snakekeylogger | f9a8ba23f68d57179f1a480b6207351d5f41e6303fbdd09f6fffd514f82bef30

General

Target

IMG_04017.pdf.exe
Size

1.4MB
MD5

9b2bde9769d02bac7e022ff7a36010e5
SHA1

6fccab4bc46e3d93fed12733ad3ed2d9d9edb8a1
SHA256

f9a8ba23f68d57179f1a480b6207351d5f41e6303fbdd09f6fffd514f82bef30
SHA512

a9bcfd2cae4f7f206679922a80f9cb39cf49d1897ce0303dd39bcecaddba92e7bbfa4602d074743db103f48cf9bf94b85f1d2ec52dce9d7297f94c77b0ba9b63

Score

10^/10

snakekeylogger keylogger 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/1724-26-0x000000000046381E-mapping.dmp	family_snakekeylogger
behavioral2/memory/1724-30-0x0000000000380000-0x00000000003E8000-memory.dmp	family_snakekeylogger

Executes dropped EXE 2 IoCs

Processes:

bsys.exeInstallUtil.exe

pid process

2084 bsys.exe
1724 InstallUtil.exe
Drops startup file 1 IoCs

Processes:

IMG_04017.pdf.exe

description ioc process

File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bsys.lnk IMG_04017.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

15 checkip.dyndns.org
18 freegeoip.app
19 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:

bsys.exe

description pid process target process

PID 2084 set thread context of 1724 2084 bsys.exe InstallUtil.exe

pid	process
2084	bsys.exe
1724	InstallUtil.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bsys.lnk	IMG_04017.pdf.exe

flow	ioc
15	checkip.dyndns.org
18	freegeoip.app
19	freegeoip.app

description	pid	process	target process
PID 2084 set thread context of 1724	2084	bsys.exe	InstallUtil.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

Processes:

IMG_04017.pdf.exebsys.exeInstallUtil.exe

pid	process
4724	IMG_04017.pdf.exe
4724	IMG_04017.pdf.exe
4724	IMG_04017.pdf.exe
4724	IMG_04017.pdf.exe
4724	IMG_04017.pdf.exe
4724	IMG_04017.pdf.exe
4724	IMG_04017.pdf.exe
4724	IMG_04017.pdf.exe
4724	IMG_04017.pdf.exe
4724	IMG_04017.pdf.exe
4724	IMG_04017.pdf.exe
4724	IMG_04017.pdf.exe
4724	IMG_04017.pdf.exe
4724	IMG_04017.pdf.exe
4724	IMG_04017.pdf.exe
4724	IMG_04017.pdf.exe
4724	IMG_04017.pdf.exe
2084	bsys.exe
2084	bsys.exe
1724	InstallUtil.exe
1724	InstallUtil.exe
1724	InstallUtil.exe
1724	InstallUtil.exe
1724	InstallUtil.exe
1724	InstallUtil.exe
1724	InstallUtil.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

IMG_04017.pdf.exebsys.exeInstallUtil.exe

description pid process

Token: SeDebugPrivilege 4724 IMG_04017.pdf.exe
Token: SeDebugPrivilege 2084 bsys.exe
Token: SeDebugPrivilege 1724 InstallUtil.exe

description	pid	process
Token: SeDebugPrivilege	4724	IMG_04017.pdf.exe
Token: SeDebugPrivilege	2084	bsys.exe
Token: SeDebugPrivilege	1724	InstallUtil.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

IMG_04017.pdf.exebsys.exe

description	pid	process	target process
PID 4724 wrote to memory of 2084	4724	IMG_04017.pdf.exe	bsys.exe
PID 4724 wrote to memory of 2084	4724	IMG_04017.pdf.exe	bsys.exe
PID 4724 wrote to memory of 2084	4724	IMG_04017.pdf.exe	bsys.exe
PID 2084 wrote to memory of 1724	2084	bsys.exe	InstallUtil.exe
PID 2084 wrote to memory of 1724	2084	bsys.exe	InstallUtil.exe
PID 2084 wrote to memory of 1724	2084	bsys.exe	InstallUtil.exe
PID 2084 wrote to memory of 1724	2084	bsys.exe	InstallUtil.exe
PID 2084 wrote to memory of 1724	2084	bsys.exe	InstallUtil.exe
PID 2084 wrote to memory of 1724	2084	bsys.exe	InstallUtil.exe
PID 2084 wrote to memory of 1724	2084	bsys.exe	InstallUtil.exe
PID 2084 wrote to memory of 1724	2084	bsys.exe	InstallUtil.exe

C:\Users\Admin\AppData\Local\Temp\IMG_04017.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\IMG_04017.pdf.exe"
1⤵
- Drops startup file
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4724

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:2084

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:1724

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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\bsys.exe
MD5
9b2bde9769d02bac7e022ff7a36010e5

SHA1
6fccab4bc46e3d93fed12733ad3ed2d9d9edb8a1

SHA256
f9a8ba23f68d57179f1a480b6207351d5f41e6303fbdd09f6fffd514f82bef30

SHA512
a9bcfd2cae4f7f206679922a80f9cb39cf49d1897ce0303dd39bcecaddba92e7bbfa4602d074743db103f48cf9bf94b85f1d2ec52dce9d7297f94c77b0ba9b63

Download Submit
C:\Users\Admin\bsys.exe
MD5
9b2bde9769d02bac7e022ff7a36010e5

SHA1
6fccab4bc46e3d93fed12733ad3ed2d9d9edb8a1

SHA256
f9a8ba23f68d57179f1a480b6207351d5f41e6303fbdd09f6fffd514f82bef30

SHA512
a9bcfd2cae4f7f206679922a80f9cb39cf49d1897ce0303dd39bcecaddba92e7bbfa4602d074743db103f48cf9bf94b85f1d2ec52dce9d7297f94c77b0ba9b63

Download Submit
memory/1724-26-0x000000000046381E-mapping.dmp

Download
memory/1724-37-0x0000000005D20000-0x0000000005D21000-memory.dmp

Filesize
4KB

Download
memory/1724-35-0x0000000005D90000-0x0000000005D91000-memory.dmp

Filesize
4KB

Download
memory/1724-34-0x0000000004D40000-0x0000000004D41000-memory.dmp

Filesize
4KB

Download
memory/1724-32-0x0000000005100000-0x0000000005101000-memory.dmp

Filesize
4KB

Download
memory/1724-30-0x0000000000380000-0x00000000003E8000-memory.dmp

Filesize
416KB

Download
memory/1724-29-0x0000000073530000-0x0000000073C1E000-memory.dmp

Filesize
6.9MB

Download
memory/2084-21-0x0000000005760000-0x0000000005761000-memory.dmp

Filesize
4KB

Download
memory/2084-11-0x0000000000000000-mapping.dmp

Download
memory/2084-22-0x0000000008150000-0x000000000815B000-memory.dmp

Filesize
44KB

Download
memory/2084-23-0x000000000BFD0000-0x000000000BFD1000-memory.dmp

Filesize
4KB

Download
memory/2084-24-0x0000000005761000-0x0000000005762000-memory.dmp

Filesize
4KB

Download
memory/2084-14-0x0000000073530000-0x0000000073C1E000-memory.dmp

Filesize
6.9MB

Download
memory/4724-10-0x0000000001971000-0x0000000001972000-memory.dmp

Filesize
4KB

Download
memory/4724-2-0x0000000073530000-0x0000000073C1E000-memory.dmp

Filesize
6.9MB

Download
memory/4724-9-0x0000000001970000-0x0000000001971000-memory.dmp

Filesize
4KB

Download
memory/4724-8-0x00000000082A0000-0x00000000082A1000-memory.dmp

Filesize
4KB

Download
memory/4724-7-0x0000000001730000-0x0000000001731000-memory.dmp

Filesize
4KB

Download
memory/4724-6-0x0000000001940000-0x000000000195E000-memory.dmp

Filesize
120KB

Download
memory/4724-5-0x00000000059C0000-0x00000000059C1000-memory.dmp

Filesize
4KB

Download
memory/4724-3-0x0000000000F20000-0x0000000000F21000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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