oski | 3a864661a90832c69af659cded8fed239d8d157ee2334bdfbab78034e5453ef5

Analysis

max time kernel
143s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
11/08/2023, 01:49

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General

Target
1214ecff163eb393c89cdf5d4623b40eae8150af6ec578bbb26a535b66af822a.exe
Size 256KB
Sample230811-b8n2rsaa76
SHA256 1214ecff163eb393c89cdf5d4623b40eae8150af6ec578bbb26a535b66af822a
MD5 a9173de71087efdd86e903af04eb8e2d
SHA1 52c9d2a0b2a930070da73df07de39bf7c2f16691
SHA512 59cf21fd347ef58682ce084db25d1c2588b1277867c4429234e91221e4e2e234ca0e4de3b0f32d68baded47facd64bfadbd2b4871474d8d16105a53ed3d0aa96
SSDEEP 6144:AfUauY68uSWCx+XA7mg2pNv1LjCei8TI3c:4wY68u1Cx+wm/pP7TI
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

oski 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
1712	1214ecff163eb393c89cdf5d4623b40eae8150af6ec578bbb26a535b66af822a.exe
1712	1214ecff163eb393c89cdf5d4623b40eae8150af6ec578bbb26a535b66af822a.exe
1712	1214ecff163eb393c89cdf5d4623b40eae8150af6ec578bbb26a535b66af822a.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
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
992	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	992	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1712 wrote to memory of 212	1712	1214ecff163eb393c89cdf5d4623b40eae8150af6ec578bbb26a535b66af822a.exe	86
PID 1712 wrote to memory of 212	1712	1214ecff163eb393c89cdf5d4623b40eae8150af6ec578bbb26a535b66af822a.exe	86
PID 1712 wrote to memory of 212	1712	1214ecff163eb393c89cdf5d4623b40eae8150af6ec578bbb26a535b66af822a.exe	86
PID 212 wrote to memory of 992	212	cmd.exe	88
PID 212 wrote to memory of 992	212	cmd.exe	88
PID 212 wrote to memory of 992	212	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\1214ecff163eb393c89cdf5d4623b40eae8150af6ec578bbb26a535b66af822a.exe
"C:\Users\Admin\AppData\Local\Temp\1214ecff163eb393c89cdf5d4623b40eae8150af6ec578bbb26a535b66af822a.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1712
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /pid 1712 & erase C:\Users\Admin\AppData\Local\Temp\1214ecff163eb393c89cdf5d4623b40eae8150af6ec578 & RD /S /Q C:\\ProgramData\\668497411687401\\* & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:212
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /pid 1712
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:992

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

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

mozglue.dll

Path C:\ProgramData\mozglue.dll
Size 133KB
SHA256 3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
MD5 8f73c08a9660691143661bf7332c3c27
SHA1 37fa65dd737c50fda710fdbde89e51374d0c204a
SHA512 0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89
SSDEEP 3072:7Gyzk/x2Wp53pUzPoNpj/kVghp1qt/dXDyp4D2JJJvPhrSeTuk:6yQ2Wp53iO/kVghp12/dXDyyD2JJJvPR
MD5 SHA1 SHA512 SSDEEP

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nss3.dll

Path C:\ProgramData\nss3.dll
Size 1.2MB
SHA256 e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
MD5 bfac4e3c5908856ba17d41edcd455a51
SHA1 8eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA512 2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66
SSDEEP 24576:Sb5zzlswYNYLVJAwfpeYQ1Dw/fEE8DhSJVIVfRyAkgO6S/V/jbHpls4MSRSMxkoo:4zW5ygDwnEZIYkjgWjblMSRSMqH
MD5 SHA1 SHA512 SSDEEP

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sqlite3.dll

Path C:\ProgramData\sqlite3.dll
Size 630KB
SHA256 16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660
MD5 e477a96c8f2b18d6b5c27bde49c990bf
SHA1 e980c9bf41330d1e5bd04556db4646a0210f7409
SHA512 335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c
SSDEEP 12288:i0zrcH2F3OfwjtWvuFEmhx0Cj37670jwX+E7tFKm0qTYh:iJUOfwh8u9hx0D70NE7tFTYh
MD5 SHA1 SHA512 SSDEEP

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads