oski | f0eed88ca8a09b3db7ec725d586945de6e47afeec6cb2f0b0e78a5c4396e8cad

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
22-12-2023 15:31

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General

Target

d9fa5b18b345033d9b02b1de41ab03c9.ps1
Size

421KB
MD5

d9fa5b18b345033d9b02b1de41ab03c9
SHA1

61087f756cf0392af40bb51b71f9581a40269d1c
SHA256

f0eed88ca8a09b3db7ec725d586945de6e47afeec6cb2f0b0e78a5c4396e8cad
SHA512

a489df8590d7eae0b4393c98974f2c30c5d348923e15a7ac48bea57f4cbc2f3079118195d61f6bd797e91d516f28305f97bfbef078217f154e534ab6ee0fd0e3
SSDEEP

12288:+Zjw0RJ9u5ILYDxD3fxYehza/tw64rL68:q3k

Score

10^/10

oski infostealer

Malware Config

Extracted

Family

oski

/103.114.107.28/l29/

Signatures

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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2904 set thread context of 2708	2904	powershell.exe	31

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2740	2708	WerFault.exe	31

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2904	powershell.exe
2904	powershell.exe
2904	powershell.exe
2904	powershell.exe
2904	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2904	powershell.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 2904 wrote to memory of 1412	2904	powershell.exe	29
PID 2904 wrote to memory of 1412	2904	powershell.exe	29
PID 2904 wrote to memory of 1412	2904	powershell.exe	29
PID 2904 wrote to memory of 1412	2904	powershell.exe	29
PID 2904 wrote to memory of 2968	2904	powershell.exe	30
PID 2904 wrote to memory of 2968	2904	powershell.exe	30
PID 2904 wrote to memory of 2968	2904	powershell.exe	30
PID 2904 wrote to memory of 2968	2904	powershell.exe	30
PID 2904 wrote to memory of 2708	2904	powershell.exe	31
PID 2904 wrote to memory of 2708	2904	powershell.exe	31
PID 2904 wrote to memory of 2708	2904	powershell.exe	31
PID 2904 wrote to memory of 2708	2904	powershell.exe	31
PID 2904 wrote to memory of 2708	2904	powershell.exe	31
PID 2904 wrote to memory of 2708	2904	powershell.exe	31
PID 2904 wrote to memory of 2708	2904	powershell.exe	31
PID 2904 wrote to memory of 2708	2904	powershell.exe	31
PID 2904 wrote to memory of 2708	2904	powershell.exe	31
PID 2904 wrote to memory of 2708	2904	powershell.exe	31
PID 2708 wrote to memory of 2740	2708	MSBuild.exe	32
PID 2708 wrote to memory of 2740	2708	MSBuild.exe	32
PID 2708 wrote to memory of 2740	2708	MSBuild.exe	32
PID 2708 wrote to memory of 2740	2708	MSBuild.exe	32

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\d9fa5b18b345033d9b02b1de41ab03c9.ps1
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2904
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
  "{path}"
  2⤵
  PID:1412
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
  "{path}"
  2⤵
  PID:2968
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
  "{path}"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2708
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2708 -s 492
    3⤵
    - Program crash
    PID:2740

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

memory/2708-26-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2708-17-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2708-13-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2708-23-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2708-28-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2708-19-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2708-21-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2708-24-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2708-30-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2708-15-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2904-11-0x0000000002A40000-0x0000000002AC0000-memory.dmp

Filesize
512KB

Download
memory/2904-10-0x0000000002A40000-0x0000000002AC0000-memory.dmp

Filesize
512KB

Download
memory/2904-9-0x0000000002A40000-0x0000000002AC0000-memory.dmp

Filesize
512KB

Download
memory/2904-5-0x0000000001E70000-0x0000000001E78000-memory.dmp

Filesize
32KB

Download
memory/2904-27-0x000007FEF57A0000-0x000007FEF613D000-memory.dmp

Filesize
9.6MB

Download
memory/2904-4-0x000000001B650000-0x000000001B932000-memory.dmp

Filesize
2.9MB

Download
memory/2904-8-0x000007FEF57A0000-0x000007FEF613D000-memory.dmp

Filesize
9.6MB

Download
memory/2904-7-0x0000000002A40000-0x0000000002AC0000-memory.dmp

Filesize
512KB

Download
memory/2904-6-0x000007FEF57A0000-0x000007FEF613D000-memory.dmp

Filesize
9.6MB

Download
memory/2904-12-0x00000000029E0000-0x00000000029EA000-memory.dmp

Filesize
40KB

Download