oski | c2a7f190f90a0517a791e5ad8bd8941f6639f84d7e45d6c3b3099adfae1b7e17

General

Target

a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe
Size

396KB
MD5

8d97f71457a0a2977a82571583306c26
SHA1

936800c740c13a3fc2e05a1c1376007f58002a7d
SHA256

a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f
SHA512

5708375538d7b9927784809912a0b0588e200aaf62668226b9b83c2c4879306d989bef3033807bd7bb8989a56b58b2369b42327968f23f2dddc6d9b2975c51f5
SSDEEP

12288:7ycqterR53JplKiFwgxtQ9LdQAGAHUq/uzK6UA8t9HHHHHHHHHIHHHHHHczJXNAG:7QtervJXzQ9L

Score

10^/10

oski credential_access discovery infostealer persistence spyware stealer

Malware Config

Extracted

Family

oski

C2

forum.daffodil-bd.com

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003
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
T1552.001

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\Windows Services = "C:\\Users\\Admin\\AppData\\Roaming\\Windows Update Folder\\Windows Update.exe"	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2188 set thread context of 2732	2188	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	30

Program crash 1 IoCs

pid	pid_target	Process	procid_target
900	2732	WerFault.exe	30

System Location Discovery: System Language Discovery 1 TTPs 2 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	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2188	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe
2188	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe
2188	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2188	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2188 wrote to memory of 2732	2188	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	30
PID 2188 wrote to memory of 2732	2188	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	30
PID 2188 wrote to memory of 2732	2188	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	30
PID 2188 wrote to memory of 2732	2188	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	30
PID 2188 wrote to memory of 2732	2188	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	30
PID 2188 wrote to memory of 2732	2188	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	30
PID 2188 wrote to memory of 2732	2188	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	30
PID 2188 wrote to memory of 2732	2188	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	30
PID 2188 wrote to memory of 2732	2188	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	30
PID 2188 wrote to memory of 2732	2188	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	30
PID 2732 wrote to memory of 900	2732	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	32
PID 2732 wrote to memory of 900	2732	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	32
PID 2732 wrote to memory of 900	2732	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	32
PID 2732 wrote to memory of 900	2732	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	32

C:\Users\Admin\AppData\Local\Temp\a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe
"C:\Users\Admin\AppData\Local\Temp\a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2188
- C:\Users\Admin\AppData\Local\Temp\a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe
  "C:\Users\Admin\AppData\Local\Temp\a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2732
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2732 -s 608
    3⤵
    - Program crash
    PID:900

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

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 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
9KB

MD5
0b971a264a6b041edc4057c1fc0f6c10

SHA1
08854f0e0f85f32c4aad009a6c2f1d54d2c018f8

SHA256
5d7b95680c514128a801a8d0ea82b0f9000c5b04e2ceb6b3ecce0f6f9cc67b59

SHA512
e6ad9473a21be1996c112adba904fcd0fab7b5f662f278d3e1e5fbd7c76a50fba73566016dc1be5ddd6932abed3055c9d33f010894861ccbe5707f3d9dfdc77a

Download Submit
memory/2188-0-0x00000000749FE000-0x00000000749FF000-memory.dmp

Filesize
4KB

Download
memory/2188-1-0x0000000000980000-0x00000000009EC000-memory.dmp

Filesize
432KB

Download
memory/2188-2-0x0000000000330000-0x0000000000336000-memory.dmp

Filesize
24KB

Download
memory/2188-4-0x00000000749F0000-0x00000000750DE000-memory.dmp

Filesize
6.9MB

Download
memory/2188-16-0x00000000749F0000-0x00000000750DE000-memory.dmp

Filesize
6.9MB

Download
memory/2188-5-0x0000000000460000-0x000000000046A000-memory.dmp

Filesize
40KB

Download
memory/2732-10-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2732-13-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2732-9-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2732-8-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2732-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2732-15-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2732-17-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2732-7-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2732-6-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads