oski | 7ca12ad826ec9ff894b0e854f364a669433badbc130a155667e08d14572498a9

General

Target

7ca12ad826ec9ff894b0e854f364a669433badbc130a155667e08d14572498a9.exe
Size

4.0MB
MD5

65427e7187928692149566d3e5f827c7
SHA1

8840fdda0b074711aa60292d15f9f124604bb009
SHA256

7ca12ad826ec9ff894b0e854f364a669433badbc130a155667e08d14572498a9
SHA512

1e3b92ad2fbb32101bc1a445539a2bcc0aa3d64bc2dcbb2762e2e50da24d190de1b159bf4488235e3a42c3b9e90782eeef53f5d20c4f09e3fce6d79b1728f886

Score

10^/10

oski evasion infostealer spyware stealer themida trojan

Malware Config

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	7ca12ad826ec9ff894b0e854f364a669433badbc130a155667e08d14572498a9.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	7ca12ad826ec9ff894b0e854f364a669433badbc130a155667e08d14572498a9.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 1 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/memory/1304-55-0x00000000010B0000-0x0000000001623000-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	7ca12ad826ec9ff894b0e854f364a669433badbc130a155667e08d14572498a9.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
1304	7ca12ad826ec9ff894b0e854f364a669433badbc130a155667e08d14572498a9.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
948	1304	WerFault.exe	16

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1304 wrote to memory of 948	1304	7ca12ad826ec9ff894b0e854f364a669433badbc130a155667e08d14572498a9.exe	30
PID 1304 wrote to memory of 948	1304	7ca12ad826ec9ff894b0e854f364a669433badbc130a155667e08d14572498a9.exe	30
PID 1304 wrote to memory of 948	1304	7ca12ad826ec9ff894b0e854f364a669433badbc130a155667e08d14572498a9.exe	30
PID 1304 wrote to memory of 948	1304	7ca12ad826ec9ff894b0e854f364a669433badbc130a155667e08d14572498a9.exe	30

C:\Users\Admin\AppData\Local\Temp\7ca12ad826ec9ff894b0e854f364a669433badbc130a155667e08d14572498a9.exe
"C:\Users\Admin\AppData\Local\Temp\7ca12ad826ec9ff894b0e854f364a669433badbc130a155667e08d14572498a9.exe"
1⤵
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of WriteProcessMemory
PID:1304
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1304 -s 856
  2⤵
  - Program crash
  PID:948

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/1304-54-0x00000000753B1000-0x00000000753B3000-memory.dmp

Filesize
8KB

Download
memory/1304-55-0x00000000010B0000-0x0000000001623000-memory.dmp

Filesize
5.4MB

Download
memory/1304-56-0x00000000010B0000-0x0000000001623000-memory.dmp

Filesize
5.4MB

Download
memory/1304-57-0x00000000010B0000-0x0000000001623000-memory.dmp

Filesize
5.4MB

Download
memory/1304-58-0x00000000010B0000-0x0000000001623000-memory.dmp

Filesize
5.4MB

Download
memory/1304-60-0x00000000010B0000-0x0000000001623000-memory.dmp

Filesize
5.4MB

Download
memory/1304-59-0x00000000010B0000-0x0000000001623000-memory.dmp

Filesize
5.4MB

Download
memory/1304-61-0x0000000077700000-0x0000000077880000-memory.dmp

Filesize
1.5MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads