agenttesla | 135d2c94647886d894ee45ae70ac9d0accad9860ff5c4b29397489783f56d794

General

Target

DOC.exe
Size

756KB
MD5

91d8c3dbdbe3db1041f438046e1bc0e0
SHA1

6bdc2ac56290abdc35be53cdc1e697166c203d81
SHA256

fe200cf4827d467a2915295f0b092c7afedfc13dde1381a74bb884e2baceb44c
SHA512

9b466c84d0c0815ead8c5691946a474daa9db3e823680acb9d0d189412b3e7dc10ecd6f1eb062637946bcef7ce1b54a1167d8c0f2abbd218c6bacb1155777e70

Score

10^/10

agenttesla collection keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.varda.com.tr
Port:
587
Username:
info@varda.com.tr
Password:
varda9997929

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/4940-137-0x0000000000400000-0x0000000000474000-memory.dmp	family_agenttesla

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
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:

DOC.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation DOC.exe

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

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	DOC.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

RegSvcs.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\15.0\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-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\CpSnJ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\CpSnJ\\CpSnJ.exe"	RegSvcs.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

DOC.exe

description pid process target process

PID 1880 set thread context of 4940 1880 DOC.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

4604 schtasks.exe
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

REG.exe

pid process

3224 REG.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

RegSvcs.exe

pid process

4940 RegSvcs.exe
4940 RegSvcs.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

RegSvcs.exe

description pid process

Token: SeDebugPrivilege 4940 RegSvcs.exe

description	pid	process	target process
PID 1880 set thread context of 4940	1880	DOC.exe	RegSvcs.exe

pid	process
4604	schtasks.exe

pid	process
3224	REG.exe

pid	process
4940	RegSvcs.exe
4940	RegSvcs.exe

description	pid	process
Token: SeDebugPrivilege	4940	RegSvcs.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

DOC.exeRegSvcs.exe

description	pid	process	target process
PID 1880 wrote to memory of 4604	1880	DOC.exe	schtasks.exe
PID 1880 wrote to memory of 4604	1880	DOC.exe	schtasks.exe
PID 1880 wrote to memory of 4604	1880	DOC.exe	schtasks.exe
PID 1880 wrote to memory of 4940	1880	DOC.exe	RegSvcs.exe
PID 1880 wrote to memory of 4940	1880	DOC.exe	RegSvcs.exe
PID 1880 wrote to memory of 4940	1880	DOC.exe	RegSvcs.exe
PID 1880 wrote to memory of 4940	1880	DOC.exe	RegSvcs.exe
PID 1880 wrote to memory of 4940	1880	DOC.exe	RegSvcs.exe
PID 1880 wrote to memory of 4940	1880	DOC.exe	RegSvcs.exe
PID 1880 wrote to memory of 4940	1880	DOC.exe	RegSvcs.exe
PID 1880 wrote to memory of 4940	1880	DOC.exe	RegSvcs.exe
PID 4940 wrote to memory of 3224	4940	RegSvcs.exe	REG.exe
PID 4940 wrote to memory of 3224	4940	RegSvcs.exe	REG.exe
PID 4940 wrote to memory of 3224	4940	RegSvcs.exe	REG.exe

outlook_office_path 1 IoCs

Processes:

RegSvcs.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\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-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe

C:\Users\Admin\AppData\Local\Temp\DOC.exe
"C:\Users\Admin\AppData\Local\Temp\DOC.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1880

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\cFIBIw" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8695.tmp"
2⤵
- Creates scheduled task(s)
PID:4604

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:4940

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:3224

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

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp8695.tmp
Filesize
1KB

MD5
b38e12eb08fa38e5cbbec43222c7eed2

SHA1
9df484e4ed33d10265df873f9ad8ef81c617de54

SHA256
a3f8d75fa66e06247941568d4b61bb8094a5baf01c3ebea4ff5ff1e8eb7b7e16

SHA512
f84efb39b7bc45ea3f389087fff36777a82026eb36cdd2bdae07e36a1d901d5d7a0377d31690b225557a52ae0c8f63605ce05a8f038fa48887b66a8975b83224

Download Submit
memory/1880-130-0x00000000001A0000-0x0000000000264000-memory.dmp

Filesize
784KB

Download
memory/1880-131-0x00000000051B0000-0x0000000005754000-memory.dmp

Filesize
5.6MB

Download
memory/1880-132-0x0000000004CA0000-0x0000000004D32000-memory.dmp

Filesize
584KB

Download
memory/1880-133-0x0000000004D40000-0x0000000004DDC000-memory.dmp

Filesize
624KB

Download
memory/3224-140-0x0000000000000000-mapping.dmp

Download
memory/4604-134-0x0000000000000000-mapping.dmp

Download
memory/4940-136-0x0000000000000000-mapping.dmp

Download
memory/4940-137-0x0000000000400000-0x0000000000474000-memory.dmp

Filesize
464KB

Download
memory/4940-138-0x0000000006700000-0x0000000006766000-memory.dmp

Filesize
408KB

Download
memory/4940-139-0x0000000006D70000-0x0000000006DC0000-memory.dmp

Filesize
320KB

Download
memory/4940-141-0x0000000006F10000-0x0000000006F1A000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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