agenttesla | d6e07496dd8f9f3544f88e712a2df41dd82dc68f1c6a802403bfc71e81431527

General

Target

PENDING INVOICE.exe
Size

433KB
MD5

9bc66f36baedd02eb6b55e391d90b324
SHA1

aaa6786ed70237361fb28250da350181d0fd28fe
SHA256

4b1a13f1b1a0bff19df63d1ebf93a2c1c390896b77db3b724a2e5c03f6007d81
SHA512

027dbf3d56939ad0d7f4bae865863e9da23d3be4278b2e7a257b8c08b135390322b298c4bece43cda407c6eeec07c4f41a5d5b72bcee4018c65b6530aa3f462e

Score

10^/10

agenttesla evasion keylogger persistence rezer0 spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.microtechlab.in
Port:
587
Username:
[email protected]
Password:
pune@123

Signatures

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

AgentTesla Payload 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/668-63-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/668-64-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/668-66-0x000000000044CF5E-mapping.dmp	family_agenttesla
behavioral1/memory/668-65-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/668-68-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/668-70-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla

ReZer0 packer 1 IoCs

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

rezer0

Processes:

resource	yara_rule
behavioral1/memory/1976-56-0x00000000051B0000-0x0000000005208000-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

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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

RegSvcs.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows\CurrentVersion\Run\CpSnJ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\CpSnJ\\CpSnJ.exe"	RegSvcs.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

PENDING INVOICE.exe

description pid process target process

PID 1976 set thread context of 668 1976 PENDING INVOICE.exe RegSvcs.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

2008 schtasks.exe
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

REG.exe

pid process

1460 REG.exe
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

PENDING INVOICE.exeRegSvcs.exe

pid process

1976 PENDING INVOICE.exe
1976 PENDING INVOICE.exe
1976 PENDING INVOICE.exe
668 RegSvcs.exe
668 RegSvcs.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

PENDING INVOICE.exeRegSvcs.exe

description pid process

Token: SeDebugPrivilege 1976 PENDING INVOICE.exe
Token: SeDebugPrivilege 668 RegSvcs.exe

description	pid	process	target process
PID 1976 set thread context of 668	1976	PENDING INVOICE.exe	RegSvcs.exe

pid	process
2008	schtasks.exe

pid	process
1460	REG.exe

pid	process
1976	PENDING INVOICE.exe
1976	PENDING INVOICE.exe
1976	PENDING INVOICE.exe
668	RegSvcs.exe
668	RegSvcs.exe

description	pid	process
Token: SeDebugPrivilege	1976	PENDING INVOICE.exe
Token: SeDebugPrivilege	668	RegSvcs.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

PENDING INVOICE.exeRegSvcs.exe

description	pid	process	target process
PID 1976 wrote to memory of 2008	1976	PENDING INVOICE.exe	schtasks.exe
PID 1976 wrote to memory of 2008	1976	PENDING INVOICE.exe	schtasks.exe
PID 1976 wrote to memory of 2008	1976	PENDING INVOICE.exe	schtasks.exe
PID 1976 wrote to memory of 2008	1976	PENDING INVOICE.exe	schtasks.exe
PID 1976 wrote to memory of 668	1976	PENDING INVOICE.exe	RegSvcs.exe
PID 1976 wrote to memory of 668	1976	PENDING INVOICE.exe	RegSvcs.exe
PID 1976 wrote to memory of 668	1976	PENDING INVOICE.exe	RegSvcs.exe
PID 1976 wrote to memory of 668	1976	PENDING INVOICE.exe	RegSvcs.exe
PID 1976 wrote to memory of 668	1976	PENDING INVOICE.exe	RegSvcs.exe
PID 1976 wrote to memory of 668	1976	PENDING INVOICE.exe	RegSvcs.exe
PID 1976 wrote to memory of 668	1976	PENDING INVOICE.exe	RegSvcs.exe
PID 1976 wrote to memory of 668	1976	PENDING INVOICE.exe	RegSvcs.exe
PID 1976 wrote to memory of 668	1976	PENDING INVOICE.exe	RegSvcs.exe
PID 1976 wrote to memory of 668	1976	PENDING INVOICE.exe	RegSvcs.exe
PID 1976 wrote to memory of 668	1976	PENDING INVOICE.exe	RegSvcs.exe
PID 1976 wrote to memory of 668	1976	PENDING INVOICE.exe	RegSvcs.exe
PID 668 wrote to memory of 1460	668	RegSvcs.exe	REG.exe
PID 668 wrote to memory of 1460	668	RegSvcs.exe	REG.exe
PID 668 wrote to memory of 1460	668	RegSvcs.exe	REG.exe
PID 668 wrote to memory of 1460	668	RegSvcs.exe	REG.exe

C:\Users\Admin\AppData\Local\Temp\PENDING INVOICE.exe
"C:\Users\Admin\AppData\Local\Temp\PENDING INVOICE.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1976

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\myhqZugPIlg" /XML "C:\Users\Admin\AppData\Local\Temp\tmp911A.tmp"
2⤵
- Creates scheduled task(s)
PID:2008

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
"{path}"
2⤵
- Drops file in Drivers directory
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:668

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:1460

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

Scheduled Task

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp911A.tmp

Filesize
1KB

MD5
5dcbc358f4609c4574750ec03c2cc3ea

SHA1
d445962af7454d53a24431908921b918f7f179dc

SHA256
49a20466209313fccd747142a9a8b43cb43f57dfc706a73a6d23be115cc913df

SHA512
3510d4bce3064700ce2858f71b4fb2f6d5687c48f5d76dbc1fd3697f1454f0b1bb0ac3f22d3c51f1792a28f59ff2408fcf9f35bbb0a3358d1105cef0e7910886

Download Submit
memory/668-64-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/668-65-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/668-70-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/668-68-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/668-66-0x000000000044CF5E-mapping.dmp

Download
memory/668-60-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/668-61-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/668-63-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1460-72-0x0000000000000000-mapping.dmp

Download
memory/1976-54-0x0000000000BB0000-0x0000000000C22000-memory.dmp

Filesize
456KB

Download
memory/1976-55-0x0000000000510000-0x0000000000518000-memory.dmp

Filesize
32KB

Download
memory/1976-56-0x00000000051B0000-0x0000000005208000-memory.dmp

Filesize
352KB

Download
memory/1976-57-0x0000000076851000-0x0000000076853000-memory.dmp

Filesize
8KB

Download
memory/2008-58-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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