Analysis
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max time kernel
135s -
max time network
135s -
platform
windows7_x64 -
resource
win7v20210408 -
submitted
19-04-2021 12:38
Static task
static1
Behavioral task
behavioral1
Sample
n8L3Z.exe
Resource
win7v20210408
Behavioral task
behavioral2
Sample
n8L3Z.exe
Resource
win10v20210410
General
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Target
n8L3Z.exe
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Size
940KB
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MD5
d7a6c07be5a5f212884d01797c3d5fa6
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SHA1
e4cb2a03354a7417f1062c89b0f08018863380df
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SHA256
71032ee8d3bb7e5b97fc58c2478c58b218730eb7a56929da7c5d4816e202e71c
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SHA512
50cddcdff86594fea2f2ffe24cdef71b0bf9fbd46703f3dca37f2a89630a57ea63c0b5cbd2d0be682e2e9f03bdcb478cd61c5bc959fa7f35d132e70f04f20d7c
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
smtp.mesco-midhco.com - Port:
587 - Username:
[email protected] - Password:
fFEawV%0
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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AgentTesla Payload 3 IoCs
Processes:
resource yara_rule behavioral1/memory/108-68-0x0000000000400000-0x000000000043C000-memory.dmp family_agenttesla behavioral1/memory/108-69-0x000000000043749E-mapping.dmp family_agenttesla behavioral1/memory/108-70-0x0000000000400000-0x000000000043C000-memory.dmp family_agenttesla -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
n8L3Z.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run\pGKuRU = "C:\\Users\\Admin\\AppData\\Roaming\\pGKuRU\\pGKuRU.exe" n8L3Z.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
n8L3Z.exedescription pid process target process PID 1348 set thread context of 108 1348 n8L3Z.exe n8L3Z.exe -
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.
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Suspicious behavior: EnumeratesProcesses 5 IoCs
Processes:
n8L3Z.exen8L3Z.exepid process 1348 n8L3Z.exe 1348 n8L3Z.exe 1348 n8L3Z.exe 108 n8L3Z.exe 108 n8L3Z.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
n8L3Z.exen8L3Z.exedescription pid process Token: SeDebugPrivilege 1348 n8L3Z.exe Token: SeDebugPrivilege 108 n8L3Z.exe -
Suspicious use of WriteProcessMemory 13 IoCs
Processes:
n8L3Z.exedescription pid process target process PID 1348 wrote to memory of 1132 1348 n8L3Z.exe schtasks.exe PID 1348 wrote to memory of 1132 1348 n8L3Z.exe schtasks.exe PID 1348 wrote to memory of 1132 1348 n8L3Z.exe schtasks.exe PID 1348 wrote to memory of 1132 1348 n8L3Z.exe schtasks.exe PID 1348 wrote to memory of 108 1348 n8L3Z.exe n8L3Z.exe PID 1348 wrote to memory of 108 1348 n8L3Z.exe n8L3Z.exe PID 1348 wrote to memory of 108 1348 n8L3Z.exe n8L3Z.exe PID 1348 wrote to memory of 108 1348 n8L3Z.exe n8L3Z.exe PID 1348 wrote to memory of 108 1348 n8L3Z.exe n8L3Z.exe PID 1348 wrote to memory of 108 1348 n8L3Z.exe n8L3Z.exe PID 1348 wrote to memory of 108 1348 n8L3Z.exe n8L3Z.exe PID 1348 wrote to memory of 108 1348 n8L3Z.exe n8L3Z.exe PID 1348 wrote to memory of 108 1348 n8L3Z.exe n8L3Z.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\n8L3Z.exe"C:\Users\Admin\AppData\Local\Temp\n8L3Z.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1348 -
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ainJbd" /XML "C:\Users\Admin\AppData\Local\Temp\tmp499E.tmp"2⤵
- Creates scheduled task(s)
PID:1132 -
C:\Users\Admin\AppData\Local\Temp\n8L3Z.exe"C:\Users\Admin\AppData\Local\Temp\n8L3Z.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:108
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\tmp499E.tmpMD5
bba3164f72efb51a16a78f40d17ef115
SHA12d6a3b03174bd0771ec0b4856010436d9e965d29
SHA25626629ec3859d4b8ef92ad79b6acf833b4b8115ffa244e590130b24d4a5450cf2
SHA5127ffb600c333f5b646c6b60a4dda4f6891d936f09da01f68279be6b0b832b2dca5a0b587a1ef3d51aa0dacd2839bc2f5e9de51edb3a32eff05762ffcc439c45db
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memory/108-68-0x0000000000400000-0x000000000043C000-memory.dmpFilesize
240KB
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memory/108-69-0x000000000043749E-mapping.dmp
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memory/108-70-0x0000000000400000-0x000000000043C000-memory.dmpFilesize
240KB
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memory/108-72-0x0000000004970000-0x0000000004971000-memory.dmpFilesize
4KB
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memory/1132-66-0x0000000000000000-mapping.dmp
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memory/1348-60-0x0000000001120000-0x0000000001121000-memory.dmpFilesize
4KB
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memory/1348-62-0x0000000004D90000-0x0000000004D91000-memory.dmpFilesize
4KB
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memory/1348-63-0x0000000000990000-0x0000000000999000-memory.dmpFilesize
36KB
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memory/1348-64-0x00000000051E0000-0x0000000005260000-memory.dmpFilesize
512KB
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memory/1348-65-0x0000000004D00000-0x0000000004D47000-memory.dmpFilesize
284KB