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-1-5-21-1302416131-1437503476-2806442725-1000\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 404 set thread context of 5016	404	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	87

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3596	5016	WerFault.exe	87

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
404	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe
404	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe
404	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	404	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 404 wrote to memory of 5016	404	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	87
PID 404 wrote to memory of 5016	404	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	87
PID 404 wrote to memory of 5016	404	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	87
PID 404 wrote to memory of 5016	404	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	87
PID 404 wrote to memory of 5016	404	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	87
PID 404 wrote to memory of 5016	404	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	87
PID 404 wrote to memory of 5016	404	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	87
PID 404 wrote to memory of 5016	404	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	87
PID 404 wrote to memory of 5016	404	a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe	87

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:404
- C:\Users\Admin\AppData\Local\Temp\a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe
  "C:\Users\Admin\AppData\Local\Temp\a7c9e0bba10b853dd183f2c6b732bd0e1001f1a7b455007dc3022ff465b7797f.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5016
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 5016 -s 1824
    3⤵
    - Program crash
    PID:3596

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 5016 -ip 5016
1⤵
PID:936

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
599a7976d009373fc475393525fc14e8

SHA1
6f5792664f278c833e0775e84df8d0c3d25df1ba

SHA256
67c2b4d5f06bd93e4ecd49b3402d01f39dc8ffffe2c8403f33893efccbb0d0a2

SHA512
65e0c3919e6eeabe86bc077a7ca80e3c66d7790bb703fd2694f04ebf3df78fbc29edfdb8e9aaf910da143fd09de63a141be67f667e60c17f3a97b6041f869256

Download Submit
memory/404-5-0x0000000005840000-0x00000000058DC000-memory.dmp

Filesize
624KB

Download
memory/404-14-0x0000000074E70000-0x0000000075620000-memory.dmp

Filesize
7.7MB

Download
memory/404-3-0x0000000005C50000-0x00000000061F4000-memory.dmp

Filesize
5.6MB

Download
memory/404-4-0x00000000057A0000-0x0000000005832000-memory.dmp

Filesize
584KB

Download
memory/404-6-0x0000000074E70000-0x0000000075620000-memory.dmp

Filesize
7.7MB

Download
memory/404-0-0x0000000074E7E000-0x0000000074E7F000-memory.dmp

Filesize
4KB

Download
memory/404-8-0x0000000005360000-0x000000000536A000-memory.dmp

Filesize
40KB

Download
memory/404-2-0x0000000002E30000-0x0000000002E36000-memory.dmp

Filesize
24KB

Download
memory/404-1-0x0000000000930000-0x000000000099C000-memory.dmp

Filesize
432KB

Download
memory/5016-10-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/5016-13-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/5016-12-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/5016-9-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/5016-31-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads