agenttesla | c5f8a57e9e252306e9876a01fbc423420693bf04cf7c33fb0bbf972e34299f21

General

Target

439c8eaf5105f874659e06ecca63e66b.exe
Size

25KB
MD5

439c8eaf5105f874659e06ecca63e66b
SHA1

f264db763cacbcbc6620353097b1cd6367d14afb
SHA256

c5f8a57e9e252306e9876a01fbc423420693bf04cf7c33fb0bbf972e34299f21
SHA512

2cf9bb028b1d8ca1c321f9a809c6e1d0552992eefc2229661579edeaac8ef0d9926ff1e0a26d8962f6672a45be7bc7b2a86b8331a43a922418569b889853ac5a
SSDEEP

96:1Nd/FIveD4XyrmRNb++DvI63LilNRZjHgnmXV/cfDj6hLGkZNiRB4e3T3e4KxJdv:bxFIqmA62lNTDcmXZCehLrZbxJX

Score

10^/10

agenttesla purecrypter collection downloader keylogger loader persistence spyware stealer trojan

Malware Config

Extracted

Family

purecrypter

C2

http://www.ugr.leszczynskie.net/galeria/Xcilfp.png

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter

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-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	439c8eaf5105f874659e06ecca63e66b.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-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	439c8eaf5105f874659e06ecca63e66b.exe
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	439c8eaf5105f874659e06ecca63e66b.exe
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	439c8eaf5105f874659e06ecca63e66b.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-1-5-21-144354903-2550862337-1367551827-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nEdIOIr = "C:\\Users\\Admin\\AppData\\Roaming\\nEdIOIr\\nEdIOIr.exe"	439c8eaf5105f874659e06ecca63e66b.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
19	api.ipify.org
17	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 388 set thread context of 4576	388	439c8eaf5105f874659e06ecca63e66b.exe	87

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 2 IoCs

pid	Process
628	powershell.exe
628	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	388	439c8eaf5105f874659e06ecca63e66b.exe
Token: SeDebugPrivilege	628	powershell.exe
Token: SeDebugPrivilege	4576	439c8eaf5105f874659e06ecca63e66b.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4576	439c8eaf5105f874659e06ecca63e66b.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 388 wrote to memory of 628	388	439c8eaf5105f874659e06ecca63e66b.exe	85
PID 388 wrote to memory of 628	388	439c8eaf5105f874659e06ecca63e66b.exe	85
PID 388 wrote to memory of 628	388	439c8eaf5105f874659e06ecca63e66b.exe	85
PID 388 wrote to memory of 4576	388	439c8eaf5105f874659e06ecca63e66b.exe	87
PID 388 wrote to memory of 4576	388	439c8eaf5105f874659e06ecca63e66b.exe	87
PID 388 wrote to memory of 4576	388	439c8eaf5105f874659e06ecca63e66b.exe	87
PID 388 wrote to memory of 4576	388	439c8eaf5105f874659e06ecca63e66b.exe	87
PID 388 wrote to memory of 4576	388	439c8eaf5105f874659e06ecca63e66b.exe	87
PID 388 wrote to memory of 4576	388	439c8eaf5105f874659e06ecca63e66b.exe	87
PID 388 wrote to memory of 4576	388	439c8eaf5105f874659e06ecca63e66b.exe	87
PID 388 wrote to memory of 4576	388	439c8eaf5105f874659e06ecca63e66b.exe	87

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	439c8eaf5105f874659e06ecca63e66b.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	439c8eaf5105f874659e06ecca63e66b.exe

C:\Users\Admin\AppData\Local\Temp\439c8eaf5105f874659e06ecca63e66b.exe
"C:\Users\Admin\AppData\Local\Temp\439c8eaf5105f874659e06ecca63e66b.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:388
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:628
- C:\Users\Admin\AppData\Local\Temp\439c8eaf5105f874659e06ecca63e66b.exe
  C:\Users\Admin\AppData\Local\Temp\439c8eaf5105f874659e06ecca63e66b.exe
  2⤵
  - Accesses Microsoft Outlook profiles
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - outlook_office_path
  - outlook_win_path
  PID:4576

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\439c8eaf5105f874659e06ecca63e66b.exe.log

Filesize
1KB

MD5
3a9188331a78f1dbce606db64b841fcb

SHA1
8e2c99b7c477d06591a856a4ea3e1e214719eee8

SHA256
db4137e258a0f6159fda559a5f6dd2704be0582c3f0586f65040c7ad1eb68451

SHA512
d1a994610a045d89d5d306866c24ae56bf16555414b8f63f632552568e67b5586f26d5a17a1f0a55ada376730298e6d856e9161828d4eae9decfa4e015e0e90a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5l3dggnm.lxc.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/388-134-0x00000000051D0000-0x00000000051E0000-memory.dmp

Filesize
64KB

Download
memory/388-135-0x0000000006540000-0x0000000006562000-memory.dmp

Filesize
136KB

Download
memory/388-155-0x00000000051D0000-0x00000000051E0000-memory.dmp

Filesize
64KB

Download
memory/388-133-0x0000000000900000-0x000000000090C000-memory.dmp

Filesize
48KB

Download
memory/628-153-0x0000000003060000-0x0000000003070000-memory.dmp

Filesize
64KB

Download
memory/628-158-0x0000000003060000-0x0000000003070000-memory.dmp

Filesize
64KB

Download
memory/628-139-0x0000000003060000-0x0000000003070000-memory.dmp

Filesize
64KB

Download
memory/628-146-0x0000000005ED0000-0x0000000005F36000-memory.dmp

Filesize
408KB

Download
memory/628-151-0x00000000064D0000-0x00000000064EE000-memory.dmp

Filesize
120KB

Download
memory/628-152-0x0000000007B10000-0x000000000818A000-memory.dmp

Filesize
6.5MB

Download
memory/628-138-0x0000000003060000-0x0000000003070000-memory.dmp

Filesize
64KB

Download
memory/628-154-0x00000000069F0000-0x0000000006A0A000-memory.dmp

Filesize
104KB

Download
memory/628-137-0x0000000005720000-0x0000000005D48000-memory.dmp

Filesize
6.2MB

Download
memory/628-156-0x0000000003060000-0x0000000003070000-memory.dmp

Filesize
64KB

Download
memory/628-157-0x0000000003060000-0x0000000003070000-memory.dmp

Filesize
64KB

Download
memory/628-140-0x0000000005DF0000-0x0000000005E56000-memory.dmp

Filesize
408KB

Download
memory/628-136-0x0000000002BB0000-0x0000000002BE6000-memory.dmp

Filesize
216KB

Download
memory/4576-162-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/4576-165-0x0000000005C40000-0x00000000061E4000-memory.dmp

Filesize
5.6MB

Download
memory/4576-166-0x00000000057C0000-0x00000000057D0000-memory.dmp

Filesize
64KB

Download
memory/4576-167-0x0000000006F60000-0x0000000006FF2000-memory.dmp

Filesize
584KB

Download
memory/4576-170-0x0000000006F30000-0x0000000006F3A000-memory.dmp

Filesize
40KB

Download
memory/4576-171-0x00000000071D0000-0x0000000007220000-memory.dmp

Filesize
320KB

Download
memory/4576-172-0x0000000007500000-0x00000000076C2000-memory.dmp

Filesize
1.8MB

Download
memory/4576-179-0x00000000057C0000-0x00000000057D0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing