snakekeylogger | b1c89b167239238aea8a718d40751a1233ab4b9479b19e6feb86ed5a4c9aec20

General

Target

IMG_25579.pdf.exe
Size

1.4MB
MD5

5ab98f94682ec463f48cada8b9811055
SHA1

550fc889de33b94a63dfaf1138bcc54be489f767
SHA256

b1c89b167239238aea8a718d40751a1233ab4b9479b19e6feb86ed5a4c9aec20
SHA512

e3e4ed794ebf4bf3e246eab58699df4b822fdea5cab238b1a838c09b2d596a5228db934e631a843010df618e42524a32e7d4b750d536c9f20c827b78d71b87c6

Score

10^/10

snakekeylogger keylogger 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/488-26-0x000000000046370E-mapping.dmp	family_snakekeylogger
behavioral2/memory/488-30-0x0000000000810000-0x0000000000878000-memory.dmp	family_snakekeylogger

Executes dropped EXE 2 IoCs

Processes:

bsys.exeInstallUtil.exe

pid process

1316 bsys.exe
488 InstallUtil.exe
Drops startup file 1 IoCs

Processes:

IMG_25579.pdf.exe

description ioc process

File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bsys.lnk IMG_25579.pdf.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
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

20 freegeoip.app
16 checkip.dyndns.org
19 freegeoip.app
Suspicious use of SetThreadContext 1 IoCs

Processes:

bsys.exe

description pid process target process

PID 1316 set thread context of 488 1316 bsys.exe InstallUtil.exe

pid	process
1316	bsys.exe
488	InstallUtil.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bsys.lnk	IMG_25579.pdf.exe

flow	ioc
20	freegeoip.app
16	checkip.dyndns.org
19	freegeoip.app

description	pid	process	target process
PID 1316 set thread context of 488	1316	bsys.exe	InstallUtil.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

Processes:

IMG_25579.pdf.exebsys.exeInstallUtil.exe

pid	process
4020	IMG_25579.pdf.exe
4020	IMG_25579.pdf.exe
4020	IMG_25579.pdf.exe
4020	IMG_25579.pdf.exe
4020	IMG_25579.pdf.exe
4020	IMG_25579.pdf.exe
4020	IMG_25579.pdf.exe
4020	IMG_25579.pdf.exe
4020	IMG_25579.pdf.exe
4020	IMG_25579.pdf.exe
4020	IMG_25579.pdf.exe
4020	IMG_25579.pdf.exe
4020	IMG_25579.pdf.exe
4020	IMG_25579.pdf.exe
4020	IMG_25579.pdf.exe
4020	IMG_25579.pdf.exe
4020	IMG_25579.pdf.exe
1316	bsys.exe
1316	bsys.exe
488	InstallUtil.exe
488	InstallUtil.exe
488	InstallUtil.exe
488	InstallUtil.exe
488	InstallUtil.exe
488	InstallUtil.exe
488	InstallUtil.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

IMG_25579.pdf.exebsys.exeInstallUtil.exe

description pid process

Token: SeDebugPrivilege 4020 IMG_25579.pdf.exe
Token: SeDebugPrivilege 1316 bsys.exe
Token: SeDebugPrivilege 488 InstallUtil.exe

description	pid	process
Token: SeDebugPrivilege	4020	IMG_25579.pdf.exe
Token: SeDebugPrivilege	1316	bsys.exe
Token: SeDebugPrivilege	488	InstallUtil.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

IMG_25579.pdf.exebsys.exe

description	pid	process	target process
PID 4020 wrote to memory of 1316	4020	IMG_25579.pdf.exe	bsys.exe
PID 4020 wrote to memory of 1316	4020	IMG_25579.pdf.exe	bsys.exe
PID 4020 wrote to memory of 1316	4020	IMG_25579.pdf.exe	bsys.exe
PID 1316 wrote to memory of 488	1316	bsys.exe	InstallUtil.exe
PID 1316 wrote to memory of 488	1316	bsys.exe	InstallUtil.exe
PID 1316 wrote to memory of 488	1316	bsys.exe	InstallUtil.exe
PID 1316 wrote to memory of 488	1316	bsys.exe	InstallUtil.exe
PID 1316 wrote to memory of 488	1316	bsys.exe	InstallUtil.exe
PID 1316 wrote to memory of 488	1316	bsys.exe	InstallUtil.exe
PID 1316 wrote to memory of 488	1316	bsys.exe	InstallUtil.exe
PID 1316 wrote to memory of 488	1316	bsys.exe	InstallUtil.exe

C:\Users\Admin\AppData\Local\Temp\IMG_25579.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\IMG_25579.pdf.exe"
1⤵
- Drops startup file
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4020

C:\Users\Admin\bsys.exe
"C:\Users\Admin\bsys.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1316

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:488

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

3

T1081

Discovery

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\bsys.exe
MD5
5ab98f94682ec463f48cada8b9811055

SHA1
550fc889de33b94a63dfaf1138bcc54be489f767

SHA256
b1c89b167239238aea8a718d40751a1233ab4b9479b19e6feb86ed5a4c9aec20

SHA512
e3e4ed794ebf4bf3e246eab58699df4b822fdea5cab238b1a838c09b2d596a5228db934e631a843010df618e42524a32e7d4b750d536c9f20c827b78d71b87c6

Download Submit
C:\Users\Admin\bsys.exe
MD5
5ab98f94682ec463f48cada8b9811055

SHA1
550fc889de33b94a63dfaf1138bcc54be489f767

SHA256
b1c89b167239238aea8a718d40751a1233ab4b9479b19e6feb86ed5a4c9aec20

SHA512
e3e4ed794ebf4bf3e246eab58699df4b822fdea5cab238b1a838c09b2d596a5228db934e631a843010df618e42524a32e7d4b750d536c9f20c827b78d71b87c6

Download Submit
memory/488-26-0x000000000046370E-mapping.dmp

Download
memory/488-37-0x0000000005D60000-0x0000000005D61000-memory.dmp

Filesize
4KB

Download
memory/488-35-0x0000000005DC0000-0x0000000005DC1000-memory.dmp

Filesize
4KB

Download
memory/488-34-0x0000000004E50000-0x0000000004E51000-memory.dmp

Filesize
4KB

Download
memory/488-32-0x0000000005270000-0x0000000005271000-memory.dmp

Filesize
4KB

Download
memory/488-30-0x0000000000810000-0x0000000000878000-memory.dmp

Filesize
416KB

Download
memory/488-29-0x0000000073CA0000-0x000000007438E000-memory.dmp

Filesize
6.9MB

Download
memory/1316-21-0x0000000003140000-0x0000000003141000-memory.dmp

Filesize
4KB

Download
memory/1316-11-0x0000000000000000-mapping.dmp

Download
memory/1316-22-0x0000000008D50000-0x0000000008D5B000-memory.dmp

Filesize
44KB

Download
memory/1316-23-0x000000000C200000-0x000000000C201000-memory.dmp

Filesize
4KB

Download
memory/1316-24-0x0000000003141000-0x0000000003142000-memory.dmp

Filesize
4KB

Download
memory/1316-14-0x0000000073CA0000-0x000000007438E000-memory.dmp

Filesize
6.9MB

Download
memory/4020-10-0x00000000056C1000-0x00000000056C2000-memory.dmp

Filesize
4KB

Download
memory/4020-2-0x0000000073CA0000-0x000000007438E000-memory.dmp

Filesize
6.9MB

Download
memory/4020-9-0x00000000056C0000-0x00000000056C1000-memory.dmp

Filesize
4KB

Download
memory/4020-8-0x0000000007EF0000-0x0000000007EF1000-memory.dmp

Filesize
4KB

Download
memory/4020-7-0x0000000005450000-0x0000000005451000-memory.dmp

Filesize
4KB

Download
memory/4020-6-0x0000000002EE0000-0x0000000002EFE000-memory.dmp

Filesize
120KB

Download
memory/4020-5-0x0000000005520000-0x0000000005521000-memory.dmp

Filesize
4KB

Download
memory/4020-3-0x0000000000B70000-0x0000000000B71000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads