agenttesla | b7485129bfd03a3a6be7fd8b30eb70b0f89631bb81ebbfdf6d7ad78fc17fc38e

General

Target
Halkbank.exe
Size 943KB
Sample221122-lhmfcscb9w
SHA256 b7485129bfd03a3a6be7fd8b30eb70b0f89631bb81ebbfdf6d7ad78fc17fc38e
MD5 7dd92ca41b283f0d37d3f1f1d17f3565
SHA1 9a093939b6938b267a5adb94494931f53ff3da73
SHA512 6d74632d05fc6e00335c9852a5f537302ec358206189418fe7b22c47aefbeb49f155ff18955892782a9e07e50f75750d344da49878dfc74d9a3bc85df3414964
SSDEEP 24576:MM+L74mBfNUstzoZTJylXqsDHNXnrpA7BrDR3eX7wU6f3r8JN:z9y1qs7N3OdPNuEU6fI
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

agenttesla collection keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot5792996127:AAEo0wCCYZp60yQsf_X1P7t-T5AAK5KPYXY/

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
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
T1081
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
T1081
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
T1081

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Halkbank.exe
Key opened	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Halkbank.exe
Key opened	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Halkbank.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\regis = "C:\\Users\\Admin\\AppData\\Roaming\\regis\\regis.exe"	Halkbank.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
35	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4740 set thread context of 5000	4740	Halkbank.exe	86

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
4740	Halkbank.exe
4740	Halkbank.exe
5000	Halkbank.exe
5000	Halkbank.exe
5000	Halkbank.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4740	Halkbank.exe
Token: SeDebugPrivilege	5000	Halkbank.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5000	Halkbank.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4740 wrote to memory of 5000	4740	Halkbank.exe	86
PID 4740 wrote to memory of 5000	4740	Halkbank.exe	86
PID 4740 wrote to memory of 5000	4740	Halkbank.exe	86
PID 4740 wrote to memory of 5000	4740	Halkbank.exe	86
PID 4740 wrote to memory of 5000	4740	Halkbank.exe	86
PID 4740 wrote to memory of 5000	4740	Halkbank.exe	86
PID 4740 wrote to memory of 5000	4740	Halkbank.exe	86
PID 4740 wrote to memory of 5000	4740	Halkbank.exe	86

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Halkbank.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Halkbank.exe

C:\Users\Admin\AppData\Local\Temp\Halkbank.exe
"C:\Users\Admin\AppData\Local\Temp\Halkbank.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4740
- C:\Users\Admin\AppData\Local\Temp\Halkbank.exe
  "C:\Users\Admin\AppData\Local\Temp\Halkbank.exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - outlook_office_path
  - outlook_win_path
  PID:5000

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

3

T1081

Discovery

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

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Downloads

Halkbank.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Halkbank.exe.log
Size 1KB
SHA256 7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982
MD5 8ec831f3e3a3f77e4a7b9cd32b48384c
SHA1 d83f09fd87c5bd86e045873c231c14836e76a05c
SHA512 26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3
MD5 SHA1 SHA512

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memory/4740-132-0x0000000000100000-0x00000000001F2000-memory.dmp

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memory/4740-133-0x00000000051E0000-0x0000000005784000-memory.dmp

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memory/4740-134-0x0000000004C30000-0x0000000004CC2000-memory.dmp

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memory/4740-135-0x0000000004BA0000-0x0000000004BAA000-memory.dmp

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memory/4740-136-0x0000000007390000-0x000000000742C000-memory.dmp

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memory/5000-138-0x0000000000400000-0x000000000043C000-memory.dmp

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memory/5000-140-0x0000000006030000-0x0000000006096000-memory.dmp

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memory/5000-141-0x0000000006CC0000-0x0000000006D10000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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