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 1652 set thread context of 700	1652	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	29

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
364	taskkill.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1652	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe
Token: SeDebugPrivilege	364	taskkill.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1652 wrote to memory of 700	1652	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	29
PID 1652 wrote to memory of 700	1652	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	29
PID 1652 wrote to memory of 700	1652	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	29
PID 1652 wrote to memory of 700	1652	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	29
PID 1652 wrote to memory of 700	1652	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	29
PID 1652 wrote to memory of 700	1652	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	29
PID 1652 wrote to memory of 700	1652	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	29
PID 1652 wrote to memory of 700	1652	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	29
PID 1652 wrote to memory of 700	1652	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	29
PID 1652 wrote to memory of 700	1652	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	29
PID 700 wrote to memory of 556	700	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	32
PID 700 wrote to memory of 556	700	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	32
PID 700 wrote to memory of 556	700	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	32
PID 700 wrote to memory of 556	700	6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe	32
PID 556 wrote to memory of 364	556	cmd.exe	34
PID 556 wrote to memory of 364	556	cmd.exe	34
PID 556 wrote to memory of 364	556	cmd.exe	34
PID 556 wrote to memory of 364	556	cmd.exe	34

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:1652
- C:\Users\Admin\AppData\Local\Temp\6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.exe
  "{path}"
  2⤵
  - Checks processor information in registry
  - Suspicious use of WriteProcessMemory
  PID:700
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c taskkill /pid 700 & erase C:\Users\Admin\AppData\Local\Temp\6FB172BB9C23B3A8067A40F09264C3FA8ECB4F081C659.' & RD /S /Q C:\\ProgramData\\326478215619950\\* & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:556
  - - C:\Windows\SysWOW64\taskkill.exe
      taskkill /pid 700
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:364

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

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Downloads

memory/700-66-0x0000000000400000-0x0000000000438000-memory.dmp

Download

memory/700-68-0x00000000754F1000-0x00000000754F3000-memory.dmp

Download

memory/700-69-0x0000000000400000-0x0000000000438000-memory.dmp

Download

memory/1652-60-0x0000000000C20000-0x0000000000C21000-memory.dmp

Download

memory/1652-62-0x0000000004E90000-0x0000000004E91000-memory.dmp

Download

memory/1652-63-0x0000000000370000-0x0000000000371000-memory.dmp

Download

memory/1652-64-0x0000000000380000-0x0000000000382000-memory.dmp

Download

memory/1652-65-0x0000000004420000-0x000000000445A000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads