agenttesla | e37dfd22eb88db0869e3629b579abd3f14c6cdaae221e84aa97be7c094753c70

General

Target

overdue account letter.PDF.exe
Size

461KB
MD5

1319cf2f252ccac65fc3d468b487593d
SHA1

ba35e5badeaac9233605ca750849dd3ee324413a
SHA256

0843dfe5e6b3266770393c129939c4fc85db09ee36dd51696fbc711a3b556460
SHA512

025a7cb074dbb315bb9e3366cd71a1cced563a8e17143d1cdc51d20eeb0a73d374fbc1f5f044eba2edc111a2c1970654060b55f6c1c09b8331ca9e887e4561bb

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:
[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/2036-63-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/2036-64-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/2036-65-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/2036-66-0x000000000044CF5E-mapping.dmp	family_agenttesla
behavioral1/memory/2036-68-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/2036-70-0x0000000000400000-0x0000000000452000-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/1564-57-0x0000000004E00000-0x0000000004E58000-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-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\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-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\Run\CpSnJ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\CpSnJ\\CpSnJ.exe"	RegSvcs.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

overdue account letter.PDF.exe

description pid process target process

PID 1564 set thread context of 2036 1564 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

836 schtasks.exe
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

REG.exe

pid process

1404 REG.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

overdue account letter.PDF.exeRegSvcs.exe

pid process

1564 overdue account letter.PDF.exe
2036 RegSvcs.exe
2036 RegSvcs.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

overdue account letter.PDF.exeRegSvcs.exe

description pid process

Token: SeDebugPrivilege 1564 overdue account letter.PDF.exe
Token: SeDebugPrivilege 2036 RegSvcs.exe

description	pid	process	target process
PID 1564 set thread context of 2036	1564	overdue account letter.PDF.exe	RegSvcs.exe

pid	process
836	schtasks.exe

pid	process
1404	REG.exe

pid	process
1564	overdue account letter.PDF.exe
2036	RegSvcs.exe
2036	RegSvcs.exe

description	pid	process
Token: SeDebugPrivilege	1564	overdue account letter.PDF.exe
Token: SeDebugPrivilege	2036	RegSvcs.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

overdue account letter.PDF.exeRegSvcs.exe

description	pid	process	target process
PID 1564 wrote to memory of 836	1564	overdue account letter.PDF.exe	schtasks.exe
PID 1564 wrote to memory of 836	1564	overdue account letter.PDF.exe	schtasks.exe
PID 1564 wrote to memory of 836	1564	overdue account letter.PDF.exe	schtasks.exe
PID 1564 wrote to memory of 836	1564	overdue account letter.PDF.exe	schtasks.exe
PID 1564 wrote to memory of 2036	1564	overdue account letter.PDF.exe	RegSvcs.exe
PID 1564 wrote to memory of 2036	1564	overdue account letter.PDF.exe	RegSvcs.exe
PID 1564 wrote to memory of 2036	1564	overdue account letter.PDF.exe	RegSvcs.exe
PID 1564 wrote to memory of 2036	1564	overdue account letter.PDF.exe	RegSvcs.exe
PID 1564 wrote to memory of 2036	1564	overdue account letter.PDF.exe	RegSvcs.exe
PID 1564 wrote to memory of 2036	1564	overdue account letter.PDF.exe	RegSvcs.exe
PID 1564 wrote to memory of 2036	1564	overdue account letter.PDF.exe	RegSvcs.exe
PID 1564 wrote to memory of 2036	1564	overdue account letter.PDF.exe	RegSvcs.exe
PID 1564 wrote to memory of 2036	1564	overdue account letter.PDF.exe	RegSvcs.exe
PID 1564 wrote to memory of 2036	1564	overdue account letter.PDF.exe	RegSvcs.exe
PID 1564 wrote to memory of 2036	1564	overdue account letter.PDF.exe	RegSvcs.exe
PID 1564 wrote to memory of 2036	1564	overdue account letter.PDF.exe	RegSvcs.exe
PID 2036 wrote to memory of 1404	2036	RegSvcs.exe	REG.exe
PID 2036 wrote to memory of 1404	2036	RegSvcs.exe	REG.exe
PID 2036 wrote to memory of 1404	2036	RegSvcs.exe	REG.exe
PID 2036 wrote to memory of 1404	2036	RegSvcs.exe	REG.exe
PID 2036 wrote to memory of 1952	2036	RegSvcs.exe	netsh.exe
PID 2036 wrote to memory of 1952	2036	RegSvcs.exe	netsh.exe
PID 2036 wrote to memory of 1952	2036	RegSvcs.exe	netsh.exe
PID 2036 wrote to memory of 1952	2036	RegSvcs.exe	netsh.exe

outlook_office_path 1 IoCs

Processes:

RegSvcs.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\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-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe

C:\Users\Admin\AppData\Local\Temp\overdue account letter.PDF.exe
"C:\Users\Admin\AppData\Local\Temp\overdue account letter.PDF.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1564

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\AxUultNdoS" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD950.tmp"
2⤵
- Creates scheduled task(s)
PID:836

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:2036

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:1404

C:\Windows\SysWOW64\netsh.exe
"netsh" wlan show profile
3⤵
PID:1952

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

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpD950.tmp

Filesize
1KB

MD5
6203495c821c8fda9ef9583a2ddeed6f

SHA1
8afc16d13b22a32e9672d04bd48326627be39645

SHA256
fcf6e2b67b10abc688b501cd74e1519229facd1eb2d8a471e0fed56d7f132396

SHA512
9ebcff27c329a3d289586d1c995117755a91a3fbfe63489bf5233dc5e3164f1c1ea8fbbf893573c5dfb80caf340afdf56220fd1dfa83714549fde4b1d18f29b9

Download Submit
memory/836-58-0x0000000000000000-mapping.dmp

Download
memory/1404-72-0x0000000000000000-mapping.dmp

Download
memory/1564-54-0x0000000000990000-0x0000000000A0A000-memory.dmp

Filesize
488KB

Download
memory/1564-55-0x00000000763B1000-0x00000000763B3000-memory.dmp

Filesize
8KB

Download
memory/1564-56-0x0000000000670000-0x0000000000678000-memory.dmp

Filesize
32KB

Download
memory/1564-57-0x0000000004E00000-0x0000000004E58000-memory.dmp

Filesize
352KB

Download
memory/1952-73-0x0000000000000000-mapping.dmp

Download
memory/2036-63-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/2036-64-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/2036-65-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/2036-66-0x000000000044CF5E-mapping.dmp

Download
memory/2036-68-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/2036-70-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/2036-61-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/2036-60-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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