oski | 56e6f4171172dff458498dea319ababfc8648a31c78df18b1c23d5189d059a8d

Analysis

max time kernel
127s
max time network
128s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
08-03-2023 04:16

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General

Target

bda7463e881f4e14faadc83828e4fd6f.exe
Size

200KB
MD5

bda7463e881f4e14faadc83828e4fd6f
SHA1

4518f0f4b69f2af95d373d09f35bac1f800a7bdf
SHA256

56e6f4171172dff458498dea319ababfc8648a31c78df18b1c23d5189d059a8d
SHA512

cb9838b7395c1f849fc6fe0f0f916d0cf105a93431d9d16fec8f8cf0ec0a05a7ec7c72fb3bc9af5ba4a2aeaaa1dda5f973cce2501094be007feae883ee8c7428
SSDEEP

3072:WfUomEuYm98dlSq7gt5q7Dx+XgS6aCEwhOfUbCalNT2pbB3fI21Xi6FLPo3c:WfUauY68uSWCx+XA7mg2pN71Ljo3c

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

Deletes itself 1 IoCs

pid	Process
1852	cmd.exe

Loads dropped DLL 3 IoCs

pid	Process
1192	bda7463e881f4e14faadc83828e4fd6f.exe
1192	bda7463e881f4e14faadc83828e4fd6f.exe
1192	bda7463e881f4e14faadc83828e4fd6f.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	bda7463e881f4e14faadc83828e4fd6f.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2012	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2012	taskkill.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1192 wrote to memory of 1852	1192	bda7463e881f4e14faadc83828e4fd6f.exe	30
PID 1192 wrote to memory of 1852	1192	bda7463e881f4e14faadc83828e4fd6f.exe	30
PID 1192 wrote to memory of 1852	1192	bda7463e881f4e14faadc83828e4fd6f.exe	30
PID 1192 wrote to memory of 1852	1192	bda7463e881f4e14faadc83828e4fd6f.exe	30
PID 1852 wrote to memory of 2012	1852	cmd.exe	32
PID 1852 wrote to memory of 2012	1852	cmd.exe	32
PID 1852 wrote to memory of 2012	1852	cmd.exe	32
PID 1852 wrote to memory of 2012	1852	cmd.exe	32

C:\Users\Admin\AppData\Local\Temp\bda7463e881f4e14faadc83828e4fd6f.exe
"C:\Users\Admin\AppData\Local\Temp\bda7463e881f4e14faadc83828e4fd6f.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:1192
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /pid 1192 & erase C:\Users\Admin\AppData\Local\Temp\bda7463e881f4e14faadc83828e4fd6f.exe & RD /S /Q C:\\ProgramData\\204107134474665\\* & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1852
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /pid 1192
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2012

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

Download Submit
\ProgramData\sqlite3.dll

Filesize
630KB

MD5
e477a96c8f2b18d6b5c27bde49c990bf

SHA1
e980c9bf41330d1e5bd04556db4646a0210f7409

SHA256
16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660

SHA512
335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

Download Submit
memory/1192-66-0x0000000060900000-0x0000000060992000-memory.dmp

Filesize
584KB

Download
memory/1192-69-0x0000000060900000-0x0000000060992000-memory.dmp

Filesize
584KB

Download
memory/1192-72-0x0000000060900000-0x0000000060992000-memory.dmp

Filesize
584KB

Download
memory/1192-79-0x0000000060900000-0x0000000060992000-memory.dmp

Filesize
584KB

Download