oski | 2e77a1b324229a10ce5ac15a916526eff4a1e44c291bb918d6ed5329bc56f81b

General

Target

8C36F8A010E9781BDA4076852EFB05A7.exe
Size

200KB
MD5

8c36f8a010e9781bda4076852efb05a7
SHA1

155d37c5d7cfda081a74080dc288a80c7ecdc643
SHA256

2e77a1b324229a10ce5ac15a916526eff4a1e44c291bb918d6ed5329bc56f81b
SHA512

5712cc4f13ab99173aae0708bf94961762625dbc78d8f77c54688c7acccd01b7117cd7f2a36120d3ae832b4f82582773b1cb00713481cd90e1944ffd6a2f8f8c
SSDEEP

3072:WfUomEuYm98dlSq7gt5q7Dx+XgS6aCEwhOfUbCalNT2pbB3fIr1Xi6FLPo3c:WfUauY68uSWCx+XA7mg2pNS1Ljo3c

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	8C36F8A010E9781BDA4076852EFB05A7.exe

Loads dropped DLL 3 IoCs

pid	Process
3516	8C36F8A010E9781BDA4076852EFB05A7.exe
3516	8C36F8A010E9781BDA4076852EFB05A7.exe
3516	8C36F8A010E9781BDA4076852EFB05A7.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
T1552.001
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001
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).

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	8C36F8A010E9781BDA4076852EFB05A7.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
3640	taskkill.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3640	taskkill.exe
Token: SeManageVolumePrivilege	4488	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3516 wrote to memory of 4652	3516	8C36F8A010E9781BDA4076852EFB05A7.exe	100
PID 3516 wrote to memory of 4652	3516	8C36F8A010E9781BDA4076852EFB05A7.exe	100
PID 3516 wrote to memory of 4652	3516	8C36F8A010E9781BDA4076852EFB05A7.exe	100
PID 4652 wrote to memory of 3640	4652	cmd.exe	102
PID 4652 wrote to memory of 3640	4652	cmd.exe	102
PID 4652 wrote to memory of 3640	4652	cmd.exe	102

C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe
"C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe"
1⤵
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:3516
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /pid 3516 & erase C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe & RD /S /Q C:\\ProgramData\\700972825157161\\* & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4652
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /pid 3516
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3640

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" "C:\Windows\SYSTEM32\EDGEHTML.dll",#141 Microsoft.VCLibs.140.00_8wekyb3d8bbwe
1⤵
PID:4564

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k UnistackSvcGroup
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4488

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\mozglue.dll

Filesize
133KB

MD5
8f73c08a9660691143661bf7332c3c27

SHA1
37fa65dd737c50fda710fdbde89e51374d0c204a

SHA256
3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

SHA512
0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

Download Submit
C:\ProgramData\nss3.dll

Filesize
951KB

MD5
0daa3bbae94b235bbaaf5b9c0c7ac521

SHA1
8d31fa29babe1c88c72c0c4e35e618b5bb850829

SHA256
3df4946812ab6d8b20d23b34538cbd8e8c264d60de7811294bc2f4b46ec6c9a6

SHA512
a3a259af84ed280266522ef3ed4486eea36b32a4d0a956f458dd4df6ede03b1dc34ae7e55d601f09eaedddc9646012fb4cd74eb410d4cadeb59888aeb3e85eb5

Download Submit
C:\ProgramData\sqlite3.dll

Filesize
630KB

MD5
e477a96c8f2b18d6b5c27bde49c990bf

SHA1
e980c9bf41330d1e5bd04556db4646a0210f7409

SHA256
16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660

SHA512
335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

Download Submit
memory/4488-64-0x000001857F240000-0x000001857F250000-memory.dmp

Filesize
64KB

Download
memory/4488-80-0x000001857F340000-0x000001857F350000-memory.dmp

Filesize
64KB

Download
memory/4488-96-0x000001857F650000-0x000001857F651000-memory.dmp

Filesize
4KB

Download
memory/4488-98-0x000001857F680000-0x000001857F681000-memory.dmp

Filesize
4KB

Download
memory/4488-99-0x000001857F680000-0x000001857F681000-memory.dmp

Filesize
4KB

Download
memory/4488-100-0x000001857F790000-0x000001857F791000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads