oski | 244e34d80127109ce2223fbadd07131db88a17193c63aedbc2ce8f4ca5990129

General

Target

244e34d80127109ce2223fbadd07131db88a17193c63aedbc2ce8f4ca5990129.exe
Size

1.8MB
MD5

93a77aa3e940d09d24bed59430e93e77
SHA1

fdbb3b67c8c086895585bb45e05c7fbc865c78c0
SHA256

244e34d80127109ce2223fbadd07131db88a17193c63aedbc2ce8f4ca5990129
SHA512

bbdbb29a86f2eb24324220179b99845a941acaf923cefe713d1bee7a2b5bb6396a97621db337093b7595ddb8cbf9dd2d7fc504c44a0b0be6a3f8878f78dc28db

Score

10^/10

oski evasion infostealer spyware stealer trojan

Malware Config

Extracted

Family

oski

C2

188.127.227.22

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski
Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	244e34d80127109ce2223fbadd07131db88a17193c63aedbc2ce8f4ca5990129.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	244e34d80127109ce2223fbadd07131db88a17193c63aedbc2ce8f4ca5990129.exe

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

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	244e34d80127109ce2223fbadd07131db88a17193c63aedbc2ce8f4ca5990129.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
560	244e34d80127109ce2223fbadd07131db88a17193c63aedbc2ce8f4ca5990129.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
272	560	WerFault.exe	26

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 560 wrote to memory of 272	560	244e34d80127109ce2223fbadd07131db88a17193c63aedbc2ce8f4ca5990129.exe	30
PID 560 wrote to memory of 272	560	244e34d80127109ce2223fbadd07131db88a17193c63aedbc2ce8f4ca5990129.exe	30
PID 560 wrote to memory of 272	560	244e34d80127109ce2223fbadd07131db88a17193c63aedbc2ce8f4ca5990129.exe	30
PID 560 wrote to memory of 272	560	244e34d80127109ce2223fbadd07131db88a17193c63aedbc2ce8f4ca5990129.exe	30

C:\Users\Admin\AppData\Local\Temp\244e34d80127109ce2223fbadd07131db88a17193c63aedbc2ce8f4ca5990129.exe
"C:\Users\Admin\AppData\Local\Temp\244e34d80127109ce2223fbadd07131db88a17193c63aedbc2ce8f4ca5990129.exe"
1⤵
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of WriteProcessMemory
PID:560
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 560 -s 832
  2⤵
  - Program crash
  PID:272

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

1

T1497

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Virtualization/Sandbox Evasion

1

T1497

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/560-54-0x0000000075271000-0x0000000075273000-memory.dmp

Filesize
8KB

Download
memory/560-55-0x0000000000400000-0x0000000000C6D000-memory.dmp

Filesize
8.4MB

Download
memory/560-56-0x0000000000400000-0x0000000000C6D000-memory.dmp

Filesize
8.4MB

Download
memory/560-57-0x0000000077350000-0x00000000774D0000-memory.dmp

Filesize
1.5MB

Download
memory/560-58-0x0000000000400000-0x0000000000C6D000-memory.dmp

Filesize
8.4MB

Download
memory/560-59-0x0000000000400000-0x0000000000C6D000-memory.dmp

Filesize
8.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads