snakekeylogger | 13636e9795fdf0357c790acb8f35f012fa7b2be5434e40f727b99451d808487a

General

Target

file.exe
Size

1.4MB
MD5

8ef068e9992dfceee5aae9af836f1517
SHA1

e1847f65c16a0a29724b97e535c590897b278ec6
SHA256

13636e9795fdf0357c790acb8f35f012fa7b2be5434e40f727b99451d808487a
SHA512

41d9a68f04d681c02425b7f0adb8858da51fce657ce71edf975994c3eb2340d4501c903b92b21d9e4a67c3a0381fe9b5e171056c4b91df3709e3c72238e323ca

Score

10^/10

snakekeylogger keylogger persistence ransomware spyware stealer

Malware Config

Signatures

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

Snake Keylogger Payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3948-28-0x0000000000463E1E-mapping.dmp	family_snakekeylogger
behavioral2/memory/3948-32-0x0000000000540000-0x00000000005A8000-memory.dmp	family_snakekeylogger

Executes dropped EXE 2 IoCs

Processes:

nsou.exeInstallUtil.exe

pid process

1336 nsou.exe
3948 InstallUtil.exe
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware

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

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

Data from Local System
T1005

Credentials in Files
T1081

pid	process
1336	nsou.exe
3948	InstallUtil.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

reg.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\naets = "C:\\Users\\Admin\\AppData\\Roaming\\nsou.exe"	reg.exe
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe

Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

14 checkip.dyndns.org
17 freegeoip.app
18 freegeoip.app
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
ransomware

System Information Discovery
T1082
Suspicious use of SetThreadContext 1 IoCs

Processes:

nsou.exe

description pid process target process

PID 1336 set thread context of 3948 1336 nsou.exe InstallUtil.exe

flow	ioc
14	checkip.dyndns.org
17	freegeoip.app
18	freegeoip.app

description	pid	process	target process
PID 1336 set thread context of 3948	1336	nsou.exe	InstallUtil.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

Processes:

file.exensou.exeInstallUtil.exe

pid	process
640	file.exe
640	file.exe
640	file.exe
640	file.exe
640	file.exe
640	file.exe
640	file.exe
640	file.exe
640	file.exe
640	file.exe
640	file.exe
640	file.exe
640	file.exe
640	file.exe
640	file.exe
640	file.exe
640	file.exe
1336	nsou.exe
1336	nsou.exe
3948	InstallUtil.exe
3948	InstallUtil.exe
3948	InstallUtil.exe
3948	InstallUtil.exe
3948	InstallUtil.exe
3948	InstallUtil.exe
3948	InstallUtil.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

file.exensou.exeInstallUtil.exe

description pid process

Token: SeDebugPrivilege 640 file.exe
Token: SeDebugPrivilege 1336 nsou.exe
Token: SeDebugPrivilege 3948 InstallUtil.exe

description	pid	process
Token: SeDebugPrivilege	640	file.exe
Token: SeDebugPrivilege	1336	nsou.exe
Token: SeDebugPrivilege	3948	InstallUtil.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

file.execmd.exensou.exe

description	pid	process	target process
PID 640 wrote to memory of 200	640	file.exe	cmd.exe
PID 640 wrote to memory of 200	640	file.exe	cmd.exe
PID 640 wrote to memory of 200	640	file.exe	cmd.exe
PID 200 wrote to memory of 2204	200	cmd.exe	reg.exe
PID 200 wrote to memory of 2204	200	cmd.exe	reg.exe
PID 200 wrote to memory of 2204	200	cmd.exe	reg.exe
PID 640 wrote to memory of 1336	640	file.exe	nsou.exe
PID 640 wrote to memory of 1336	640	file.exe	nsou.exe
PID 640 wrote to memory of 1336	640	file.exe	nsou.exe
PID 1336 wrote to memory of 3948	1336	nsou.exe	InstallUtil.exe
PID 1336 wrote to memory of 3948	1336	nsou.exe	InstallUtil.exe
PID 1336 wrote to memory of 3948	1336	nsou.exe	InstallUtil.exe
PID 1336 wrote to memory of 3948	1336	nsou.exe	InstallUtil.exe
PID 1336 wrote to memory of 3948	1336	nsou.exe	InstallUtil.exe
PID 1336 wrote to memory of 3948	1336	nsou.exe	InstallUtil.exe
PID 1336 wrote to memory of 3948	1336	nsou.exe	InstallUtil.exe
PID 1336 wrote to memory of 3948	1336	nsou.exe	InstallUtil.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:640

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /c REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "naets" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\nsou.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:200

C:\Windows\SysWOW64\reg.exe
REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "naets" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\nsou.exe"
3⤵
- Adds Run key to start application
PID:2204

C:\Users\Admin\AppData\Roaming\nsou.exe
"C:\Users\Admin\AppData\Roaming\nsou.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1336

C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
"C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3948

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

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
MD5
91c9ae9c9a17a9db5e08b120e668c74c

SHA1
50770954c1ceb0bb6f1d5d3f2de2a0a065773723

SHA256
e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

SHA512
ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

Download Submit
C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
MD5
91c9ae9c9a17a9db5e08b120e668c74c

SHA1
50770954c1ceb0bb6f1d5d3f2de2a0a065773723

SHA256
e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

SHA512
ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

Download Submit
C:\Users\Admin\AppData\Roaming\nsou.exe
MD5
8ef068e9992dfceee5aae9af836f1517

SHA1
e1847f65c16a0a29724b97e535c590897b278ec6

SHA256
13636e9795fdf0357c790acb8f35f012fa7b2be5434e40f727b99451d808487a

SHA512
41d9a68f04d681c02425b7f0adb8858da51fce657ce71edf975994c3eb2340d4501c903b92b21d9e4a67c3a0381fe9b5e171056c4b91df3709e3c72238e323ca

Download Submit
C:\Users\Admin\AppData\Roaming\nsou.exe
MD5
8ef068e9992dfceee5aae9af836f1517

SHA1
e1847f65c16a0a29724b97e535c590897b278ec6

SHA256
13636e9795fdf0357c790acb8f35f012fa7b2be5434e40f727b99451d808487a

SHA512
41d9a68f04d681c02425b7f0adb8858da51fce657ce71edf975994c3eb2340d4501c903b92b21d9e4a67c3a0381fe9b5e171056c4b91df3709e3c72238e323ca

Download Submit
memory/200-10-0x0000000000000000-mapping.dmp

Download
memory/640-9-0x0000000002E10000-0x0000000002E11000-memory.dmp

Filesize
4KB

Download
memory/640-3-0x0000000000970000-0x0000000000971000-memory.dmp

Filesize
4KB

Download
memory/640-8-0x0000000007CE0000-0x0000000007CE1000-memory.dmp

Filesize
4KB

Download
memory/640-2-0x0000000073190000-0x000000007387E000-memory.dmp

Filesize
6.9MB

Download
memory/640-12-0x0000000002E11000-0x0000000002E12000-memory.dmp

Filesize
4KB

Download
memory/640-5-0x00000000053A0000-0x00000000053A1000-memory.dmp

Filesize
4KB

Download
memory/640-7-0x0000000002E00000-0x0000000002E01000-memory.dmp

Filesize
4KB

Download
memory/640-6-0x0000000002DE0000-0x0000000002DFE000-memory.dmp

Filesize
120KB

Download
memory/1336-13-0x0000000000000000-mapping.dmp

Download
memory/1336-16-0x0000000073190000-0x000000007387E000-memory.dmp

Filesize
6.9MB

Download
memory/1336-24-0x0000000008B60000-0x0000000008B6B000-memory.dmp

Filesize
44KB

Download
memory/1336-25-0x000000000C010000-0x000000000C011000-memory.dmp

Filesize
4KB

Download
memory/1336-26-0x00000000058A1000-0x00000000058A2000-memory.dmp

Filesize
4KB

Download
memory/1336-20-0x00000000058A0000-0x00000000058A1000-memory.dmp

Filesize
4KB

Download
memory/2204-11-0x0000000000000000-mapping.dmp

Download
memory/3948-28-0x0000000000463E1E-mapping.dmp

Download
memory/3948-31-0x0000000073190000-0x000000007387E000-memory.dmp

Filesize
6.9MB

Download
memory/3948-34-0x0000000005060000-0x0000000005061000-memory.dmp

Filesize
4KB

Download
memory/3948-32-0x0000000000540000-0x00000000005A8000-memory.dmp

Filesize
416KB

Download
memory/3948-36-0x0000000002530000-0x0000000002531000-memory.dmp

Filesize
4KB

Download
memory/3948-37-0x0000000005C70000-0x0000000005C71000-memory.dmp

Filesize
4KB

Download
memory/3948-39-0x0000000005F00000-0x0000000005F01000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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