Analysis
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max time kernel
118s -
max time network
138s -
platform
windows7_x64 -
resource
win7-20231023-en -
resource tags
arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system -
submitted
27-11-2023 10:30
Static task
static1
Behavioral task
behavioral1
Sample
Halkbank_Ekstre_20231127_093256_734631.pdf.exe
Resource
win7-20231023-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
719KB
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MD5
1fd9b5970fe58960b6e8281f85bf3442
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SHA1
55fcb090bf4e9df3d09d0ac32389aa66ffddb971
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SHA256
1252485e3acb973a1f93ec7881af10d0c8429c540f3a603df73d446b8dc5f19d
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SHA512
2ebb280c5a353ff9c9984d0f7232910359c01813add76f19e586e7fb1427a1488c07786bdd1824c0ed1fdae44a90080ae0e7e3720a6672eb677bf592e44eed21
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SSDEEP
12288:8ti1KYlsZbjzAliCK44/ZxEdQv+DZbOgZByxt0IQOuaFv2GI195d7BR6wTtE6jD6:8M4bjsACK/ZxOVOgzyxtfQ5aAGYfpBhJ
Malware Config
Signatures
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Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
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Snake Keylogger payload 5 IoCs
Processes:
resource yara_rule behavioral1/memory/2924-9-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/2924-11-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/2924-15-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/2924-17-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/2924-19-0x0000000000400000-0x0000000000426000-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-1-5-21-2085049433-1067986815-1244098655-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Key opened \REGISTRY\USER\S-1-5-21-2085049433-1067986815-1244098655-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Key opened \REGISTRY\USER\S-1-5-21-2085049433-1067986815-1244098655-1000\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 2096 set thread context of 2924 2096 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Halkbank_Ekstre_20231127_093256_734631.pdf.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
Halkbank_Ekstre_20231127_093256_734631.pdf.exepid process 2924 Halkbank_Ekstre_20231127_093256_734631.pdf.exe 2924 Halkbank_Ekstre_20231127_093256_734631.pdf.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
Halkbank_Ekstre_20231127_093256_734631.pdf.exedescription pid process Token: SeDebugPrivilege 2924 Halkbank_Ekstre_20231127_093256_734631.pdf.exe -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
Halkbank_Ekstre_20231127_093256_734631.pdf.exedescription pid process target process PID 2096 wrote to memory of 2924 2096 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Halkbank_Ekstre_20231127_093256_734631.pdf.exe PID 2096 wrote to memory of 2924 2096 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Halkbank_Ekstre_20231127_093256_734631.pdf.exe PID 2096 wrote to memory of 2924 2096 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Halkbank_Ekstre_20231127_093256_734631.pdf.exe PID 2096 wrote to memory of 2924 2096 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Halkbank_Ekstre_20231127_093256_734631.pdf.exe PID 2096 wrote to memory of 2924 2096 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Halkbank_Ekstre_20231127_093256_734631.pdf.exe PID 2096 wrote to memory of 2924 2096 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Halkbank_Ekstre_20231127_093256_734631.pdf.exe PID 2096 wrote to memory of 2924 2096 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Halkbank_Ekstre_20231127_093256_734631.pdf.exe PID 2096 wrote to memory of 2924 2096 Halkbank_Ekstre_20231127_093256_734631.pdf.exe Halkbank_Ekstre_20231127_093256_734631.pdf.exe PID 2096 wrote to memory of 2924 2096 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-1-5-21-2085049433-1067986815-1244098655-1000\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-1-5-21-2085049433-1067986815-1244098655-1000\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 use of WriteProcessMemory
PID:2096 -
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:2924