Analysis
-
max time kernel
150s -
max time network
151s -
platform
windows7_x64 -
resource
win7v20201028 -
submitted
28-01-2021 03:05
Static task
static1
Behavioral task
behavioral1
Sample
KOSTAL.exe
Resource
win7v20201028
Behavioral task
behavioral2
Sample
KOSTAL.exe
Resource
win10v20201028
General
-
Target
KOSTAL.exe
-
Size
624KB
-
MD5
18e749290158ac34ad6ec1edcbf8ef01
-
SHA1
5826bddad06961fc3ea9e4c02069ea486cd7a499
-
SHA256
e0ec5ab404593520f98d17976acc233909af7784ea750cd2115d71eccb0b9ace
-
SHA512
18852268da231e15d1a00e07b4ca3abf262ba584986193b47390c0df95161193a806438cf794090d854520c9ecd480b23a9e3e2d77e4fc1d5d8f9741f577c06a
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
smtp.psbusinesparks.com - Port:
587 - Username:
[email protected] - Password:
Alterative432
Signatures
-
AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
-
AgentTesla Payload 3 IoCs
Processes:
resource yara_rule behavioral1/memory/1216-8-0x0000000000400000-0x000000000043C000-memory.dmp family_agenttesla behavioral1/memory/1216-9-0x00000000004374EE-mapping.dmp family_agenttesla behavioral1/memory/1216-11-0x0000000000400000-0x000000000043C000-memory.dmp family_agenttesla -
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.
-
Suspicious use of SetThreadContext 1 IoCs
Processes:
KOSTAL.exedescription pid process target process PID 1096 set thread context of 1216 1096 KOSTAL.exe KOSTAL.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
KOSTAL.exepid process 1216 KOSTAL.exe 1216 KOSTAL.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
KOSTAL.exedescription pid process Token: SeDebugPrivilege 1216 KOSTAL.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
KOSTAL.exepid process 1216 KOSTAL.exe -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
KOSTAL.exedescription pid process target process PID 1096 wrote to memory of 1216 1096 KOSTAL.exe KOSTAL.exe PID 1096 wrote to memory of 1216 1096 KOSTAL.exe KOSTAL.exe PID 1096 wrote to memory of 1216 1096 KOSTAL.exe KOSTAL.exe PID 1096 wrote to memory of 1216 1096 KOSTAL.exe KOSTAL.exe PID 1096 wrote to memory of 1216 1096 KOSTAL.exe KOSTAL.exe PID 1096 wrote to memory of 1216 1096 KOSTAL.exe KOSTAL.exe PID 1096 wrote to memory of 1216 1096 KOSTAL.exe KOSTAL.exe PID 1096 wrote to memory of 1216 1096 KOSTAL.exe KOSTAL.exe PID 1096 wrote to memory of 1216 1096 KOSTAL.exe KOSTAL.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\KOSTAL.exe"C:\Users\Admin\AppData\Local\Temp\KOSTAL.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\KOSTAL.exe"C:\Users\Admin\AppData\Local\Temp\KOSTAL.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
-
memory/1096-2-0x0000000074CF0000-0x00000000753DE000-memory.dmpFilesize
6.9MB
-
memory/1096-3-0x00000000009C0000-0x00000000009C1000-memory.dmpFilesize
4KB
-
memory/1096-5-0x0000000000480000-0x0000000000483000-memory.dmpFilesize
12KB
-
memory/1096-6-0x0000000004C70000-0x0000000004C71000-memory.dmpFilesize
4KB
-
memory/1096-7-0x0000000004B70000-0x0000000004BD8000-memory.dmpFilesize
416KB
-
memory/1216-8-0x0000000000400000-0x000000000043C000-memory.dmpFilesize
240KB
-
memory/1216-9-0x00000000004374EE-mapping.dmp
-
memory/1216-10-0x0000000074CF0000-0x00000000753DE000-memory.dmpFilesize
6.9MB
-
memory/1216-11-0x0000000000400000-0x000000000043C000-memory.dmpFilesize
240KB
-
memory/1216-13-0x00000000049C0000-0x00000000049C1000-memory.dmpFilesize
4KB
-
memory/1216-14-0x00000000049C1000-0x00000000049C2000-memory.dmpFilesize
4KB