agenttesla | 7f837bebee96bf3ff49561b9300c10466bf1ca891ef4a18be35cd56146b040e4

General

Target

Rybkdr.exe
Size

1.1MB
MD5

d6393631100d7160ca348397cb01943d
SHA1

3ff0803ae9fd31efc74bcb29006c1cbf29b03f75
SHA256

eea977d6c736325a557a0c31552c49c51399748fc138db772735109fb6510757
SHA512

efef9bd64c68757c762a2fdbeb21cc6fc504b85dfd4f468b13504b00b365b58cd83aad3dbbc1cc12c8688d74777d69d6e09685cc9310a0cd29885f6a74fea576
SSDEEP

24576:X1uC5JT92RkNSIXtzdf1ZOS0e42xWVYknV3G/Z:AKfRdtsS0e4GIV3GR

Score

10^/10

agenttesla purelogs keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.asiaparadisehotel.com
Port:
587
Username:
[email protected]
Password:
S,i*jv&Bj09k
Email To:
[email protected]

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla

Detect PureLogs payload 1 IoCs

resource	yara_rule
behavioral2/memory/1232-0-0x0000000000740000-0x0000000000866000-memory.dmp	family_purelogs

PureLogs
PureLogs is an infostealer written in C#.
stealer purelogs
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-596315103-1488671723-776734015-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\My App = "C:\\Users\\Admin\\AppData\\Roaming\\My App\\My App.exe"	Rybkdr.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-596315103-1488671723-776734015-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Pwdhqxrq = "C:\\Users\\Admin\\AppData\\Roaming\\Pwdhqxrq.exe"	Rybkdr.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
3	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1232 set thread context of 4568	1232	Rybkdr.exe	89

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4568	Rybkdr.exe
4568	Rybkdr.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1232	Rybkdr.exe
Token: SeDebugPrivilege	4568	Rybkdr.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1232 wrote to memory of 4568	1232	Rybkdr.exe	89
PID 1232 wrote to memory of 4568	1232	Rybkdr.exe	89
PID 1232 wrote to memory of 4568	1232	Rybkdr.exe	89
PID 1232 wrote to memory of 4568	1232	Rybkdr.exe	89
PID 1232 wrote to memory of 4568	1232	Rybkdr.exe	89
PID 1232 wrote to memory of 4568	1232	Rybkdr.exe	89
PID 1232 wrote to memory of 4568	1232	Rybkdr.exe	89
PID 1232 wrote to memory of 4568	1232	Rybkdr.exe	89

C:\Users\Admin\AppData\Local\Temp\Rybkdr.exe
"C:\Users\Admin\AppData\Local\Temp\Rybkdr.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1232
- C:\Users\Admin\AppData\Local\Temp\Rybkdr.exe
  C:\Users\Admin\AppData\Local\Temp\Rybkdr.exe
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4568

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Unsecured Credentials

3

T1552

Credentials In Files

3

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Rybkdr.exe.log

Filesize
927B

MD5
4a911455784f74e368a4c2c7876d76f4

SHA1
a1700a0849ffb4f26671eb76da2489946b821c34

SHA256
264098e15b5b33d425f3b76e45b7976b58f917048125041135f7e60d8151108c

SHA512
4617591400409e1930195795a55e20d5f063042bb3e9fd1955099066e507b6ac8a1e3ae54cc42418e2639149b31bf7e58cd5743670d9030a15e29f14d813815d

Download Submit
memory/1232-0-0x0000000000740000-0x0000000000866000-memory.dmp

Filesize
1.1MB

Download
memory/1232-1-0x0000000074B80000-0x0000000075330000-memory.dmp

Filesize
7.7MB

Download
memory/1232-2-0x00000000051E0000-0x000000000523A000-memory.dmp

Filesize
360KB

Download
memory/1232-3-0x00000000052F0000-0x0000000005300000-memory.dmp

Filesize
64KB

Download
memory/1232-4-0x0000000005240000-0x0000000005282000-memory.dmp

Filesize
264KB

Download
memory/1232-5-0x00000000052A0000-0x00000000052E0000-memory.dmp

Filesize
256KB

Download
memory/1232-6-0x0000000005300000-0x000000000534C000-memory.dmp

Filesize
304KB

Download
memory/1232-7-0x0000000005950000-0x0000000005EF4000-memory.dmp

Filesize
5.6MB

Download
memory/1232-12-0x0000000074B80000-0x0000000075330000-memory.dmp

Filesize
7.7MB

Download
memory/4568-13-0x0000000074B80000-0x0000000075330000-memory.dmp

Filesize
7.7MB

Download
memory/4568-9-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/4568-15-0x0000000005320000-0x0000000005386000-memory.dmp

Filesize
408KB

Download
memory/4568-14-0x00000000052C0000-0x00000000052D0000-memory.dmp

Filesize
64KB

Download
memory/4568-17-0x0000000006AC0000-0x0000000006B10000-memory.dmp

Filesize
320KB

Download
memory/4568-18-0x0000000006BB0000-0x0000000006C4C000-memory.dmp

Filesize
624KB

Download
memory/4568-19-0x0000000074B80000-0x0000000075330000-memory.dmp

Filesize
7.7MB

Download
memory/4568-20-0x00000000052C0000-0x00000000052D0000-memory.dmp

Filesize
64KB

Download
memory/4568-21-0x0000000006DF0000-0x0000000006E82000-memory.dmp

Filesize
584KB

Download
memory/4568-22-0x0000000006DC0000-0x0000000006DCA000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads