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 keylogger persistence stealer

Malware Config

Signatures

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

Snake Keylogger payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5008-146-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger

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:

Agents Letter.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	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-1-5-21-2295526160-1155304984-640977766-1000\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

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

Processes:

Agents Letter.exe

description pid process target process

PID 4468 set thread context of 5008 4468 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 5 IoCs

Processes:

powershell.exeAgents Letter.exeAgents Letter.exe

pid process

1080 powershell.exe
1080 powershell.exe
4468 Agents Letter.exe
4468 Agents Letter.exe
5008 Agents Letter.exe

flow	ioc
53	checkip.dyndns.org

description	pid	process	target process
PID 4468 set thread context of 5008	4468	Agents Letter.exe	Agents Letter.exe

pid	process
1080	powershell.exe
1080	powershell.exe
4468	Agents Letter.exe
4468	Agents Letter.exe
5008	Agents Letter.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Agents Letter.exepowershell.exeAgents Letter.exe

description	pid	process
Token: SeDebugPrivilege	4468	Agents Letter.exe
Token: SeDebugPrivilege	1080	powershell.exe
Token: SeDebugPrivilege	5008	Agents Letter.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

Agents Letter.exe

description	pid	process	target process
PID 4468 wrote to memory of 1080	4468	Agents Letter.exe	powershell.exe
PID 4468 wrote to memory of 1080	4468	Agents Letter.exe	powershell.exe
PID 4468 wrote to memory of 1080	4468	Agents Letter.exe	powershell.exe
PID 4468 wrote to memory of 428	4468	Agents Letter.exe	Agents Letter.exe
PID 4468 wrote to memory of 428	4468	Agents Letter.exe	Agents Letter.exe
PID 4468 wrote to memory of 428	4468	Agents Letter.exe	Agents Letter.exe
PID 4468 wrote to memory of 5008	4468	Agents Letter.exe	Agents Letter.exe
PID 4468 wrote to memory of 5008	4468	Agents Letter.exe	Agents Letter.exe
PID 4468 wrote to memory of 5008	4468	Agents Letter.exe	Agents Letter.exe
PID 4468 wrote to memory of 5008	4468	Agents Letter.exe	Agents Letter.exe
PID 4468 wrote to memory of 5008	4468	Agents Letter.exe	Agents Letter.exe
PID 4468 wrote to memory of 5008	4468	Agents Letter.exe	Agents Letter.exe
PID 4468 wrote to memory of 5008	4468	Agents Letter.exe	Agents Letter.exe
PID 4468 wrote to memory of 5008	4468	Agents Letter.exe	Agents Letter.exe

C:\Users\Admin\AppData\Local\Temp\Agents Letter.exe
"C:\Users\Admin\AppData\Local\Temp\Agents Letter.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:4468

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:1080

C:\Users\Admin\AppData\Local\Temp\Agents Letter.exe
"C:\Users\Admin\AppData\Local\Temp\Agents Letter.exe"
2⤵
PID:428

C:\Users\Admin\AppData\Local\Temp\Agents Letter.exe
"C:\Users\Admin\AppData\Local\Temp\Agents Letter.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:5008

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

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Agents Letter.exe.log
Filesize
1KB

MD5
026fb31495d30e5dbfd00f398c2efbf8

SHA1
9cda8f5f58129e4d592ca1b9867835c86f38ab1b

SHA256
b008f16eeae90b4c6ba119fb308616c0795cdaca51adf2b64470a0c01aeeb8b7

SHA512
6d1cc01c90613522cfb7be7ea67ff03732b367dfc7bfd245ad6d7ea8e5e5def431b3339d17893b7b193cee2c3b4c22a459acd3d852ee88fce711e30c5af195a1

Download Submit
memory/428-144-0x0000000000000000-mapping.dmp

Download
memory/1080-136-0x0000000000000000-mapping.dmp

Download
memory/1080-141-0x0000000005BF0000-0x0000000005C0E000-memory.dmp

Filesize
120KB

Download
memory/1080-143-0x0000000006190000-0x00000000061AA000-memory.dmp

Filesize
104KB

Download
memory/1080-137-0x00000000022E0000-0x0000000002316000-memory.dmp

Filesize
216KB

Download
memory/1080-138-0x0000000004F70000-0x0000000005598000-memory.dmp

Filesize
6.2MB

Download
memory/1080-139-0x0000000004D50000-0x0000000004DB6000-memory.dmp

Filesize
408KB

Download
memory/1080-140-0x00000000055A0000-0x0000000005606000-memory.dmp

Filesize
408KB

Download
memory/1080-142-0x00000000074F0000-0x0000000007B6A000-memory.dmp

Filesize
6.5MB

Download
memory/4468-135-0x0000000005ED0000-0x0000000005EF2000-memory.dmp

Filesize
136KB

Download
memory/4468-132-0x0000000000630000-0x00000000006A2000-memory.dmp

Filesize
456KB

Download
memory/4468-134-0x0000000006450000-0x00000000069F4000-memory.dmp

Filesize
5.6MB

Download
memory/4468-133-0x0000000005E00000-0x0000000005E92000-memory.dmp

Filesize
584KB

Download
memory/5008-145-0x0000000000000000-mapping.dmp

Download
memory/5008-146-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/5008-148-0x0000000005540000-0x00000000055DC000-memory.dmp

Filesize
624KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads