oski | 186150481a377bd29689e2b4c7bedb7cd41c9043f4bd7ce5ac25d9e4216aa8dd

General

Target

186150481a377bd29689e2b4c7bedb7cd41c9043f4bd7ce5ac25d9e4216aa8dd.exe
Size

200KB
MD5

fc2cec805baea261f034594150a624b2
SHA1

27e67b2e091bb0bbafdd5890ae1afa763de07a71
SHA256

186150481a377bd29689e2b4c7bedb7cd41c9043f4bd7ce5ac25d9e4216aa8dd
SHA512

217b72ad55614ac510c3771f84e879844fae5b8be406094079d30498169223efad8860477ae237fc4cd32cc0f5ce7d2f99cfffafd93f1875f64efe6b61066264

Score

10^/10

oski discovery infostealer spyware stealer suricata

Malware Config

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
suricata
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
suricata
Downloads MZ/PE file

Loads dropped DLL 3 IoCs

Processes:

186150481a377bd29689e2b4c7bedb7cd41c9043f4bd7ce5ac25d9e4216aa8dd.exe

pid	process
3732	186150481a377bd29689e2b4c7bedb7cd41c9043f4bd7ce5ac25d9e4216aa8dd.exe
3732	186150481a377bd29689e2b4c7bedb7cd41c9043f4bd7ce5ac25d9e4216aa8dd.exe
3732	186150481a377bd29689e2b4c7bedb7cd41c9043f4bd7ce5ac25d9e4216aa8dd.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
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:

186150481a377bd29689e2b4c7bedb7cd41c9043f4bd7ce5ac25d9e4216aa8dd.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	186150481a377bd29689e2b4c7bedb7cd41c9043f4bd7ce5ac25d9e4216aa8dd.exe

Kills process with taskkill 1 IoCs
evasion

Processes:

taskkill.exe

pid process

748 taskkill.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

taskkill.exe

description pid process

Token: SeDebugPrivilege 748 taskkill.exe

pid	process
748	taskkill.exe

description	pid	process
Token: SeDebugPrivilege	748	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

186150481a377bd29689e2b4c7bedb7cd41c9043f4bd7ce5ac25d9e4216aa8dd.execmd.exe

description	pid	process	target process
PID 3732 wrote to memory of 1008	3732	186150481a377bd29689e2b4c7bedb7cd41c9043f4bd7ce5ac25d9e4216aa8dd.exe	cmd.exe
PID 3732 wrote to memory of 1008	3732	186150481a377bd29689e2b4c7bedb7cd41c9043f4bd7ce5ac25d9e4216aa8dd.exe	cmd.exe
PID 3732 wrote to memory of 1008	3732	186150481a377bd29689e2b4c7bedb7cd41c9043f4bd7ce5ac25d9e4216aa8dd.exe	cmd.exe
PID 1008 wrote to memory of 748	1008	cmd.exe	taskkill.exe
PID 1008 wrote to memory of 748	1008	cmd.exe	taskkill.exe
PID 1008 wrote to memory of 748	1008	cmd.exe	taskkill.exe

C:\Users\Admin\AppData\Local\Temp\186150481a377bd29689e2b4c7bedb7cd41c9043f4bd7ce5ac25d9e4216aa8dd.exe
"C:\Users\Admin\AppData\Local\Temp\186150481a377bd29689e2b4c7bedb7cd41c9043f4bd7ce5ac25d9e4216aa8dd.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:3732

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c taskkill /pid 3732 & erase C:\Users\Admin\AppData\Local\Temp\186150481a377bd29689e2b4c7bedb7cd41c9043f4bd7c' & RD /S /Q C:\\ProgramData\\226247405064065\\* & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:1008

C:\Windows\SysWOW64\taskkill.exe
taskkill /pid 3732
3⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:748

Network

MITRE ATT&CK Matrix ATT&CK 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

Exfiltration

Command and Control

Impact

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Downloads

\ProgramData\mozglue.dll
MD5
8f73c08a9660691143661bf7332c3c27

SHA1
37fa65dd737c50fda710fdbde89e51374d0c204a

SHA256
3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

SHA512
0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

Download Submit
\ProgramData\nss3.dll
MD5
bfac4e3c5908856ba17d41edcd455a51

SHA1
8eec7e888767aa9e4cca8ff246eb2aacb9170428

SHA256
e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

SHA512
2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

Download Submit
\ProgramData\sqlite3.dll
MD5
e477a96c8f2b18d6b5c27bde49c990bf

SHA1
e980c9bf41330d1e5bd04556db4646a0210f7409

SHA256
16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660

SHA512
335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

Download Submit
memory/748-122-0x0000000000000000-mapping.dmp

Download
memory/1008-121-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads