Analysis
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max time kernel
30s -
max time network
132s -
platform
windows7_x64 -
resource
win7-20221111-en -
resource tags
arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system -
submitted
16-11-2022 06:15
Static task
static1
Behavioral task
behavioral1
Sample
vbc.exe
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
vbc.exe
Resource
win10v2004-20220812-en
General
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Target
vbc.exe
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Size
858KB
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MD5
7fb9b2d5837ba9d8b7ea0ad5d75f4c7e
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SHA1
82964b5e19f148755650d2ed0acfa6c74b6b9c6e
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SHA256
d29075d85d60a21f86b7ac67c4dcf41ca46a96b208681b3f3486d07182ec620a
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SHA512
d0f7c55e2f3ea8b11e7f258afa8006719ad5476b5eb82d2e3278847ab4883186a88954cde38b6c8b4f63b383db16ba2dc2a61364fff3e31d02bbb240bd8ed777
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SSDEEP
12288:huhWHStbpxyNzXkoyhjDZbhqLY9c1IDf56F1KbMUhllldGl0u4:0UHXcnaYNj5qGPvjx
Malware Config
Extracted
Protocol: smtp- Host:
smtp.yandex.com - Port:
587 - Username:
snakelogs@yandex.com - Password:
tqzwrcdhriqzrjyb
Extracted
agenttesla
Protocol: smtp- Host:
smtp.yandex.com - Port:
587 - Username:
snakelogs@yandex.com - Password:
tqzwrcdhriqzrjyb
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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Uses the VBS compiler for execution 1 TTPs
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Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
Processes:
CasPol.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 CasPol.exe Key opened \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 CasPol.exe Key opened \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 CasPol.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
CasPol.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\rgsyd = "C:\\Users\\Admin\\AppData\\Roaming\\rgsyd\\rgsyd.exe" CasPol.exe -
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 3 api.ipify.org 4 api.ipify.org -
Suspicious use of SetThreadContext 1 IoCs
Processes:
vbc.exedescription pid process target process PID 1284 set thread context of 1064 1284 vbc.exe CasPol.exe -
Program crash 1 IoCs
Processes:
WerFault.exepid pid_target process target process 588 1284 WerFault.exe vbc.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
CasPol.exepid process 1064 CasPol.exe 1064 CasPol.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
CasPol.exedescription pid process Token: SeDebugPrivilege 1064 CasPol.exe -
Suspicious use of WriteProcessMemory 12 IoCs
Processes:
vbc.exedescription pid process target process PID 1284 wrote to memory of 1064 1284 vbc.exe CasPol.exe PID 1284 wrote to memory of 1064 1284 vbc.exe CasPol.exe PID 1284 wrote to memory of 1064 1284 vbc.exe CasPol.exe PID 1284 wrote to memory of 1064 1284 vbc.exe CasPol.exe PID 1284 wrote to memory of 1064 1284 vbc.exe CasPol.exe PID 1284 wrote to memory of 1064 1284 vbc.exe CasPol.exe PID 1284 wrote to memory of 1064 1284 vbc.exe CasPol.exe PID 1284 wrote to memory of 1064 1284 vbc.exe CasPol.exe PID 1284 wrote to memory of 1064 1284 vbc.exe CasPol.exe PID 1284 wrote to memory of 588 1284 vbc.exe WerFault.exe PID 1284 wrote to memory of 588 1284 vbc.exe WerFault.exe PID 1284 wrote to memory of 588 1284 vbc.exe WerFault.exe -
outlook_office_path 1 IoCs
Processes:
CasPol.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 CasPol.exe -
outlook_win_path 1 IoCs
Processes:
CasPol.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 CasPol.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\vbc.exe"C:\Users\Admin\AppData\Local\Temp\vbc.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe"2⤵
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
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C:\Windows\system32\WerFault.exeC:\Windows\system32\WerFault.exe -u -p 1284 -s 7602⤵
- Program crash
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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memory/588-64-0x0000000000000000-mapping.dmp
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memory/1064-58-0x0000000000400000-0x0000000000468000-memory.dmpFilesize
416KB
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memory/1064-59-0x0000000000437BEE-mapping.dmp
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memory/1064-61-0x0000000000400000-0x0000000000468000-memory.dmpFilesize
416KB
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memory/1064-63-0x0000000000400000-0x0000000000468000-memory.dmpFilesize
416KB
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memory/1064-65-0x00000000766F1000-0x00000000766F3000-memory.dmpFilesize
8KB
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memory/1284-54-0x0000000000BB0000-0x0000000000C8A000-memory.dmpFilesize
872KB
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memory/1284-55-0x000000001AE70000-0x000000001AF1C000-memory.dmpFilesize
688KB
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memory/1284-56-0x000000001B2F0000-0x000000001B39A000-memory.dmpFilesize
680KB
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memory/1284-57-0x000000001B3A0000-0x000000001B446000-memory.dmpFilesize
664KB