agenttesla | dccf76439fbd7e0afbaf8b56edda49b8a842c4b9447a9ebcf71874a622abe2c8

Analysis

max time kernel
64s
max time network
126s
platform
windows10_x64
resource
win10v20201028
submitted
09/11/2020, 19:37

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General

Target
SOA_JAN_MAY_20_doc.exe
Size 500KB
Sample201109-ffxva4yn2a
SHA256 dccf76439fbd7e0afbaf8b56edda49b8a842c4b9447a9ebcf71874a622abe2c8
MD5 2e1a3f171e9adfb0cbd28a59a72409e3
SHA1 5a2b23a48bc746f333663baffbe9b8e166a72008
SHA512 91da04f3ff9f893e1d4fe7f1475ab525d5b75bc021d3d6ce746b94988ae246a0970d6841be1b6fe8f7c4cd79bc6215d10547c4b02158630a2f8c6a1412a1a057
MD5 SHA1 SHA512

Score

10^/10

agenttesla coreentity evasion keylogger rezer0 spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
mail.pptoursperu.com
Port
587
Username
[email protected]
Password
mailppt2019-

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/3160-6-0x00000000049E0000-0x00000000049E3000-memory.dmp	coreentity

AgentTesla Payload 16 IoCs

resource	yara_rule
behavioral2/memory/3488-9-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral2/memory/3488-10-0x000000000044ABAE-mapping.dmp	family_agenttesla
behavioral2/memory/3488-21-0x000000000044ABAE-mapping.dmp	family_agenttesla
behavioral2/memory/3488-22-0x000000000044ABAE-mapping.dmp	family_agenttesla
behavioral2/memory/3488-23-0x000000000044ABAE-mapping.dmp	family_agenttesla
behavioral2/memory/3488-24-0x000000000044ABAE-mapping.dmp	family_agenttesla
behavioral2/memory/3488-25-0x000000000044ABAE-mapping.dmp	family_agenttesla
behavioral2/memory/3488-26-0x000000000044ABAE-mapping.dmp	family_agenttesla
behavioral2/memory/3488-28-0x000000000044ABAE-mapping.dmp	family_agenttesla
behavioral2/memory/3488-27-0x000000000044ABAE-mapping.dmp	family_agenttesla
behavioral2/memory/3488-30-0x000000000044ABAE-mapping.dmp	family_agenttesla
behavioral2/memory/3488-29-0x000000000044ABAE-mapping.dmp	family_agenttesla
behavioral2/memory/3488-31-0x000000000044ABAE-mapping.dmp	family_agenttesla
behavioral2/memory/3488-32-0x000000000044ABAE-mapping.dmp	family_agenttesla
behavioral2/memory/3488-33-0x000000000044ABAE-mapping.dmp	family_agenttesla
behavioral2/memory/3488-34-0x000000000044ABAE-mapping.dmp	family_agenttesla

rezer0 1 IoCs

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

rezer0

resource	yara_rule
behavioral2/memory/3160-7-0x000000000A950000-0x000000000A9A1000-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 3160 set thread context of 3488	3160	SOA_JAN_MAY_20_doc.exe	75

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3124	3488	WerFault.exe	75

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
2072	REG.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
3488	RegSvcs.exe
3488	RegSvcs.exe
3124	WerFault.exe
3124	WerFault.exe
3124	WerFault.exe
3124	WerFault.exe
3124	WerFault.exe
3124	WerFault.exe
3124	WerFault.exe
3124	WerFault.exe
3124	WerFault.exe
3124	WerFault.exe
3124	WerFault.exe
3124	WerFault.exe
3124	WerFault.exe
3124	WerFault.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3160	SOA_JAN_MAY_20_doc.exe
Token: SeDebugPrivilege	3488	RegSvcs.exe
Token: SeRestorePrivilege	3124	WerFault.exe
Token: SeBackupPrivilege	3124	WerFault.exe
Token: SeDebugPrivilege	3124	WerFault.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3160	SOA_JAN_MAY_20_doc.exe
3160	SOA_JAN_MAY_20_doc.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3160 wrote to memory of 3488	3160	SOA_JAN_MAY_20_doc.exe	75
PID 3160 wrote to memory of 3488	3160	SOA_JAN_MAY_20_doc.exe	75
PID 3160 wrote to memory of 3488	3160	SOA_JAN_MAY_20_doc.exe	75
PID 3160 wrote to memory of 3488	3160	SOA_JAN_MAY_20_doc.exe	75
PID 3160 wrote to memory of 3488	3160	SOA_JAN_MAY_20_doc.exe	75
PID 3160 wrote to memory of 3488	3160	SOA_JAN_MAY_20_doc.exe	75
PID 3160 wrote to memory of 3488	3160	SOA_JAN_MAY_20_doc.exe	75
PID 3160 wrote to memory of 3488	3160	SOA_JAN_MAY_20_doc.exe	75
PID 3488 wrote to memory of 2072	3488	RegSvcs.exe	79
PID 3488 wrote to memory of 2072	3488	RegSvcs.exe	79
PID 3488 wrote to memory of 2072	3488	RegSvcs.exe	79
PID 3488 wrote to memory of 2112	3488	RegSvcs.exe	81
PID 3488 wrote to memory of 2112	3488	RegSvcs.exe	81
PID 3488 wrote to memory of 2112	3488	RegSvcs.exe	81

C:\Users\Admin\AppData\Local\Temp\SOA_JAN_MAY_20_doc.exe
"C:\Users\Admin\AppData\Local\Temp\SOA_JAN_MAY_20_doc.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3160
- 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:3488
- - 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:2072
- - C:\Windows\SysWOW64\netsh.exe
    "netsh" wlan show profile
    3⤵
    PID:2112
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3488 -s 1516
    3⤵
    - Program crash
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3124

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/3124-36-0x00000000050E0000-0x00000000050E1000-memory.dmp

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memory/3124-20-0x00000000049B0000-0x00000000049B1000-memory.dmp

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memory/3160-8-0x000000000ABA0000-0x000000000ABA1000-memory.dmp

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memory/3160-5-0x00000000074B0000-0x00000000074B1000-memory.dmp

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memory/3160-7-0x000000000A950000-0x000000000A9A1000-memory.dmp

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memory/3160-0-0x00000000733D0000-0x0000000073ABE000-memory.dmp

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memory/3160-1-0x00000000005E0000-0x00000000005E1000-memory.dmp

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memory/3160-6-0x00000000049E0000-0x00000000049E3000-memory.dmp

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memory/3160-3-0x00000000078E0000-0x00000000078E1000-memory.dmp

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memory/3160-4-0x00000000074C0000-0x00000000074C1000-memory.dmp

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memory/3488-16-0x0000000005850000-0x0000000005851000-memory.dmp

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memory/3488-11-0x00000000733D0000-0x0000000073ABE000-memory.dmp

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memory/3488-17-0x00000000064B0000-0x00000000064B1000-memory.dmp

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memory/3488-9-0x0000000000400000-0x0000000000450000-memory.dmp

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