oski | 74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038

General

Target

74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe
Size

1.2MB
MD5

0040b750f231f0eeb175a48aebab5b48
SHA1

b5446600d2df181c644f9ab582f6d99440727616
SHA256

74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038
SHA512

58504c6b4be1c801a68d7d0339254bdf9e49a2ca8865ab7cfb9e7791fe1cf0447ed52ca395b2b160d31f7ab8ea5baff10e60a33dcce708d65b3e896bdd0f5532

Score

10^/10

oski infostealer spyware stealer vmprotect

Malware Config

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski

VMProtect packed file 1 IoCs

Detects executables packed with VMProtect commercial packer.

vmprotect

resource	yara_rule
behavioral1/memory/1620-54-0x0000000001070000-0x0000000001176000-memory.dmp	vmprotect

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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1620 set thread context of 1356	1620	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	26

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1320	1356	WerFault.exe	26

Checks processor information in registry 2 TTPs 2 IoCs

Processor 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\CentralProcessor\0\ProcessorNameString	RegAsm.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1620	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1620 wrote to memory of 1356	1620	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	26
PID 1620 wrote to memory of 1356	1620	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	26
PID 1620 wrote to memory of 1356	1620	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	26
PID 1620 wrote to memory of 1356	1620	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	26
PID 1620 wrote to memory of 1356	1620	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	26
PID 1620 wrote to memory of 1356	1620	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	26
PID 1620 wrote to memory of 1356	1620	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	26
PID 1620 wrote to memory of 1356	1620	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	26
PID 1620 wrote to memory of 1356	1620	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	26
PID 1620 wrote to memory of 1356	1620	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	26
PID 1620 wrote to memory of 1356	1620	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	26
PID 1620 wrote to memory of 1356	1620	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	26
PID 1620 wrote to memory of 1356	1620	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	26
PID 1356 wrote to memory of 1320	1356	RegAsm.exe	29
PID 1356 wrote to memory of 1320	1356	RegAsm.exe	29
PID 1356 wrote to memory of 1320	1356	RegAsm.exe	29
PID 1356 wrote to memory of 1320	1356	RegAsm.exe	29

C:\Users\Admin\AppData\Local\Temp\74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe
"C:\Users\Admin\AppData\Local\Temp\74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1620
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Checks processor information in registry
  - Suspicious use of WriteProcessMemory
  PID:1356
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1356 -s 900
    3⤵
    - Program crash
    PID:1320

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1356-56-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/1356-59-0x0000000075951000-0x0000000075953000-memory.dmp

Filesize
8KB

Download
memory/1356-60-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/1356-62-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/1620-54-0x0000000001070000-0x0000000001176000-memory.dmp

Filesize
1.0MB

Download
memory/1620-55-0x00000000003E0000-0x00000000003F8000-memory.dmp

Filesize
96KB

Download

Analysis

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