oski | 08167401255c540fed1d03109911cc841a05324958233cee0a798a0b13fdc877

General

Target

08167401255c540fed1d03109911cc841a05324958233cee0a798a0b13fdc877.exe
Size

2.1MB
MD5

9fa5bfb2a6fa702ef279ff02924a2282
SHA1

f9f79b47d6dca30b6ed0cc94636b299923e10eda
SHA256

08167401255c540fed1d03109911cc841a05324958233cee0a798a0b13fdc877
SHA512

d796083383e4bddaf7946fb6a8dceeef515e08bb84580138a962a4190facae39f79bd0564f8f9c21674e694105cdcdbc2af79371db2bc8ed2cd43273f7f0af6c

Score

10^/10

oski evasion infostealer spyware stealer themida trojan

Malware Config

Extracted

Family

oski

C2

hostisgerhg.tk

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	08167401255c540fed1d03109911cc841a05324958233cee0a798a0b13fdc877.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	08167401255c540fed1d03109911cc841a05324958233cee0a798a0b13fdc877.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

Themida packer 9 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/memory/1980-55-0x0000000001200000-0x0000000001830000-memory.dmp	themida
behavioral1/memory/1980-56-0x0000000001200000-0x0000000001830000-memory.dmp	themida
behavioral1/memory/1980-57-0x0000000001200000-0x0000000001830000-memory.dmp	themida
behavioral1/memory/1980-58-0x0000000001200000-0x0000000001830000-memory.dmp	themida
behavioral1/memory/1980-59-0x0000000001200000-0x0000000001830000-memory.dmp	themida
behavioral1/memory/1980-60-0x0000000001200000-0x0000000001830000-memory.dmp	themida
behavioral1/memory/1980-61-0x0000000001200000-0x0000000001830000-memory.dmp	themida
behavioral1/memory/1980-62-0x0000000001200000-0x0000000001830000-memory.dmp	themida
behavioral1/memory/1980-63-0x0000000001200000-0x0000000001830000-memory.dmp	themida

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	08167401255c540fed1d03109911cc841a05324958233cee0a798a0b13fdc877.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
432	1980	WerFault.exe	26

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1980 wrote to memory of 432	1980	08167401255c540fed1d03109911cc841a05324958233cee0a798a0b13fdc877.exe	30
PID 1980 wrote to memory of 432	1980	08167401255c540fed1d03109911cc841a05324958233cee0a798a0b13fdc877.exe	30
PID 1980 wrote to memory of 432	1980	08167401255c540fed1d03109911cc841a05324958233cee0a798a0b13fdc877.exe	30
PID 1980 wrote to memory of 432	1980	08167401255c540fed1d03109911cc841a05324958233cee0a798a0b13fdc877.exe	30

C:\Users\Admin\AppData\Local\Temp\08167401255c540fed1d03109911cc841a05324958233cee0a798a0b13fdc877.exe
"C:\Users\Admin\AppData\Local\Temp\08167401255c540fed1d03109911cc841a05324958233cee0a798a0b13fdc877.exe"
1⤵
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of WriteProcessMemory
PID:1980
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 764
  2⤵
  - Program crash
  PID:432

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/1980-54-0x00000000768D1000-0x00000000768D3000-memory.dmp

Filesize
8KB

Download
memory/1980-55-0x0000000001200000-0x0000000001830000-memory.dmp

Filesize
6.2MB

Download
memory/1980-56-0x0000000001200000-0x0000000001830000-memory.dmp

Filesize
6.2MB

Download
memory/1980-57-0x0000000001200000-0x0000000001830000-memory.dmp

Filesize
6.2MB

Download
memory/1980-58-0x0000000001200000-0x0000000001830000-memory.dmp

Filesize
6.2MB

Download
memory/1980-59-0x0000000001200000-0x0000000001830000-memory.dmp

Filesize
6.2MB

Download
memory/1980-60-0x0000000001200000-0x0000000001830000-memory.dmp

Filesize
6.2MB

Download
memory/1980-61-0x0000000001200000-0x0000000001830000-memory.dmp

Filesize
6.2MB

Download
memory/1980-62-0x0000000001200000-0x0000000001830000-memory.dmp

Filesize
6.2MB

Download
memory/1980-63-0x0000000001200000-0x0000000001830000-memory.dmp

Filesize
6.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads