oski | 84881b1a60042a853baf05ca0dcfdbdb85c72edfc8c6d46493fe6e4f6697b2f6

General

Target

90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe
Size

804KB
MD5

90a2d295d4e5950379bba11c562c6d70
SHA1

088a10386ddfb15aef4c74666719f88b6eb91506
SHA256

84881b1a60042a853baf05ca0dcfdbdb85c72edfc8c6d46493fe6e4f6697b2f6
SHA512

3635140742bb2c27b9d6b922ecbdc9ff547a24019821a47b8094eda005973b8d2130af82830e6aa72fcdb397c994997eece1c9306d68218d61c16cb3375e0f90
SSDEEP

12288:yjYTIwsaZUj43HOZGkocfj/YwIlfZkJOT7y5s+7:yj/wsGcfrQRkc7Mr7

Score

10^/10

oski discovery execution infostealer spyware stealer

Malware Config

Extracted

Family

oski

C2

samsungprod.xyz

Signatures

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

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

Processes:

powershell.exe

pid	Process
2764	powershell.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Suspicious use of SetThreadContext 1 IoCs

Processes:

90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe

description	pid	Process	procid_target
PID 2528 set thread context of 1312	2528	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe	34

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

Processes:

WerFault.exe

pid	pid_target	Process	procid_target
2576	1312	WerFault.exe	34

System Location Discovery: System Language Discovery 1 TTPs 4 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

Processes:

90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exepowershell.exeschtasks.exe90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

Processes:

schtasks.exe

pid	Process
2916	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exepowershell.exe

pid	Process
2528	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe
2528	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe
2764	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exepowershell.exe

description	pid	Process
Token: SeDebugPrivilege	2528	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe
Token: SeDebugPrivilege	2764	powershell.exe

Suspicious use of WriteProcessMemory 22 IoCs

Processes:

90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe

description	pid	Process	procid_target
PID 2528 wrote to memory of 2764	2528	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe	31
PID 2528 wrote to memory of 2764	2528	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe	31
PID 2528 wrote to memory of 2764	2528	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe	31
PID 2528 wrote to memory of 2764	2528	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe	31
PID 2528 wrote to memory of 2916	2528	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe	33
PID 2528 wrote to memory of 2916	2528	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe	33
PID 2528 wrote to memory of 2916	2528	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe	33
PID 2528 wrote to memory of 2916	2528	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe	33
PID 2528 wrote to memory of 1312	2528	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe	34
PID 2528 wrote to memory of 1312	2528	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe	34
PID 2528 wrote to memory of 1312	2528	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe	34
PID 2528 wrote to memory of 1312	2528	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe	34
PID 2528 wrote to memory of 1312	2528	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe	34
PID 2528 wrote to memory of 1312	2528	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe	34
PID 2528 wrote to memory of 1312	2528	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe	34
PID 2528 wrote to memory of 1312	2528	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe	34
PID 2528 wrote to memory of 1312	2528	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe	34
PID 2528 wrote to memory of 1312	2528	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe	34
PID 1312 wrote to memory of 2576	1312	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe	37
PID 1312 wrote to memory of 2576	1312	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe	37
PID 1312 wrote to memory of 2576	1312	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe	37
PID 1312 wrote to memory of 2576	1312	90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe	37

C:\Users\Admin\AppData\Local\Temp\90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2528
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2764
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\HJCiKD" /XML "C:\Users\Admin\AppData\Local\Temp\tmp5773.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2916
- C:\Users\Admin\AppData\Local\Temp\90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\90a2d295d4e5950379bba11c562c6d70_JaffaCakes118.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1312
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1312 -s 760
    3⤵
    - Program crash
    PID:2576

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\msvcp140.dll

Filesize
1B

MD5
7215ee9c7d9dc229d2921a40e899ec5f

SHA1
b858cb282617fb0956d960215c8e84d1ccf909c6

SHA256
36a9e7f1c95b82ffb99743e0c5c4ce95d83c9a430aac59f84ef3cbfab6145068

SHA512
f90ddd77e400dfe6a3fcf479b00b1ee29e7015c5bb8cd70f5f15b4886cc339275ff553fc8a053f8ddc7324f45168cffaf81f8c3ac93996f6536eef38e5e40768

Download Submit
memory/1312-24-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1312-15-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1312-13-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1312-20-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1312-25-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1312-17-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1312-19-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1312-23-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1312-18-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1312-38-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2528-3-0x00000000005D0000-0x00000000005DC000-memory.dmp

Filesize
48KB

Download
memory/2528-7-0x00000000007D0000-0x000000000080A000-memory.dmp

Filesize
232KB

Download
memory/2528-6-0x0000000005140000-0x00000000051AE000-memory.dmp

Filesize
440KB

Download
memory/2528-2-0x0000000074CE0000-0x00000000753CE000-memory.dmp

Filesize
6.9MB

Download
memory/2528-0-0x0000000074CEE000-0x0000000074CEF000-memory.dmp

Filesize
4KB

Download
memory/2528-26-0x0000000074CE0000-0x00000000753CE000-memory.dmp

Filesize
6.9MB

Download
memory/2528-5-0x0000000074CE0000-0x00000000753CE000-memory.dmp

Filesize
6.9MB

Download
memory/2528-1-0x0000000000F40000-0x000000000100E000-memory.dmp

Filesize
824KB

Download
memory/2528-4-0x0000000074CEE000-0x0000000074CEF000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads