oski | 6fb172bb9c23b3a8067a40f09264c3fa8ecb4f081c659de59560c5d52364d9e9

General

Target
6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe
Size 1.4MB
Sample210511-9fd8whe34j
SHA256 6fb172bb9c23b3a8067a40f09264c3fa8ecb4f081c659de59560c5d52364d9e9
MD5 bf8ab0b1bfc29c194ef553d0246199d0
SHA1 f5f170eed6e8cfbf42f605e2a21bfcf1d772a348
SHA512 b1c3c9efe4739b3b5a1e97bcdd52ca285082906afd9a8bdd083e7708a77a9539171a5545abded6414c44b64a6a94a7973b434f95e9a6e73f4c5b758dda778881
MD5 SHA1 SHA512

Score

10^/10

oski discovery infostealer spyware stealer

Malware Config

Extracted

Family

oski

C2

45.87.2.131

Signatures

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

description	pid	Process	procid_target
PID 3680 set thread context of 1844	3680	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	79

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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
996	taskkill.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3680	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe
Token: SeDebugPrivilege	996	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3680 wrote to memory of 1844	3680	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	79
PID 3680 wrote to memory of 1844	3680	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	79
PID 3680 wrote to memory of 1844	3680	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	79
PID 3680 wrote to memory of 1844	3680	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	79
PID 3680 wrote to memory of 1844	3680	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	79
PID 3680 wrote to memory of 1844	3680	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	79
PID 3680 wrote to memory of 1844	3680	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	79
PID 3680 wrote to memory of 1844	3680	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	79
PID 3680 wrote to memory of 1844	3680	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	79
PID 1844 wrote to memory of 2192	1844	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	80
PID 1844 wrote to memory of 2192	1844	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	80
PID 1844 wrote to memory of 2192	1844	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	80
PID 2192 wrote to memory of 996	2192	cmd.exe	82
PID 2192 wrote to memory of 996	2192	cmd.exe	82
PID 2192 wrote to memory of 996	2192	cmd.exe	82

C:\Users\Admin\AppData\Local\Temp\6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe
"C:\Users\Admin\AppData\Local\Temp\6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3680
- C:\Users\Admin\AppData\Local\Temp\6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe
  "{path}"
  2⤵
  - Checks processor information in registry
  - Suspicious use of WriteProcessMemory
  PID:1844
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c taskkill /pid 1844 & erase C:\Users\Admin\AppData\Local\Temp\6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.' & RD /S /Q C:\\ProgramData\\290146885769989\\* & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2192
  - - C:\Windows\SysWOW64\taskkill.exe
      taskkill /pid 1844
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:996

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/1844-123-0x0000000000400000-0x0000000000438000-memory.dmp

Download

memory/1844-125-0x0000000000400000-0x0000000000438000-memory.dmp

Download

memory/3680-118-0x00000000054E0000-0x00000000054E2000-memory.dmp

Download

memory/3680-121-0x0000000001530000-0x0000000001531000-memory.dmp

Download

memory/3680-122-0x0000000005A70000-0x0000000005AAA000-memory.dmp

Download

memory/3680-120-0x00000000055B0000-0x00000000055B1000-memory.dmp

Download

memory/3680-119-0x0000000005660000-0x0000000005661000-memory.dmp

Download

memory/3680-114-0x0000000000B10000-0x0000000000B11000-memory.dmp

Download

memory/3680-117-0x00000000054F0000-0x00000000054F1000-memory.dmp

Download

memory/3680-116-0x0000000005AC0000-0x0000000005AC1000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads