oski | 9db1dcab3007e75a3c78dc1ba8bf91fd7e7daaa4cf3980ac1fd39f5beb7780ad

General

Target

3fab82becf1fb796a56853a4bb6d41cf.exe
Size

417KB
MD5

3fab82becf1fb796a56853a4bb6d41cf
SHA1

4662f8a3fff9a854690ebe86067ee9cd3f633015
SHA256

9db1dcab3007e75a3c78dc1ba8bf91fd7e7daaa4cf3980ac1fd39f5beb7780ad
SHA512

e97e9ea9d44c521bf2ef315eb51a5e25e8266ef0f0964693c26583e1a42aff27549cac61805ee84ab0b2697c739efbe08745c5f724209fc8d599697939fa7f14

Score

10^/10

oski discovery infostealer spyware stealer

Malware Config

Extracted

Family

oski

C2

mark02.xyz

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski
Downloads MZ/PE file

Loads dropped DLL 4 IoCs

Processes:

3fab82becf1fb796a56853a4bb6d41cf.exe3fab82becf1fb796a56853a4bb6d41cf.exe

pid	process
4192	3fab82becf1fb796a56853a4bb6d41cf.exe
4400	3fab82becf1fb796a56853a4bb6d41cf.exe
4400	3fab82becf1fb796a56853a4bb6d41cf.exe
4400	3fab82becf1fb796a56853a4bb6d41cf.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
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:

3fab82becf1fb796a56853a4bb6d41cf.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	3fab82becf1fb796a56853a4bb6d41cf.exe

Kills process with taskkill 1 IoCs
evasion

Processes:

taskkill.exe

pid process

4648 taskkill.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

taskkill.exe

description pid process

Token: SeDebugPrivilege 4648 taskkill.exe

pid	process
4648	taskkill.exe

description	pid	process
Token: SeDebugPrivilege	4648	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

3fab82becf1fb796a56853a4bb6d41cf.exe3fab82becf1fb796a56853a4bb6d41cf.execmd.exe

C:\Users\Admin\AppData\Local\Temp\3fab82becf1fb796a56853a4bb6d41cf.exe
"C:\Users\Admin\AppData\Local\Temp\3fab82becf1fb796a56853a4bb6d41cf.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:4192

C:\Users\Admin\AppData\Local\Temp\3fab82becf1fb796a56853a4bb6d41cf.exe
"C:\Users\Admin\AppData\Local\Temp\3fab82becf1fb796a56853a4bb6d41cf.exe"
2⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:4400

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c taskkill /pid 4400 & erase C:\Users\Admin\AppData\Local\Temp\3fab82becf1fb796a56853a4bb6d41cf.exe & RD /S /Q C:\\ProgramData\\066650970967017\\* & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:4608

C:\Windows\SysWOW64\taskkill.exe
taskkill /pid 4400
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4648

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

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

\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
\Users\Admin\AppData\Local\Temp\nsqF965.tmp\hojxfiwbq.dll
MD5
35948dd04254b7bbc9fc4b32d44e4d22

SHA1
419d3f217e54c923e46270090e15631f4d641b18

SHA256
7184510a0fb80d66a3aa3ef1c875cec900fe4f132a5d2ec10d614b29493178a2

SHA512
2904e4168e471a30899fc7ddc65e284fb7e1b626c9ccaa108b449cfb89ed57ac40e62c087d56cd861abb0e27b81af7e943af2cab1a47fd52a26c7fb8404865de

Download Submit
memory/4400-117-0x0000000000460000-0x0000000000498000-memory.dmp

Filesize
224KB

Download
memory/4400-116-0x0000000000000000-mapping.dmp

Download
memory/4400-120-0x0000000000460000-0x0000000000498000-memory.dmp

Filesize
224KB

Download
memory/4608-124-0x0000000000000000-mapping.dmp

Download
memory/4648-125-0x0000000000000000-mapping.dmp

Download

description	pid	process	target process
PID 4192 wrote to memory of 4400	4192	3fab82becf1fb796a56853a4bb6d41cf.exe	3fab82becf1fb796a56853a4bb6d41cf.exe
PID 4192 wrote to memory of 4400	4192	3fab82becf1fb796a56853a4bb6d41cf.exe	3fab82becf1fb796a56853a4bb6d41cf.exe
PID 4192 wrote to memory of 4400	4192	3fab82becf1fb796a56853a4bb6d41cf.exe	3fab82becf1fb796a56853a4bb6d41cf.exe
PID 4192 wrote to memory of 4400	4192	3fab82becf1fb796a56853a4bb6d41cf.exe	3fab82becf1fb796a56853a4bb6d41cf.exe
PID 4192 wrote to memory of 4400	4192	3fab82becf1fb796a56853a4bb6d41cf.exe	3fab82becf1fb796a56853a4bb6d41cf.exe
PID 4192 wrote to memory of 4400	4192	3fab82becf1fb796a56853a4bb6d41cf.exe	3fab82becf1fb796a56853a4bb6d41cf.exe
PID 4192 wrote to memory of 4400	4192	3fab82becf1fb796a56853a4bb6d41cf.exe	3fab82becf1fb796a56853a4bb6d41cf.exe
PID 4192 wrote to memory of 4400	4192	3fab82becf1fb796a56853a4bb6d41cf.exe	3fab82becf1fb796a56853a4bb6d41cf.exe
PID 4192 wrote to memory of 4400	4192	3fab82becf1fb796a56853a4bb6d41cf.exe	3fab82becf1fb796a56853a4bb6d41cf.exe
PID 4400 wrote to memory of 4608	4400	3fab82becf1fb796a56853a4bb6d41cf.exe	cmd.exe
PID 4400 wrote to memory of 4608	4400	3fab82becf1fb796a56853a4bb6d41cf.exe	cmd.exe
PID 4400 wrote to memory of 4608	4400	3fab82becf1fb796a56853a4bb6d41cf.exe	cmd.exe
PID 4608 wrote to memory of 4648	4608	cmd.exe	taskkill.exe
PID 4608 wrote to memory of 4648	4608	cmd.exe	taskkill.exe
PID 4608 wrote to memory of 4648	4608	cmd.exe	taskkill.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads