oski | 7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6

General

Target

7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe
Size

484KB
MD5

7f7b84c7d34ea8de67d0956b66780503
SHA1

736a7ed8d67c114e20a7da68ec4eb3223397783d
SHA256

7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6
SHA512

a85df8603af7cb9768548ea7deeeb56d66e765df8541ff8b19bdc4e84315567b7fa8125672ee4ebb3496f77bfd7447608745eb8f85176663918775793b3e8463

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:

7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe

pid	process
1592	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe
1592	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe
1592	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.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:

7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe

description	pid	process	target process
PID 3036 set thread context of 1592	3036	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe

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:

7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.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

1408 schtasks.exe
Kills process with taskkill 1 IoCs
evasion

Processes:

taskkill.exe

pid process

836 taskkill.exe

pid	process
1408	schtasks.exe

pid	process
836	taskkill.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exepowershell.exepowershell.exe

pid	process
3036	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe
3036	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe
800	powershell.exe
432	powershell.exe
800	powershell.exe
432	powershell.exe
432	powershell.exe
800	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exepowershell.exepowershell.exetaskkill.exe

description	pid	process
Token: SeDebugPrivilege	3036	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe
Token: SeDebugPrivilege	432	powershell.exe
Token: SeDebugPrivilege	800	powershell.exe
Token: SeDebugPrivilege	836	taskkill.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.execmd.exe

description	pid	process	target process
PID 3036 wrote to memory of 800	3036	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe	powershell.exe
PID 3036 wrote to memory of 800	3036	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe	powershell.exe
PID 3036 wrote to memory of 800	3036	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe	powershell.exe
PID 3036 wrote to memory of 432	3036	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe	powershell.exe
PID 3036 wrote to memory of 432	3036	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe	powershell.exe
PID 3036 wrote to memory of 432	3036	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe	powershell.exe
PID 3036 wrote to memory of 1408	3036	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe	schtasks.exe
PID 3036 wrote to memory of 1408	3036	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe	schtasks.exe
PID 3036 wrote to memory of 1408	3036	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe	schtasks.exe
PID 3036 wrote to memory of 1592	3036	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe
PID 3036 wrote to memory of 1592	3036	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe
PID 3036 wrote to memory of 1592	3036	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe
PID 3036 wrote to memory of 1592	3036	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe
PID 3036 wrote to memory of 1592	3036	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe
PID 3036 wrote to memory of 1592	3036	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe
PID 3036 wrote to memory of 1592	3036	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe
PID 3036 wrote to memory of 1592	3036	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe
PID 3036 wrote to memory of 1592	3036	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe
PID 1592 wrote to memory of 3632	1592	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe	cmd.exe
PID 1592 wrote to memory of 3632	1592	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe	cmd.exe
PID 1592 wrote to memory of 3632	1592	7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe	cmd.exe
PID 3632 wrote to memory of 836	3632	cmd.exe	taskkill.exe
PID 3632 wrote to memory of 836	3632	cmd.exe	taskkill.exe
PID 3632 wrote to memory of 836	3632	cmd.exe	taskkill.exe

C:\Users\Admin\AppData\Local\Temp\7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe
"C:\Users\Admin\AppData\Local\Temp\7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3036

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\7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:800

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\xwnmdsNrIl.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:432

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\xwnmdsNrIl" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2FA7.tmp"
2⤵
- Creates scheduled task(s)
PID:1408

C:\Users\Admin\AppData\Local\Temp\7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe
"C:\Users\Admin\AppData\Local\Temp\7d94781381eabcb7e55417601420ac97ec1b7df80417a1c792aa6135ac42f9b6.exe"
2⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:1592

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c taskkill /pid 1592 & erase C:\Users\Admin\AppData\Local\Temp\7d94781381eabcb7e55417601420ac97ec1b7df80417a1' & RD /S /Q C:\\ProgramData\\155700706714563\\* & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:3632

C:\Windows\SysWOW64\taskkill.exe
taskkill /pid 1592
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:836

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

Replay Monitor

Loading Replay Monitor...

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\Temp\tmp2FA7.tmp
MD5
044327b473255e3e737d36975625fd7c

SHA1
875b626585fd4e9b3fd1877dc707d4a82e33e414

SHA256
0dbbcee4a2bfa03c8cbad78631759b8a6c4d9ab82953c1ff31fec993b806b346

SHA512
28fd2a68ab60911cd303214356fa0f4a06fe43794ebd4538fd9f40a55d0e6f95fdcb974aea6849d2c974a55f7671e3bab291462f886855341e995ac812c4c928

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/432-201-0x000000007F3A0000-0x000000007F3A1000-memory.dmp

Filesize
4KB

Download
memory/432-135-0x00000000043F0000-0x00000000043F1000-memory.dmp

Filesize
4KB

Download
memory/432-163-0x00000000043F0000-0x00000000043F1000-memory.dmp

Filesize
4KB

Download
memory/432-159-0x0000000008020000-0x0000000008021000-memory.dmp

Filesize
4KB

Download
memory/432-157-0x0000000006832000-0x0000000006833000-memory.dmp

Filesize
4KB

Download
memory/432-129-0x0000000000000000-mapping.dmp

Download
memory/432-156-0x0000000006830000-0x0000000006831000-memory.dmp

Filesize
4KB

Download
memory/432-142-0x0000000006E50000-0x0000000006E51000-memory.dmp

Filesize
4KB

Download
memory/432-203-0x0000000006833000-0x0000000006834000-memory.dmp

Filesize
4KB

Download
memory/432-136-0x00000000043F0000-0x00000000043F1000-memory.dmp

Filesize
4KB

Download
memory/800-161-0x00000000008C0000-0x00000000008C1000-memory.dmp

Filesize
4KB

Download
memory/800-128-0x0000000000000000-mapping.dmp

Download
memory/800-133-0x0000000004350000-0x0000000004351000-memory.dmp

Filesize
4KB

Download
memory/800-132-0x00000000008C0000-0x00000000008C1000-memory.dmp

Filesize
4KB

Download
memory/800-204-0x00000000069D3000-0x00000000069D4000-memory.dmp

Filesize
4KB

Download
memory/800-202-0x000000007EAA0000-0x000000007EAA1000-memory.dmp

Filesize
4KB

Download
memory/800-131-0x00000000008C0000-0x00000000008C1000-memory.dmp

Filesize
4KB

Download
memory/800-144-0x0000000006E40000-0x0000000006E41000-memory.dmp

Filesize
4KB

Download
memory/800-146-0x0000000006EB0000-0x0000000006EB1000-memory.dmp

Filesize
4KB

Download
memory/800-148-0x0000000007640000-0x0000000007641000-memory.dmp

Filesize
4KB

Download
memory/800-150-0x0000000006FB0000-0x0000000006FB1000-memory.dmp

Filesize
4KB

Download
memory/800-154-0x00000000069D0000-0x00000000069D1000-memory.dmp

Filesize
4KB

Download
memory/800-155-0x00000000069D2000-0x00000000069D3000-memory.dmp

Filesize
4KB

Download
memory/800-152-0x0000000008040000-0x0000000008041000-memory.dmp

Filesize
4KB

Download
memory/800-189-0x0000000008BE0000-0x0000000008BE1000-memory.dmp

Filesize
4KB

Download
memory/800-134-0x0000000007010000-0x0000000007011000-memory.dmp

Filesize
4KB

Download
memory/800-176-0x0000000008C00000-0x0000000008C33000-memory.dmp

Filesize
204KB

Download
memory/836-421-0x0000000000000000-mapping.dmp

Download
memory/1408-130-0x0000000000000000-mapping.dmp

Download
memory/1592-141-0x000000000040717B-mapping.dmp

Download
memory/1592-158-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1592-140-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3036-126-0x00000000073E0000-0x00000000073E1000-memory.dmp

Filesize
4KB

Download
memory/3036-125-0x0000000007390000-0x0000000007391000-memory.dmp

Filesize
4KB

Download
memory/3036-127-0x0000000007270000-0x00000000072D4000-memory.dmp

Filesize
400KB

Download
memory/3036-124-0x0000000005340000-0x0000000005348000-memory.dmp

Filesize
32KB

Download
memory/3036-123-0x0000000004FB0000-0x00000000054AE000-memory.dmp

Filesize
5.0MB

Download
memory/3036-122-0x0000000004F50000-0x0000000004F51000-memory.dmp

Filesize
4KB

Download
memory/3036-121-0x0000000004FB0000-0x0000000004FB1000-memory.dmp

Filesize
4KB

Download
memory/3036-118-0x00000000006B0000-0x00000000006B1000-memory.dmp

Filesize
4KB

Download
memory/3036-120-0x00000000054B0000-0x00000000054B1000-memory.dmp

Filesize
4KB

Download
memory/3632-358-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads