oski | 10f7569d170015cfddf59a775fa5dfc4108a83544902028a4e89ca740fd889a0

Analysis

max time kernel
118s
max time network
127s
platform
windows7_x64
resource
win7-20231023-en
resource tags

arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
submitted
05-11-2023 02:38

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General

Target

078e034c9471d383cda140f060f9ff26960d0674cfc9d0c05d0c704dbe5cf9ab.exe
Size

200KB
MD5

95c729597254d7d13131a1d787ee8672
SHA1

d44dd5beba366c2dd917ca0ed0ba5ff109d765c7
SHA256

078e034c9471d383cda140f060f9ff26960d0674cfc9d0c05d0c704dbe5cf9ab
SHA512

aa12e5ec478a25adf150da2f48aefe690716549f2d5a075e3d2e469ff626c8377e0a7bd4c6918b8e60bbe7be0a7428bf52fde71e3b7a66b3a88a24dffa3717ce
SSDEEP

3072:WfUomEuYm98dlSq7gt5q7Dx+XgS6aCEwhOfUbCalNT2pbB3fIF1Xi6FLPo3c:WfUauY68uSWCx+XA7mg2pN01Ljo3c

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
2436	078e034c9471d383cda140f060f9ff26960d0674cfc9d0c05d0c704dbe5cf9ab.exe
2436	078e034c9471d383cda140f060f9ff26960d0674cfc9d0c05d0c704dbe5cf9ab.exe
2436	078e034c9471d383cda140f060f9ff26960d0674cfc9d0c05d0c704dbe5cf9ab.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	078e034c9471d383cda140f060f9ff26960d0674cfc9d0c05d0c704dbe5cf9ab.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2568	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2568	taskkill.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2436 wrote to memory of 2496	2436	078e034c9471d383cda140f060f9ff26960d0674cfc9d0c05d0c704dbe5cf9ab.exe	29
PID 2436 wrote to memory of 2496	2436	078e034c9471d383cda140f060f9ff26960d0674cfc9d0c05d0c704dbe5cf9ab.exe	29
PID 2436 wrote to memory of 2496	2436	078e034c9471d383cda140f060f9ff26960d0674cfc9d0c05d0c704dbe5cf9ab.exe	29
PID 2436 wrote to memory of 2496	2436	078e034c9471d383cda140f060f9ff26960d0674cfc9d0c05d0c704dbe5cf9ab.exe	29
PID 2496 wrote to memory of 2568	2496	cmd.exe	31
PID 2496 wrote to memory of 2568	2496	cmd.exe	31
PID 2496 wrote to memory of 2568	2496	cmd.exe	31
PID 2496 wrote to memory of 2568	2496	cmd.exe	31

C:\Users\Admin\AppData\Local\Temp\078e034c9471d383cda140f060f9ff26960d0674cfc9d0c05d0c704dbe5cf9ab.exe
"C:\Users\Admin\AppData\Local\Temp\078e034c9471d383cda140f060f9ff26960d0674cfc9d0c05d0c704dbe5cf9ab.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:2436
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /pid 2436 & erase C:\Users\Admin\AppData\Local\Temp\078e034c9471d383cda140f060f9ff26960d0674cfc9d0' & RD /S /Q C:\\ProgramData\\144656399822553\\* & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2496
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /pid 2436
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2568

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

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

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\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

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