1172 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 1208 wrote to memory of 1172 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 1208 wrote to memory of 1172 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 1840 wrote to memory of 1956 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 1840 wrote to memory of 1956 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 1840 wrote to memory of 1956 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 1840 wrote to memory of 1956 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 1840 wrote to memory of 1956 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 1840 wrote to memory of 1956 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 1840 wrote to memory of 1956 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 1840 wrote to memory of 1956 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 1840 wrote to memory of 1956 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 1840 wrote to memory of 1956 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 1840 wrote to memory of 1956 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 1840 wrote to memory of 1956 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 1840 wrote to memory of 1956 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 1840 wrote to memory of 1956 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 1840 wrote to memory of 1956 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe

Processes

C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe

"C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c timeout 36

C:\Windows\SysWOW64\timeout.exe

timeout 36

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe

Network

Country Destination Domain Proto
NL 212.193.30.54:3680 tcp
NL 212.193.30.54:3680 tcp
NL 212.193.30.54:3680 tcp
NL 212.193.30.54:3680 tcp
NL 212.193.30.54:3680 tcp

Files

memory/1840-54-0x0000000000B40000-0x0000000000E76000-memory.dmp

memory/1840-55-0x00000000751C1000-0x00000000751C3000-memory.dmp

memory/1840-56-0x0000000005BC0000-0x0000000005EE4000-memory.dmp

memory/1208-57-0x0000000000000000-mapping.dmp

memory/1172-58-0x0000000000000000-mapping.dmp

memory/1840-59-0x0000000008980000-0x0000000008B74000-memory.dmp

memory/1956-60-0x0000000000400000-0x00000000007CE000-memory.dmp

memory/1956-61-0x0000000000400000-0x00000000007CE000-memory.dmp

memory/1956-63-0x0000000000400000-0x00000000007CE000-memory.dmp

memory/1956-65-0x0000000000400000-0x00000000007CE000-memory.dmp

memory/1956-67-0x0000000000400000-0x00000000007CE000-memory.dmp

memory/1956-69-0x0000000000400000-0x00000000007CE000-memory.dmp

memory/1956-70-0x0000000000400000-0x00000000007CE000-memory.dmp

memory/1956-73-0x000000000068A488-mapping.dmp

memory/1956-72-0x0000000000400000-0x00000000007CE000-memory.dmp

memory/1956-75-0x0000000000400000-0x00000000007CE000-memory.dmp

memory/1956-77-0x0000000000400000-0x00000000007CE000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-05-10 05:40

Reported

2022-05-10 05:45

Platform

win10v2004-20220414-en

Max time kernel

153s

Max time network

182s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe"

Signatures

BitRAT

trojan bitrat

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Dqpbp = "\"C:\\Users\\Admin\\AppData\\Roaming\\Vaqdsknoc\\Dqpbp.exe\"" C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4356 set thread context of 608 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe

Enumerates physical storage devices

Delays execution with timeout.exe

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\timeout.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4356 wrote to memory of 1920 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\SysWOW64\cmd.exe
PID 4356 wrote to memory of 1920 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\SysWOW64\cmd.exe
PID 4356 wrote to memory of 1920 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\SysWOW64\cmd.exe
PID 1920 wrote to memory of 3516 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 1920 wrote to memory of 3516 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 1920 wrote to memory of 3516 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 4356 wrote to memory of 376 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 4356 wrote to memory of 376 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 4356 wrote to memory of 376 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 4356 wrote to memory of 608 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 4356 wrote to memory of 608 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 4356 wrote to memory of 608 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 4356 wrote to memory of 608 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 4356 wrote to memory of 608 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 4356 wrote to memory of 608 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 4356 wrote to memory of 608 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 4356 wrote to memory of 608 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 4356 wrote to memory of 608 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 4356 wrote to memory of 608 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
PID 4356 wrote to memory of 608 N/A C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe

Processes

C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe

"C:\Users\Admin\AppData\Local\Temp\Cjryjsra.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c timeout 36

C:\Windows\SysWOW64\timeout.exe

timeout 36

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe

Network

Country Destination Domain Proto
US 93.184.220.29:80 tcp
US 93.184.220.29:80 tcp
NL 52.178.17.2:443 tcp
NL 104.110.191.140:80 tcp
NL 104.110.191.140:80 tcp
NL 104.110.191.140:80 tcp
GB 51.11.168.232:443 tcp
NL 212.193.30.54:3680 tcp
NL 212.193.30.54:3680 tcp
NL 212.193.30.54:3680 tcp
NL 212.193.30.54:3680 tcp

Files

memory/4356-130-0x0000000000060000-0x0000000000396000-memory.dmp

memory/4356-131-0x0000000005370000-0x0000000005914000-memory.dmp

memory/4356-132-0x0000000004DC0000-0x0000000004E52000-memory.dmp

memory/4356-133-0x0000000004D60000-0x0000000004D6A000-memory.dmp

memory/1920-134-0x0000000000000000-mapping.dmp

memory/3516-135-0x0000000000000000-mapping.dmp

memory/376-136-0x0000000000000000-mapping.dmp

memory/608-137-0x0000000000000000-mapping.dmp

memory/608-138-0x0000000000400000-0x00000000007CE000-memory.dmp

memory/608-139-0x0000000000400000-0x00000000007CE000-memory.dmp

memory/608-140-0x0000000000400000-0x00000000007CE000-memory.dmp

memory/608-141-0x0000000000400000-0x00000000007CE000-memory.dmp