Analysis
- max time kernel
150s - max time network
150s - platform
windows10_x64 - resource
win10v20201028 - submitted
10/02/2021, 12:55
General
- Target Appraisal.exe
- Size 530KB
- Sample210210-b6a4cqabja
- SHA256 96282ae0c75bb56416f86fcc7891e115bde36d92cc5137873f1ea6117564ccee
Malware Config
Extracted
-
Protocol
smtp
-
Host
smtp.yandex.ru
-
Port
587
-
Username
-
Password
p34gTdA9zQgpr87mb8
Signatures
- Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
- Snake Keylogger Payload 2 IoCs
- Loads dropped DLL 2 IoCs
- Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
- Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious use of SetThreadContext 1 IoCs
- Suspicious behavior: EnumeratesProcesses 9 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 4 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Appraisal.exe"C:\Users\Admin\AppData\Local\Temp\Appraisal.exe"1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\Appraisal.exe"C:\Users\Admin\AppData\Local\Temp\Appraisal.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/3140-5-0x0000000073420000-0x0000000073B0E000-memory.dmp
memory/3140-6-0x0000000004930000-0x0000000004994000-memory.dmp
memory/3140-8-0x0000000004B90000-0x0000000004B91000-memory.dmp
memory/3140-9-0x00000000050F0000-0x00000000050F1000-memory.dmp
memory/3140-10-0x0000000000400000-0x000000000047A000-memory.dmp
memory/3140-11-0x0000000004A10000-0x0000000004A11000-memory.dmp
memory/3140-12-0x0000000004A12000-0x0000000004A13000-memory.dmp
memory/3140-13-0x0000000004A13000-0x0000000004A14000-memory.dmp
memory/3140-14-0x0000000004A14000-0x0000000004A15000-memory.dmp
memory/3140-15-0x0000000005A80000-0x0000000005A81000-memory.dmp
memory/3140-16-0x0000000005C50000-0x0000000005C51000-memory.dmp
memory/3140-17-0x0000000005DC0000-0x0000000005DC1000-memory.dmp
memory/3140-18-0x0000000004A17000-0x0000000004A19000-memory.dmp