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Analysis
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max time kernel
148s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system -
submitted
02/02/2023, 10:43
Behavioral task
behavioral1
Sample
tmp.exe
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
tmp.exe
Resource
win10v2004-20221111-en
General
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Target
tmp.exe
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Size
6KB
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MD5
679104fb0479ff61c4b5e4b88f77d94b
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SHA1
bfbcb5d48fb4ab25d52e4e1bedf37a4e7a4a3cab
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SHA256
4134bd82bbea78103d0e32728df856870eaa2c0188b59423115c7d779b2bf83a
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SHA512
7cb36200865267885939956614a7b8603cd16575a3857e0ecc238ff22d296b29bfb208bb11f61f3856278f6b4585afdb2c8456d2f2630f0fbc33fa298df0253e
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SSDEEP
192:zU3efq7iEM9gdH98dfQbLE5lF22vjWwID:Q3efq7iEM9gdH98dfgLE5lI2vjlI
Malware Config
Extracted
purecrypter
https://onedrive.live.com/download?cid=A113DD34A0D77810&resid=A113DD34A0D77810%21125&authkey=AIgE8y9D-kUp_qA
Extracted
remcos
RemoteHost
top.thekillforabuse1.xyz:1068
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audio_folder
MicRecords
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audio_record_time
5
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connect_delay
0
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connect_interval
1
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copy_file
remcos.exe
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copy_folder
Remcos
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delete_file
false
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hide_file
false
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hide_keylog_file
false
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install_flag
false
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keylog_crypt
false
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keylog_file
logs.dat
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keylog_flag
false
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keylog_folder
remcos
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mouse_option
false
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mutex
Rmc-R762FE
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screenshot_crypt
false
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screenshot_flag
false
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screenshot_folder
Screenshots
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screenshot_path
%AppData%
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screenshot_time
10
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startup_value
Remcos
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take_screenshot_option
false
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take_screenshot_time
5
Signatures
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PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
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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-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation tmp.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Romgl = "\"C:\\Users\\Admin\\AppData\\Roaming\\Taaewqbiqv\\Romgl.exe\"" tmp.exe -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 4736 set thread context of 2120 4736 tmp.exe 91 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 1112 powershell.exe 1112 powershell.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 4736 tmp.exe Token: SeDebugPrivilege 1112 powershell.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 4736 wrote to memory of 1112 4736 tmp.exe 85 PID 4736 wrote to memory of 1112 4736 tmp.exe 85 PID 4736 wrote to memory of 1112 4736 tmp.exe 85 PID 4736 wrote to memory of 2120 4736 tmp.exe 91 PID 4736 wrote to memory of 2120 4736 tmp.exe 91 PID 4736 wrote to memory of 2120 4736 tmp.exe 91 PID 4736 wrote to memory of 2120 4736 tmp.exe 91 PID 4736 wrote to memory of 2120 4736 tmp.exe 91 PID 4736 wrote to memory of 2120 4736 tmp.exe 91 PID 4736 wrote to memory of 2120 4736 tmp.exe 91 PID 4736 wrote to memory of 2120 4736 tmp.exe 91 PID 4736 wrote to memory of 2120 4736 tmp.exe 91 PID 4736 wrote to memory of 2120 4736 tmp.exe 91 PID 4736 wrote to memory of 2120 4736 tmp.exe 91 PID 4736 wrote to memory of 2120 4736 tmp.exe 91
Processes
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C:\Users\Admin\AppData\Local\Temp\tmp.exe"C:\Users\Admin\AppData\Local\Temp\tmp.exe"1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4736 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1112
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C:\Users\Admin\AppData\Local\Temp\tmp.exeC:\Users\Admin\AppData\Local\Temp\tmp.exe2⤵PID:2120
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