oski | b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf

Analysis

max time kernel
51s
max time network
49s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
29-01-2023 19:43

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General

Target

b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
Size

310KB
MD5

f2ad6ac9e0bc7297c13a28f6d6af85a5
SHA1

af31c785efd47081181f8d030b97dca8f372700a
SHA256

b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf
SHA512

22dba23872534504680cfc78631be8aa5bb7462b293078758aa77663fd09c74ed871b5f230235c7092c2ecc67bc14fe98984d9c80f115f05623797dd1b62f645
SSDEEP

6144:W5kNQIVGURZU/kb+K8FAZdKPznvNYTAOjjhLnWQvdFCEWPQczgZyKxxlH:W5TQRZUG+KAqdKrvOTnZtVjWPQczsnp

Score

10^/10

oski infostealer spyware stealer

Malware Config

Extracted

Family

oski

timecforgoodnes.ml

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski
Executes dropped EXE 1 IoCs

Processes:

b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe

pid process

612 b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe

pid	process
612	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe

Drops startup file 1 IoCs

Processes:

b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\system.js	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe

Loads dropped DLL 9 IoCs

Processes:

b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exeb6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exeWerFault.exe

pid	process
1884	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
612	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
612	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
612	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
1248	WerFault.exe
1248	WerFault.exe
1248	WerFault.exe
1248	WerFault.exe
1248	WerFault.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

Suspicious use of SetThreadContext 1 IoCs

Processes:

b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe

description	pid	process	target process
PID 1884 set thread context of 612	1884	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1248 612 WerFault.exe b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe

pid	pid_target	process	target process
1248	612	WerFault.exe	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe

pid	process
1884	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
1884	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
1884	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
1884	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
1884	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
1884	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
1884	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe

description pid process

Token: SeDebugPrivilege 1884 b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe

description	pid	process
Token: SeDebugPrivilege	1884	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exeb6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe

C:\Users\Admin\AppData\Local\Temp\b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
"C:\Users\Admin\AppData\Local\Temp\b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe"
1⤵
- Drops startup file
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1884

C:\Users\Admin\AppData\Local\Temp\b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
"C:\Users\Admin\AppData\Local\Temp\b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe"
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:612

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 612 -s 908
3⤵
- Loads dropped DLL
- Program crash
PID:1248

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
Filesize
310KB

MD5
f2ad6ac9e0bc7297c13a28f6d6af85a5

SHA1
af31c785efd47081181f8d030b97dca8f372700a

SHA256
b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf

SHA512
22dba23872534504680cfc78631be8aa5bb7462b293078758aa77663fd09c74ed871b5f230235c7092c2ecc67bc14fe98984d9c80f115f05623797dd1b62f645

Download Submit
\Users\Admin\AppData\Local\Temp\b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
Filesize
310KB

MD5
f2ad6ac9e0bc7297c13a28f6d6af85a5

SHA1
af31c785efd47081181f8d030b97dca8f372700a

SHA256
b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf

SHA512
22dba23872534504680cfc78631be8aa5bb7462b293078758aa77663fd09c74ed871b5f230235c7092c2ecc67bc14fe98984d9c80f115f05623797dd1b62f645

Download Submit
\Users\Admin\AppData\Local\Temp\b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
Filesize
310KB

MD5
f2ad6ac9e0bc7297c13a28f6d6af85a5

SHA1
af31c785efd47081181f8d030b97dca8f372700a

SHA256
b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf

SHA512
22dba23872534504680cfc78631be8aa5bb7462b293078758aa77663fd09c74ed871b5f230235c7092c2ecc67bc14fe98984d9c80f115f05623797dd1b62f645

Download Submit
\Users\Admin\AppData\Local\Temp\b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
Filesize
310KB

MD5
f2ad6ac9e0bc7297c13a28f6d6af85a5

SHA1
af31c785efd47081181f8d030b97dca8f372700a

SHA256
b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf

SHA512
22dba23872534504680cfc78631be8aa5bb7462b293078758aa77663fd09c74ed871b5f230235c7092c2ecc67bc14fe98984d9c80f115f05623797dd1b62f645

Download Submit
\Users\Admin\AppData\Local\Temp\b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
Filesize
310KB

MD5
f2ad6ac9e0bc7297c13a28f6d6af85a5

SHA1
af31c785efd47081181f8d030b97dca8f372700a

SHA256
b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf

SHA512
22dba23872534504680cfc78631be8aa5bb7462b293078758aa77663fd09c74ed871b5f230235c7092c2ecc67bc14fe98984d9c80f115f05623797dd1b62f645

Download Submit
\Users\Admin\AppData\Local\Temp\b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
Filesize
310KB

MD5
f2ad6ac9e0bc7297c13a28f6d6af85a5

SHA1
af31c785efd47081181f8d030b97dca8f372700a

SHA256
b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf

SHA512
22dba23872534504680cfc78631be8aa5bb7462b293078758aa77663fd09c74ed871b5f230235c7092c2ecc67bc14fe98984d9c80f115f05623797dd1b62f645

Download Submit
\Users\Admin\AppData\Local\Temp\b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
Filesize
310KB

MD5
f2ad6ac9e0bc7297c13a28f6d6af85a5

SHA1
af31c785efd47081181f8d030b97dca8f372700a

SHA256
b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf

SHA512
22dba23872534504680cfc78631be8aa5bb7462b293078758aa77663fd09c74ed871b5f230235c7092c2ecc67bc14fe98984d9c80f115f05623797dd1b62f645

Download Submit
\Users\Admin\AppData\Local\Temp\b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
Filesize
310KB

MD5
f2ad6ac9e0bc7297c13a28f6d6af85a5

SHA1
af31c785efd47081181f8d030b97dca8f372700a

SHA256
b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf

SHA512
22dba23872534504680cfc78631be8aa5bb7462b293078758aa77663fd09c74ed871b5f230235c7092c2ecc67bc14fe98984d9c80f115f05623797dd1b62f645

Download Submit
\Users\Admin\AppData\Local\Temp\b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
Filesize
310KB

MD5
f2ad6ac9e0bc7297c13a28f6d6af85a5

SHA1
af31c785efd47081181f8d030b97dca8f372700a

SHA256
b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf

SHA512
22dba23872534504680cfc78631be8aa5bb7462b293078758aa77663fd09c74ed871b5f230235c7092c2ecc67bc14fe98984d9c80f115f05623797dd1b62f645

Download Submit
\Users\Admin\AppData\Local\Temp\b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
Filesize
310KB

MD5
f2ad6ac9e0bc7297c13a28f6d6af85a5

SHA1
af31c785efd47081181f8d030b97dca8f372700a

SHA256
b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf

SHA512
22dba23872534504680cfc78631be8aa5bb7462b293078758aa77663fd09c74ed871b5f230235c7092c2ecc67bc14fe98984d9c80f115f05623797dd1b62f645

Download Submit
memory/612-65-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/612-67-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/612-68-0x000000000040717B-mapping.dmp

Download
memory/612-58-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/612-72-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/612-85-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/612-63-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/612-61-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/612-78-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/612-59-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1248-79-0x0000000000000000-mapping.dmp

Download
memory/1884-54-0x0000000076171000-0x0000000076173000-memory.dmp

Filesize
8KB

Download
memory/1884-71-0x00000000749B0000-0x0000000074F5B000-memory.dmp

Filesize
5.7MB

Download
memory/1884-56-0x00000000749B0000-0x0000000074F5B000-memory.dmp

Filesize
5.7MB

Download
memory/1884-55-0x00000000749B0000-0x0000000074F5B000-memory.dmp

Filesize
5.7MB

Download

description	pid	process	target process
PID 1884 wrote to memory of 612	1884	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
PID 1884 wrote to memory of 612	1884	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
PID 1884 wrote to memory of 612	1884	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
PID 1884 wrote to memory of 612	1884	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
PID 1884 wrote to memory of 612	1884	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
PID 1884 wrote to memory of 612	1884	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
PID 1884 wrote to memory of 612	1884	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
PID 1884 wrote to memory of 612	1884	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
PID 1884 wrote to memory of 612	1884	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
PID 1884 wrote to memory of 612	1884	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
PID 1884 wrote to memory of 612	1884	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
PID 1884 wrote to memory of 612	1884	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
PID 1884 wrote to memory of 612	1884	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
PID 612 wrote to memory of 1248	612	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	WerFault.exe
PID 612 wrote to memory of 1248	612	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	WerFault.exe
PID 612 wrote to memory of 1248	612	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	WerFault.exe
PID 612 wrote to memory of 1248	612	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	WerFault.exe
PID 612 wrote to memory of 1248	612	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	WerFault.exe
PID 612 wrote to memory of 1248	612	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	WerFault.exe
PID 612 wrote to memory of 1248	612	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	WerFault.exe