agenttesla | a4d3085a47bf0da4fa557e18de19bada74667d0eaa3dca959990b96215bb25cc

Analysis

max time kernel
67s
max time network
132s
platform
windows10_x64
resource
win10v20201028
submitted
09/11/2020, 19:37

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General

Target
new purchase order.rar.exe
Size 523KB
Sample201109-5bejbj3myx
SHA256 a4d3085a47bf0da4fa557e18de19bada74667d0eaa3dca959990b96215bb25cc
MD5 e50b58922768f36a719aa5e91c086c06
SHA1 f2216e02ce43d07bc6bc8b7fb01461f1d9d1aa91
SHA512 ba6be2906587a73203196853952878e017e99ad94edec3195a368edd99f9fb0c2ae3218b84bd943a57f0cdbbd340043c0858b9e050f330dbacdf26b45f32d078
MD5 SHA1 SHA512

Score

10^/10

agenttesla nanocore coreentity evasion keylogger rezer0 spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
mail.villanika.gr
Port
587
Username
[email protected]
Password
n2^-9wE@Wl}t

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla

CoreEntity .NET Packer 1 IoCs

A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.

coreentity

resource	yara_rule
behavioral2/memory/3932-6-0x0000000002E20000-0x0000000002E23000-memory.dmp	coreentity

NanoCore
NanoCore is a remote access tool (RAT) with a variety of capabilities.
keylogger trojan stealer spyware nanocore

AgentTesla Payload 13 IoCs

resource	yara_rule
behavioral2/memory/3976-9-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral2/memory/3976-10-0x000000000044C6EE-mapping.dmp	family_agenttesla
behavioral2/memory/3976-20-0x000000000044C6EE-mapping.dmp	family_agenttesla
behavioral2/memory/3976-22-0x000000000044C6EE-mapping.dmp	family_agenttesla
behavioral2/memory/3976-21-0x000000000044C6EE-mapping.dmp	family_agenttesla
behavioral2/memory/3976-23-0x000000000044C6EE-mapping.dmp	family_agenttesla
behavioral2/memory/3976-25-0x000000000044C6EE-mapping.dmp	family_agenttesla
behavioral2/memory/3976-24-0x000000000044C6EE-mapping.dmp	family_agenttesla
behavioral2/memory/3976-26-0x000000000044C6EE-mapping.dmp	family_agenttesla
behavioral2/memory/3976-27-0x000000000044C6EE-mapping.dmp	family_agenttesla
behavioral2/memory/3976-28-0x000000000044C6EE-mapping.dmp	family_agenttesla
behavioral2/memory/3976-30-0x000000000044C6EE-mapping.dmp	family_agenttesla
behavioral2/memory/3976-29-0x000000000044C6EE-mapping.dmp	family_agenttesla

rezer0 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

resource	yara_rule
behavioral2/memory/3932-7-0x000000000B470000-0x000000000B4C3000-memory.dmp	rezer0

Disables Task Manager via registry modification
evasion

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	RegSvcs.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3932 set thread context of 3976	3932	new purchase order.rar.exe	75

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2064	3976	WerFault.exe	75

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
3128	REG.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
3976	RegSvcs.exe
3976	RegSvcs.exe
2064	WerFault.exe
2064	WerFault.exe
2064	WerFault.exe
2064	WerFault.exe
2064	WerFault.exe
2064	WerFault.exe
2064	WerFault.exe
2064	WerFault.exe
2064	WerFault.exe
2064	WerFault.exe
2064	WerFault.exe
2064	WerFault.exe
2064	WerFault.exe
2064	WerFault.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3932	new purchase order.rar.exe
Token: SeDebugPrivilege	3976	RegSvcs.exe
Token: SeRestorePrivilege	2064	WerFault.exe
Token: SeBackupPrivilege	2064	WerFault.exe
Token: SeDebugPrivilege	2064	WerFault.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3932	new purchase order.rar.exe
3932	new purchase order.rar.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3932 wrote to memory of 3976	3932	new purchase order.rar.exe	75
PID 3932 wrote to memory of 3976	3932	new purchase order.rar.exe	75
PID 3932 wrote to memory of 3976	3932	new purchase order.rar.exe	75
PID 3932 wrote to memory of 3976	3932	new purchase order.rar.exe	75
PID 3932 wrote to memory of 3976	3932	new purchase order.rar.exe	75
PID 3932 wrote to memory of 3976	3932	new purchase order.rar.exe	75
PID 3932 wrote to memory of 3976	3932	new purchase order.rar.exe	75
PID 3932 wrote to memory of 3976	3932	new purchase order.rar.exe	75
PID 3976 wrote to memory of 3128	3976	RegSvcs.exe	79
PID 3976 wrote to memory of 3128	3976	RegSvcs.exe	79
PID 3976 wrote to memory of 3128	3976	RegSvcs.exe	79

C:\Users\Admin\AppData\Local\Temp\new purchase order.rar.exe
"C:\Users\Admin\AppData\Local\Temp\new purchase order.rar.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3932
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "{path}"
  2⤵
  - Drops file in Drivers directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3976
- - C:\Windows\SysWOW64\REG.exe
    REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
    3⤵
    - Modifies registry key
    PID:3128
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3976 -s 1432
    3⤵
    - Program crash
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2064

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2064-31-0x0000000004AD0000-0x0000000004AD1000-memory.dmp

Download

memory/2064-19-0x00000000044A0000-0x00000000044A1000-memory.dmp

Download

memory/3932-0-0x0000000073300000-0x00000000739EE000-memory.dmp

Download

memory/3932-1-0x0000000000C00000-0x0000000000C01000-memory.dmp

Download

memory/3932-3-0x0000000007E40000-0x0000000007E41000-memory.dmp

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memory/3932-4-0x00000000079E0000-0x00000000079E1000-memory.dmp

Download

memory/3932-5-0x00000000079A0000-0x00000000079A1000-memory.dmp

Download

memory/3932-6-0x0000000002E20000-0x0000000002E23000-memory.dmp

Download

memory/3932-7-0x000000000B470000-0x000000000B4C3000-memory.dmp

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memory/3932-8-0x000000000B570000-0x000000000B571000-memory.dmp

Download

memory/3976-17-0x0000000005EB0000-0x0000000005EB1000-memory.dmp

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memory/3976-11-0x0000000073300000-0x00000000739EE000-memory.dmp

Download

memory/3976-16-0x00000000053E0000-0x00000000053E1000-memory.dmp

Download

memory/3976-9-0x0000000000400000-0x0000000000452000-memory.dmp

Download