agenttesla | eaae036429966edb9d7efcc60e7d8af4ecb0e60b668083125c64aed949753948

General

Target

Letter Of Intent.vbe
Size

11KB
MD5

59958a367c15cc55b0b42db533eb99a8
SHA1

06d169da811d8d0abce9280ff7fd748f125e1aff
SHA256

5a793830dc868d92331342fbca7bb5338b6014944a972960c97f7d9d3f3c66ae
SHA512

bc7fbbb16f83492876f298f98160b264150ee995871f0e2d59c5c49d703bf2f21721ca1d49d293264be798ef0da2b5ebb4f423be5ddc788d34f1369db03e546e
SSDEEP

192:kn3g3XXH2AYKtbXq1qFqpSJ7sWfqH2hmqaOdC8NhuOzWNpK:uw3XXH2aA1qFkiQWfq2mqLdCpxw

Score

10^/10

agenttesla discovery keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
162.254.34.31
Port:
587
Username:
[email protected]
Password:
M992uew1mw6Z
Email To:
[email protected]

Signatures

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

Blocklisted process makes network request 2 IoCs

flow	pid	Process
1	2916	WScript.exe
30	2916	WScript.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	WScript.exe

Looks up external IP address via web service 2 IoCs

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

flow	ioc
61	api.ipify.org
62	api.ipify.org

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\%AppData%\Microsoft\Windows\Start Menu\Programs\Windows PowerShell\Windows PowerShell.lnk	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4020 set thread context of 5096	4020	powershell.exe	103

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MSBuild.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	wermgr.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	wermgr.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	wermgr.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	wermgr.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	wermgr.exe

Script User-Agent 2 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	1	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	30	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
4020	powershell.exe
4020	powershell.exe
4020	powershell.exe
5096	MSBuild.exe
5096	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4020	powershell.exe
Token: SeDebugPrivilege	5096	MSBuild.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 456 wrote to memory of 4020	456	WScript.exe	99
PID 456 wrote to memory of 4020	456	WScript.exe	99
PID 4020 wrote to memory of 5096	4020	powershell.exe	103
PID 4020 wrote to memory of 5096	4020	powershell.exe	103
PID 4020 wrote to memory of 5096	4020	powershell.exe	103
PID 4020 wrote to memory of 5096	4020	powershell.exe	103
PID 4020 wrote to memory of 5096	4020	powershell.exe	103
PID 4020 wrote to memory of 5096	4020	powershell.exe	103
PID 4020 wrote to memory of 5096	4020	powershell.exe	103
PID 4020 wrote to memory of 5096	4020	powershell.exe	103
PID 4020 wrote to memory of 3684	4020	powershell.exe	104
PID 4020 wrote to memory of 3684	4020	powershell.exe	104

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Letter Of Intent.vbe"
1⤵
- Blocklisted process makes network request
PID:2916

C:\Windows\System32\WScript.exe
C:\Windows\System32\WScript.exe "C:\Users\Admin\AppData\Roaming\raeljTgEWGjaGRB.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:456
- C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4020
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:5096
- - C:\Windows\system32\wermgr.exe
    "C:\Windows\system32\wermgr.exe" "-outproc" "0" "4020" "2824" "2772" "2828" "0" "0" "2832" "0" "0" "0" "0" "0"
    3⤵
    - Checks processor information in registry
    - Enumerates system info in registry
    PID:3684

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

4

T1012

System Information Discovery

4

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_0cs2kpcb.s4s.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\raeljTgEWGjaGRB.vbs

Filesize
2KB

MD5
8384daa670f00cf4c9496f2d12d9b8f6

SHA1
e419e19ca81b413db0c32a571f53fcaf281dfb8f

SHA256
6393535545043090f4d6a7fb15c2bfd37eab1a1059a2af20eabb88263443d545

SHA512
36e76e832545004f0c571954cff28aba32d18b8fe27bf83e103a62454c1e585728d47526db7a63ccc5b0496f18f8770ff467137b7a958207a96a5b8df60a4838

Download Submit
memory/4020-18-0x00000193522B0000-0x00000193522BC000-memory.dmp

Filesize
48KB

Download
memory/4020-14-0x00000193522C0000-0x0000019352304000-memory.dmp

Filesize
272KB

Download
memory/4020-15-0x0000019352390000-0x0000019352406000-memory.dmp

Filesize
472KB

Download
memory/4020-17-0x00000193522A0000-0x00000193522A8000-memory.dmp

Filesize
32KB

Download
memory/4020-13-0x0000019351F00000-0x0000019351F22000-memory.dmp

Filesize
136KB

Download
memory/5096-19-0x00000000005A0000-0x00000000005E0000-memory.dmp

Filesize
256KB

Download
memory/5096-29-0x0000000005490000-0x0000000005A34000-memory.dmp

Filesize
5.6MB

Download
memory/5096-30-0x00000000050A0000-0x0000000005106000-memory.dmp

Filesize
408KB

Download
memory/5096-31-0x00000000065A0000-0x00000000065F0000-memory.dmp

Filesize
320KB

Download
memory/5096-32-0x0000000006690000-0x0000000006722000-memory.dmp

Filesize
584KB

Download
memory/5096-33-0x0000000006610000-0x000000000661A000-memory.dmp

Filesize
40KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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