b969c39c4378266f7e9ebdd2287ee8c32cb9bba7f6514db54bf2babca30403e8

Analysis

max time kernel
243s
max time network
246s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
23-11-2022 07:10

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General

Target

Halkbank,pdf.exe
Size

6KB
MD5

8d936312a59afa52e18a4d665755690d
SHA1

aa34c27cdf073eb5c54e371714d3d68a626bbbd8
SHA256

ee511bade3822feb689576b65cb3e490e9459c11c5b6583b36920f742c1bd99d
SHA512

b36924fe5af405e6447fbf01d6d9c75cfe9dc335e36b64ea8982e59a1d9ac48dde4855f5c84cdcc21fb4d4dcbbfca1e485bbd32f04b10d67c1dc577aab9abd65
SSDEEP

96:awqkGAzKfGe7DVys+BWfik85EOd/vSGQeMFnU:N4DUDEPYEOdES

Score

7^/10

Malware Config

Signatures

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Halkbank,pdf.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	Halkbank,pdf.exe

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

Processes:

powershell.exe

pid process

4396 powershell.exe
4396 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Halkbank,pdf.exepowershell.exe

description pid process

Token: SeDebugPrivilege 5100 Halkbank,pdf.exe
Token: SeDebugPrivilege 4396 powershell.exe

pid	process
4396	powershell.exe
4396	powershell.exe

description	pid	process
Token: SeDebugPrivilege	5100	Halkbank,pdf.exe
Token: SeDebugPrivilege	4396	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

Halkbank,pdf.exe

description	pid	process	target process
PID 5100 wrote to memory of 4396	5100	Halkbank,pdf.exe	powershell.exe
PID 5100 wrote to memory of 4396	5100	Halkbank,pdf.exe	powershell.exe
PID 5100 wrote to memory of 4396	5100	Halkbank,pdf.exe	powershell.exe

C:\Users\Admin\AppData\Local\Temp\Halkbank,pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Halkbank,pdf.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5100

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAANQA3AA==
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4396

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/4396-136-0x0000000000000000-mapping.dmp

Download
memory/4396-137-0x0000000002590000-0x00000000025C6000-memory.dmp

Filesize
216KB

Download
memory/4396-138-0x0000000004CC0000-0x00000000052E8000-memory.dmp

Filesize
6.2MB

Download
memory/4396-139-0x0000000005390000-0x00000000053F6000-memory.dmp

Filesize
408KB

Download
memory/4396-140-0x00000000054B0000-0x0000000005516000-memory.dmp

Filesize
408KB

Download
memory/4396-141-0x00000000059E0000-0x00000000059FE000-memory.dmp

Filesize
120KB

Download
memory/5100-132-0x0000000000630000-0x0000000000638000-memory.dmp

Filesize
32KB

Download
memory/5100-133-0x0000000005CE0000-0x0000000005D72000-memory.dmp

Filesize
584KB

Download
memory/5100-134-0x0000000006330000-0x00000000068D4000-memory.dmp

Filesize
5.6MB

Download
memory/5100-135-0x0000000005DB0000-0x0000000005DD2000-memory.dmp

Filesize
136KB

Download