agenttesla | e37dfd22eb88db0869e3629b579abd3f14c6cdaae221e84aa97be7c094753c70

General

Target

overdue account letter.PDF.exe
Size

461KB
MD5

1319cf2f252ccac65fc3d468b487593d
SHA1

ba35e5badeaac9233605ca750849dd3ee324413a
SHA256

0843dfe5e6b3266770393c129939c4fc85db09ee36dd51696fbc711a3b556460
SHA512

025a7cb074dbb315bb9e3366cd71a1cced563a8e17143d1cdc51d20eeb0a73d374fbc1f5f044eba2edc111a2c1970654060b55f6c1c09b8331ca9e887e4561bb

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/2740-138-0x0000000000400000-0x0000000000452000-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:

overdue account letter.PDF.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	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-1-5-21-1081944012-3634099177-1681222835-1000\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 4500 set thread context of 2740 4500 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

2264 2740 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

3660 schtasks.exe
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

REG.exe

pid process

4252 REG.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

RegSvcs.exe

pid process

2740 RegSvcs.exe
2740 RegSvcs.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

RegSvcs.exe

description pid process

Token: SeDebugPrivilege 2740 RegSvcs.exe

description	pid	process	target process
PID 4500 set thread context of 2740	4500	overdue account letter.PDF.exe	RegSvcs.exe

pid	pid_target	process	target process
2264	2740	WerFault.exe	RegSvcs.exe

pid	process
3660	schtasks.exe

pid	process
4252	REG.exe

pid	process
2740	RegSvcs.exe
2740	RegSvcs.exe

description	pid	process
Token: SeDebugPrivilege	2740	RegSvcs.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

overdue account letter.PDF.exeRegSvcs.exe

description	pid	process	target process
PID 4500 wrote to memory of 3660	4500	overdue account letter.PDF.exe	schtasks.exe
PID 4500 wrote to memory of 3660	4500	overdue account letter.PDF.exe	schtasks.exe
PID 4500 wrote to memory of 3660	4500	overdue account letter.PDF.exe	schtasks.exe
PID 4500 wrote to memory of 2740	4500	overdue account letter.PDF.exe	RegSvcs.exe
PID 4500 wrote to memory of 2740	4500	overdue account letter.PDF.exe	RegSvcs.exe
PID 4500 wrote to memory of 2740	4500	overdue account letter.PDF.exe	RegSvcs.exe
PID 4500 wrote to memory of 2740	4500	overdue account letter.PDF.exe	RegSvcs.exe
PID 4500 wrote to memory of 2740	4500	overdue account letter.PDF.exe	RegSvcs.exe
PID 4500 wrote to memory of 2740	4500	overdue account letter.PDF.exe	RegSvcs.exe
PID 4500 wrote to memory of 2740	4500	overdue account letter.PDF.exe	RegSvcs.exe
PID 4500 wrote to memory of 2740	4500	overdue account letter.PDF.exe	RegSvcs.exe
PID 2740 wrote to memory of 4252	2740	RegSvcs.exe	REG.exe
PID 2740 wrote to memory of 4252	2740	RegSvcs.exe	REG.exe
PID 2740 wrote to memory of 4252	2740	RegSvcs.exe	REG.exe
PID 2740 wrote to memory of 2400	2740	RegSvcs.exe	netsh.exe
PID 2740 wrote to memory of 2400	2740	RegSvcs.exe	netsh.exe
PID 2740 wrote to memory of 2400	2740	RegSvcs.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\overdue account letter.PDF.exe
"C:\Users\Admin\AppData\Local\Temp\overdue account letter.PDF.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4500

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\AxUultNdoS" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA568.tmp"
2⤵
- Creates scheduled task(s)
PID:3660

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:2740

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:4252

C:\Windows\SysWOW64\netsh.exe
"netsh" wlan show profile
3⤵
PID:2400

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2740 -s 1588
3⤵
- Program crash
PID:2264

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2740 -ip 2740
1⤵
PID:3584

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpA568.tmp

Filesize
1KB

MD5
69892d3061c4342cbed49c3d446dd88a

SHA1
81a2c2a107a24d97b2d2286f9e5ffecdacaf3ef4

SHA256
69888bcb78558c0b9fe5431a23e1192a4f111a3e4ff531be7f4d2156c90368e0

SHA512
3a2a9ea3041045dfa2d63fa6dbc214418a45ac7b17e3e584b0cbbf9f1f37ff5418e0c85439e76772cfc9c3c1d0b3c77c04d831934e1d76a9358e544c94471a33

Download Submit
memory/2400-142-0x0000000000000000-mapping.dmp

Download
memory/2740-139-0x0000000005B80000-0x0000000005BE6000-memory.dmp

Filesize
408KB

Download
memory/2740-137-0x0000000000000000-mapping.dmp

Download
memory/2740-138-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/2740-141-0x0000000006730000-0x0000000006780000-memory.dmp

Filesize
320KB

Download
memory/3660-135-0x0000000000000000-mapping.dmp

Download
memory/4252-140-0x0000000000000000-mapping.dmp

Download
memory/4500-133-0x0000000004FF0000-0x0000000004FFA000-memory.dmp

Filesize
40KB

Download
memory/4500-134-0x00000000087C0000-0x000000000885C000-memory.dmp

Filesize
624KB

Download
memory/4500-132-0x0000000005030000-0x00000000050C2000-memory.dmp

Filesize
584KB

Download
memory/4500-130-0x00000000005D0000-0x000000000064A000-memory.dmp

Filesize
488KB

Download
memory/4500-131-0x00000000055E0000-0x0000000005B84000-memory.dmp

Filesize
5.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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