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
behavioral2/memory/3860-130-0x00000000002E0000-0x00000000003E6000-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 3860 set thread context of 368	3860	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	87

Program crash 1 IoCs

pid	pid_target	Process	procid_target
5000	368	WerFault.exe	87

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	3860	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3860 wrote to memory of 368	3860	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	87
PID 3860 wrote to memory of 368	3860	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	87
PID 3860 wrote to memory of 368	3860	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	87
PID 3860 wrote to memory of 368	3860	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	87
PID 3860 wrote to memory of 368	3860	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	87
PID 3860 wrote to memory of 368	3860	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	87
PID 3860 wrote to memory of 368	3860	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	87
PID 3860 wrote to memory of 368	3860	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	87
PID 3860 wrote to memory of 368	3860	74fed62553501ee21a1ec9bfd2e0d3785dec401249c9da3154fbe6b10c713038.exe	87

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:3860
- 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
  PID:368
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 368 -s 1416
    3⤵
    - Program crash
    PID:5000

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 368 -ip 368
1⤵
PID:316

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/368-136-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/368-137-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/368-138-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/368-140-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/3860-130-0x00000000002E0000-0x00000000003E6000-memory.dmp

Filesize
1.0MB

Download
memory/3860-131-0x0000000004D40000-0x0000000004DD2000-memory.dmp

Filesize
584KB

Download
memory/3860-132-0x0000000005390000-0x0000000005934000-memory.dmp

Filesize
5.6MB

Download
memory/3860-133-0x0000000004DE0000-0x0000000004E24000-memory.dmp

Filesize
272KB

Download
memory/3860-134-0x0000000005AF0000-0x0000000005B56000-memory.dmp

Filesize
408KB

Download

Analysis

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