Analysis
- max time kernel
93s - max time network
115s - platform
windows10-2004_x64 - resource
win10v2004-20240802-en - resource tags
- submitted
06/09/2024, 12:33
General
- Target External.exe
- Size 4.1MB
- Sample240906-pq7caaweln
- SHA256 a67d7bad3484883985727a2dcb0d586104ba10c3eed594a878c2fb1f8db92536
Malware Config
Extracted
-
sharpstealer
-
https://api.telegram.org/bot7401113895:AAFvlwi14CnG7Kh8lb6sl-p8Z2vBNorD6Pw/sendMessage?chat_id=1171093658
-
max_exfil_filesize
1.5e+06
-
proxy_port
168.235.103.57:3128
-
vime_world
false
Signatures
- Sharp Stealer
Sharp Stealer is an infostealer first observed in 2024, based on Echelon and Umbral stealers.
- Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 1 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Looks up external IP address via web service 5 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Browser Information Discovery 1 TTPs
Enumerate browser information.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 2 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\External.exe"C:\Users\Admin\AppData\Local\Temp\External.exe"1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\windows.exe"C:\Users\Admin\AppData\Local\Temp\windows.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v15
Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
2Credentials In Files
2Replay Monitor
Loading Replay Monitor...
Downloads
25745886-e2cd-465a-9282-69ccac8ec909
BouncyCastle.Crypto.dll
Newtonsoft.Json.dll
SQLite.Interop.dll
System.Data.SQLite.dll
tmp80A2.tmp.dat
tmp80C9.tmp.dat
windows.exe
Process.txt
memory/4248-94-0x0000022ACFDB0000-0x0000022AD00DE000-memory.dmp
memory/4248-96-0x0000022AB66F0000-0x0000022AB6716000-memory.dmp
memory/4248-84-0x0000022ACF480000-0x0000022ACF4D0000-memory.dmp
memory/4248-88-0x0000022ACF6A0000-0x0000022ACF706000-memory.dmp
memory/4248-21-0x0000022AB4AB0000-0x0000022AB4B1A000-memory.dmp
memory/4248-83-0x0000022ACF4F0000-0x0000022ACF5A2000-memory.dmp
memory/4248-85-0x0000022ACF5B0000-0x0000022ACF626000-memory.dmp
memory/4248-86-0x0000022AB68D0000-0x0000022AB68F2000-memory.dmp
memory/4248-95-0x0000022ACFA80000-0x0000022ACFABA000-memory.dmp
memory/4248-20-0x00007FF8BD7B3000-0x00007FF8BD7B5000-memory.dmp
memory/4248-100-0x0000022AD0D00000-0x0000022AD0EC2000-memory.dmp
memory/4248-106-0x00007FF8BD7B0000-0x00007FF8BE271000-memory.dmp
memory/4248-22-0x00007FF8BD7B0000-0x00007FF8BE271000-memory.dmp
memory/4248-195-0x0000022ACF630000-0x0000022ACF64E000-memory.dmp
memory/4248-197-0x00007FF8BD7B0000-0x00007FF8BE271000-memory.dmp