oski | e8b4e90cb7a9233231088d027c2c090aafc143c77e1f46d34d6b206c2c797419

General

Target

SCAN_Wells Fargo bank payment.exe
Size

912KB
MD5

e2e01c7a8e323e117cfc9c4cdf0ad1c2
SHA1

ea718bc482d968f9db9577b8d9edb08e4f24abbd
SHA256

e8b4e90cb7a9233231088d027c2c090aafc143c77e1f46d34d6b206c2c797419
SHA512

53a677c7e4f2968319c5d464446e7c777c9b7f61fed01cf5225c121fea661b65c24dc358d52fece233b24db18b1fd1d95d4bc580860c93bb803c77a87c260215

Score

10^/10

oski infostealer spyware stealer

Malware Config

Extracted

Family

oski

C2

mmcjo.com/crown/

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
Suspicious use of SetThreadContext 1 IoCs

Processes:

SCAN_Wells Fargo bank payment.exe

description pid process target process

PID 684 set thread context of 1108 684 SCAN_Wells Fargo bank payment.exe SCAN_Wells Fargo bank payment.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

568 1108 WerFault.exe SCAN_Wells Fargo bank payment.exe
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

688 schtasks.exe
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

WerFault.exe

pid process

568 WerFault.exe
568 WerFault.exe
568 WerFault.exe
568 WerFault.exe
568 WerFault.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

WerFault.exe

description pid process

Token: SeDebugPrivilege 568 WerFault.exe

description	pid	process	target process
PID 684 set thread context of 1108	684	SCAN_Wells Fargo bank payment.exe	SCAN_Wells Fargo bank payment.exe

pid	pid_target	process	target process
568	1108	WerFault.exe	SCAN_Wells Fargo bank payment.exe

pid	process
688	schtasks.exe

pid	process
568	WerFault.exe
568	WerFault.exe
568	WerFault.exe
568	WerFault.exe
568	WerFault.exe

description	pid	process
Token: SeDebugPrivilege	568	WerFault.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

SCAN_Wells Fargo bank payment.exeSCAN_Wells Fargo bank payment.exe

description	pid	process	target process
PID 684 wrote to memory of 688	684	SCAN_Wells Fargo bank payment.exe	schtasks.exe
PID 684 wrote to memory of 688	684	SCAN_Wells Fargo bank payment.exe	schtasks.exe
PID 684 wrote to memory of 688	684	SCAN_Wells Fargo bank payment.exe	schtasks.exe
PID 684 wrote to memory of 688	684	SCAN_Wells Fargo bank payment.exe	schtasks.exe
PID 684 wrote to memory of 1108	684	SCAN_Wells Fargo bank payment.exe	SCAN_Wells Fargo bank payment.exe
PID 684 wrote to memory of 1108	684	SCAN_Wells Fargo bank payment.exe	SCAN_Wells Fargo bank payment.exe
PID 684 wrote to memory of 1108	684	SCAN_Wells Fargo bank payment.exe	SCAN_Wells Fargo bank payment.exe
PID 684 wrote to memory of 1108	684	SCAN_Wells Fargo bank payment.exe	SCAN_Wells Fargo bank payment.exe
PID 684 wrote to memory of 1108	684	SCAN_Wells Fargo bank payment.exe	SCAN_Wells Fargo bank payment.exe
PID 684 wrote to memory of 1108	684	SCAN_Wells Fargo bank payment.exe	SCAN_Wells Fargo bank payment.exe
PID 684 wrote to memory of 1108	684	SCAN_Wells Fargo bank payment.exe	SCAN_Wells Fargo bank payment.exe
PID 684 wrote to memory of 1108	684	SCAN_Wells Fargo bank payment.exe	SCAN_Wells Fargo bank payment.exe
PID 684 wrote to memory of 1108	684	SCAN_Wells Fargo bank payment.exe	SCAN_Wells Fargo bank payment.exe
PID 684 wrote to memory of 1108	684	SCAN_Wells Fargo bank payment.exe	SCAN_Wells Fargo bank payment.exe
PID 1108 wrote to memory of 568	1108	SCAN_Wells Fargo bank payment.exe	WerFault.exe
PID 1108 wrote to memory of 568	1108	SCAN_Wells Fargo bank payment.exe	WerFault.exe
PID 1108 wrote to memory of 568	1108	SCAN_Wells Fargo bank payment.exe	WerFault.exe
PID 1108 wrote to memory of 568	1108	SCAN_Wells Fargo bank payment.exe	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\SCAN_Wells Fargo bank payment.exe
"C:\Users\Admin\AppData\Local\Temp\SCAN_Wells Fargo bank payment.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:684

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\DudhvdcY" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2C3E.tmp"
2⤵
- Creates scheduled task(s)
PID:688

C:\Users\Admin\AppData\Local\Temp\SCAN_Wells Fargo bank payment.exe
"C:\Users\Admin\AppData\Local\Temp\SCAN_Wells Fargo bank payment.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:1108

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1108 -s 620
3⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:568

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Credentials in Files

2

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp2C3E.tmp
MD5
06549badd3eefecb54635148c81609fd

SHA1
df23161251cfb60ec431e4a7e6b70b4e65843963

SHA256
f436f7ba82403eed5dd30bff8990cec302a139778359882da726c0fa9b2642a0

SHA512
258059f7b37d5647f23c7ef04cf79ff369deda48e8a5c08e77a73f5456507d45e4f121d5306c8f92dce631ded1f993451ce4aaae8a5c94b4ee840e132da84a49

Download Submit
memory/568-73-0x0000000000390000-0x0000000000391000-memory.dmp

Filesize
4KB

Download
memory/568-72-0x0000000000000000-mapping.dmp

Download
memory/684-64-0x0000000007F70000-0x0000000007FE3000-memory.dmp

Filesize
460KB

Download
memory/684-65-0x0000000000DE0000-0x0000000000E18000-memory.dmp

Filesize
224KB

Download
memory/684-60-0x0000000001110000-0x0000000001111000-memory.dmp

Filesize
4KB

Download
memory/684-63-0x00000000003D0000-0x00000000003EB000-memory.dmp

Filesize
108KB

Download
memory/684-62-0x0000000001030000-0x0000000001031000-memory.dmp

Filesize
4KB

Download
memory/688-66-0x0000000000000000-mapping.dmp

Download
memory/1108-69-0x000000000040717B-mapping.dmp

Download
memory/1108-68-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1108-70-0x0000000075C71000-0x0000000075C73000-memory.dmp

Filesize
8KB

Download
memory/1108-71-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads