agenttesla | 4a2c1f3c1df5c34f1c99c8f7cc8b18fae2c71189e6e383face3ff7fa31224f52

General

Target

opo.exe
Size

528KB
MD5

2d518011d53c1cbb00a23a53e259aa08
SHA1

0e846cf62a46c5e90c0d4bd62214b76c068196e1
SHA256

4a2c1f3c1df5c34f1c99c8f7cc8b18fae2c71189e6e383face3ff7fa31224f52
SHA512

853cf293a0f8972de34c88df10ee41d2e678f8ff141d73678f0758c448885be57d5facab9169ea1c4f169b978fb3b671c7416519001b7b4f263ff60ca2997a58

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:
parag.bapodara@ahd.cpworldindia.com
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

Processes:

resource	yara_rule
behavioral2/memory/728-14-0x0000000002A10000-0x0000000002A13000-memory.dmp	coreentity

AgentTesla Payload 13 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1952-17-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral2/memory/1952-18-0x000000000044CEEE-mapping.dmp	family_agenttesla
behavioral2/memory/1952-28-0x000000000044CEEE-mapping.dmp	family_agenttesla
behavioral2/memory/1952-29-0x000000000044CEEE-mapping.dmp	family_agenttesla
behavioral2/memory/1952-30-0x000000000044CEEE-mapping.dmp	family_agenttesla
behavioral2/memory/1952-31-0x000000000044CEEE-mapping.dmp	family_agenttesla
behavioral2/memory/1952-33-0x000000000044CEEE-mapping.dmp	family_agenttesla
behavioral2/memory/1952-34-0x000000000044CEEE-mapping.dmp	family_agenttesla
behavioral2/memory/1952-35-0x000000000044CEEE-mapping.dmp	family_agenttesla
behavioral2/memory/1952-37-0x000000000044CEEE-mapping.dmp	family_agenttesla
behavioral2/memory/1952-38-0x000000000044CEEE-mapping.dmp	family_agenttesla
behavioral2/memory/1952-36-0x000000000044CEEE-mapping.dmp	family_agenttesla
behavioral2/memory/1952-32-0x000000000044CEEE-mapping.dmp	family_agenttesla

rezer0 1 IoCs

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

rezer0

Processes:

resource	yara_rule
behavioral2/memory/728-15-0x000000000ABE0000-0x000000000AC33000-memory.dmp	rezer0

Disables Task Manager via registry modification
evasion
Drops file in Drivers directory 1 IoCs

Processes:

RegSvcs.exe

description ioc process

File opened for modification C:\Windows\system32\drivers\etc\hosts RegSvcs.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

opo.exe

description pid process target process

PID 728 set thread context of 1952 728 opo.exe RegSvcs.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

2272 1952 WerFault.exe RegSvcs.exe
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

REG.exe

pid process

4020 REG.exe

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

description	pid	process	target process
PID 728 set thread context of 1952	728	opo.exe	RegSvcs.exe

pid	pid_target	process	target process
2272	1952	WerFault.exe	RegSvcs.exe

pid	process
4020	REG.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

Processes:

RegSvcs.exeWerFault.exe

pid	process
1952	RegSvcs.exe
1952	RegSvcs.exe
2272	WerFault.exe
2272	WerFault.exe
2272	WerFault.exe
2272	WerFault.exe
2272	WerFault.exe
2272	WerFault.exe
2272	WerFault.exe
2272	WerFault.exe
2272	WerFault.exe
2272	WerFault.exe
2272	WerFault.exe
2272	WerFault.exe
2272	WerFault.exe
2272	WerFault.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

opo.exeRegSvcs.exeWerFault.exe

description	pid	process
Token: SeDebugPrivilege	728	opo.exe
Token: SeDebugPrivilege	1952	RegSvcs.exe
Token: SeRestorePrivilege	2272	WerFault.exe
Token: SeBackupPrivilege	2272	WerFault.exe
Token: SeDebugPrivilege	2272	WerFault.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

opo.exe

pid process

728 opo.exe
728 opo.exe

pid	process
728	opo.exe
728	opo.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

opo.exeRegSvcs.exe

description	pid	process	target process
PID 728 wrote to memory of 1952	728	opo.exe	RegSvcs.exe
PID 728 wrote to memory of 1952	728	opo.exe	RegSvcs.exe
PID 728 wrote to memory of 1952	728	opo.exe	RegSvcs.exe
PID 728 wrote to memory of 1952	728	opo.exe	RegSvcs.exe
PID 728 wrote to memory of 1952	728	opo.exe	RegSvcs.exe
PID 728 wrote to memory of 1952	728	opo.exe	RegSvcs.exe
PID 728 wrote to memory of 1952	728	opo.exe	RegSvcs.exe
PID 728 wrote to memory of 1952	728	opo.exe	RegSvcs.exe
PID 1952 wrote to memory of 4020	1952	RegSvcs.exe	REG.exe
PID 1952 wrote to memory of 4020	1952	RegSvcs.exe	REG.exe
PID 1952 wrote to memory of 4020	1952	RegSvcs.exe	REG.exe

C:\Users\Admin\AppData\Local\Temp\opo.exe
"C:\Users\Admin\AppData\Local\Temp\opo.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:728

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:1952

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:4020

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1952 -s 1460
3⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2272

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/728-0-0x0000000073EE0000-0x00000000745CE000-memory.dmp

Filesize
6.9MB

Download
memory/728-1-0x0000000000770000-0x0000000000771000-memory.dmp

Filesize
4KB

Download
memory/728-3-0x0000000007A00000-0x0000000007A01000-memory.dmp

Filesize
4KB

Download
memory/728-4-0x00000000075A0000-0x00000000075A1000-memory.dmp

Filesize
4KB

Download
memory/728-5-0x0000000007500000-0x0000000007501000-memory.dmp

Filesize
4KB

Download
memory/728-14-0x0000000002A10000-0x0000000002A13000-memory.dmp

Filesize
12KB

Download
memory/728-15-0x000000000ABE0000-0x000000000AC33000-memory.dmp

Filesize
332KB

Download
memory/728-16-0x000000000ACE0000-0x000000000ACE1000-memory.dmp

Filesize
4KB

Download
memory/1952-25-0x0000000005C50000-0x0000000005C51000-memory.dmp

Filesize
4KB

Download
memory/1952-35-0x000000000044CEEE-mapping.dmp

Download
memory/1952-19-0x0000000073EE0000-0x00000000745CE000-memory.dmp

Filesize
6.9MB

Download
memory/1952-24-0x0000000005030000-0x0000000005031000-memory.dmp

Filesize
4KB

Download
memory/1952-17-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1952-32-0x000000000044CEEE-mapping.dmp

Download
memory/1952-36-0x000000000044CEEE-mapping.dmp

Download
memory/1952-28-0x000000000044CEEE-mapping.dmp

Download
memory/1952-29-0x000000000044CEEE-mapping.dmp

Download
memory/1952-30-0x000000000044CEEE-mapping.dmp

Download
memory/1952-31-0x000000000044CEEE-mapping.dmp

Download
memory/1952-33-0x000000000044CEEE-mapping.dmp

Download
memory/1952-34-0x000000000044CEEE-mapping.dmp

Download
memory/1952-18-0x000000000044CEEE-mapping.dmp

Download
memory/1952-37-0x000000000044CEEE-mapping.dmp

Download
memory/1952-38-0x000000000044CEEE-mapping.dmp

Download
memory/2272-27-0x0000000004AC0000-0x0000000004AC1000-memory.dmp

Filesize
4KB

Download
memory/2272-39-0x00000000052F0000-0x00000000052F1000-memory.dmp

Filesize
4KB

Download
memory/4020-26-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads