oski | 6b869d8825516d0b977d48043d1d56d233de7b128074b068566dc33e0ff9fdb7

General

Target

dd6f97becdd24e1c2c1b7662bb3760aa.exe
Size

745KB
MD5

dd6f97becdd24e1c2c1b7662bb3760aa
SHA1

a2894d09e5fc6f0a5ee5ec27119b02ecbc2d9a79
SHA256

6b869d8825516d0b977d48043d1d56d233de7b128074b068566dc33e0ff9fdb7
SHA512

f352c4cfc3d878287e0f6a783ab803eccba5aee872321e18f2c6c15bca9aad6a47c441e52cb03b88f77cc853ee33988198703cdfbbc0bff0097163125c7e3cda

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:

dd6f97becdd24e1c2c1b7662bb3760aa.exe

pid process

888 dd6f97becdd24e1c2c1b7662bb3760aa.exe
888 dd6f97becdd24e1c2c1b7662bb3760aa.exe
888 dd6f97becdd24e1c2c1b7662bb3760aa.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:

dd6f97becdd24e1c2c1b7662bb3760aa.exe

description pid process target process

PID 3152 set thread context of 888 3152 dd6f97becdd24e1c2c1b7662bb3760aa.exe dd6f97becdd24e1c2c1b7662bb3760aa.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
888	dd6f97becdd24e1c2c1b7662bb3760aa.exe
888	dd6f97becdd24e1c2c1b7662bb3760aa.exe
888	dd6f97becdd24e1c2c1b7662bb3760aa.exe

description	pid	process	target process
PID 3152 set thread context of 888	3152	dd6f97becdd24e1c2c1b7662bb3760aa.exe	dd6f97becdd24e1c2c1b7662bb3760aa.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:

dd6f97becdd24e1c2c1b7662bb3760aa.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dd6f97becdd24e1c2c1b7662bb3760aa.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

648 schtasks.exe
Kills process with taskkill 1 IoCs
evasion

Processes:

taskkill.exe

pid process

2660 taskkill.exe

pid	process
648	schtasks.exe

pid	process
2660	taskkill.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

dd6f97becdd24e1c2c1b7662bb3760aa.exepowershell.exepowershell.exe

pid	process
3152	dd6f97becdd24e1c2c1b7662bb3760aa.exe
3152	dd6f97becdd24e1c2c1b7662bb3760aa.exe
3152	dd6f97becdd24e1c2c1b7662bb3760aa.exe
1056	powershell.exe
3964	powershell.exe
1056	powershell.exe
3964	powershell.exe
3964	powershell.exe
1056	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

dd6f97becdd24e1c2c1b7662bb3760aa.exepowershell.exepowershell.exetaskkill.exe

description	pid	process
Token: SeDebugPrivilege	3152	dd6f97becdd24e1c2c1b7662bb3760aa.exe
Token: SeDebugPrivilege	1056	powershell.exe
Token: SeDebugPrivilege	3964	powershell.exe
Token: SeDebugPrivilege	2660	taskkill.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

dd6f97becdd24e1c2c1b7662bb3760aa.exedd6f97becdd24e1c2c1b7662bb3760aa.execmd.exe

description	pid	process	target process
PID 3152 wrote to memory of 3964	3152	dd6f97becdd24e1c2c1b7662bb3760aa.exe	powershell.exe
PID 3152 wrote to memory of 3964	3152	dd6f97becdd24e1c2c1b7662bb3760aa.exe	powershell.exe
PID 3152 wrote to memory of 3964	3152	dd6f97becdd24e1c2c1b7662bb3760aa.exe	powershell.exe
PID 3152 wrote to memory of 1056	3152	dd6f97becdd24e1c2c1b7662bb3760aa.exe	powershell.exe
PID 3152 wrote to memory of 1056	3152	dd6f97becdd24e1c2c1b7662bb3760aa.exe	powershell.exe
PID 3152 wrote to memory of 1056	3152	dd6f97becdd24e1c2c1b7662bb3760aa.exe	powershell.exe
PID 3152 wrote to memory of 648	3152	dd6f97becdd24e1c2c1b7662bb3760aa.exe	schtasks.exe
PID 3152 wrote to memory of 648	3152	dd6f97becdd24e1c2c1b7662bb3760aa.exe	schtasks.exe
PID 3152 wrote to memory of 648	3152	dd6f97becdd24e1c2c1b7662bb3760aa.exe	schtasks.exe
PID 3152 wrote to memory of 888	3152	dd6f97becdd24e1c2c1b7662bb3760aa.exe	dd6f97becdd24e1c2c1b7662bb3760aa.exe
PID 3152 wrote to memory of 888	3152	dd6f97becdd24e1c2c1b7662bb3760aa.exe	dd6f97becdd24e1c2c1b7662bb3760aa.exe
PID 3152 wrote to memory of 888	3152	dd6f97becdd24e1c2c1b7662bb3760aa.exe	dd6f97becdd24e1c2c1b7662bb3760aa.exe
PID 3152 wrote to memory of 888	3152	dd6f97becdd24e1c2c1b7662bb3760aa.exe	dd6f97becdd24e1c2c1b7662bb3760aa.exe
PID 3152 wrote to memory of 888	3152	dd6f97becdd24e1c2c1b7662bb3760aa.exe	dd6f97becdd24e1c2c1b7662bb3760aa.exe
PID 3152 wrote to memory of 888	3152	dd6f97becdd24e1c2c1b7662bb3760aa.exe	dd6f97becdd24e1c2c1b7662bb3760aa.exe
PID 3152 wrote to memory of 888	3152	dd6f97becdd24e1c2c1b7662bb3760aa.exe	dd6f97becdd24e1c2c1b7662bb3760aa.exe
PID 3152 wrote to memory of 888	3152	dd6f97becdd24e1c2c1b7662bb3760aa.exe	dd6f97becdd24e1c2c1b7662bb3760aa.exe
PID 3152 wrote to memory of 888	3152	dd6f97becdd24e1c2c1b7662bb3760aa.exe	dd6f97becdd24e1c2c1b7662bb3760aa.exe
PID 888 wrote to memory of 4040	888	dd6f97becdd24e1c2c1b7662bb3760aa.exe	cmd.exe
PID 888 wrote to memory of 4040	888	dd6f97becdd24e1c2c1b7662bb3760aa.exe	cmd.exe
PID 888 wrote to memory of 4040	888	dd6f97becdd24e1c2c1b7662bb3760aa.exe	cmd.exe
PID 4040 wrote to memory of 2660	4040	cmd.exe	taskkill.exe
PID 4040 wrote to memory of 2660	4040	cmd.exe	taskkill.exe
PID 4040 wrote to memory of 2660	4040	cmd.exe	taskkill.exe

C:\Users\Admin\AppData\Local\Temp\dd6f97becdd24e1c2c1b7662bb3760aa.exe
"C:\Users\Admin\AppData\Local\Temp\dd6f97becdd24e1c2c1b7662bb3760aa.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3152

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\dd6f97becdd24e1c2c1b7662bb3760aa.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3964

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\PssjBtDrVeeF.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1056

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\PssjBtDrVeeF" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD388.tmp"
2⤵
- Creates scheduled task(s)
PID:648

C:\Users\Admin\AppData\Local\Temp\dd6f97becdd24e1c2c1b7662bb3760aa.exe
"C:\Users\Admin\AppData\Local\Temp\dd6f97becdd24e1c2c1b7662bb3760aa.exe"
2⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:888

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c taskkill /pid 888 & erase C:\Users\Admin\AppData\Local\Temp\dd6f97becdd24e1c2c1b7662bb3760aa.exe & RD /S /Q C:\\ProgramData\\210843273835330\\* & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:4040

C:\Windows\SysWOW64\taskkill.exe
taskkill /pid 888
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:2660

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\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
MD5
1c19c16e21c97ed42d5beabc93391fc5

SHA1
8ad83f8e0b3acf8dfbbf87931e41f0d664c4df68

SHA256
1bcd97396c83babfe6c5068ba590d7a3f8b70e72955a9d1e4070648e404cbf05

SHA512
7d18776d8f649b3d29c182ff03efc6cea8b527542ee55304980f24577aae8b64e37044407776e220984346c3998ace5f8853afa58c8b38407482a728e9495e0c

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
MD5
45534a82c63e08347724089f9f9cc803

SHA1
826757e543a445e2b63f354bd00c5aa525429b5b

SHA256
635bd8d58d504de0f9e5027a495148b7022288e1d7c503354432c31ffe33af5d

SHA512
087dde88a17f93382d2e07de0741082fdbc2728403826836dc76d6098aab09bdded8aa118fa6ef3caeeff712b611c5991d4617c3ffeaadb12c4c074c5d013f55

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpD388.tmp
MD5
9fbadcb71a480073cef32d80b395d6e5

SHA1
1d58747b012148de4cc32b3cbb446f53f3943084

SHA256
640a4f270a8f67d81b8646bac263d84449751f72a09e7bd7c4d61ef0836d79bc

SHA512
2d4525befcaa83745f539c3827b881fc3c5c8e0346981cb3b90981987a91f1cbb688c71e5857caa3d36eacf984447c7c460bbe30e5e45b8800a6a59d2a43b63d

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/648-129-0x0000000000000000-mapping.dmp

Download
memory/888-142-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/888-140-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/888-141-0x000000000040717B-mapping.dmp

Download
memory/1056-127-0x0000000000000000-mapping.dmp

Download
memory/1056-143-0x0000000007450000-0x0000000007451000-memory.dmp

Filesize
4KB

Download
memory/1056-153-0x0000000007F60000-0x0000000007F61000-memory.dmp

Filesize
4KB

Download
memory/1056-159-0x0000000004290000-0x0000000004291000-memory.dmp

Filesize
4KB

Download
memory/1056-130-0x0000000004290000-0x0000000004291000-memory.dmp

Filesize
4KB

Download
memory/1056-131-0x0000000004290000-0x0000000004291000-memory.dmp

Filesize
4KB

Download
memory/1056-155-0x0000000007EC0000-0x0000000007EC1000-memory.dmp

Filesize
4KB

Download
memory/1056-221-0x0000000004453000-0x0000000004454000-memory.dmp

Filesize
4KB

Download
memory/1056-201-0x000000007FB30000-0x000000007FB31000-memory.dmp

Filesize
4KB

Download
memory/1056-137-0x0000000004450000-0x0000000004451000-memory.dmp

Filesize
4KB

Download
memory/1056-138-0x0000000004452000-0x0000000004453000-memory.dmp

Filesize
4KB

Download
memory/1056-175-0x0000000008C80000-0x0000000008CB3000-memory.dmp

Filesize
204KB

Download
memory/2660-249-0x0000000000000000-mapping.dmp

Download
memory/3152-123-0x000000000B430000-0x000000000B4BA000-memory.dmp

Filesize
552KB

Download
memory/3152-122-0x000000000B200000-0x000000000B201000-memory.dmp

Filesize
4KB

Download
memory/3152-119-0x0000000007860000-0x0000000007D5E000-memory.dmp

Filesize
5.0MB

Download
memory/3152-120-0x0000000007AB0000-0x0000000007AB1000-memory.dmp

Filesize
4KB

Download
memory/3152-121-0x0000000007BD0000-0x0000000007BD6000-memory.dmp

Filesize
24KB

Download
memory/3152-118-0x0000000007940000-0x0000000007941000-memory.dmp

Filesize
4KB

Download
memory/3152-115-0x0000000000A30000-0x0000000000A31000-memory.dmp

Filesize
4KB

Download
memory/3152-117-0x0000000007D60000-0x0000000007D61000-memory.dmp

Filesize
4KB

Download
memory/3964-151-0x0000000006D10000-0x0000000006D11000-memory.dmp

Filesize
4KB

Download
memory/3964-188-0x00000000089B0000-0x00000000089B1000-memory.dmp

Filesize
4KB

Download
memory/3964-149-0x00000000074D0000-0x00000000074D1000-memory.dmp

Filesize
4KB

Download
memory/3964-147-0x0000000006C10000-0x0000000006C11000-memory.dmp

Filesize
4KB

Download
memory/3964-145-0x0000000007460000-0x0000000007461000-memory.dmp

Filesize
4KB

Download
memory/3964-124-0x0000000000000000-mapping.dmp

Download
memory/3964-125-0x0000000002830000-0x0000000002831000-memory.dmp

Filesize
4KB

Download
memory/3964-157-0x0000000002830000-0x0000000002831000-memory.dmp

Filesize
4KB

Download
memory/3964-200-0x000000007EAA0000-0x000000007EAA1000-memory.dmp

Filesize
4KB

Download
memory/3964-135-0x00000000066F0000-0x00000000066F1000-memory.dmp

Filesize
4KB

Download
memory/3964-128-0x0000000004100000-0x0000000004101000-memory.dmp

Filesize
4KB

Download
memory/3964-136-0x00000000066F2000-0x00000000066F3000-memory.dmp

Filesize
4KB

Download
memory/3964-223-0x00000000066F3000-0x00000000066F4000-memory.dmp

Filesize
4KB

Download
memory/3964-133-0x0000000006D30000-0x0000000006D31000-memory.dmp

Filesize
4KB

Download
memory/3964-126-0x0000000002830000-0x0000000002831000-memory.dmp

Filesize
4KB

Download
memory/4040-208-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads