Analysis
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max time kernel
149s -
max time network
75s -
platform
windows10_x64 -
resource
win10v20210410 -
submitted
23-08-2021 09:00
Static task
static1
Behavioral task
behavioral1
Sample
SO#5933772-00,xlsx.exe
Resource
win7v20210408
Behavioral task
behavioral2
Sample
SO#5933772-00,xlsx.exe
Resource
win10v20210410
General
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Target
SO#5933772-00,xlsx.exe
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Size
1.0MB
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MD5
3dbc477725b5a88f511f1b4e3bcc38fc
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SHA1
a81ed8a5aed97fb6efa956e5c485f2aad8467e9f
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SHA256
8742189aa8e9303ed7ce67da39348d2bb6628a6c5243c6e9a968499098f42178
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SHA512
60de5350d98658ab152bd361e5a7fe6c5c3f294ced8067a8ea1a3e98004759723457a9e9e36a6cc01c5a35474ab4db06695111a0143972ffb0fdfe55c97da517
Malware Config
Signatures
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A310logger
A310 Logger is a .NET stealer/logger targeting passwords from browsers and email clients.
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A310logger Executable 2 IoCs
resource yara_rule behavioral2/files/0x000100000001ab50-132.dat a310logger behavioral2/files/0x000100000001ab50-133.dat a310logger -
Executes dropped EXE 1 IoCs
pid Process 220 Fox.exe -
Reads local data of messenger clients 2 TTPs
Infostealers often target stored data of messaging applications, which can include saved credentials and account information.
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Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 1728 set thread context of 1200 1728 SO#5933772-00,xlsx.exe 82 -
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 4012 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 3 IoCs
pid Process 1728 SO#5933772-00,xlsx.exe 1728 SO#5933772-00,xlsx.exe 1728 SO#5933772-00,xlsx.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1728 SO#5933772-00,xlsx.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 1200 SO#5933772-00,xlsx.exe -
Suspicious use of WriteProcessMemory 21 IoCs
description pid Process procid_target PID 1728 wrote to memory of 4012 1728 SO#5933772-00,xlsx.exe 79 PID 1728 wrote to memory of 4012 1728 SO#5933772-00,xlsx.exe 79 PID 1728 wrote to memory of 4012 1728 SO#5933772-00,xlsx.exe 79 PID 1728 wrote to memory of 1656 1728 SO#5933772-00,xlsx.exe 81 PID 1728 wrote to memory of 1656 1728 SO#5933772-00,xlsx.exe 81 PID 1728 wrote to memory of 1656 1728 SO#5933772-00,xlsx.exe 81 PID 1728 wrote to memory of 1200 1728 SO#5933772-00,xlsx.exe 82 PID 1728 wrote to memory of 1200 1728 SO#5933772-00,xlsx.exe 82 PID 1728 wrote to memory of 1200 1728 SO#5933772-00,xlsx.exe 82 PID 1728 wrote to memory of 1200 1728 SO#5933772-00,xlsx.exe 82 PID 1728 wrote to memory of 1200 1728 SO#5933772-00,xlsx.exe 82 PID 1728 wrote to memory of 1200 1728 SO#5933772-00,xlsx.exe 82 PID 1728 wrote to memory of 1200 1728 SO#5933772-00,xlsx.exe 82 PID 1728 wrote to memory of 1200 1728 SO#5933772-00,xlsx.exe 82 PID 1200 wrote to memory of 220 1200 SO#5933772-00,xlsx.exe 83 PID 1200 wrote to memory of 220 1200 SO#5933772-00,xlsx.exe 83 PID 1200 wrote to memory of 2376 1200 SO#5933772-00,xlsx.exe 84 PID 1200 wrote to memory of 2376 1200 SO#5933772-00,xlsx.exe 84 PID 1200 wrote to memory of 2376 1200 SO#5933772-00,xlsx.exe 84 PID 2376 wrote to memory of 2384 2376 WinMail.exe 85 PID 2376 wrote to memory of 2384 2376 WinMail.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\SO#5933772-00,xlsx.exe"C:\Users\Admin\AppData\Local\Temp\SO#5933772-00,xlsx.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1728 -
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\VqTEFYQXsiQibk" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE11E.tmp"2⤵
- Creates scheduled task(s)
PID:4012
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C:\Users\Admin\AppData\Local\Temp\SO#5933772-00,xlsx.exe"C:\Users\Admin\AppData\Local\Temp\SO#5933772-00,xlsx.exe"2⤵PID:1656
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C:\Users\Admin\AppData\Local\Temp\SO#5933772-00,xlsx.exe"C:\Users\Admin\AppData\Local\Temp\SO#5933772-00,xlsx.exe"2⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1200 -
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\Fox.exeC:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\Fox.exe3⤵
- Executes dropped EXE
PID:220
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C:\Program Files (x86)\Windows Mail\WinMail.exe"C:\Program Files (x86)\Windows Mail\WinMail" OCInstallUserConfigOE3⤵
- Suspicious use of WriteProcessMemory
PID:2376 -
C:\Program Files\Windows Mail\WinMail.exe"C:\Program Files\Windows Mail\WinMail" OCInstallUserConfigOE4⤵PID:2384
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