snakekeylogger | 6b1ee9252cc101156e585e7cd6c59ea3850a010c57a7f1b1915d5438cbc5b4de

General

Target

Agents Letter.exe
Size

430KB
MD5

2c27fdafaa47f61b79d8b5513c8e4d23
SHA1

262e6cb688ad062bdde2b6702871a5a07e4409f4
SHA256

6b1ee9252cc101156e585e7cd6c59ea3850a010c57a7f1b1915d5438cbc5b4de
SHA512

d3fdfb89c23329e36a2c043a8159bf8816e2a0c8df432dc407f9c45f3c8b1f2c719c9a57c028ed7c81154c72fcb66147c223d25c73ef77a66a9114024444aa24
SSDEEP

3072:w9Op4I8ZZpSOs4PNdvr+1UjTsvY3h4I5UWIDRRineV3Kap/ObYOOt7POITGCotdK:WIMZUOJpq1B4UhDqe5pmboNNPonA4

Score

10^/10

snakekeylogger collection keylogger persistence spyware stealer

Malware Config

Signatures

Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
stealer keylogger snakekeylogger

Snake Keylogger payload 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1732-65-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1732-67-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1732-68-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1732-71-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1732-73-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1732-69-0x000000000042072E-mapping.dmp	family_snakekeylogger

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

Processes:

Agents Letter.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Agents Letter.exe
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Agents Letter.exe
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Agents Letter.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Agents Letter.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\Yndvivvuap = "\"C:\\Users\\Admin\\AppData\\Roaming\\Ugysow\\Yndvivvuap.exe\""	Agents Letter.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.

Processes:

flow ioc

7 checkip.dyndns.org
Suspicious use of SetThreadContext 1 IoCs

Processes:

Agents Letter.exe

description pid process target process

PID 1692 set thread context of 1732 1692 Agents Letter.exe Agents Letter.exe
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 3 IoCs

Processes:

powershell.exeAgents Letter.exe

pid process

1120 powershell.exe
1732 Agents Letter.exe
1732 Agents Letter.exe

flow	ioc
7	checkip.dyndns.org

description	pid	process	target process
PID 1692 set thread context of 1732	1692	Agents Letter.exe	Agents Letter.exe

pid	process
1120	powershell.exe
1732	Agents Letter.exe
1732	Agents Letter.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Agents Letter.exepowershell.exeAgents Letter.exe

description	pid	process
Token: SeDebugPrivilege	1692	Agents Letter.exe
Token: SeDebugPrivilege	1120	powershell.exe
Token: SeDebugPrivilege	1732	Agents Letter.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

Agents Letter.exe

description	pid	process	target process
PID 1692 wrote to memory of 1120	1692	Agents Letter.exe	powershell.exe
PID 1692 wrote to memory of 1120	1692	Agents Letter.exe	powershell.exe
PID 1692 wrote to memory of 1120	1692	Agents Letter.exe	powershell.exe
PID 1692 wrote to memory of 1120	1692	Agents Letter.exe	powershell.exe
PID 1692 wrote to memory of 1732	1692	Agents Letter.exe	Agents Letter.exe
PID 1692 wrote to memory of 1732	1692	Agents Letter.exe	Agents Letter.exe
PID 1692 wrote to memory of 1732	1692	Agents Letter.exe	Agents Letter.exe
PID 1692 wrote to memory of 1732	1692	Agents Letter.exe	Agents Letter.exe
PID 1692 wrote to memory of 1732	1692	Agents Letter.exe	Agents Letter.exe
PID 1692 wrote to memory of 1732	1692	Agents Letter.exe	Agents Letter.exe
PID 1692 wrote to memory of 1732	1692	Agents Letter.exe	Agents Letter.exe
PID 1692 wrote to memory of 1732	1692	Agents Letter.exe	Agents Letter.exe
PID 1692 wrote to memory of 1732	1692	Agents Letter.exe	Agents Letter.exe
PID 1692 wrote to memory of 1732	1692	Agents Letter.exe	Agents Letter.exe
PID 1692 wrote to memory of 1732	1692	Agents Letter.exe	Agents Letter.exe
PID 1692 wrote to memory of 1732	1692	Agents Letter.exe	Agents Letter.exe

outlook_office_path 1 IoCs

Processes:

Agents Letter.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Agents Letter.exe

outlook_win_path 1 IoCs

Processes:

Agents Letter.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Agents Letter.exe

C:\Users\Admin\AppData\Local\Temp\Agents Letter.exe
"C:\Users\Admin\AppData\Local\Temp\Agents Letter.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1692

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMwAwAA==
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1120

C:\Users\Admin\AppData\Local\Temp\Agents Letter.exe
"C:\Users\Admin\AppData\Local\Temp\Agents Letter.exe"
2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:1732

Network

MITRE ATT&CK Matrix ATT&CK 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

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

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Downloads

memory/1120-61-0x000000006E280000-0x000000006E82B000-memory.dmp

Filesize
5.7MB

Download
memory/1120-57-0x0000000000000000-mapping.dmp

Download
memory/1120-59-0x000000006E280000-0x000000006E82B000-memory.dmp

Filesize
5.7MB

Download
memory/1120-60-0x000000006E280000-0x000000006E82B000-memory.dmp

Filesize
5.7MB

Download
memory/1692-54-0x00000000011D0000-0x0000000001242000-memory.dmp

Filesize
456KB

Download
memory/1692-56-0x0000000005B60000-0x0000000005D68000-memory.dmp

Filesize
2.0MB

Download
memory/1692-55-0x0000000075A81000-0x0000000075A83000-memory.dmp

Filesize
8KB

Download
memory/1732-63-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1732-62-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1732-65-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1732-67-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1732-68-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1732-71-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1732-73-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1732-69-0x000000000042072E-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads