Analysis
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max time kernel
117s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20231020-en -
resource tags
arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system -
submitted
27-11-2023 11:08
Static task
static1
Behavioral task
behavioral1
Sample
Halkbank_Ekstre_20231127_093256_734631.pdf.exe
Resource
win7-20231020-en
Behavioral task
behavioral2
Sample
Halkbank_Ekstre_20231127_093256_734631.pdf.exe
Resource
win10v2004-20231020-en
General
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Target
Halkbank_Ekstre_20231127_093256_734631.pdf.exe
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Size
643KB
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MD5
f5c860c3291dfdd1e53d616d4e237afb
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SHA1
c2727013047c56dc71300bd0bc7f5bc84ef5e7cb
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SHA256
77224cecffb3caa25a9a6da433aef450f32e9ef67af70669b4ddd7a92c24c2ca
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SHA512
fd7130389abf2ef10c7c33888e60838bee488a3119ca1f31915c60c9cd98baa470e64499e9b853c1af5290f4a9a83a1783877073228c3eedb915b2e70f3134b7
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SSDEEP
12288:nxB2Q8fm/xBew2uQAylI3ifmihK3gGuXBH19Uwd7BR6wT:nxBHxIP/zzKZuLWwpB
Malware Config
Signatures
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Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
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Snake Keylogger payload 6 IoCs
Processes:
resource yara_rule behavioral1/memory/1288-11-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/1288-13-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/1288-17-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/1288-19-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/1288-21-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/1288-24-0x0000000004C60000-0x0000000004CA0000-memory.dmp family_snakekeylogger -
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
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Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
Processes:
Halkbank_Ekstre_20231127_093256_734631.pdf.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-2952504676-3105837840-1406404655-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Key opened \REGISTRY\USER\S-1-5-21-2952504676-3105837840-1406404655-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Key opened \REGISTRY\USER\S-1-5-21-2952504676-3105837840-1406404655-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 Halkbank_Ekstre_20231127_093256_734631.pdf.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.
Processes:
flow ioc 4 checkip.dyndns.org -
Suspicious use of SetThreadContext 1 IoCs
Processes:
Halkbank_Ekstre_20231127_093256_734631.pdf.exedescription pid process target process PID 1944 set thread context of 1288 1944 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Halkbank_Ekstre_20231127_093256_734631.pdf.exe -
Suspicious behavior: EnumeratesProcesses 3 IoCs
Processes:
Halkbank_Ekstre_20231127_093256_734631.pdf.exeHalkbank_Ekstre_20231127_093256_734631.pdf.exepid process 1944 Halkbank_Ekstre_20231127_093256_734631.pdf.exe 1288 Halkbank_Ekstre_20231127_093256_734631.pdf.exe 1288 Halkbank_Ekstre_20231127_093256_734631.pdf.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
Halkbank_Ekstre_20231127_093256_734631.pdf.exeHalkbank_Ekstre_20231127_093256_734631.pdf.exedescription pid process Token: SeDebugPrivilege 1944 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Token: SeDebugPrivilege 1288 Halkbank_Ekstre_20231127_093256_734631.pdf.exe -
Suspicious use of WriteProcessMemory 13 IoCs
Processes:
Halkbank_Ekstre_20231127_093256_734631.pdf.exedescription pid process target process PID 1944 wrote to memory of 2068 1944 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Halkbank_Ekstre_20231127_093256_734631.pdf.exe PID 1944 wrote to memory of 2068 1944 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Halkbank_Ekstre_20231127_093256_734631.pdf.exe PID 1944 wrote to memory of 2068 1944 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Halkbank_Ekstre_20231127_093256_734631.pdf.exe PID 1944 wrote to memory of 2068 1944 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Halkbank_Ekstre_20231127_093256_734631.pdf.exe PID 1944 wrote to memory of 1288 1944 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Halkbank_Ekstre_20231127_093256_734631.pdf.exe PID 1944 wrote to memory of 1288 1944 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Halkbank_Ekstre_20231127_093256_734631.pdf.exe PID 1944 wrote to memory of 1288 1944 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Halkbank_Ekstre_20231127_093256_734631.pdf.exe PID 1944 wrote to memory of 1288 1944 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Halkbank_Ekstre_20231127_093256_734631.pdf.exe PID 1944 wrote to memory of 1288 1944 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Halkbank_Ekstre_20231127_093256_734631.pdf.exe PID 1944 wrote to memory of 1288 1944 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Halkbank_Ekstre_20231127_093256_734631.pdf.exe PID 1944 wrote to memory of 1288 1944 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Halkbank_Ekstre_20231127_093256_734631.pdf.exe PID 1944 wrote to memory of 1288 1944 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Halkbank_Ekstre_20231127_093256_734631.pdf.exe PID 1944 wrote to memory of 1288 1944 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Halkbank_Ekstre_20231127_093256_734631.pdf.exe -
outlook_office_path 1 IoCs
Processes:
Halkbank_Ekstre_20231127_093256_734631.pdf.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-2952504676-3105837840-1406404655-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 Halkbank_Ekstre_20231127_093256_734631.pdf.exe -
outlook_win_path 1 IoCs
Processes:
Halkbank_Ekstre_20231127_093256_734631.pdf.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-2952504676-3105837840-1406404655-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 Halkbank_Ekstre_20231127_093256_734631.pdf.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_20231127_093256_734631.pdf.exe"C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_20231127_093256_734631.pdf.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1944 -
C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_20231127_093256_734631.pdf.exe"C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_20231127_093256_734631.pdf.exe"2⤵PID:2068
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C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_20231127_093256_734631.pdf.exe"C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_20231127_093256_734631.pdf.exe"2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:1288