oski | 2082e713282ab51284141b3dbd96f27bd7c27dec371c800f678916a1719bbb83

Analysis

max time kernel
40s
max time network
43s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
01-02-2023 06:07

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General

Target

2023-02-01_ddee3051b544961caf086b496a1335eb_mafia.exe
Size

200KB
MD5

ddee3051b544961caf086b496a1335eb
SHA1

94a0b05c3599648dfc7f4a0f89ce7fa0f923fd26
SHA256

2082e713282ab51284141b3dbd96f27bd7c27dec371c800f678916a1719bbb83
SHA512

019e8b6a3c662fe98e2d8bab6f47f007c56b1a1450dfd149a9383c93d96e448d6b8187d3700462f7a22a163a505777dcc314b144ccdb2d001b704ca4048d5afa
SSDEEP

3072:WfUomEuYm98dlSq7gt5q7Dx+XgS6aCEwhOfUbCalNT2pbB3fIM1Xi6FLPo3c:WfUauY68uSWCx+XA7mg2pNl1Ljo3c

Score

10^/10

oski discovery infostealer spyware stealer

Malware Config

Signatures

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

Loads dropped DLL 3 IoCs

pid	Process
1096	2023-02-01_ddee3051b544961caf086b496a1335eb_mafia.exe
1096	2023-02-01_ddee3051b544961caf086b496a1335eb_mafia.exe
1096	2023-02-01_ddee3051b544961caf086b496a1335eb_mafia.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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	2023-02-01_ddee3051b544961caf086b496a1335eb_mafia.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
544	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	544	taskkill.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1096 wrote to memory of 588	1096	2023-02-01_ddee3051b544961caf086b496a1335eb_mafia.exe	28
PID 1096 wrote to memory of 588	1096	2023-02-01_ddee3051b544961caf086b496a1335eb_mafia.exe	28
PID 1096 wrote to memory of 588	1096	2023-02-01_ddee3051b544961caf086b496a1335eb_mafia.exe	28
PID 1096 wrote to memory of 588	1096	2023-02-01_ddee3051b544961caf086b496a1335eb_mafia.exe	28
PID 588 wrote to memory of 544	588	cmd.exe	30
PID 588 wrote to memory of 544	588	cmd.exe	30
PID 588 wrote to memory of 544	588	cmd.exe	30
PID 588 wrote to memory of 544	588	cmd.exe	30

C:\Users\Admin\AppData\Local\Temp\2023-02-01_ddee3051b544961caf086b496a1335eb_mafia.exe
"C:\Users\Admin\AppData\Local\Temp\2023-02-01_ddee3051b544961caf086b496a1335eb_mafia.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:1096
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /pid 1096 & erase C:\Users\Admin\AppData\Local\Temp\2023-02-01_ddee3051b544961caf086b496a1335eb_ma' & RD /S /Q C:\\ProgramData\\116499319241154\\* & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:588
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /pid 1096
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:544

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\ProgramData\mozglue.dll

Filesize
133KB

MD5
8f73c08a9660691143661bf7332c3c27

SHA1
37fa65dd737c50fda710fdbde89e51374d0c204a

SHA256
3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

SHA512
0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

Download Submit
\ProgramData\nss3.dll

Filesize
1.2MB

MD5
bfac4e3c5908856ba17d41edcd455a51

SHA1
8eec7e888767aa9e4cca8ff246eb2aacb9170428

SHA256
e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

SHA512
2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

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\ProgramData\sqlite3.dll

Filesize
630KB

MD5
e477a96c8f2b18d6b5c27bde49c990bf

SHA1
e980c9bf41330d1e5bd04556db4646a0210f7409

SHA256
16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660

SHA512
335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

Download Submit
memory/1096-54-0x00000000768A1000-0x00000000768A3000-memory.dmp

Filesize
8KB

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