agenttesla | f35fa2a6281a2a24016729d315083a638edf176a890a605dba2ac134e1733bb3

Analysis

max time kernel
119s
max time network
122s
platform
windows10_x64
resource
win10v20201028
submitted
09/11/2020, 19:38

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General

Target
opo (1).exe
Size 500KB
Sample201109-1ed8ncwlyx
SHA256 f35fa2a6281a2a24016729d315083a638edf176a890a605dba2ac134e1733bb3
MD5 6f366f6932afabce27a09613f221fe7d
SHA1 4795261b97ca244bef5a007e2bcce74350a091eb
SHA512 8d063bb927760a9b3ad435162b3b97f0ccd824e6aaa96e97baa71460b29ae12388399138a0862e79d5754f1056e2e8ee5cd09ec91d02fdc3ee8578ca089ac651
MD5 SHA1 SHA512

Score

10^/10

agenttesla coreentity evasion keylogger rezer0 spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
mail.cpworldindia.com
Port
587
Username
[email protected]
Password
bopo@2014

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/648-7-0x0000000002710000-0x0000000002713000-memory.dmp	coreentity

AgentTesla Payload 13 IoCs

resource	yara_rule
behavioral2/memory/508-10-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral2/memory/508-11-0x000000000044CEEE-mapping.dmp	family_agenttesla
behavioral2/memory/508-21-0x000000000044CEEE-mapping.dmp	family_agenttesla
behavioral2/memory/508-22-0x000000000044CEEE-mapping.dmp	family_agenttesla
behavioral2/memory/508-23-0x000000000044CEEE-mapping.dmp	family_agenttesla
behavioral2/memory/508-24-0x000000000044CEEE-mapping.dmp	family_agenttesla
behavioral2/memory/508-25-0x000000000044CEEE-mapping.dmp	family_agenttesla
behavioral2/memory/508-26-0x000000000044CEEE-mapping.dmp	family_agenttesla
behavioral2/memory/508-27-0x000000000044CEEE-mapping.dmp	family_agenttesla
behavioral2/memory/508-28-0x000000000044CEEE-mapping.dmp	family_agenttesla
behavioral2/memory/508-30-0x000000000044CEEE-mapping.dmp	family_agenttesla
behavioral2/memory/508-31-0x000000000044CEEE-mapping.dmp	family_agenttesla
behavioral2/memory/508-29-0x000000000044CEEE-mapping.dmp	family_agenttesla

rezer0 1 IoCs

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

rezer0

resource	yara_rule
behavioral2/memory/648-8-0x0000000009A90000-0x0000000009AE3000-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 648 set thread context of 508	648	opo (1).exe	75

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2260	508	WerFault.exe	75

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
3000	REG.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
648	opo (1).exe
648	opo (1).exe
648	opo (1).exe
508	RegSvcs.exe
508	RegSvcs.exe
2260	WerFault.exe
2260	WerFault.exe
2260	WerFault.exe
2260	WerFault.exe
2260	WerFault.exe
2260	WerFault.exe
2260	WerFault.exe
2260	WerFault.exe
2260	WerFault.exe
2260	WerFault.exe
2260	WerFault.exe
2260	WerFault.exe
2260	WerFault.exe
2260	WerFault.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	648	opo (1).exe
Token: SeDebugPrivilege	508	RegSvcs.exe
Token: SeRestorePrivilege	2260	WerFault.exe
Token: SeBackupPrivilege	2260	WerFault.exe
Token: SeDebugPrivilege	2260	WerFault.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 648 wrote to memory of 508	648	opo (1).exe	75
PID 648 wrote to memory of 508	648	opo (1).exe	75
PID 648 wrote to memory of 508	648	opo (1).exe	75
PID 648 wrote to memory of 508	648	opo (1).exe	75
PID 648 wrote to memory of 508	648	opo (1).exe	75
PID 648 wrote to memory of 508	648	opo (1).exe	75
PID 648 wrote to memory of 508	648	opo (1).exe	75
PID 648 wrote to memory of 508	648	opo (1).exe	75
PID 508 wrote to memory of 3000	508	RegSvcs.exe	79
PID 508 wrote to memory of 3000	508	RegSvcs.exe	79
PID 508 wrote to memory of 3000	508	RegSvcs.exe	79

C:\Users\Admin\AppData\Local\Temp\opo (1).exe
"C:\Users\Admin\AppData\Local\Temp\opo (1).exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:648
- 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:508
- - 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:3000
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 508 -s 1464
    3⤵
    - Program crash
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2260

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/508-10-0x0000000000400000-0x0000000000452000-memory.dmp

Download

memory/508-12-0x00000000739E0000-0x00000000740CE000-memory.dmp

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memory/508-17-0x0000000005460000-0x0000000005461000-memory.dmp

Download

memory/508-18-0x0000000005FB0000-0x0000000005FB1000-memory.dmp

Download

memory/648-8-0x0000000009A90000-0x0000000009AE3000-memory.dmp

Download

memory/648-9-0x0000000009B90000-0x0000000009B91000-memory.dmp

Download

memory/648-0-0x00000000739E0000-0x00000000740CE000-memory.dmp

Download

memory/648-7-0x0000000002710000-0x0000000002713000-memory.dmp

Download

memory/648-6-0x0000000007630000-0x0000000007631000-memory.dmp

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memory/648-5-0x00000000076D0000-0x00000000076D1000-memory.dmp

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memory/648-4-0x00000000079B0000-0x00000000079B1000-memory.dmp

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memory/648-3-0x0000000004D90000-0x0000000004DEC000-memory.dmp

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memory/648-1-0x0000000000270000-0x0000000000271000-memory.dmp

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memory/2260-20-0x00000000044B0000-0x00000000044B1000-memory.dmp

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memory/2260-32-0x0000000004AF0000-0x0000000004AF1000-memory.dmp

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