agenttesla | 6b4ae1bde5c68bdc96647dc1154eeea23eda290a970f8ddd9991a67337ab3689

Analysis

max time kernel
126s
max time network
140s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
07/10/2022, 09:51

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General

Target

Doc01201763000.exe
Size

2.9MB
MD5

6bdc2941aadda12fde04af72c227eadd
SHA1

7ad28b6c109ae7ad534c3bef4664f4a5c4ff6310
SHA256

6b4ae1bde5c68bdc96647dc1154eeea23eda290a970f8ddd9991a67337ab3689
SHA512

47263631a93396d7f39257fc23a8fad7e48d3c2e37d75015b6de08c879ce78b10fe63cfc9e99733ef039bb4b22cf0e57a33f6e49ef2349d450f00a5cad4c3328
SSDEEP

24576:bqri8YEiqPPnGIR4bYjQqeCAWqaRyMyV3rRP0rioqOnYQb6VOk9Zv8qAgq:

Score

10^/10

agenttesla quasar office04 collection keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

http://195.178.120.72/ch1t/inc/c20966a2dd74ab.php

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

rze6.sytes.net:5000

Mutex

QSR_MUTEX_nHkW3jdEs5SeHvgyZi

Attributes

encryption_key
sweOMvDPhbI7lawcCiiU
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 1 IoCs

resource	yara_rule
behavioral2/memory/1704-160-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

pid	Process
3892	Lrnssmklpicxdyutowowz.exe
1704	Lrnssmklpicxdyutowowz.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	Lrnssmklpicxdyutowowz.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	Doc01201763000.exe

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-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Doc01201763000.exe
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Doc01201763000.exe
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Doc01201763000.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Pnbqgkmb = "\"C:\\Users\\Admin\\AppData\\Roaming\\Viqfrscsnha\\Pnbqgkmb.exe\""	Doc01201763000.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Pnbqgkmb = "\"C:\\Users\\Admin\\AppData\\Roaming\\Viqfrscsnha\\Pnbqgkmb.exe\""	Lrnssmklpicxdyutowowz.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
30	ip-api.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4876 set thread context of 1264	4876	Doc01201763000.exe	93
PID 3892 set thread context of 1704	3892	Lrnssmklpicxdyutowowz.exe	96

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
4876	Doc01201763000.exe
4692	powershell.exe
4692	powershell.exe
4876	Doc01201763000.exe
4876	Doc01201763000.exe
3892	Lrnssmklpicxdyutowowz.exe
1264	Doc01201763000.exe
1264	Doc01201763000.exe
4392	powershell.exe
4392	powershell.exe
3892	Lrnssmklpicxdyutowowz.exe
3892	Lrnssmklpicxdyutowowz.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	4876	Doc01201763000.exe
Token: SeDebugPrivilege	4692	powershell.exe
Token: SeDebugPrivilege	3892	Lrnssmklpicxdyutowowz.exe
Token: SeDebugPrivilege	1264	Doc01201763000.exe
Token: SeDebugPrivilege	4392	powershell.exe
Token: SeDebugPrivilege	1704	Lrnssmklpicxdyutowowz.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1264	Doc01201763000.exe
1704	Lrnssmklpicxdyutowowz.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 4876 wrote to memory of 4692	4876	Doc01201763000.exe	83
PID 4876 wrote to memory of 4692	4876	Doc01201763000.exe	83
PID 4876 wrote to memory of 4692	4876	Doc01201763000.exe	83
PID 4876 wrote to memory of 3892	4876	Doc01201763000.exe	92
PID 4876 wrote to memory of 3892	4876	Doc01201763000.exe	92
PID 4876 wrote to memory of 3892	4876	Doc01201763000.exe	92
PID 4876 wrote to memory of 1264	4876	Doc01201763000.exe	93
PID 4876 wrote to memory of 1264	4876	Doc01201763000.exe	93
PID 4876 wrote to memory of 1264	4876	Doc01201763000.exe	93
PID 4876 wrote to memory of 1264	4876	Doc01201763000.exe	93
PID 4876 wrote to memory of 1264	4876	Doc01201763000.exe	93
PID 4876 wrote to memory of 1264	4876	Doc01201763000.exe	93
PID 4876 wrote to memory of 1264	4876	Doc01201763000.exe	93
PID 4876 wrote to memory of 1264	4876	Doc01201763000.exe	93
PID 3892 wrote to memory of 4392	3892	Lrnssmklpicxdyutowowz.exe	94
PID 3892 wrote to memory of 4392	3892	Lrnssmklpicxdyutowowz.exe	94
PID 3892 wrote to memory of 4392	3892	Lrnssmklpicxdyutowowz.exe	94
PID 3892 wrote to memory of 1704	3892	Lrnssmklpicxdyutowowz.exe	96
PID 3892 wrote to memory of 1704	3892	Lrnssmklpicxdyutowowz.exe	96
PID 3892 wrote to memory of 1704	3892	Lrnssmklpicxdyutowowz.exe	96
PID 3892 wrote to memory of 1704	3892	Lrnssmklpicxdyutowowz.exe	96
PID 3892 wrote to memory of 1704	3892	Lrnssmklpicxdyutowowz.exe	96
PID 3892 wrote to memory of 1704	3892	Lrnssmklpicxdyutowowz.exe	96
PID 3892 wrote to memory of 1704	3892	Lrnssmklpicxdyutowowz.exe	96
PID 3892 wrote to memory of 1704	3892	Lrnssmklpicxdyutowowz.exe	96

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Doc01201763000.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Doc01201763000.exe

C:\Users\Admin\AppData\Local\Temp\Doc01201763000.exe
"C:\Users\Admin\AppData\Local\Temp\Doc01201763000.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4876
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAANQAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4692
- C:\Users\Admin\AppData\Local\Temp\Lrnssmklpicxdyutowowz.exe
  "C:\Users\Admin\AppData\Local\Temp\Lrnssmklpicxdyutowowz.exe"
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3892
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAANQAwAA==
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4392
- - C:\Users\Admin\AppData\Local\Temp\Lrnssmklpicxdyutowowz.exe
    C:\Users\Admin\AppData\Local\Temp\Lrnssmklpicxdyutowowz.exe
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:1704
- C:\Users\Admin\AppData\Local\Temp\Doc01201763000.exe
  C:\Users\Admin\AppData\Local\Temp\Doc01201763000.exe
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - outlook_office_path
  - outlook_win_path
  PID:1264

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Doc01201763000.exe.log

Filesize
1KB

MD5
7e88081fcf716d85992bb3af3d9b6454

SHA1
2153780fbc71061b0102a7a7b665349e1013e250

SHA256
5ffb4a3ea94a6a53c4f88e2191c6fec5fd8a7336e367aa113fe8c12631e0c4d2

SHA512
ec606e14367ae221c04f213a61a6f797034495121198e4788e3afa4aa8db67bf59c5c5210a56afae5557158e8923b013b371b84c7d64303618c5b4c57a2224f7

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Lrnssmklpicxdyutowowz.exe.log

Filesize
1KB

MD5
7e88081fcf716d85992bb3af3d9b6454

SHA1
2153780fbc71061b0102a7a7b665349e1013e250

SHA256
5ffb4a3ea94a6a53c4f88e2191c6fec5fd8a7336e367aa113fe8c12631e0c4d2

SHA512
ec606e14367ae221c04f213a61a6f797034495121198e4788e3afa4aa8db67bf59c5c5210a56afae5557158e8923b013b371b84c7d64303618c5b4c57a2224f7

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
1KB

MD5
4280e36a29fa31c01e4d8b2ba726a0d8

SHA1
c485c2c9ce0a99747b18d899b71dfa9a64dabe32

SHA256
e2486a1bdcba80dad6dd6210d7374bd70ae196a523c06ceda71370fd3ea78359

SHA512
494fe5f0ade03669e5830bed93c964d69b86629440148d7b0881cf53203fd89443ebff9b4d1ee9d96244f62af6edede622d9eacba37f80f389a0d522e4ad4ea4

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache

Filesize
53KB

MD5
06ad34f9739c5159b4d92d702545bd49

SHA1
9152a0d4f153f3f40f7e606be75f81b582ee0c17

SHA256
474813b625f00710f29fa3b488235a6a22201851efb336bddf60d7d24a66bfba

SHA512
c272cd28ae164d465b779163ba9eca6a28261376414c6bbdfbd9f2128adb7f7ff1420e536b4d6000d0301ded2ec9036bc5c657588458bff41f176bdce8d74f92

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
16KB

MD5
aefb1c8a8cef2fdfea229010328bb621

SHA1
3496fc20038d8917ae53248f3f8ff50e6c9f98f2

SHA256
b2f47031d07fc3fbb19b4a71e571d84e5da0ad978ec9b89bfc53bdddb55904f0

SHA512
1b6bdfb85202390157328d2c3a7afb3b7be495a0bc542f73b1df29e5ab60d200d5700ee2c75a324db2f563a1c1d7cc1f5064988f48b9f3b87e5db5136bce4abf

Download Submit
C:\Users\Admin\AppData\Local\Temp\Lrnssmklpicxdyutowowz.exe

Filesize
1.5MB

MD5
8173e9179a9a1f29d084e32ee3c30c65

SHA1
f4f6f60a59b6129045bc1ae18667eccb4787d651

SHA256
7ada3fa6c166700d7d08cd4fd4503454f515df92d501c5b7ba306f71144b9730

SHA512
fa1fbb733ef09ac7b9098ca533a131ef5fa24155285c4f5d7b10da36d8ed788e9d0bbc48a4af70b70d78578640634b252fc0c980a7b631f7ed8fe816252ccca9

Download Submit
C:\Users\Admin\AppData\Local\Temp\Lrnssmklpicxdyutowowz.exe

Filesize
1.5MB

MD5
8173e9179a9a1f29d084e32ee3c30c65

SHA1
f4f6f60a59b6129045bc1ae18667eccb4787d651

SHA256
7ada3fa6c166700d7d08cd4fd4503454f515df92d501c5b7ba306f71144b9730

SHA512
fa1fbb733ef09ac7b9098ca533a131ef5fa24155285c4f5d7b10da36d8ed788e9d0bbc48a4af70b70d78578640634b252fc0c980a7b631f7ed8fe816252ccca9

Download Submit
C:\Users\Admin\AppData\Local\Temp\Lrnssmklpicxdyutowowz.exe

Filesize
1.5MB

MD5
8173e9179a9a1f29d084e32ee3c30c65

SHA1
f4f6f60a59b6129045bc1ae18667eccb4787d651

SHA256
7ada3fa6c166700d7d08cd4fd4503454f515df92d501c5b7ba306f71144b9730

SHA512
fa1fbb733ef09ac7b9098ca533a131ef5fa24155285c4f5d7b10da36d8ed788e9d0bbc48a4af70b70d78578640634b252fc0c980a7b631f7ed8fe816252ccca9

Download Submit
C:\Users\Admin\AppData\Roaming\Viqfrscsnha\Pnbqgkmb.exe

Filesize
1.5MB

MD5
8173e9179a9a1f29d084e32ee3c30c65

SHA1
f4f6f60a59b6129045bc1ae18667eccb4787d651

SHA256
7ada3fa6c166700d7d08cd4fd4503454f515df92d501c5b7ba306f71144b9730

SHA512
fa1fbb733ef09ac7b9098ca533a131ef5fa24155285c4f5d7b10da36d8ed788e9d0bbc48a4af70b70d78578640634b252fc0c980a7b631f7ed8fe816252ccca9

Download Submit
memory/1264-156-0x0000000007520000-0x00000000075B2000-memory.dmp

Filesize
584KB

Download
memory/1264-157-0x0000000006C50000-0x0000000006C5A000-memory.dmp

Filesize
40KB

Download
memory/1264-155-0x0000000006C60000-0x0000000006CB0000-memory.dmp

Filesize
320KB

Download
memory/1264-147-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/1264-149-0x0000000005EF0000-0x0000000006494000-memory.dmp

Filesize
5.6MB

Download
memory/1264-150-0x0000000005AC0000-0x0000000005B5C000-memory.dmp

Filesize
624KB

Download
memory/1704-160-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/1704-164-0x0000000006660000-0x000000000669C000-memory.dmp

Filesize
240KB

Download
memory/1704-163-0x00000000060F0000-0x0000000006102000-memory.dmp

Filesize
72KB

Download
memory/3892-145-0x00000000001D0000-0x0000000000360000-memory.dmp

Filesize
1.6MB

Download
memory/4692-139-0x0000000006360000-0x000000000637E000-memory.dmp

Filesize
120KB

Download
memory/4692-136-0x0000000005640000-0x0000000005C68000-memory.dmp

Filesize
6.2MB

Download
memory/4692-135-0x0000000002D80000-0x0000000002DB6000-memory.dmp

Filesize
216KB

Download
memory/4692-137-0x0000000005440000-0x00000000054A6000-memory.dmp

Filesize
408KB

Download
memory/4692-138-0x0000000005520000-0x0000000005586000-memory.dmp

Filesize
408KB

Download
memory/4692-141-0x0000000006870000-0x000000000688A000-memory.dmp

Filesize
104KB

Download
memory/4692-140-0x0000000007990000-0x000000000800A000-memory.dmp

Filesize
6.5MB

Download
memory/4876-132-0x0000000000740000-0x0000000000A2E000-memory.dmp

Filesize
2.9MB

Download
memory/4876-133-0x0000000005FA0000-0x0000000005FC2000-memory.dmp

Filesize
136KB

Download