oski | e447edf7c703f03c3644f4d8b896974b7bfa59e7bc4036af5a800c7135dd09b0

General

Target

e4833e975ec9a404fe636e8cece99172.exe
Size

679KB
MD5

e4833e975ec9a404fe636e8cece99172
SHA1

553c0807cc5b0df4b1a91ff2689636fde8f33d70
SHA256

e447edf7c703f03c3644f4d8b896974b7bfa59e7bc4036af5a800c7135dd09b0
SHA512

308a288f131e56765044136aa0230103095bb7ce192743027dd4274f436c62ba8ede8d2fd21d60437f5c45cff520dfad9fbed40ed47573e95b82f002c480d472

Score

10^/10

oski discovery infostealer spyware stealer suricata

Malware Config

Extracted

Family

oski

C2

swsaseguranca.com.br

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:

e4833e975ec9a404fe636e8cece99172.exe

pid process

1148 e4833e975ec9a404fe636e8cece99172.exe
1148 e4833e975ec9a404fe636e8cece99172.exe
1148 e4833e975ec9a404fe636e8cece99172.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
Suspicious use of SetThreadContext 1 IoCs

Processes:

e4833e975ec9a404fe636e8cece99172.exe

description pid process target process

PID 2220 set thread context of 1148 2220 e4833e975ec9a404fe636e8cece99172.exe e4833e975ec9a404fe636e8cece99172.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

pid	process
1148	e4833e975ec9a404fe636e8cece99172.exe
1148	e4833e975ec9a404fe636e8cece99172.exe
1148	e4833e975ec9a404fe636e8cece99172.exe

description	pid	process	target process
PID 2220 set thread context of 1148	2220	e4833e975ec9a404fe636e8cece99172.exe	e4833e975ec9a404fe636e8cece99172.exe

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:

e4833e975ec9a404fe636e8cece99172.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	e4833e975ec9a404fe636e8cece99172.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

720 schtasks.exe
Kills process with taskkill 1 IoCs
evasion

Processes:

taskkill.exe

pid process

2364 taskkill.exe

pid	process
720	schtasks.exe

pid	process
2364	taskkill.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

e4833e975ec9a404fe636e8cece99172.exepowershell.exepowershell.exe

pid	process
2220	e4833e975ec9a404fe636e8cece99172.exe
2220	e4833e975ec9a404fe636e8cece99172.exe
2220	e4833e975ec9a404fe636e8cece99172.exe
2220	e4833e975ec9a404fe636e8cece99172.exe
2852	powershell.exe
1192	powershell.exe
2852	powershell.exe
1192	powershell.exe
2852	powershell.exe
1192	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

e4833e975ec9a404fe636e8cece99172.exepowershell.exepowershell.exetaskkill.exe

description	pid	process
Token: SeDebugPrivilege	2220	e4833e975ec9a404fe636e8cece99172.exe
Token: SeDebugPrivilege	1192	powershell.exe
Token: SeDebugPrivilege	2852	powershell.exe
Token: SeDebugPrivilege	2364	taskkill.exe

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

e4833e975ec9a404fe636e8cece99172.exee4833e975ec9a404fe636e8cece99172.execmd.exe

description	pid	process	target process
PID 2220 wrote to memory of 2852	2220	e4833e975ec9a404fe636e8cece99172.exe	powershell.exe
PID 2220 wrote to memory of 2852	2220	e4833e975ec9a404fe636e8cece99172.exe	powershell.exe
PID 2220 wrote to memory of 2852	2220	e4833e975ec9a404fe636e8cece99172.exe	powershell.exe
PID 2220 wrote to memory of 1192	2220	e4833e975ec9a404fe636e8cece99172.exe	powershell.exe
PID 2220 wrote to memory of 1192	2220	e4833e975ec9a404fe636e8cece99172.exe	powershell.exe
PID 2220 wrote to memory of 1192	2220	e4833e975ec9a404fe636e8cece99172.exe	powershell.exe
PID 2220 wrote to memory of 720	2220	e4833e975ec9a404fe636e8cece99172.exe	schtasks.exe
PID 2220 wrote to memory of 720	2220	e4833e975ec9a404fe636e8cece99172.exe	schtasks.exe
PID 2220 wrote to memory of 720	2220	e4833e975ec9a404fe636e8cece99172.exe	schtasks.exe
PID 2220 wrote to memory of 1172	2220	e4833e975ec9a404fe636e8cece99172.exe	e4833e975ec9a404fe636e8cece99172.exe
PID 2220 wrote to memory of 1172	2220	e4833e975ec9a404fe636e8cece99172.exe	e4833e975ec9a404fe636e8cece99172.exe
PID 2220 wrote to memory of 1172	2220	e4833e975ec9a404fe636e8cece99172.exe	e4833e975ec9a404fe636e8cece99172.exe
PID 2220 wrote to memory of 1148	2220	e4833e975ec9a404fe636e8cece99172.exe	e4833e975ec9a404fe636e8cece99172.exe
PID 2220 wrote to memory of 1148	2220	e4833e975ec9a404fe636e8cece99172.exe	e4833e975ec9a404fe636e8cece99172.exe
PID 2220 wrote to memory of 1148	2220	e4833e975ec9a404fe636e8cece99172.exe	e4833e975ec9a404fe636e8cece99172.exe
PID 2220 wrote to memory of 1148	2220	e4833e975ec9a404fe636e8cece99172.exe	e4833e975ec9a404fe636e8cece99172.exe
PID 2220 wrote to memory of 1148	2220	e4833e975ec9a404fe636e8cece99172.exe	e4833e975ec9a404fe636e8cece99172.exe
PID 2220 wrote to memory of 1148	2220	e4833e975ec9a404fe636e8cece99172.exe	e4833e975ec9a404fe636e8cece99172.exe
PID 2220 wrote to memory of 1148	2220	e4833e975ec9a404fe636e8cece99172.exe	e4833e975ec9a404fe636e8cece99172.exe
PID 2220 wrote to memory of 1148	2220	e4833e975ec9a404fe636e8cece99172.exe	e4833e975ec9a404fe636e8cece99172.exe
PID 2220 wrote to memory of 1148	2220	e4833e975ec9a404fe636e8cece99172.exe	e4833e975ec9a404fe636e8cece99172.exe
PID 1148 wrote to memory of 424	1148	e4833e975ec9a404fe636e8cece99172.exe	cmd.exe
PID 1148 wrote to memory of 424	1148	e4833e975ec9a404fe636e8cece99172.exe	cmd.exe
PID 1148 wrote to memory of 424	1148	e4833e975ec9a404fe636e8cece99172.exe	cmd.exe
PID 424 wrote to memory of 2364	424	cmd.exe	taskkill.exe
PID 424 wrote to memory of 2364	424	cmd.exe	taskkill.exe
PID 424 wrote to memory of 2364	424	cmd.exe	taskkill.exe

C:\Users\Admin\AppData\Local\Temp\e4833e975ec9a404fe636e8cece99172.exe
"C:\Users\Admin\AppData\Local\Temp\e4833e975ec9a404fe636e8cece99172.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2220

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\e4833e975ec9a404fe636e8cece99172.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2852

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\oYQmxbAzWBbFl.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1192

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\oYQmxbAzWBbFl" /XML "C:\Users\Admin\AppData\Local\Temp\tmpECCD.tmp"
2⤵
- Creates scheduled task(s)
PID:720

C:\Users\Admin\AppData\Local\Temp\e4833e975ec9a404fe636e8cece99172.exe
"C:\Users\Admin\AppData\Local\Temp\e4833e975ec9a404fe636e8cece99172.exe"
2⤵
PID:1172

C:\Users\Admin\AppData\Local\Temp\e4833e975ec9a404fe636e8cece99172.exe
"C:\Users\Admin\AppData\Local\Temp\e4833e975ec9a404fe636e8cece99172.exe"
2⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:1148

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c taskkill /pid 1148 & erase C:\Users\Admin\AppData\Local\Temp\e4833e975ec9a404fe636e8cece99172.exe & RD /S /Q C:\\ProgramData\\060334327552175\\* & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:424

C:\Windows\SysWOW64\taskkill.exe
taskkill /pid 1148
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:2364

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

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

C:\Users\Admin\AppData\Local\Temp\tmpECCD.tmp
MD5
ca46d23a7646deed434390260dabc496

SHA1
8d44838cc50a1f50d821ff44a56e7df08b98df49

SHA256
344df50430730df8b69e5293a2fac0cf69a180c48f3f5a40713dbc7c0e243a78

SHA512
70aa7b4ba70caca24e83bdc713ede6ec0184d7ae5c8da9f4f6a0455170669c03448c72a60af7e00de37f3c6d24134ef009ff46a4d8762a39213de9336a5ca927

Download Submit
\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/424-259-0x0000000000000000-mapping.dmp

Download
memory/720-130-0x0000000000000000-mapping.dmp

Download
memory/1148-149-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1148-137-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1148-138-0x000000000040717B-mapping.dmp

Download
memory/1192-174-0x00000000089F0000-0x0000000008A23000-memory.dmp

Filesize
204KB

Download
memory/1192-132-0x0000000000990000-0x0000000000991000-memory.dmp

Filesize
4KB

Download
memory/1192-156-0x0000000007C90000-0x0000000007C91000-memory.dmp

Filesize
4KB

Download
memory/1192-128-0x0000000000000000-mapping.dmp

Download
memory/1192-203-0x0000000006663000-0x0000000006664000-memory.dmp

Filesize
4KB

Download
memory/1192-154-0x00000000079A0000-0x00000000079A1000-memory.dmp

Filesize
4KB

Download
memory/1192-150-0x0000000007590000-0x0000000007591000-memory.dmp

Filesize
4KB

Download
memory/1192-142-0x00000000072D0000-0x00000000072D1000-memory.dmp

Filesize
4KB

Download
memory/1192-133-0x0000000000990000-0x0000000000991000-memory.dmp

Filesize
4KB

Download
memory/1192-146-0x0000000006660000-0x0000000006661000-memory.dmp

Filesize
4KB

Download
memory/1192-148-0x0000000006662000-0x0000000006663000-memory.dmp

Filesize
4KB

Download
memory/1192-145-0x0000000007520000-0x0000000007521000-memory.dmp

Filesize
4KB

Download
memory/1192-159-0x0000000000990000-0x0000000000991000-memory.dmp

Filesize
4KB

Download
memory/1192-179-0x000000007F310000-0x000000007F311000-memory.dmp

Filesize
4KB

Download
memory/2220-123-0x0000000006110000-0x0000000006111000-memory.dmp

Filesize
4KB

Download
memory/2220-119-0x0000000005280000-0x0000000005312000-memory.dmp

Filesize
584KB

Download
memory/2220-120-0x0000000005340000-0x0000000005341000-memory.dmp

Filesize
4KB

Download
memory/2220-121-0x00000000056E0000-0x00000000056E8000-memory.dmp

Filesize
32KB

Download
memory/2220-122-0x0000000005DA0000-0x0000000005DA1000-memory.dmp

Filesize
4KB

Download
memory/2220-118-0x00000000053A0000-0x00000000053A1000-memory.dmp

Filesize
4KB

Download
memory/2220-117-0x00000000058A0000-0x00000000058A1000-memory.dmp

Filesize
4KB

Download
memory/2220-124-0x0000000006250000-0x00000000062E3000-memory.dmp

Filesize
588KB

Download
memory/2220-115-0x0000000000910000-0x0000000000911000-memory.dmp

Filesize
4KB

Download
memory/2364-280-0x0000000000000000-mapping.dmp

Download
memory/2852-127-0x00000000033B0000-0x00000000033B1000-memory.dmp

Filesize
4KB

Download
memory/2852-158-0x00000000033B0000-0x00000000033B1000-memory.dmp

Filesize
4KB

Download
memory/2852-152-0x0000000008070000-0x0000000008071000-memory.dmp

Filesize
4KB

Download
memory/2852-144-0x0000000004CC2000-0x0000000004CC3000-memory.dmp

Filesize
4KB

Download
memory/2852-175-0x000000007E980000-0x000000007E981000-memory.dmp

Filesize
4KB

Download
memory/2852-173-0x00000000097A0000-0x00000000097D3000-memory.dmp

Filesize
204KB

Download
memory/2852-141-0x0000000004CC0000-0x0000000004CC1000-memory.dmp

Filesize
4KB

Download
memory/2852-139-0x0000000007D60000-0x0000000007D61000-memory.dmp

Filesize
4KB

Download
memory/2852-131-0x0000000007700000-0x0000000007701000-memory.dmp

Filesize
4KB

Download
memory/2852-191-0x0000000009560000-0x0000000009561000-memory.dmp

Filesize
4KB

Download
memory/2852-204-0x0000000004CC3000-0x0000000004CC4000-memory.dmp

Filesize
4KB

Download
memory/2852-129-0x0000000007090000-0x0000000007091000-memory.dmp

Filesize
4KB

Download
memory/2852-126-0x00000000033B0000-0x00000000033B1000-memory.dmp

Filesize
4KB

Download
memory/2852-125-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads