snakekeylogger | ae33318e53652eda0917a4f856ecf0041d8f57b73bf82bc6322921ea16654a04

General

Target

IMG_40317.pdf.exe
Size

1.4MB
MD5

9da79ca571b3427fbd82003b94ee08d2
SHA1

3e00a65e6f87ffe3d210e41fe0fef1017be59d9b
SHA256

ae33318e53652eda0917a4f856ecf0041d8f57b73bf82bc6322921ea16654a04
SHA512

033edcb711c8c38de1f0acdbca86d1e624602c4c052773a06bb5145ec80f77a42407b072d2c36454878b6f6e1a026d0ce5cca0e5f7e2688ee2e5c9d3918fb945

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/384-25-0x0000000000400000-0x0000000000468000-memory.dmp	family_snakekeylogger
behavioral2/memory/384-26-0x000000000046240E-mapping.dmp	family_snakekeylogger

Executes dropped EXE 2 IoCs

Processes:

bsys.exeInstallUtil.exe

pid process

4576 bsys.exe
384 InstallUtil.exe
Drops startup file 1 IoCs

Processes:

IMG_40317.pdf.exe

description ioc process

File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bsys.lnk IMG_40317.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

18 checkip.dyndns.org
21 freegeoip.app
22 freegeoip.app
Suspicious use of SetThreadContext 1 IoCs

Processes:

bsys.exe

description pid process target process

PID 4576 set thread context of 384 4576 bsys.exe InstallUtil.exe

pid	process
4576	bsys.exe
384	InstallUtil.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bsys.lnk	IMG_40317.pdf.exe

flow	ioc
18	checkip.dyndns.org
21	freegeoip.app
22	freegeoip.app

description	pid	process	target process
PID 4576 set thread context of 384	4576	bsys.exe	InstallUtil.exe

Suspicious behavior: EnumeratesProcesses 20 IoCs

Processes:

IMG_40317.pdf.exebsys.exeInstallUtil.exe

pid	process
4772	IMG_40317.pdf.exe
4772	IMG_40317.pdf.exe
4772	IMG_40317.pdf.exe
4772	IMG_40317.pdf.exe
4772	IMG_40317.pdf.exe
4772	IMG_40317.pdf.exe
4772	IMG_40317.pdf.exe
4772	IMG_40317.pdf.exe
4772	IMG_40317.pdf.exe
4772	IMG_40317.pdf.exe
4772	IMG_40317.pdf.exe
4772	IMG_40317.pdf.exe
4772	IMG_40317.pdf.exe
4772	IMG_40317.pdf.exe
4772	IMG_40317.pdf.exe
4772	IMG_40317.pdf.exe
4772	IMG_40317.pdf.exe
4576	bsys.exe
4576	bsys.exe
384	InstallUtil.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

IMG_40317.pdf.exebsys.exeInstallUtil.exe

description pid process

Token: SeDebugPrivilege 4772 IMG_40317.pdf.exe
Token: SeDebugPrivilege 4576 bsys.exe
Token: SeDebugPrivilege 384 InstallUtil.exe

description	pid	process
Token: SeDebugPrivilege	4772	IMG_40317.pdf.exe
Token: SeDebugPrivilege	4576	bsys.exe
Token: SeDebugPrivilege	384	InstallUtil.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

IMG_40317.pdf.exebsys.exe

description	pid	process	target process
PID 4772 wrote to memory of 4576	4772	IMG_40317.pdf.exe	bsys.exe
PID 4772 wrote to memory of 4576	4772	IMG_40317.pdf.exe	bsys.exe
PID 4772 wrote to memory of 4576	4772	IMG_40317.pdf.exe	bsys.exe
PID 4576 wrote to memory of 384	4576	bsys.exe	InstallUtil.exe
PID 4576 wrote to memory of 384	4576	bsys.exe	InstallUtil.exe
PID 4576 wrote to memory of 384	4576	bsys.exe	InstallUtil.exe
PID 4576 wrote to memory of 384	4576	bsys.exe	InstallUtil.exe
PID 4576 wrote to memory of 384	4576	bsys.exe	InstallUtil.exe
PID 4576 wrote to memory of 384	4576	bsys.exe	InstallUtil.exe
PID 4576 wrote to memory of 384	4576	bsys.exe	InstallUtil.exe
PID 4576 wrote to memory of 384	4576	bsys.exe	InstallUtil.exe

C:\Users\Admin\AppData\Local\Temp\IMG_40317.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\IMG_40317.pdf.exe"
1⤵
- Drops startup file
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4772

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:4576

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:384

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
9da79ca571b3427fbd82003b94ee08d2

SHA1
3e00a65e6f87ffe3d210e41fe0fef1017be59d9b

SHA256
ae33318e53652eda0917a4f856ecf0041d8f57b73bf82bc6322921ea16654a04

SHA512
033edcb711c8c38de1f0acdbca86d1e624602c4c052773a06bb5145ec80f77a42407b072d2c36454878b6f6e1a026d0ce5cca0e5f7e2688ee2e5c9d3918fb945

Download Submit
C:\Users\Admin\bsys.exe
MD5
9da79ca571b3427fbd82003b94ee08d2

SHA1
3e00a65e6f87ffe3d210e41fe0fef1017be59d9b

SHA256
ae33318e53652eda0917a4f856ecf0041d8f57b73bf82bc6322921ea16654a04

SHA512
033edcb711c8c38de1f0acdbca86d1e624602c4c052773a06bb5145ec80f77a42407b072d2c36454878b6f6e1a026d0ce5cca0e5f7e2688ee2e5c9d3918fb945

Download Submit
memory/384-25-0x0000000000400000-0x0000000000468000-memory.dmp

Filesize
416KB

Download
memory/384-37-0x0000000005210000-0x0000000005211000-memory.dmp

Filesize
4KB

Download
memory/384-36-0x0000000006090000-0x0000000006091000-memory.dmp

Filesize
4KB

Download
memory/384-34-0x0000000006110000-0x0000000006111000-memory.dmp

Filesize
4KB

Download
memory/384-32-0x0000000005580000-0x0000000005581000-memory.dmp

Filesize
4KB

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memory/384-29-0x0000000073370000-0x0000000073A5E000-memory.dmp

Filesize
6.9MB

Download
memory/384-26-0x000000000046240E-mapping.dmp

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memory/4576-21-0x0000000005230000-0x0000000005231000-memory.dmp

Filesize
4KB

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memory/4576-11-0x0000000000000000-mapping.dmp

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memory/4576-22-0x0000000008560000-0x000000000856B000-memory.dmp

Filesize
44KB

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memory/4576-23-0x0000000004980000-0x0000000004981000-memory.dmp

Filesize
4KB

Download
memory/4576-24-0x0000000005231000-0x0000000005232000-memory.dmp

Filesize
4KB

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memory/4576-14-0x0000000073370000-0x0000000073A5E000-memory.dmp

Filesize
6.9MB

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memory/4772-10-0x0000000004BE1000-0x0000000004BE2000-memory.dmp

Filesize
4KB

Download
memory/4772-2-0x0000000073370000-0x0000000073A5E000-memory.dmp

Filesize
6.9MB

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memory/4772-9-0x0000000004BE0000-0x0000000004BE1000-memory.dmp

Filesize
4KB

Download
memory/4772-8-0x0000000007410000-0x0000000007411000-memory.dmp

Filesize
4KB

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memory/4772-7-0x00000000049A0000-0x00000000049A1000-memory.dmp

Filesize
4KB

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memory/4772-6-0x0000000004980000-0x000000000499E000-memory.dmp

Filesize
120KB

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memory/4772-5-0x0000000004A70000-0x0000000004A71000-memory.dmp

Filesize
4KB

Download
memory/4772-3-0x00000000000C0000-0x00000000000C1000-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