oski | a59fbc4f9903ed18c989e87bc83073b463310ffe6c90a43c53400739719d0aae

General

Target

FLP_1037850047.exe
Size

379KB
MD5

d32bc982566fbb8d81d3012779d3c320
SHA1

74e5c60af59a50757abc29942c888fa43e854204
SHA256

a59fbc4f9903ed18c989e87bc83073b463310ffe6c90a43c53400739719d0aae
SHA512

de6afafb1412a652405072ba6f123383baa55e9287bbbef8a2e9c25edbfdebb6bf9e8aa1834caf386384096ce7eaa3c9dc03b7831f134ad8ccc4c98f066db699

Score

10^/10

oski discovery infostealer spyware stealer

Malware Config

Extracted

Family

oski

C2

duiy.xyz

Signatures

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

Processes:

cmd.exe

pid process

1820 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
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:

FLP_1037850047.exe

description pid process target process

PID 980 set thread context of 1276 980 FLP_1037850047.exe FLP_1037850047.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
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:

FLP_1037850047.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString FLP_1037850047.exe
Kills process with taskkill 1 IoCs
evasion

Processes:

taskkill.exe

pid process

1848 taskkill.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

FLP_1037850047.exe

pid process

980 FLP_1037850047.exe
980 FLP_1037850047.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

FLP_1037850047.exetaskkill.exe

description pid process

Token: SeDebugPrivilege 980 FLP_1037850047.exe
Token: SeDebugPrivilege 1848 taskkill.exe

pid	process
1820	cmd.exe

description	pid	process	target process
PID 980 set thread context of 1276	980	FLP_1037850047.exe	FLP_1037850047.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	FLP_1037850047.exe

pid	process
1848	taskkill.exe

pid	process
980	FLP_1037850047.exe
980	FLP_1037850047.exe

description	pid	process
Token: SeDebugPrivilege	980	FLP_1037850047.exe
Token: SeDebugPrivilege	1848	taskkill.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

FLP_1037850047.exeFLP_1037850047.execmd.exe

description	pid	process	target process
PID 980 wrote to memory of 1276	980	FLP_1037850047.exe	FLP_1037850047.exe
PID 980 wrote to memory of 1276	980	FLP_1037850047.exe	FLP_1037850047.exe
PID 980 wrote to memory of 1276	980	FLP_1037850047.exe	FLP_1037850047.exe
PID 980 wrote to memory of 1276	980	FLP_1037850047.exe	FLP_1037850047.exe
PID 980 wrote to memory of 1276	980	FLP_1037850047.exe	FLP_1037850047.exe
PID 980 wrote to memory of 1276	980	FLP_1037850047.exe	FLP_1037850047.exe
PID 980 wrote to memory of 1276	980	FLP_1037850047.exe	FLP_1037850047.exe
PID 980 wrote to memory of 1276	980	FLP_1037850047.exe	FLP_1037850047.exe
PID 980 wrote to memory of 1276	980	FLP_1037850047.exe	FLP_1037850047.exe
PID 980 wrote to memory of 1276	980	FLP_1037850047.exe	FLP_1037850047.exe
PID 1276 wrote to memory of 1820	1276	FLP_1037850047.exe	cmd.exe
PID 1276 wrote to memory of 1820	1276	FLP_1037850047.exe	cmd.exe
PID 1276 wrote to memory of 1820	1276	FLP_1037850047.exe	cmd.exe
PID 1276 wrote to memory of 1820	1276	FLP_1037850047.exe	cmd.exe
PID 1820 wrote to memory of 1848	1820	cmd.exe	taskkill.exe
PID 1820 wrote to memory of 1848	1820	cmd.exe	taskkill.exe
PID 1820 wrote to memory of 1848	1820	cmd.exe	taskkill.exe
PID 1820 wrote to memory of 1848	1820	cmd.exe	taskkill.exe

C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
"C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:980
- C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
  C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
  2⤵
  - Checks processor information in registry
  - Suspicious use of WriteProcessMemory
  PID:1276
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c taskkill /pid 1276 & erase C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe & RD /S /Q C:\\ProgramData\\693626471404372\\* & exit
    3⤵
    - Deletes itself
    - Suspicious use of WriteProcessMemory
    PID:1820
  - - C:\Windows\SysWOW64\taskkill.exe
      taskkill /pid 1276
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:1848

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/980-60-0x0000000001150000-0x0000000001151000-memory.dmp

Filesize
4KB

Download
memory/980-62-0x0000000004A30000-0x0000000004A31000-memory.dmp

Filesize
4KB

Download
memory/980-63-0x00000000003D0000-0x00000000003D5000-memory.dmp

Filesize
20KB

Download
memory/980-64-0x00000000004C0000-0x00000000004DD000-memory.dmp

Filesize
116KB

Download
memory/1276-65-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1276-66-0x000000000040717B-mapping.dmp

Download
memory/1276-67-0x0000000075FF1000-0x0000000075FF3000-memory.dmp

Filesize
8KB

Download
memory/1276-68-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1820-69-0x0000000000000000-mapping.dmp

Download
memory/1848-70-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing