agenttesla | a04dfafd9b29c2bfcea406d0b0cae7500f349b6266a0f6a6cda47616597e7653

General

Target

OfferRef0094.vbe
Size

10KB
MD5

a51ed306c14c21ca72ca83e08a9ef09f
SHA1

773ff6701795750856b76c16ff52d454849d7eba
SHA256

a04dfafd9b29c2bfcea406d0b0cae7500f349b6266a0f6a6cda47616597e7653
SHA512

ac6903f3095a1b5a5c2b389457a5243bded37ea0b051b94321cedac7298fb3cbd78c133823900feec489b51e929977c0889a0258d01292afb2266d89122f8610
SSDEEP

192:aPDnrW7aSxew+zwqBP+ZFm+qq+GhQTHAiKaEVK:AnrW7aSxebwrmjdGmTHAiO8

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 1 IoCs

Processes:

WScript.exe

flow pid process

2 1396 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

Processes:

WScript.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\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.

Processes:

flow ioc

44 api.ipify.org
45 api.ipify.org

flow	pid	process
2	1396	WScript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	WScript.exe

flow	ioc
44	api.ipify.org
45	api.ipify.org

Drops file in System32 directory 1 IoCs

Processes:

powershell.exe

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

Processes:

powershell.exe

description pid process target process

PID 3664 set thread context of 4512 3664 powershell.exe MSBuild.exe
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

Processes:

MSBuild.exe

description ioc process

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

description	pid	process	target process
PID 3664 set thread context of 4512	3664	powershell.exe	MSBuild.exe

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

Processes:

wermgr.exe

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

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

wermgr.exe

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

Script User-Agent 1 IoCs
Uses user-agent string associated with script host/environment.

Processes:

description flow ioc

HTTP User-Agent header 2 Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

powershell.exeMSBuild.exe

pid process

3664 powershell.exe
3664 powershell.exe
3664 powershell.exe
4512 MSBuild.exe
4512 MSBuild.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exeMSBuild.exe

description pid process

Token: SeDebugPrivilege 3664 powershell.exe
Token: SeDebugPrivilege 4512 MSBuild.exe

description	flow	ioc
HTTP User-Agent header	2	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

pid	process
3664	powershell.exe
3664	powershell.exe
3664	powershell.exe
4512	MSBuild.exe
4512	MSBuild.exe

description	pid	process
Token: SeDebugPrivilege	3664	powershell.exe
Token: SeDebugPrivilege	4512	MSBuild.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

WScript.exepowershell.exe

description	pid	process	target process
PID 4076 wrote to memory of 3664	4076	WScript.exe	powershell.exe
PID 4076 wrote to memory of 3664	4076	WScript.exe	powershell.exe
PID 3664 wrote to memory of 4512	3664	powershell.exe	MSBuild.exe
PID 3664 wrote to memory of 4512	3664	powershell.exe	MSBuild.exe
PID 3664 wrote to memory of 4512	3664	powershell.exe	MSBuild.exe
PID 3664 wrote to memory of 4512	3664	powershell.exe	MSBuild.exe
PID 3664 wrote to memory of 4512	3664	powershell.exe	MSBuild.exe
PID 3664 wrote to memory of 4512	3664	powershell.exe	MSBuild.exe
PID 3664 wrote to memory of 4512	3664	powershell.exe	MSBuild.exe
PID 3664 wrote to memory of 4512	3664	powershell.exe	MSBuild.exe
PID 3664 wrote to memory of 1892	3664	powershell.exe	wermgr.exe
PID 3664 wrote to memory of 1892	3664	powershell.exe	wermgr.exe

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\OfferRef0094.vbe"
1⤵
- Blocklisted process makes network request
PID:1396

C:\Windows\System32\WScript.exe
C:\Windows\System32\WScript.exe "C:\Users\Admin\AppData\Roaming\UkueKOiAEYZeQUG.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4076
- 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:3664
- - 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:4512
- - C:\Windows\system32\wermgr.exe
    "C:\Windows\system32\wermgr.exe" "-outproc" "0" "3664" "2776" "2716" "2780" "0" "0" "2784" "0" "0" "0" "0" "0"
    3⤵
    - Checks processor information in registry
    - Enumerates system info in registry
    PID:1892

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_b2qzxxbc.llk.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
1KB

MD5
8d2ef661762408d476781fc9b8a9fa65

SHA1
72ec46ea5a6e24510a7fa9d8b2b3a0bbd1a8addc

SHA256
1d69d8ce4bff41a38e9ab2c7f238abbbf90cdc7d3e698142253c1379f9cc5cfa

SHA512
ec10960169ab3a24f7e0c8d2848445759fbfc9cdb2bd9f86ec2f663d7d4a30bc5ec31276a21697c8003d99740bb4cf2084043f625b9de0f39682dd05d0bb5a46

Download Submit
memory/3664-18-0x000002485CC90000-0x000002485CC9C000-memory.dmp

Filesize
48KB

Download
memory/3664-14-0x000002485CCC0000-0x000002485CD04000-memory.dmp

Filesize
272KB

Download
memory/3664-15-0x000002485CD90000-0x000002485CE06000-memory.dmp

Filesize
472KB

Download
memory/3664-17-0x000002485C8F0000-0x000002485C8F8000-memory.dmp

Filesize
32KB

Download
memory/3664-13-0x000002485C900000-0x000002485C922000-memory.dmp

Filesize
136KB

Download
memory/4512-19-0x0000000001180000-0x00000000011C0000-memory.dmp

Filesize
256KB

Download
memory/4512-29-0x0000000005DF0000-0x0000000006394000-memory.dmp

Filesize
5.6MB

Download
memory/4512-30-0x0000000005940000-0x00000000059A6000-memory.dmp

Filesize
408KB

Download
memory/4512-31-0x0000000006D40000-0x0000000006D90000-memory.dmp

Filesize
320KB

Download
memory/4512-32-0x0000000006E30000-0x0000000006EC2000-memory.dmp

Filesize
584KB

Download
memory/4512-33-0x0000000006DB0000-0x0000000006DBA000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads