agenttesla | 4e9235c8c805d240c9aa6a7731214e0e2d658588aecf543e334b3c9559260f25

General

Target

DHL_overdue account letter.PDF.exe
Size

424KB
MD5

f0b3e2a7cef0d4e0c6e094676550221a
SHA1

fc8cddcf6526cd3ee94141b6299c7069ad1b19b0
SHA256

6ae9b8c271b5110c7cceb8b7d39522dd8d444dddcfa3691726ff3580562a73b7
SHA512

3a0f6d6e979871ecdf4cce66e63674ecd32568f0d45f91448b0bb986fccbbf3173734f992d6c0add58c5437fd048e36c4b00bd8efcbcf5c161b35b8c7e26178a

Score

10^/10

agenttesla collection evasion keylogger persistence rezer0 spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.microtechlab.in
Port:
587
Username:
reports@microtechlab.in
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/1632-63-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/1632-64-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/1632-65-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/1632-66-0x000000000044CF5E-mapping.dmp	family_agenttesla
behavioral1/memory/1632-68-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/1632-70-0x0000000000400000-0x0000000000452000-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/1992-56-0x0000000000B80000-0x0000000000BD8000-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

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

RegSvcs.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	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:

DHL_overdue account letter.PDF.exe

description pid process target process

PID 1992 set thread context of 1632 1992 DHL_overdue account letter.PDF.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

1820 schtasks.exe
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

REG.exe

pid process

892 REG.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

DHL_overdue account letter.PDF.exeRegSvcs.exe

pid process

1992 DHL_overdue account letter.PDF.exe
1632 RegSvcs.exe
1632 RegSvcs.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

DHL_overdue account letter.PDF.exeRegSvcs.exe

description pid process

Token: SeDebugPrivilege 1992 DHL_overdue account letter.PDF.exe
Token: SeDebugPrivilege 1632 RegSvcs.exe

description	pid	process	target process
PID 1992 set thread context of 1632	1992	DHL_overdue account letter.PDF.exe	RegSvcs.exe

pid	process
1820	schtasks.exe

pid	process
892	REG.exe

pid	process
1992	DHL_overdue account letter.PDF.exe
1632	RegSvcs.exe
1632	RegSvcs.exe

description	pid	process
Token: SeDebugPrivilege	1992	DHL_overdue account letter.PDF.exe
Token: SeDebugPrivilege	1632	RegSvcs.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

DHL_overdue account letter.PDF.exeRegSvcs.exe

description	pid	process	target process
PID 1992 wrote to memory of 1820	1992	DHL_overdue account letter.PDF.exe	schtasks.exe
PID 1992 wrote to memory of 1820	1992	DHL_overdue account letter.PDF.exe	schtasks.exe
PID 1992 wrote to memory of 1820	1992	DHL_overdue account letter.PDF.exe	schtasks.exe
PID 1992 wrote to memory of 1820	1992	DHL_overdue account letter.PDF.exe	schtasks.exe
PID 1992 wrote to memory of 1632	1992	DHL_overdue account letter.PDF.exe	RegSvcs.exe
PID 1992 wrote to memory of 1632	1992	DHL_overdue account letter.PDF.exe	RegSvcs.exe
PID 1992 wrote to memory of 1632	1992	DHL_overdue account letter.PDF.exe	RegSvcs.exe
PID 1992 wrote to memory of 1632	1992	DHL_overdue account letter.PDF.exe	RegSvcs.exe
PID 1992 wrote to memory of 1632	1992	DHL_overdue account letter.PDF.exe	RegSvcs.exe
PID 1992 wrote to memory of 1632	1992	DHL_overdue account letter.PDF.exe	RegSvcs.exe
PID 1992 wrote to memory of 1632	1992	DHL_overdue account letter.PDF.exe	RegSvcs.exe
PID 1992 wrote to memory of 1632	1992	DHL_overdue account letter.PDF.exe	RegSvcs.exe
PID 1992 wrote to memory of 1632	1992	DHL_overdue account letter.PDF.exe	RegSvcs.exe
PID 1992 wrote to memory of 1632	1992	DHL_overdue account letter.PDF.exe	RegSvcs.exe
PID 1992 wrote to memory of 1632	1992	DHL_overdue account letter.PDF.exe	RegSvcs.exe
PID 1992 wrote to memory of 1632	1992	DHL_overdue account letter.PDF.exe	RegSvcs.exe
PID 1632 wrote to memory of 892	1632	RegSvcs.exe	REG.exe
PID 1632 wrote to memory of 892	1632	RegSvcs.exe	REG.exe
PID 1632 wrote to memory of 892	1632	RegSvcs.exe	REG.exe
PID 1632 wrote to memory of 892	1632	RegSvcs.exe	REG.exe
PID 1632 wrote to memory of 1596	1632	RegSvcs.exe	netsh.exe
PID 1632 wrote to memory of 1596	1632	RegSvcs.exe	netsh.exe
PID 1632 wrote to memory of 1596	1632	RegSvcs.exe	netsh.exe
PID 1632 wrote to memory of 1596	1632	RegSvcs.exe	netsh.exe

outlook_office_path 1 IoCs

Processes:

RegSvcs.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe

outlook_win_path 1 IoCs

Processes:

RegSvcs.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe

C:\Users\Admin\AppData\Local\Temp\DHL_overdue account letter.PDF.exe
"C:\Users\Admin\AppData\Local\Temp\DHL_overdue account letter.PDF.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1992

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\eigBEJpNrvdNDs" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8B5F.tmp"
2⤵
- Creates scheduled task(s)
PID:1820

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
"{path}"
2⤵
- Drops file in Drivers directory
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
PID:1632

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:892

C:\Windows\SysWOW64\netsh.exe
"netsh" wlan show profile
3⤵
PID:1596

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp8B5F.tmp
Filesize
1KB

MD5
5c8b4f321a27b321771ffe86a65e4c13

SHA1
d0bab6ebb3586c98ca796811592fc7417a0231ac

SHA256
3abd5952b758d40d2328e9c4d70333a9eb060f0015510d4b360d71d40d630be0

SHA512
a77c1ee60fb81372c394cca297b239e12165e8334da5525ac853a8b7c221929d0fd3b6648b595bba719d201fc02bfc4a528df6e310158fdb1a91be4b26bb45a8

Download Submit
memory/892-72-0x0000000000000000-mapping.dmp

Download
memory/1596-73-0x0000000000000000-mapping.dmp

Download
memory/1632-68-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1632-60-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1632-61-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1632-63-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1632-64-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1632-65-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1632-66-0x000000000044CF5E-mapping.dmp

Download
memory/1632-70-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1820-58-0x0000000000000000-mapping.dmp

Download
memory/1992-57-0x00000000751C1000-0x00000000751C3000-memory.dmp

Filesize
8KB

Download
memory/1992-54-0x00000000012A0000-0x0000000001310000-memory.dmp

Filesize
448KB

Download
memory/1992-56-0x0000000000B80000-0x0000000000BD8000-memory.dmp

Filesize
352KB

Download
memory/1992-55-0x0000000000260000-0x0000000000268000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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