Analysis
- max time kernel
149s - max time network
160s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
16/04/2026, 10:24
General
- Target SharpBuild.exe
- Size 3.0MB
- Sample260416-mfd7mscy4q
- SHA256 29e60d3f28c6b5c63713f2434c1a114039047984944d2952a5d7b98606251d7b
Malware Config
Extracted
-
sharpstealer
-
https://api.telegram.org/bot7166304392:AAEkUKcPSw2g7iHxllKwDOpDrAdI6IwS0P4/sendMessage?chat_id=1203483078
-
proxy_port
168.235.103.57:3128
-
vime_world
false
Signatures
- Family: Sharp Stealer
Sharp Stealer is an infostealer first observed in 2024, based on Echelon and Umbral stealers.
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 1 IoCs
- Reads user/profile data of web browsers 3 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 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\SharpBuild.exe"C:\Users\Admin\AppData\Local\Temp\SharpBuild.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\RarSFX0\sharp_build.exe"C:\Users\Admin\AppData\Local\Temp\RarSFX0\sharp_build.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 v16
Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
2Credentials In Files
2Replay Monitor
Loading Replay Monitor...
Downloads
Process.txt
248a40c5-3ac6-4c1e-87d2-efd56f5bd36a
BouncyCastle.Crypto.dll
Newtonsoft.Json.dll
SQLite.Interop.dll
System.Data.SQLite.dll
sharp_build.exe
tmp168C.tmp.dat
tmp16BE.tmp.dat
memory/3132-63-0x0000024051FE0000-0x0000024052030000-memory.dmp
memory/3132-76-0x0000024051F10000-0x0000024051F36000-memory.dmp
memory/3132-68-0x00000240521E0000-0x0000024052246000-memory.dmp
memory/3132-70-0x0000024052580000-0x00000240528AE000-memory.dmp
memory/3132-58-0x0000024051F60000-0x0000024051FD6000-memory.dmp
memory/3132-62-0x00000240520A0000-0x0000024052152000-memory.dmp
memory/3132-75-0x0000024052030000-0x000002405206A000-memory.dmp
memory/3132-66-0x0000024051EE0000-0x0000024051F02000-memory.dmp
memory/3132-81-0x0000024054250000-0x0000024054412000-memory.dmp
memory/3132-23-0x0000024051B30000-0x0000024051B40000-memory.dmp
memory/3132-22-0x00000240374E0000-0x0000024037548000-memory.dmp
memory/3132-171-0x0000024052160000-0x000002405217E000-memory.dmp
memory/3132-173-0x0000024037B00000-0x0000024037B0C000-memory.dmp
memory/3132-174-0x0000024039290000-0x00000240392A2000-memory.dmp
memory/4084-176-0x0000000005590000-0x00000000059CB000-memory.dmp