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Analysis
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max time kernel
84s -
max time network
34s -
platform
windows7_x64 -
resource
win7-20221111-en -
resource tags
arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system -
submitted
22/11/2022, 08:38
Static task
static1
Behavioral task
behavioral1
Sample
Bank letter.exe
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
Bank letter.exe
Resource
win10v2004-20221111-en
General
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Target
Bank letter.exe
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Size
1012KB
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MD5
a58b322c74d8dfba9c022607b0d0c26b
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SHA1
380f438ad2620f1582fe9b7d5b2ba84c3d6f3349
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SHA256
322a82cb52dd04f516915780a9eb9865e24bd284fedecf938e345270fa0f83b3
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SHA512
06d2ff7e199a1be0ca7357bb8e9bdbcc63f00d1082cab4ef086f344b6b88c00e2885db5e369329220463237558a43280b0d249349511ca9d6e01f8bac13f3118
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SSDEEP
12288:SLw5APwiU251kh53ZLsVOdl0160HQV7g5D+8Egpe0kOrZsEnGvjbLhsRuDIQoiCa:IPOoSbdlYHQVGioZNtrB3m
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
mail.dmstech.in - Port:
587 - Username:
[email protected] - Password:
0]6F9Az.pqfd - Email To:
[email protected]
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-575491160-2295418218-1540667289-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe Key opened \REGISTRY\USER\S-1-5-21-575491160-2295418218-1540667289-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe Key opened \REGISTRY\USER\S-1-5-21-575491160-2295418218-1540667289-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-575491160-2295418218-1540667289-1000\Software\Microsoft\Windows\CurrentVersion\Run\zBwkauB = "C:\\Users\\Admin\\AppData\\Roaming\\zBwkauB\\zBwkauB.exe" RegSvcs.exe -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 1496 set thread context of 1744 1496 Bank letter.exe 29 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 764 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 1496 Bank letter.exe 1744 RegSvcs.exe 1744 RegSvcs.exe 1744 RegSvcs.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1496 Bank letter.exe Token: SeDebugPrivilege 1744 RegSvcs.exe -
Suspicious use of WriteProcessMemory 16 IoCs
description pid Process procid_target PID 1496 wrote to memory of 764 1496 Bank letter.exe 27 PID 1496 wrote to memory of 764 1496 Bank letter.exe 27 PID 1496 wrote to memory of 764 1496 Bank letter.exe 27 PID 1496 wrote to memory of 764 1496 Bank letter.exe 27 PID 1496 wrote to memory of 1744 1496 Bank letter.exe 29 PID 1496 wrote to memory of 1744 1496 Bank letter.exe 29 PID 1496 wrote to memory of 1744 1496 Bank letter.exe 29 PID 1496 wrote to memory of 1744 1496 Bank letter.exe 29 PID 1496 wrote to memory of 1744 1496 Bank letter.exe 29 PID 1496 wrote to memory of 1744 1496 Bank letter.exe 29 PID 1496 wrote to memory of 1744 1496 Bank letter.exe 29 PID 1496 wrote to memory of 1744 1496 Bank letter.exe 29 PID 1496 wrote to memory of 1744 1496 Bank letter.exe 29 PID 1496 wrote to memory of 1744 1496 Bank letter.exe 29 PID 1496 wrote to memory of 1744 1496 Bank letter.exe 29 PID 1496 wrote to memory of 1744 1496 Bank letter.exe 29 -
outlook_office_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-575491160-2295418218-1540667289-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe -
outlook_win_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-575491160-2295418218-1540667289-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Bank letter.exe"C:\Users\Admin\AppData\Local\Temp\Bank letter.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1496 -
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ZDSHLar" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE985.tmp"2⤵
- Creates scheduled task(s)
PID:764
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"{path}"2⤵
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:1744
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
1KB
MD5535555b643bd44b45b2ab55a26af7cab
SHA13a774ab38153a0f75bc79e7e1cc50aa96b5aa18d
SHA2565b62a93cdab19399df00061a3336a9ca69fb41d51a6e347e39b3c2048dfbc5c9
SHA51236a5618e67340a858dd6fbe69e16352c81074b484db5a5c80577abb93c98a3a9eadf6cb7c2d13179d4ec9c54e8e701d7c03381188bfcf38cf159d1c55b2c7309