oski | 3163e680a9b1c5c3b4e64b0fe808b79c5090a69bb3a359fbe18bbf9064dc4517

General

Target

46ddcd557521e886e2548e72097e01d6.exe
Size

262KB
MD5

46ddcd557521e886e2548e72097e01d6
SHA1

fd4f34bc1ee6df6d2d04860b2b39349ee6221bf7
SHA256

3163e680a9b1c5c3b4e64b0fe808b79c5090a69bb3a359fbe18bbf9064dc4517
SHA512

79abb9091c52d225c57db429727b164f5f8ee1de03a597592c42f57f32281a26bc4d400fc670553b8e34697575558616e971fbf81d5901a8007315452ba84071

Score

10^/10

oski discovery infostealer persistence spyware stealer

Malware Config

Extracted

Family

oski

C2

orisinlog.com

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

2040 cmd.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
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081

pid	process
2040	cmd.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

46ddcd557521e886e2548e72097e01d6.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\Run\note = "\"C:\\Users\\Admin\\AppData\\Local\\note.exe\""	46ddcd557521e886e2548e72097e01d6.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Suspicious use of SetThreadContext 1 IoCs

Processes:

46ddcd557521e886e2548e72097e01d6.exe

description pid process target process

PID 788 set thread context of 292 788 46ddcd557521e886e2548e72097e01d6.exe 46ddcd557521e886e2548e72097e01d6.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	pid	process	target process
PID 788 set thread context of 292	788	46ddcd557521e886e2548e72097e01d6.exe	46ddcd557521e886e2548e72097e01d6.exe

Checks processor information in registry 2 TTPs 1 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

46ddcd557521e886e2548e72097e01d6.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	46ddcd557521e886e2548e72097e01d6.exe

Kills process with taskkill 1 IoCs
evasion

Processes:

taskkill.exe

pid process

1668 taskkill.exe

pid	process
1668	taskkill.exe

NTFS ADS 11 IoCs

Processes:

46ddcd557521e886e2548e72097e01d6.exe

description	ioc	process
File created	C:\ProgramData\245904002570633\_ cursor: pointer.zip	46ddcd557521e886e2548e72097e01d6.exe
File created	C:\ProgramData\245904002570633\_ -webkit-text-size-adjust: 100.zip	46ddcd557521e886e2548e72097e01d6.exe
File created	C:\ProgramData\245904002570633\_ border-radius: 8px.zip	46ddcd557521e886e2548e72097e01d6.exe
File created	C:\ProgramData\245904002570633\_ text-align: left.zip	46ddcd557521e886e2548e72097e01d6.exe
File created	C:\ProgramData\245904002570633\_ hyphens: auto.zip	46ddcd557521e886e2548e72097e01d6.exe
File created	C:\ProgramData\245904002570633\_ font-size: 14px.zip	46ddcd557521e886e2548e72097e01d6.exe
File created	C:\ProgramData\245904002570633\_ margin: 14px auto.zip	46ddcd557521e886e2548e72097e01d6.exe
File created	C:\ProgramData\245904002570633\_ background-color: #1a73e8.zip	46ddcd557521e886e2548e72097e01d6.exe
File created	C:\ProgramData\245904002570633\_<!DOCTYPE html><html lang="ru" dir="ltr"><head><style nonce="zviW6e1L6gi48WSk\+5DkQ"> a, a:link, a:visited, a:active, a:hover { color: #1a73e8.zip	46ddcd557521e886e2548e72097e01d6.exe
File created	C:\ProgramData\245904002570633\_ text-align: center.zip	46ddcd557521e886e2548e72097e01d6.exe
File created	C:\ProgramData\245904002570633\_ padding: 24px.zip	46ddcd557521e886e2548e72097e01d6.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

46ddcd557521e886e2548e72097e01d6.exe

pid	process
788	46ddcd557521e886e2548e72097e01d6.exe
788	46ddcd557521e886e2548e72097e01d6.exe
788	46ddcd557521e886e2548e72097e01d6.exe
788	46ddcd557521e886e2548e72097e01d6.exe
788	46ddcd557521e886e2548e72097e01d6.exe
788	46ddcd557521e886e2548e72097e01d6.exe
788	46ddcd557521e886e2548e72097e01d6.exe
788	46ddcd557521e886e2548e72097e01d6.exe
788	46ddcd557521e886e2548e72097e01d6.exe
788	46ddcd557521e886e2548e72097e01d6.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

46ddcd557521e886e2548e72097e01d6.exetaskkill.exe

description pid process

Token: SeDebugPrivilege 788 46ddcd557521e886e2548e72097e01d6.exe
Token: SeDebugPrivilege 1668 taskkill.exe

description	pid	process
Token: SeDebugPrivilege	788	46ddcd557521e886e2548e72097e01d6.exe
Token: SeDebugPrivilege	1668	taskkill.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

46ddcd557521e886e2548e72097e01d6.exe46ddcd557521e886e2548e72097e01d6.execmd.exe

C:\Users\Admin\AppData\Local\Temp\46ddcd557521e886e2548e72097e01d6.exe
"C:\Users\Admin\AppData\Local\Temp\46ddcd557521e886e2548e72097e01d6.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:788

C:\Users\Admin\AppData\Local\Temp\46ddcd557521e886e2548e72097e01d6.exe
C:\Users\Admin\AppData\Local\Temp\46ddcd557521e886e2548e72097e01d6.exe
2⤵
PID:1504

C:\Users\Admin\AppData\Local\Temp\46ddcd557521e886e2548e72097e01d6.exe
C:\Users\Admin\AppData\Local\Temp\46ddcd557521e886e2548e72097e01d6.exe
2⤵
PID:556

C:\Users\Admin\AppData\Local\Temp\46ddcd557521e886e2548e72097e01d6.exe
C:\Users\Admin\AppData\Local\Temp\46ddcd557521e886e2548e72097e01d6.exe
2⤵
- Checks processor information in registry
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:292

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c taskkill /pid 292 & erase C:\Users\Admin\AppData\Local\Temp\46ddcd557521e886e2548e72097e01d6.exe & RD /S /Q C:\\ProgramData\\245904002570633\\* & exit
3⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
PID:2040

C:\Windows\SysWOW64\taskkill.exe
taskkill /pid 292
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1668

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

2

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/292-65-0x000000000040717B-mapping.dmp

Download
memory/292-64-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/292-66-0x0000000075551000-0x0000000075553000-memory.dmp

Filesize
8KB

Download
memory/292-67-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/788-59-0x0000000000310000-0x0000000000311000-memory.dmp

Filesize
4KB

Download
memory/788-61-0x00000000002F0000-0x00000000002F2000-memory.dmp

Filesize
8KB

Download
memory/788-62-0x0000000004990000-0x0000000004991000-memory.dmp

Filesize
4KB

Download
memory/788-63-0x0000000004140000-0x000000000417E000-memory.dmp

Filesize
248KB

Download
memory/1668-69-0x0000000000000000-mapping.dmp

Download
memory/2040-68-0x0000000000000000-mapping.dmp

Download

description	pid	process	target process
PID 788 wrote to memory of 1504	788	46ddcd557521e886e2548e72097e01d6.exe	46ddcd557521e886e2548e72097e01d6.exe
PID 788 wrote to memory of 1504	788	46ddcd557521e886e2548e72097e01d6.exe	46ddcd557521e886e2548e72097e01d6.exe
PID 788 wrote to memory of 1504	788	46ddcd557521e886e2548e72097e01d6.exe	46ddcd557521e886e2548e72097e01d6.exe
PID 788 wrote to memory of 1504	788	46ddcd557521e886e2548e72097e01d6.exe	46ddcd557521e886e2548e72097e01d6.exe
PID 788 wrote to memory of 556	788	46ddcd557521e886e2548e72097e01d6.exe	46ddcd557521e886e2548e72097e01d6.exe
PID 788 wrote to memory of 556	788	46ddcd557521e886e2548e72097e01d6.exe	46ddcd557521e886e2548e72097e01d6.exe
PID 788 wrote to memory of 556	788	46ddcd557521e886e2548e72097e01d6.exe	46ddcd557521e886e2548e72097e01d6.exe
PID 788 wrote to memory of 556	788	46ddcd557521e886e2548e72097e01d6.exe	46ddcd557521e886e2548e72097e01d6.exe
PID 788 wrote to memory of 292	788	46ddcd557521e886e2548e72097e01d6.exe	46ddcd557521e886e2548e72097e01d6.exe
PID 788 wrote to memory of 292	788	46ddcd557521e886e2548e72097e01d6.exe	46ddcd557521e886e2548e72097e01d6.exe
PID 788 wrote to memory of 292	788	46ddcd557521e886e2548e72097e01d6.exe	46ddcd557521e886e2548e72097e01d6.exe
PID 788 wrote to memory of 292	788	46ddcd557521e886e2548e72097e01d6.exe	46ddcd557521e886e2548e72097e01d6.exe
PID 788 wrote to memory of 292	788	46ddcd557521e886e2548e72097e01d6.exe	46ddcd557521e886e2548e72097e01d6.exe
PID 788 wrote to memory of 292	788	46ddcd557521e886e2548e72097e01d6.exe	46ddcd557521e886e2548e72097e01d6.exe
PID 788 wrote to memory of 292	788	46ddcd557521e886e2548e72097e01d6.exe	46ddcd557521e886e2548e72097e01d6.exe
PID 788 wrote to memory of 292	788	46ddcd557521e886e2548e72097e01d6.exe	46ddcd557521e886e2548e72097e01d6.exe
PID 788 wrote to memory of 292	788	46ddcd557521e886e2548e72097e01d6.exe	46ddcd557521e886e2548e72097e01d6.exe
PID 788 wrote to memory of 292	788	46ddcd557521e886e2548e72097e01d6.exe	46ddcd557521e886e2548e72097e01d6.exe
PID 292 wrote to memory of 2040	292	46ddcd557521e886e2548e72097e01d6.exe	cmd.exe
PID 292 wrote to memory of 2040	292	46ddcd557521e886e2548e72097e01d6.exe	cmd.exe
PID 292 wrote to memory of 2040	292	46ddcd557521e886e2548e72097e01d6.exe	cmd.exe
PID 292 wrote to memory of 2040	292	46ddcd557521e886e2548e72097e01d6.exe	cmd.exe
PID 2040 wrote to memory of 1668	2040	cmd.exe	taskkill.exe
PID 2040 wrote to memory of 1668	2040	cmd.exe	taskkill.exe
PID 2040 wrote to memory of 1668	2040	cmd.exe	taskkill.exe
PID 2040 wrote to memory of 1668	2040	cmd.exe	taskkill.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads