oski | 1214ecff163eb393c89cdf5d4623b40eae8150af6ec578bbb26a535b66af822a

Analysis

max time kernel
119s
max time network
123s
platform
windows7_x64
resource
win7-20230712-en
resource tags

arch:x64arch:x86image:win7-20230712-enlocale:en-usos:windows7-x64system
submitted
09-08-2023 20:43

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General

Target

a9173de71087efdd86e903af04eb8e2d.exe
Size

256KB
MD5

a9173de71087efdd86e903af04eb8e2d
SHA1

52c9d2a0b2a930070da73df07de39bf7c2f16691
SHA256

1214ecff163eb393c89cdf5d4623b40eae8150af6ec578bbb26a535b66af822a
SHA512

59cf21fd347ef58682ce084db25d1c2588b1277867c4429234e91221e4e2e234ca0e4de3b0f32d68baded47facd64bfadbd2b4871474d8d16105a53ed3d0aa96
SSDEEP

6144:AfUauY68uSWCx+XA7mg2pNv1LjCei8TI3c:4wY68u1Cx+wm/pP7TI

Score

10^/10

oski infostealer spyware stealer

Malware Config

Extracted

Family

oski

de4mon-p4nel.site/oski/

Signatures

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

Deletes itself 1 IoCs

pid	Process
2780	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2364	591092391528.exe

Loads dropped DLL 10 IoCs

pid	Process
1064	a9173de71087efdd86e903af04eb8e2d.exe
1064	a9173de71087efdd86e903af04eb8e2d.exe
1064	a9173de71087efdd86e903af04eb8e2d.exe
1064	a9173de71087efdd86e903af04eb8e2d.exe
1064	a9173de71087efdd86e903af04eb8e2d.exe
2364	591092391528.exe
2364	591092391528.exe
2364	591092391528.exe
2364	591092391528.exe
2364	591092391528.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 2 IoCs

evasion

pid	Process
596	taskkill.exe
2180	taskkill.exe

NTFS ADS 1 IoCs

description	ioc	Process
File created	C:\ProgramData\591092391528.exe:Zone.Identifier	a9173de71087efdd86e903af04eb8e2d.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	596	taskkill.exe
Token: SeDebugPrivilege	2180	taskkill.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1064 wrote to memory of 2364	1064	a9173de71087efdd86e903af04eb8e2d.exe	29
PID 1064 wrote to memory of 2364	1064	a9173de71087efdd86e903af04eb8e2d.exe	29
PID 1064 wrote to memory of 2364	1064	a9173de71087efdd86e903af04eb8e2d.exe	29
PID 1064 wrote to memory of 2364	1064	a9173de71087efdd86e903af04eb8e2d.exe	29
PID 1064 wrote to memory of 2780	1064	a9173de71087efdd86e903af04eb8e2d.exe	30
PID 1064 wrote to memory of 2780	1064	a9173de71087efdd86e903af04eb8e2d.exe	30
PID 1064 wrote to memory of 2780	1064	a9173de71087efdd86e903af04eb8e2d.exe	30
PID 1064 wrote to memory of 2780	1064	a9173de71087efdd86e903af04eb8e2d.exe	30
PID 2780 wrote to memory of 596	2780	cmd.exe	32
PID 2780 wrote to memory of 596	2780	cmd.exe	32
PID 2780 wrote to memory of 596	2780	cmd.exe	32
PID 2780 wrote to memory of 596	2780	cmd.exe	32
PID 2364 wrote to memory of 1980	2364	591092391528.exe	34
PID 2364 wrote to memory of 1980	2364	591092391528.exe	34
PID 2364 wrote to memory of 1980	2364	591092391528.exe	34
PID 2364 wrote to memory of 1980	2364	591092391528.exe	34
PID 1980 wrote to memory of 2180	1980	cmd.exe	36
PID 1980 wrote to memory of 2180	1980	cmd.exe	36
PID 1980 wrote to memory of 2180	1980	cmd.exe	36
PID 1980 wrote to memory of 2180	1980	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\a9173de71087efdd86e903af04eb8e2d.exe
"C:\Users\Admin\AppData\Local\Temp\a9173de71087efdd86e903af04eb8e2d.exe"
1⤵
- Loads dropped DLL
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:1064
- C:\ProgramData\591092391528.exe
  "C:\ProgramData\591092391528.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2364
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c taskkill /pid 2364 & erase C:\ProgramData\591092391528.exe & RD /S /Q C:\\ProgramData\\792853404569403\\* & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1980
  - - C:\Windows\SysWOW64\taskkill.exe
      taskkill /pid 2364
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:2180
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /pid 1064 & erase C:\Users\Admin\AppData\Local\Temp\a9173de71087efdd86e903af04eb8e2d.exe & RD /S /Q C:\\ProgramData\\004464945423890\\* & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2780
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /pid 1064
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:596

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

C:\ProgramData\591092391528.exe

Filesize
256KB

MD5
3f6188343ac2fa3f0045d0b5f88ace84

SHA1
d3d89b7bfeef92e6f0340811a15d6ac112043786

SHA256
8656338dc5a673ef846a9e79961b4c53af7a8d3f99a89368b79a71812230b0f2

SHA512
d4f074080845ccbe066e613f4b80f830f8f0175d42208597d269b3d156d83356777f517e63b32e2c3d9652a56f07a7e6d6bee70c2b3d90dfe95b6caac6687c90

Download Submit
C:\ProgramData\591092391528.exe

Filesize
256KB

MD5
3f6188343ac2fa3f0045d0b5f88ace84

SHA1
d3d89b7bfeef92e6f0340811a15d6ac112043786

SHA256
8656338dc5a673ef846a9e79961b4c53af7a8d3f99a89368b79a71812230b0f2

SHA512
d4f074080845ccbe066e613f4b80f830f8f0175d42208597d269b3d156d83356777f517e63b32e2c3d9652a56f07a7e6d6bee70c2b3d90dfe95b6caac6687c90

Download Submit
C:\ProgramData\591092391528.exe

Filesize
256KB

MD5
3f6188343ac2fa3f0045d0b5f88ace84

SHA1
d3d89b7bfeef92e6f0340811a15d6ac112043786

SHA256
8656338dc5a673ef846a9e79961b4c53af7a8d3f99a89368b79a71812230b0f2

SHA512
d4f074080845ccbe066e613f4b80f830f8f0175d42208597d269b3d156d83356777f517e63b32e2c3d9652a56f07a7e6d6bee70c2b3d90dfe95b6caac6687c90

Download Submit
C:\ProgramData\792853404569403\temp

Filesize
92KB

MD5
aa618dbade57a9abadc9bf372233b35c

SHA1
4080e1aa6578698a6d60fee98c90b4d16559b5e6

SHA256
81fd1292a0426abe44b117f8f324dd33bd5710f9e5286d95d8bec8b01862e4dd

SHA512
253e37cc58ed4b05e03a4e551cce3a8ead7922e9aa3c718e2f5c45ddd7205102a02b8173e5c997157f442f0609647989cd27219f1bdc1ecf4221bc4692fe666f

Download Submit
\ProgramData\591092391528.exe

Filesize
256KB

MD5
3f6188343ac2fa3f0045d0b5f88ace84

SHA1
d3d89b7bfeef92e6f0340811a15d6ac112043786

SHA256
8656338dc5a673ef846a9e79961b4c53af7a8d3f99a89368b79a71812230b0f2

SHA512
d4f074080845ccbe066e613f4b80f830f8f0175d42208597d269b3d156d83356777f517e63b32e2c3d9652a56f07a7e6d6bee70c2b3d90dfe95b6caac6687c90

Download Submit
\ProgramData\591092391528.exe

Filesize
256KB

MD5
3f6188343ac2fa3f0045d0b5f88ace84

SHA1
d3d89b7bfeef92e6f0340811a15d6ac112043786

SHA256
8656338dc5a673ef846a9e79961b4c53af7a8d3f99a89368b79a71812230b0f2

SHA512
d4f074080845ccbe066e613f4b80f830f8f0175d42208597d269b3d156d83356777f517e63b32e2c3d9652a56f07a7e6d6bee70c2b3d90dfe95b6caac6687c90

Download Submit
\ProgramData\mozglue.dll

Filesize
133KB

MD5
8f73c08a9660691143661bf7332c3c27

SHA1
37fa65dd737c50fda710fdbde89e51374d0c204a

SHA256
3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

SHA512
0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

Download Submit
\ProgramData\mozglue.dll

Filesize
133KB

MD5
8f73c08a9660691143661bf7332c3c27

SHA1
37fa65dd737c50fda710fdbde89e51374d0c204a

SHA256
3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

SHA512
0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

Download Submit
\ProgramData\msvcp140.dll

Filesize
429KB

MD5
109f0f02fd37c84bfc7508d4227d7ed5

SHA1
ef7420141bb15ac334d3964082361a460bfdb975

SHA256
334e69ac9367f708ce601a6f490ff227d6c20636da5222f148b25831d22e13d4

SHA512
46eb62b65817365c249b48863d894b4669e20fcb3992e747cd5c9fdd57968e1b2cf7418d1c9340a89865eadda362b8db51947eb4427412eb83b35994f932fd39

Download Submit
\ProgramData\nss3.dll

Filesize
1.2MB

MD5
bfac4e3c5908856ba17d41edcd455a51

SHA1
8eec7e888767aa9e4cca8ff246eb2aacb9170428

SHA256
e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

SHA512
2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

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
\ProgramData\sqlite3.dll

Filesize
630KB

MD5
e477a96c8f2b18d6b5c27bde49c990bf

SHA1
e980c9bf41330d1e5bd04556db4646a0210f7409

SHA256
16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660

SHA512
335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

Download Submit
\ProgramData\vcruntime140.dll

Filesize
81KB

MD5
7587bf9cb4147022cd5681b015183046

SHA1
f2106306a8f6f0da5afb7fc765cfa0757ad5a628

SHA256
c40bb03199a2054dabfc7a8e01d6098e91de7193619effbd0f142a7bf031c14d

SHA512
0b63e4979846ceba1b1ed8470432ea6aa18cca66b5f5322d17b14bc0dfa4b2ee09ca300a016e16a01db5123e4e022820698f46d9bad1078bd24675b4b181e91f

Download Submit