Analysis
- max time kernel
150s - max time network
147s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system - submitted
03/03/2024, 10:51
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
virussign.com_b1cf4b5d640ed91ba7023b630e5dbf9b.exe
Resource
win7-20240221-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
virussign.com_b1cf4b5d640ed91ba7023b630e5dbf9b.exe
Resource
win10v2004-20240226-en
windows10-2004-x64
8 signatures
150 seconds
General
- Target virussign.com_b1cf4b5d640ed91ba7023b630e5dbf9b.exe
- Size 88KB
- Sample240303-mx45dshd71
- SHA256 00b38543491d3e2b03f6ea6579ccc1c5480e57c9a6b1f3209ea4af5e62ab8115
- MD5 b1cf4b5d640ed91ba7023b630e5dbf9b
- SHA1 ec80034d69283f644015f1f252328903edb18920
- SHA512 794e868a893a8aeb999c50ea4ac6619351951c41688a05acbc13c0470faaad7166cd521ce70338ebc0505a21138f4478627ef1dc1253eeedf7e26ba8a2982054
- SSDEEP 768:vAn68qOJ+TtKDwHpFeh6gM1rA8dOsc7jUq4RkA5o3K1DfsvtzsXjLft+9o1mm:vAnHqlZKULFjnAzA5o6BfItoXjLl0hm
- MD5 SHA1 SHA512 SSDEEP
Score
10/10
Malware Config
Signatures
- Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" virussign.com_b1cf4b5d640ed91ba7023b630e5dbf9b.exe Set value (int) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" rulin.exe - Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation virussign.com_b1cf4b5d640ed91ba7023b630e5dbf9b.exe - Executes dropped EXE 1 IoCs
pid Process 2036 rulin.exe - Adds Run key to start application 2 TTPs 27 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /t" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /q" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /c" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /y" virussign.com_b1cf4b5d640ed91ba7023b630e5dbf9b.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /y" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /a" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /h" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /b" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /v" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /l" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /r" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /o" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /f" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /w" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /d" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /p" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /k" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /j" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /n" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /m" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /u" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /e" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /s" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /z" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /x" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /i" rulin.exe Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\rulin = "C:\\Users\\Admin\\rulin.exe /g" rulin.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 1196 virussign.com_b1cf4b5d640ed91ba7023b630e5dbf9b.exe 1196 virussign.com_b1cf4b5d640ed91ba7023b630e5dbf9b.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe 2036 rulin.exe - Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 1196 virussign.com_b1cf4b5d640ed91ba7023b630e5dbf9b.exe 2036 rulin.exe - Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 1196 wrote to memory of 2036 1196 virussign.com_b1cf4b5d640ed91ba7023b630e5dbf9b.exe 96 PID 1196 wrote to memory of 2036 1196 virussign.com_b1cf4b5d640ed91ba7023b630e5dbf9b.exe 96 PID 1196 wrote to memory of 2036 1196 virussign.com_b1cf4b5d640ed91ba7023b630e5dbf9b.exe 96
Processes
-
C:\Users\Admin\AppData\Local\Temp\virussign.com_b1cf4b5d640ed91ba7023b630e5dbf9b.exe"C:\Users\Admin\AppData\Local\Temp\virussign.com_b1cf4b5d640ed91ba7023b630e5dbf9b.exe"1⤵
- Modifies visiblity of hidden/system files in Explorer
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1196 -
C:\Users\Admin\rulin.exe"C:\Users\Admin\rulin.exe"2⤵
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:2036
-
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4788 --field-trial-handle=2284,i,15722001240173834669,15048020084704567542,262144 --variations-seed-version /prefetch:81⤵PID:3132
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
- Path C:\Users\Admin\rulin.exe
- Size 88KB
- SHA256 4c9bdc6dc35c443fb29f42df2b30a240b225c67f9ed54625b89e6b58bbde8d3d
- MD5 cb32b5ae8e98b1b8429f5a6f40dcdd23
- SHA1 d0a05ac0f8f5e842537245baf5b2f43d783d49e5
- SHA512 3d2109076536c807858bc5dc50462bdbaaacfca018fc25f868224666675f577b46fd8697b68ab0589629f7b025b79f65448b0e779904a777e4f4fe58e58af720
- SSDEEP 768:vAB68qOJ+TtqRwHpFeh6gM1rA8dOsc7jUq4RkA5o3K1DfsvtzsXjLft+9o1mm:vABHqlZhLFjnAzA5o6BfItoXjLl0hm
- MD5 SHA1 SHA512 SSDEEP