agenttesla | 4e9235c8c805d240c9aa6a7731214e0e2d658588aecf543e334b3c9559260f25

General

Target

DHL_overdue account letter.PDF.exe
Size

424KB
MD5

f0b3e2a7cef0d4e0c6e094676550221a
SHA1

fc8cddcf6526cd3ee94141b6299c7069ad1b19b0
SHA256

6ae9b8c271b5110c7cceb8b7d39522dd8d444dddcfa3691726ff3580562a73b7
SHA512

3a0f6d6e979871ecdf4cce66e63674ecd32568f0d45f91448b0bb986fccbbf3173734f992d6c0add58c5437fd048e36c4b00bd8efcbcf5c161b35b8c7e26178a

Score

10^/10

agenttesla evasion keylogger persistence 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 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/328-137-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

DHL_overdue account letter.PDF.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	DHL_overdue account letter.PDF.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-1-5-21-1809750270-3141839489-3074374771-1000\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 5104 set thread context of 328 5104 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
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3924 328 WerFault.exe RegSvcs.exe
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

4076 schtasks.exe
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

REG.exe

pid process

3732 REG.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

DHL_overdue account letter.PDF.exeRegSvcs.exe

pid process

5104 DHL_overdue account letter.PDF.exe
328 RegSvcs.exe
328 RegSvcs.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

DHL_overdue account letter.PDF.exeRegSvcs.exe

description pid process

Token: SeDebugPrivilege 5104 DHL_overdue account letter.PDF.exe
Token: SeDebugPrivilege 328 RegSvcs.exe

description	pid	process	target process
PID 5104 set thread context of 328	5104	DHL_overdue account letter.PDF.exe	RegSvcs.exe

pid	pid_target	process	target process
3924	328	WerFault.exe	RegSvcs.exe

pid	process
4076	schtasks.exe

pid	process
3732	REG.exe

pid	process
5104	DHL_overdue account letter.PDF.exe
328	RegSvcs.exe
328	RegSvcs.exe

description	pid	process
Token: SeDebugPrivilege	5104	DHL_overdue account letter.PDF.exe
Token: SeDebugPrivilege	328	RegSvcs.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

DHL_overdue account letter.PDF.exeRegSvcs.exe

description	pid	process	target process
PID 5104 wrote to memory of 4076	5104	DHL_overdue account letter.PDF.exe	schtasks.exe
PID 5104 wrote to memory of 4076	5104	DHL_overdue account letter.PDF.exe	schtasks.exe
PID 5104 wrote to memory of 4076	5104	DHL_overdue account letter.PDF.exe	schtasks.exe
PID 5104 wrote to memory of 328	5104	DHL_overdue account letter.PDF.exe	RegSvcs.exe
PID 5104 wrote to memory of 328	5104	DHL_overdue account letter.PDF.exe	RegSvcs.exe
PID 5104 wrote to memory of 328	5104	DHL_overdue account letter.PDF.exe	RegSvcs.exe
PID 5104 wrote to memory of 328	5104	DHL_overdue account letter.PDF.exe	RegSvcs.exe
PID 5104 wrote to memory of 328	5104	DHL_overdue account letter.PDF.exe	RegSvcs.exe
PID 5104 wrote to memory of 328	5104	DHL_overdue account letter.PDF.exe	RegSvcs.exe
PID 5104 wrote to memory of 328	5104	DHL_overdue account letter.PDF.exe	RegSvcs.exe
PID 5104 wrote to memory of 328	5104	DHL_overdue account letter.PDF.exe	RegSvcs.exe
PID 328 wrote to memory of 3732	328	RegSvcs.exe	REG.exe
PID 328 wrote to memory of 3732	328	RegSvcs.exe	REG.exe
PID 328 wrote to memory of 3732	328	RegSvcs.exe	REG.exe
PID 328 wrote to memory of 4752	328	RegSvcs.exe	netsh.exe
PID 328 wrote to memory of 4752	328	RegSvcs.exe	netsh.exe
PID 328 wrote to memory of 4752	328	RegSvcs.exe	netsh.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⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5104

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\eigBEJpNrvdNDs" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4016.tmp"
2⤵
- Creates scheduled task(s)
PID:4076

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:328

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:3732

C:\Windows\SysWOW64\netsh.exe
"netsh" wlan show profile
3⤵
PID:4752

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 328 -s 1592
3⤵
- Program crash
PID:3924

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 328 -ip 328
1⤵
PID:3808

Network

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp4016.tmp
Filesize
1KB

MD5
8468c479593f6a7be4ed3c7efd567319

SHA1
2f009a29cf21135297f8ba8b88ef15a81f1fe843

SHA256
d775d225f37fade152fce70a69de8a8851e6669d7bee900a906bdfce989d4fa3

SHA512
83162df381fabeea032a90e199944549f82612095861d2ea74ae3503285c2bf07c8481b35e371474e27583317203a86d34ac5cc3cfd37ef6d795ea4e39e1d43b

Download Submit
memory/328-136-0x0000000000000000-mapping.dmp

Download
memory/328-137-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/328-138-0x0000000006630000-0x0000000006696000-memory.dmp

Filesize
408KB

Download
memory/328-140-0x0000000006C70000-0x0000000006CC0000-memory.dmp

Filesize
320KB

Download
memory/3732-139-0x0000000000000000-mapping.dmp

Download
memory/4076-134-0x0000000000000000-mapping.dmp

Download
memory/4752-141-0x0000000000000000-mapping.dmp

Download
memory/5104-130-0x0000000000A70000-0x0000000000AE0000-memory.dmp

Filesize
448KB

Download
memory/5104-131-0x0000000005440000-0x00000000054DC000-memory.dmp

Filesize
624KB

Download
memory/5104-132-0x00000000055A0000-0x0000000005632000-memory.dmp

Filesize
584KB

Download
memory/5104-133-0x00000000062A0000-0x0000000006844000-memory.dmp

Filesize
5.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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