snakekeylogger | 67f3cc2b3a57590f2e4bb1e496a0b2d0da8cece64efc73da021c9c0bde2c6f9c

General

Target

IMG_5371.EXE
Size

1.4MB
MD5

dab644bd40ca9f103fcbdd74ebe39a2d
SHA1

f3c2aacc1c81f58e9975f4e89fab04ebd1d87377
SHA256

67f3cc2b3a57590f2e4bb1e496a0b2d0da8cece64efc73da021c9c0bde2c6f9c
SHA512

2fd1b216531e27ab66ea47f51a9d58fcb5a342937109d07df881c346384e369835655bd6e2fcbe284a8fc72757542e446f495271c9df9c0533a22640f3d55ac0

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/4052-28-0x000000000046381E-mapping.dmp	family_snakekeylogger
behavioral2/memory/4052-32-0x0000000000700000-0x0000000000768000-memory.dmp	family_snakekeylogger

Executes dropped EXE 2 IoCs

Processes:

nsou.exeInstallUtil.exe

pid process

1872 nsou.exe
4052 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
1872	nsou.exe
4052	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-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\naets = "C:\\Users\\Admin\\AppData\\Roaming\\nsou.exe"	reg.exe
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\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

22 checkip.dyndns.org
25 freegeoip.app
26 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 1872 set thread context of 4052 1872 nsou.exe InstallUtil.exe

flow	ioc
22	checkip.dyndns.org
25	freegeoip.app
26	freegeoip.app

description	pid	process	target process
PID 1872 set thread context of 4052	1872	nsou.exe	InstallUtil.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

Processes:

IMG_5371.EXEnsou.exeInstallUtil.exe

pid	process
4648	IMG_5371.EXE
4648	IMG_5371.EXE
4648	IMG_5371.EXE
4648	IMG_5371.EXE
4648	IMG_5371.EXE
4648	IMG_5371.EXE
4648	IMG_5371.EXE
4648	IMG_5371.EXE
4648	IMG_5371.EXE
4648	IMG_5371.EXE
4648	IMG_5371.EXE
4648	IMG_5371.EXE
4648	IMG_5371.EXE
4648	IMG_5371.EXE
4648	IMG_5371.EXE
4648	IMG_5371.EXE
4648	IMG_5371.EXE
1872	nsou.exe
1872	nsou.exe
4052	InstallUtil.exe
4052	InstallUtil.exe
4052	InstallUtil.exe
4052	InstallUtil.exe
4052	InstallUtil.exe
4052	InstallUtil.exe
4052	InstallUtil.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

IMG_5371.EXEnsou.exeInstallUtil.exe

description pid process

Token: SeDebugPrivilege 4648 IMG_5371.EXE
Token: SeDebugPrivilege 1872 nsou.exe
Token: SeDebugPrivilege 4052 InstallUtil.exe

description	pid	process
Token: SeDebugPrivilege	4648	IMG_5371.EXE
Token: SeDebugPrivilege	1872	nsou.exe
Token: SeDebugPrivilege	4052	InstallUtil.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

IMG_5371.EXEcmd.exensou.exe

description	pid	process	target process
PID 4648 wrote to memory of 4172	4648	IMG_5371.EXE	cmd.exe
PID 4648 wrote to memory of 4172	4648	IMG_5371.EXE	cmd.exe
PID 4648 wrote to memory of 4172	4648	IMG_5371.EXE	cmd.exe
PID 4172 wrote to memory of 3880	4172	cmd.exe	reg.exe
PID 4172 wrote to memory of 3880	4172	cmd.exe	reg.exe
PID 4172 wrote to memory of 3880	4172	cmd.exe	reg.exe
PID 4648 wrote to memory of 1872	4648	IMG_5371.EXE	nsou.exe
PID 4648 wrote to memory of 1872	4648	IMG_5371.EXE	nsou.exe
PID 4648 wrote to memory of 1872	4648	IMG_5371.EXE	nsou.exe
PID 1872 wrote to memory of 4052	1872	nsou.exe	InstallUtil.exe
PID 1872 wrote to memory of 4052	1872	nsou.exe	InstallUtil.exe
PID 1872 wrote to memory of 4052	1872	nsou.exe	InstallUtil.exe
PID 1872 wrote to memory of 4052	1872	nsou.exe	InstallUtil.exe
PID 1872 wrote to memory of 4052	1872	nsou.exe	InstallUtil.exe
PID 1872 wrote to memory of 4052	1872	nsou.exe	InstallUtil.exe
PID 1872 wrote to memory of 4052	1872	nsou.exe	InstallUtil.exe
PID 1872 wrote to memory of 4052	1872	nsou.exe	InstallUtil.exe

C:\Users\Admin\AppData\Local\Temp\IMG_5371.EXE
"C:\Users\Admin\AppData\Local\Temp\IMG_5371.EXE"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4648

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:4172

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:3880

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:1872

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:4052

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
dab644bd40ca9f103fcbdd74ebe39a2d

SHA1
f3c2aacc1c81f58e9975f4e89fab04ebd1d87377

SHA256
67f3cc2b3a57590f2e4bb1e496a0b2d0da8cece64efc73da021c9c0bde2c6f9c

SHA512
2fd1b216531e27ab66ea47f51a9d58fcb5a342937109d07df881c346384e369835655bd6e2fcbe284a8fc72757542e446f495271c9df9c0533a22640f3d55ac0

Download Submit
C:\Users\Admin\AppData\Roaming\nsou.exe
MD5
dab644bd40ca9f103fcbdd74ebe39a2d

SHA1
f3c2aacc1c81f58e9975f4e89fab04ebd1d87377

SHA256
67f3cc2b3a57590f2e4bb1e496a0b2d0da8cece64efc73da021c9c0bde2c6f9c

SHA512
2fd1b216531e27ab66ea47f51a9d58fcb5a342937109d07df881c346384e369835655bd6e2fcbe284a8fc72757542e446f495271c9df9c0533a22640f3d55ac0

Download Submit
memory/1872-26-0x0000000005321000-0x0000000005322000-memory.dmp

Filesize
4KB

Download
memory/1872-25-0x000000000BD50000-0x000000000BD51000-memory.dmp

Filesize
4KB

Download
memory/1872-24-0x00000000088A0000-0x00000000088AB000-memory.dmp

Filesize
44KB

Download
memory/1872-23-0x0000000005320000-0x0000000005321000-memory.dmp

Filesize
4KB

Download
memory/1872-16-0x0000000073E30000-0x000000007451E000-memory.dmp

Filesize
6.9MB

Download
memory/1872-13-0x0000000000000000-mapping.dmp

Download
memory/3880-11-0x0000000000000000-mapping.dmp

Download
memory/4052-28-0x000000000046381E-mapping.dmp

Download
memory/4052-31-0x0000000073E30000-0x000000007451E000-memory.dmp

Filesize
6.9MB

Download
memory/4052-39-0x0000000005D70000-0x0000000005D71000-memory.dmp

Filesize
4KB

Download
memory/4052-37-0x0000000005E10000-0x0000000005E11000-memory.dmp

Filesize
4KB

Download
memory/4052-36-0x0000000004D70000-0x0000000004D71000-memory.dmp

Filesize
4KB

Download
memory/4052-34-0x00000000051C0000-0x00000000051C1000-memory.dmp

Filesize
4KB

Download
memory/4052-32-0x0000000000700000-0x0000000000768000-memory.dmp

Filesize
416KB

Download
memory/4172-10-0x0000000000000000-mapping.dmp

Download
memory/4648-8-0x00000000051F0000-0x00000000051F1000-memory.dmp

Filesize
4KB

Download
memory/4648-3-0x00000000007C0000-0x00000000007C1000-memory.dmp

Filesize
4KB

Download
memory/4648-5-0x0000000005110000-0x0000000005111000-memory.dmp

Filesize
4KB

Download
memory/4648-2-0x0000000073E30000-0x000000007451E000-memory.dmp

Filesize
6.9MB

Download
memory/4648-6-0x0000000005320000-0x0000000005321000-memory.dmp

Filesize
4KB

Download
memory/4648-7-0x00000000050F0000-0x000000000510E000-memory.dmp

Filesize
120KB

Download
memory/4648-12-0x0000000005321000-0x0000000005322000-memory.dmp

Filesize
4KB

Download
memory/4648-9-0x0000000007B50000-0x0000000007B51000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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