Analysis
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max time kernel
135s -
max time network
156s -
platform
windows10-2004_x64 -
resource
win10v2004-20231127-en -
resource tags
arch:x64arch:x86image:win10v2004-20231127-enlocale:en-usos:windows10-2004-x64system -
submitted
30-11-2023 06:54
Static task
static1
Behavioral task
behavioral1
Sample
Halkbank_Ekstre_20231129_532423_6373443.pdf.exe
Resource
win7-20231020-en
Behavioral task
behavioral2
Sample
Halkbank_Ekstre_20231129_532423_6373443.pdf.exe
Resource
win10v2004-20231127-en
General
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Target
Halkbank_Ekstre_20231129_532423_6373443.pdf.exe
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Size
577KB
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MD5
262b52d9590ed5c1810aea72743a52b9
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SHA1
1dd3ccec496afccc5da4d2d9614149d56606f050
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SHA256
283a23b5137c06811fc59411e30f85f91c7728528cbdad2afeb93cba0f65b598
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SHA512
9456a271a35a491c0eefeea4b996908f2df71818198ae31fa2719b2e77e951948a11bbde612d96639b1aa3ebbc10fe2f048e0f9c4d4d7ad0e3a19ae75b3c5cc2
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SSDEEP
12288:5ucopox4F9DmF2+R3NXfyKT/T0ysS07jTImEwScLzA:DeZ4hVJ190vTImEDCzA
Malware Config
Signatures
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Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
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Snake Keylogger payload 2 IoCs
Processes:
resource yara_rule behavioral2/memory/1040-11-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral2/memory/1040-16-0x00000000057C0000-0x00000000057D0000-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_20231129_532423_6373443.pdf.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-3635043082-2972811465-3176142135-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 Halkbank_Ekstre_20231129_532423_6373443.pdf.exe Key opened \REGISTRY\USER\S-1-5-21-3635043082-2972811465-3176142135-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 Halkbank_Ekstre_20231129_532423_6373443.pdf.exe Key opened \REGISTRY\USER\S-1-5-21-3635043082-2972811465-3176142135-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 Halkbank_Ekstre_20231129_532423_6373443.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 46 checkip.dyndns.org -
Suspicious use of SetThreadContext 1 IoCs
Processes:
Halkbank_Ekstre_20231129_532423_6373443.pdf.exedescription pid process target process PID 4212 set thread context of 1040 4212 Halkbank_Ekstre_20231129_532423_6373443.pdf.exe Halkbank_Ekstre_20231129_532423_6373443.pdf.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
Halkbank_Ekstre_20231129_532423_6373443.pdf.exepid process 1040 Halkbank_Ekstre_20231129_532423_6373443.pdf.exe 1040 Halkbank_Ekstre_20231129_532423_6373443.pdf.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
Halkbank_Ekstre_20231129_532423_6373443.pdf.exedescription pid process Token: SeDebugPrivilege 1040 Halkbank_Ekstre_20231129_532423_6373443.pdf.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
Halkbank_Ekstre_20231129_532423_6373443.pdf.exedescription pid process target process PID 4212 wrote to memory of 1040 4212 Halkbank_Ekstre_20231129_532423_6373443.pdf.exe Halkbank_Ekstre_20231129_532423_6373443.pdf.exe PID 4212 wrote to memory of 1040 4212 Halkbank_Ekstre_20231129_532423_6373443.pdf.exe Halkbank_Ekstre_20231129_532423_6373443.pdf.exe PID 4212 wrote to memory of 1040 4212 Halkbank_Ekstre_20231129_532423_6373443.pdf.exe Halkbank_Ekstre_20231129_532423_6373443.pdf.exe PID 4212 wrote to memory of 1040 4212 Halkbank_Ekstre_20231129_532423_6373443.pdf.exe Halkbank_Ekstre_20231129_532423_6373443.pdf.exe PID 4212 wrote to memory of 1040 4212 Halkbank_Ekstre_20231129_532423_6373443.pdf.exe Halkbank_Ekstre_20231129_532423_6373443.pdf.exe PID 4212 wrote to memory of 1040 4212 Halkbank_Ekstre_20231129_532423_6373443.pdf.exe Halkbank_Ekstre_20231129_532423_6373443.pdf.exe PID 4212 wrote to memory of 1040 4212 Halkbank_Ekstre_20231129_532423_6373443.pdf.exe Halkbank_Ekstre_20231129_532423_6373443.pdf.exe PID 4212 wrote to memory of 1040 4212 Halkbank_Ekstre_20231129_532423_6373443.pdf.exe Halkbank_Ekstre_20231129_532423_6373443.pdf.exe -
outlook_office_path 1 IoCs
Processes:
Halkbank_Ekstre_20231129_532423_6373443.pdf.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-3635043082-2972811465-3176142135-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 Halkbank_Ekstre_20231129_532423_6373443.pdf.exe -
outlook_win_path 1 IoCs
Processes:
Halkbank_Ekstre_20231129_532423_6373443.pdf.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-3635043082-2972811465-3176142135-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 Halkbank_Ekstre_20231129_532423_6373443.pdf.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_20231129_532423_6373443.pdf.exe"C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_20231129_532423_6373443.pdf.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4212 -
C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_20231129_532423_6373443.pdf.exe"C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_20231129_532423_6373443.pdf.exe"2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:1040
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Halkbank_Ekstre_20231129_532423_6373443.pdf.exe.log
Filesize1KB
MD58ec831f3e3a3f77e4a7b9cd32b48384c
SHA1d83f09fd87c5bd86e045873c231c14836e76a05c
SHA2567667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982
SHA51226bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3