snakekeylogger | 52188d1562d58dfd34a345ff60d01edfde8d86961a66ff0ebe6fabb1ced9e9a3

Analysis

max time kernel
111s
max time network
129s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
30/01/2023, 10:34

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General

Target
SOA.exe
Size 283KB
Sample230130-ml5lsabf5z
SHA256 52188d1562d58dfd34a345ff60d01edfde8d86961a66ff0ebe6fabb1ced9e9a3
MD5 5853e678e0a4ecf834561cd277ca81c7
SHA1 b7d401a37de653b02ecf4190ab1f6fd0e16f58f4
SHA512 093e9f5798e56261e2fca18ddc1e757b6bf0773b55a1177dfd18f79d77929fd705c44fe4261fa3915264d3872f57835f5fbdac9d6ac9b4a375212f6697dcc949
SSDEEP 6144:/Ya6dKmb8wWL9RIl5BIGKUtq2YHQFbTE6WQSYvjR23K8vNM110Gh:/YfLPWLRGhYw1TE67DvN268q0I
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

snakekeylogger collection keylogger persistence spyware stealer

Malware Config

Signatures

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

Snake Keylogger payload 1 IoCs

resource	yara_rule
behavioral2/memory/4592-140-0x0000000000400000-0x0000000000437000-memory.dmp	family_snakekeylogger

Executes dropped EXE 2 IoCs

pid	Process
4244	ynbcmshd.exe
4592	ynbcmshd.exe

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

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 stealer

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 stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ynbcmshd.exe
Key opened	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ynbcmshd.exe
Key opened	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ynbcmshd.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bexpbikdb = "C:\\Users\\Admin\\AppData\\Roaming\\hmnyoacrinrxn\\jbfprss.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\ynbcmshd.exe\" C:\\Users\\Admin\\AppData\\L"	ynbcmshd.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
8	checkip.dyndns.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4244 set thread context of 4592	4244	ynbcmshd.exe	83

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4592	ynbcmshd.exe
4592	ynbcmshd.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4244	ynbcmshd.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4592	ynbcmshd.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1980 wrote to memory of 4244	1980	SOA.exe	82
PID 1980 wrote to memory of 4244	1980	SOA.exe	82
PID 1980 wrote to memory of 4244	1980	SOA.exe	82
PID 4244 wrote to memory of 4592	4244	ynbcmshd.exe	83
PID 4244 wrote to memory of 4592	4244	ynbcmshd.exe	83
PID 4244 wrote to memory of 4592	4244	ynbcmshd.exe	83
PID 4244 wrote to memory of 4592	4244	ynbcmshd.exe	83

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ynbcmshd.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ynbcmshd.exe

C:\Users\Admin\AppData\Local\Temp\SOA.exe
"C:\Users\Admin\AppData\Local\Temp\SOA.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1980
- C:\Users\Admin\AppData\Local\Temp\ynbcmshd.exe
  "C:\Users\Admin\AppData\Local\Temp\ynbcmshd.exe" C:\Users\Admin\AppData\Local\Temp\cvkdcfzeu.olr
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:4244
- - C:\Users\Admin\AppData\Local\Temp\ynbcmshd.exe
    "C:\Users\Admin\AppData\Local\Temp\ynbcmshd.exe"
    3⤵
    - Executes dropped EXE
    - Accesses Microsoft Outlook profiles
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - outlook_office_path
    - outlook_win_path
    PID:4592

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

cvkdcfzeu.olr

Path C:\Users\Admin\AppData\Local\Temp\cvkdcfzeu.olr
Size 7KB
SHA256 eb972b885c2fe0da268c468f69fd0ca3a90f44090c3908898921dd58b380d88e
MD5 6ab7be5c6c4516164c11f09e68e7a42a
SHA1 441a97be6826b796571fee95bd30164db8a8027a
SHA512 f1017058b4ebaa97150988f325f4a2498f0af8fb123b57c7eb2206bcf9b4d87776395cee148b5a87955b896f2a7bd6c8a0d3a280b7f805a8ff9e0e59c7ffb125
SSDEEP 192:darcitQvArWiPvprb9XIuOUM696fbwhEU15LJLrLXC:uCYrNPvpvFT9y8hEU/JTy
MD5 SHA1 SHA512 SSDEEP

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ljvjuw.vg

Path C:\Users\Admin\AppData\Local\Temp\ljvjuw.vg
Size 225KB
SHA256 383c9350660c4a39287bfe142276b9b43a9ca03ec76f676c6e15a017dd3b6703
MD5 65f027b1604bba412796a76a7d57e4b8
SHA1 6283c3eb2bf37a6e63130a7e1c61b452869c0576
SHA512 7383dc1adaa4adc291eed4c1809031ba8ab73a699cc87ea2e7283561d98d49f3b242cbee8bf218dd09b6f2ff589598d252f5268775fac0ab40282602c6cdc727
SSDEEP 6144:YFbXu/280xG5Dox6H5m72qgYRuAk9ACNVJT1S:Y1Xue80Uc6Zmgftk
MD5 SHA1 SHA512 SSDEEP

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ynbcmshd.exe

Path C:\Users\Admin\AppData\Local\Temp\ynbcmshd.exe
Size 112KB
SHA256 679fe3f491392c0c0a28c9446cbfc8bc6a02726586177a8accb57808f2b5cb58
MD5 4aee74804fc524affcee0da4f9fd7546
SHA1 ada02a3047b60f70711b7807dc7444682d4606e6
SHA512 1ef87ffc436a93223238d9440589d9ae257ce0bd848f4683ff666798949a2949711ed9fec496ec2da3bde78fa47dd28d3c18826bfa7057758693faa78c10e3eb
SSDEEP 3072:xqsaIlE5i06/mAB3xGI5wrxXLkLsARHa6wwcXWiyvmIR3QCW3lzqfw:xqsO806//T5w17eH8XDCR
MD5 SHA1 SHA512 SSDEEP

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ynbcmshd.exe

Path C:\Users\Admin\AppData\Local\Temp\ynbcmshd.exe
Size 112KB
SHA256 679fe3f491392c0c0a28c9446cbfc8bc6a02726586177a8accb57808f2b5cb58
MD5 4aee74804fc524affcee0da4f9fd7546
SHA1 ada02a3047b60f70711b7807dc7444682d4606e6
SHA512 1ef87ffc436a93223238d9440589d9ae257ce0bd848f4683ff666798949a2949711ed9fec496ec2da3bde78fa47dd28d3c18826bfa7057758693faa78c10e3eb
SSDEEP 3072:xqsaIlE5i06/mAB3xGI5wrxXLkLsARHa6wwcXWiyvmIR3QCW3lzqfw:xqsO806//T5w17eH8XDCR
MD5 SHA1 SHA512 SSDEEP

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ynbcmshd.exe

Path C:\Users\Admin\AppData\Local\Temp\ynbcmshd.exe
Size 112KB
SHA256 679fe3f491392c0c0a28c9446cbfc8bc6a02726586177a8accb57808f2b5cb58
MD5 4aee74804fc524affcee0da4f9fd7546
SHA1 ada02a3047b60f70711b7807dc7444682d4606e6
SHA512 1ef87ffc436a93223238d9440589d9ae257ce0bd848f4683ff666798949a2949711ed9fec496ec2da3bde78fa47dd28d3c18826bfa7057758693faa78c10e3eb
SSDEEP 3072:xqsaIlE5i06/mAB3xGI5wrxXLkLsARHa6wwcXWiyvmIR3QCW3lzqfw:xqsO806//T5w17eH8XDCR
MD5 SHA1 SHA512 SSDEEP

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memory/4592-139-0x0000000004850000-0x0000000004DF4000-memory.dmp

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memory/4592-140-0x0000000000400000-0x0000000000437000-memory.dmp

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memory/4592-141-0x0000000004E40000-0x0000000004EDC000-memory.dmp

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memory/4592-142-0x0000000005B50000-0x0000000005D12000-memory.dmp

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memory/4592-143-0x0000000005D20000-0x0000000005DB2000-memory.dmp

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memory/4592-144-0x0000000005F20000-0x0000000005F2A000-memory.dmp

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