oski | ead121e4d007085adb42edd61c3328aa728fa2c1d7c78e77ceb64f999f7323e3

General

Target

ead121e4d007085adb42edd61c3328aa728fa2c1d7c78e77ceb64f999f7323e3.exe
Size

4.0MB
MD5

128020874e41644b7431278a13dd2635
SHA1

85c877c77e10cf69ec44428e0398eb1e570426d0
SHA256

ead121e4d007085adb42edd61c3328aa728fa2c1d7c78e77ceb64f999f7323e3
SHA512

84055d76dcd1cf28bee65b5d9004e8b92bda0862e2447c7a4023a1abd488e0e1fbcf0d4c28a9a41b8a8b305a7a9adc8b4a6714fbc0a93c1dc58e56214e6737bc

Score

10^/10

oski evasion infostealer spyware stealer themida trojan vmprotect

Malware Config

Extracted

Family

oski

C2

ratinonanuere.pw

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

VMProtect packed file 6 IoCs

Detects executables packed with VMProtect commercial packer.

vmprotect

resource	yara_rule
behavioral1/memory/1980-55-0x0000000000D70000-0x00000000012FA000-memory.dmp	vmprotect
behavioral1/memory/1980-56-0x0000000000D70000-0x00000000012FA000-memory.dmp	vmprotect
behavioral1/memory/1980-57-0x0000000000D70000-0x00000000012FA000-memory.dmp	vmprotect
behavioral1/memory/1980-58-0x0000000000D70000-0x00000000012FA000-memory.dmp	vmprotect
behavioral1/memory/1980-59-0x0000000000D70000-0x00000000012FA000-memory.dmp	vmprotect
behavioral1/memory/1980-60-0x0000000000D70000-0x00000000012FA000-memory.dmp	vmprotect

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	ead121e4d007085adb42edd61c3328aa728fa2c1d7c78e77ceb64f999f7323e3.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	ead121e4d007085adb42edd61c3328aa728fa2c1d7c78e77ceb64f999f7323e3.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 6 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/memory/1980-55-0x0000000000D70000-0x00000000012FA000-memory.dmp	themida
behavioral1/memory/1980-56-0x0000000000D70000-0x00000000012FA000-memory.dmp	themida
behavioral1/memory/1980-57-0x0000000000D70000-0x00000000012FA000-memory.dmp	themida
behavioral1/memory/1980-58-0x0000000000D70000-0x00000000012FA000-memory.dmp	themida
behavioral1/memory/1980-59-0x0000000000D70000-0x00000000012FA000-memory.dmp	themida
behavioral1/memory/1980-60-0x0000000000D70000-0x00000000012FA000-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	ead121e4d007085adb42edd61c3328aa728fa2c1d7c78e77ceb64f999f7323e3.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
1980	ead121e4d007085adb42edd61c3328aa728fa2c1d7c78e77ceb64f999f7323e3.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
280	1980	WerFault.exe	26

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1980 wrote to memory of 280	1980	ead121e4d007085adb42edd61c3328aa728fa2c1d7c78e77ceb64f999f7323e3.exe	29
PID 1980 wrote to memory of 280	1980	ead121e4d007085adb42edd61c3328aa728fa2c1d7c78e77ceb64f999f7323e3.exe	29
PID 1980 wrote to memory of 280	1980	ead121e4d007085adb42edd61c3328aa728fa2c1d7c78e77ceb64f999f7323e3.exe	29
PID 1980 wrote to memory of 280	1980	ead121e4d007085adb42edd61c3328aa728fa2c1d7c78e77ceb64f999f7323e3.exe	29

C:\Users\Admin\AppData\Local\Temp\ead121e4d007085adb42edd61c3328aa728fa2c1d7c78e77ceb64f999f7323e3.exe
"C:\Users\Admin\AppData\Local\Temp\ead121e4d007085adb42edd61c3328aa728fa2c1d7c78e77ceb64f999f7323e3.exe"
1⤵
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of WriteProcessMemory
PID:1980
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 820
  2⤵
  - Program crash
  PID:280

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/1980-55-0x0000000000D70000-0x00000000012FA000-memory.dmp

Filesize
5.5MB

Download
memory/1980-56-0x0000000000D70000-0x00000000012FA000-memory.dmp

Filesize
5.5MB

Download
memory/1980-57-0x0000000000D70000-0x00000000012FA000-memory.dmp

Filesize
5.5MB

Download
memory/1980-58-0x0000000000D70000-0x00000000012FA000-memory.dmp

Filesize
5.5MB

Download
memory/1980-59-0x0000000000D70000-0x00000000012FA000-memory.dmp

Filesize
5.5MB

Download
memory/1980-60-0x0000000000D70000-0x00000000012FA000-memory.dmp

Filesize
5.5MB

Download
memory/1980-61-0x0000000077920000-0x0000000077AA0000-memory.dmp

Filesize
1.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads