oski | 492ca440a9dc4c40b2e8384461c122f7e078c3f771a7457c8ec4eb35d0745e59

General

Target

JaffaCakes118_e7476f5c2d8d802c0737d9f7d92d0c53.ps1
Size

808KB
MD5

e7476f5c2d8d802c0737d9f7d92d0c53
SHA1

9f3ed412395af9bb3db4872e634acc99fc0ed250
SHA256

492ca440a9dc4c40b2e8384461c122f7e078c3f771a7457c8ec4eb35d0745e59
SHA512

35f6d0c3fcb4806349d657b0a2ce0fd51db2cb2eec968f04756ac3e45fb372aaf820f71a3d04260518b1b29b93df71b6f56b6bc61b2d809d9f21a663bef745dc
SSDEEP

1536:7CZD3zuq5Q5JH5BE3Lj84Ro77bDNW3WsN5K93TdMCNvWjxkIfnvODAU4V0pLyNU1:9

Score

10^/10

oski discovery execution infostealer

Malware Config

Extracted

Family

oski

C2

103.125.190.248/i1/

Signatures

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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2684 set thread context of 2692	2684	powershell.exe	31

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2684	powershell.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2968	2692	WerFault.exe	31

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jsc.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2684	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2684	powershell.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2684 wrote to memory of 2692	2684	powershell.exe	31
PID 2684 wrote to memory of 2692	2684	powershell.exe	31
PID 2684 wrote to memory of 2692	2684	powershell.exe	31
PID 2684 wrote to memory of 2692	2684	powershell.exe	31
PID 2684 wrote to memory of 2692	2684	powershell.exe	31
PID 2684 wrote to memory of 2692	2684	powershell.exe	31
PID 2684 wrote to memory of 2692	2684	powershell.exe	31
PID 2684 wrote to memory of 2692	2684	powershell.exe	31
PID 2684 wrote to memory of 2692	2684	powershell.exe	31
PID 2684 wrote to memory of 2692	2684	powershell.exe	31
PID 2692 wrote to memory of 2968	2692	jsc.exe	35
PID 2692 wrote to memory of 2968	2692	jsc.exe	35
PID 2692 wrote to memory of 2968	2692	jsc.exe	35
PID 2692 wrote to memory of 2968	2692	jsc.exe	35

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_e7476f5c2d8d802c0737d9f7d92d0c53.ps1
1⤵
- Suspicious use of SetThreadContext
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2684
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2692
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2692 -s 616
    3⤵
    - Program crash
    PID:2968

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2684-4-0x000007FEF612E000-0x000007FEF612F000-memory.dmp

Filesize
4KB

Download
memory/2684-5-0x000000001B520000-0x000000001B802000-memory.dmp

Filesize
2.9MB

Download
memory/2684-6-0x0000000002340000-0x0000000002348000-memory.dmp

Filesize
32KB

Download
memory/2684-7-0x000007FEF5E70000-0x000007FEF680D000-memory.dmp

Filesize
9.6MB

Download
memory/2684-8-0x000007FEF5E70000-0x000007FEF680D000-memory.dmp

Filesize
9.6MB

Download
memory/2684-9-0x000007FEF5E70000-0x000007FEF680D000-memory.dmp

Filesize
9.6MB

Download
memory/2684-10-0x0000000002A40000-0x0000000002A56000-memory.dmp

Filesize
88KB

Download
memory/2684-23-0x000007FEF5E70000-0x000007FEF680D000-memory.dmp

Filesize
9.6MB

Download
memory/2692-18-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2692-17-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2692-16-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2692-15-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2692-11-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2692-13-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2692-21-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2692-22-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2692-19-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2692-25-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download

Analysis

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