oski | 532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92

Analysis

max time kernel
79s
max time network
56s
platform
windows7_x64
resource
win7-20220414-en
submitted
25-05-2022 01:07

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General

Target

532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe
Size

1.2MB
MD5

f754d2350f759e84607ac814a850dd2c
SHA1

dc3074efd9092b42d7b633663ffc3fad876bec06
SHA256

532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92
SHA512

baaf7b758265dd8b5128f6a6f4e39a14be3e8dcd9ea558c6b01c1dc1f7d0a64c98b4570457f82d8b844f2ebcbd80e7981b29af1ca655154a6b1c79b68374e57d

Score

10^/10

oski infostealer spyware stealer suricata

Malware Config

Extracted

Family

oski

xxxze.co.nu

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern
suricata

Executes dropped EXE 2 IoCs

pid	Process
880	rundll32.exe
1812	rundll32.exe

Loads dropped DLL 7 IoCs

pid	Process
1764	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe
880	rundll32.exe
824	WerFault.exe
824	WerFault.exe
824	WerFault.exe
824	WerFault.exe
824	WerFault.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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1764 set thread context of 1652	1764	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe	28
PID 880 set thread context of 1812	880	rundll32.exe	32

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
1780	1652	WerFault.exe	28
824	1812	WerFault.exe	32

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1764	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe
1764	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe
880	rundll32.exe
880	rundll32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1764	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe
Token: SeDebugPrivilege	880	rundll32.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 1764 wrote to memory of 1652	1764	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe	28
PID 1764 wrote to memory of 1652	1764	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe	28
PID 1764 wrote to memory of 1652	1764	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe	28
PID 1764 wrote to memory of 1652	1764	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe	28
PID 1764 wrote to memory of 1652	1764	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe	28
PID 1764 wrote to memory of 1652	1764	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe	28
PID 1764 wrote to memory of 1652	1764	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe	28
PID 1764 wrote to memory of 1652	1764	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe	28
PID 1764 wrote to memory of 1652	1764	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe	28
PID 1652 wrote to memory of 1780	1652	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe	29
PID 1652 wrote to memory of 1780	1652	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe	29
PID 1652 wrote to memory of 1780	1652	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe	29
PID 1652 wrote to memory of 1780	1652	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe	29
PID 1764 wrote to memory of 880	1764	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe	30
PID 1764 wrote to memory of 880	1764	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe	30
PID 1764 wrote to memory of 880	1764	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe	30
PID 1764 wrote to memory of 880	1764	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe	30
PID 1764 wrote to memory of 880	1764	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe	30
PID 1764 wrote to memory of 880	1764	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe	30
PID 1764 wrote to memory of 880	1764	532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe	30
PID 880 wrote to memory of 1812	880	rundll32.exe	32
PID 880 wrote to memory of 1812	880	rundll32.exe	32
PID 880 wrote to memory of 1812	880	rundll32.exe	32
PID 880 wrote to memory of 1812	880	rundll32.exe	32
PID 880 wrote to memory of 1812	880	rundll32.exe	32
PID 880 wrote to memory of 1812	880	rundll32.exe	32
PID 880 wrote to memory of 1812	880	rundll32.exe	32
PID 880 wrote to memory of 1812	880	rundll32.exe	32
PID 880 wrote to memory of 1812	880	rundll32.exe	32
PID 880 wrote to memory of 1812	880	rundll32.exe	32
PID 880 wrote to memory of 1812	880	rundll32.exe	32
PID 880 wrote to memory of 1812	880	rundll32.exe	32
PID 880 wrote to memory of 1812	880	rundll32.exe	32
PID 1812 wrote to memory of 824	1812	rundll32.exe	34
PID 1812 wrote to memory of 824	1812	rundll32.exe	34
PID 1812 wrote to memory of 824	1812	rundll32.exe	34
PID 1812 wrote to memory of 824	1812	rundll32.exe	34

C:\Users\Admin\AppData\Local\Temp\532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe
"C:\Users\Admin\AppData\Local\Temp\532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1764
- C:\Users\Admin\AppData\Local\Temp\532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe
  "C:\Users\Admin\AppData\Local\Temp\532833e85f8f4777d3ac55833d80ffcbf4e337b33f1fda3eb2025a6964694c92.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1652
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1652 -s 552
    3⤵
    - Program crash
    PID:1780
- C:\Users\Admin\AppData\Roaming\uqsese\rundll32.exe
  "C:\Users\Admin\AppData\Roaming\uqsese\rundll32.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:880
- - C:\Users\Admin\AppData\Roaming\uqsese\rundll32.exe
    "C:\Users\Admin\AppData\Roaming\uqsese\rundll32.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:1812
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1812 -s 296
      4⤵
      Loads dropped DLL
      Program crash
      PID:824

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\uqsese\rundll32.exe

Filesize
248KB

MD5
5469d751b4717e7867e474742c38e198

SHA1
a191724230190df2b93b7f38d2b3cc2cd83642ec

SHA256
fc114d29d9ca7f2df3a2b38d75d00d51bec2e90e0e68b793e1dc85d658eaf8e0

SHA512
b6d1129a8e7d8e4dd64d89fa797971f84a79ddac4e0fd86588b8c321ca43b1ab82165b275d1505cccc1c2371749f5ece6fe80da30b367a37e90aba8c3c96e16a

Download Submit
C:\Users\Admin\AppData\Roaming\uqsese\rundll32.exe

Filesize
248KB

MD5
5469d751b4717e7867e474742c38e198

SHA1
a191724230190df2b93b7f38d2b3cc2cd83642ec

SHA256
fc114d29d9ca7f2df3a2b38d75d00d51bec2e90e0e68b793e1dc85d658eaf8e0

SHA512
b6d1129a8e7d8e4dd64d89fa797971f84a79ddac4e0fd86588b8c321ca43b1ab82165b275d1505cccc1c2371749f5ece6fe80da30b367a37e90aba8c3c96e16a

Download Submit
C:\Users\Admin\AppData\Roaming\uqsese\rundll32.exe

Filesize
248KB

MD5
5469d751b4717e7867e474742c38e198

SHA1
a191724230190df2b93b7f38d2b3cc2cd83642ec

SHA256
fc114d29d9ca7f2df3a2b38d75d00d51bec2e90e0e68b793e1dc85d658eaf8e0

SHA512
b6d1129a8e7d8e4dd64d89fa797971f84a79ddac4e0fd86588b8c321ca43b1ab82165b275d1505cccc1c2371749f5ece6fe80da30b367a37e90aba8c3c96e16a

Download Submit
\Users\Admin\AppData\Roaming\uqsese\rundll32.exe

Filesize
248KB

MD5
5469d751b4717e7867e474742c38e198

SHA1
a191724230190df2b93b7f38d2b3cc2cd83642ec

SHA256
fc114d29d9ca7f2df3a2b38d75d00d51bec2e90e0e68b793e1dc85d658eaf8e0

SHA512
b6d1129a8e7d8e4dd64d89fa797971f84a79ddac4e0fd86588b8c321ca43b1ab82165b275d1505cccc1c2371749f5ece6fe80da30b367a37e90aba8c3c96e16a

Download Submit
\Users\Admin\AppData\Roaming\uqsese\rundll32.exe

Filesize
248KB

MD5
5469d751b4717e7867e474742c38e198

SHA1
a191724230190df2b93b7f38d2b3cc2cd83642ec

SHA256
fc114d29d9ca7f2df3a2b38d75d00d51bec2e90e0e68b793e1dc85d658eaf8e0

SHA512
b6d1129a8e7d8e4dd64d89fa797971f84a79ddac4e0fd86588b8c321ca43b1ab82165b275d1505cccc1c2371749f5ece6fe80da30b367a37e90aba8c3c96e16a

Download Submit
\Users\Admin\AppData\Roaming\uqsese\rundll32.exe

Filesize
248KB

MD5
5469d751b4717e7867e474742c38e198

SHA1
a191724230190df2b93b7f38d2b3cc2cd83642ec

SHA256
fc114d29d9ca7f2df3a2b38d75d00d51bec2e90e0e68b793e1dc85d658eaf8e0

SHA512
b6d1129a8e7d8e4dd64d89fa797971f84a79ddac4e0fd86588b8c321ca43b1ab82165b275d1505cccc1c2371749f5ece6fe80da30b367a37e90aba8c3c96e16a

Download Submit
\Users\Admin\AppData\Roaming\uqsese\rundll32.exe

Filesize
248KB

MD5
5469d751b4717e7867e474742c38e198

SHA1
a191724230190df2b93b7f38d2b3cc2cd83642ec

SHA256
fc114d29d9ca7f2df3a2b38d75d00d51bec2e90e0e68b793e1dc85d658eaf8e0

SHA512
b6d1129a8e7d8e4dd64d89fa797971f84a79ddac4e0fd86588b8c321ca43b1ab82165b275d1505cccc1c2371749f5ece6fe80da30b367a37e90aba8c3c96e16a

Download Submit
\Users\Admin\AppData\Roaming\uqsese\rundll32.exe

Filesize
248KB

MD5
5469d751b4717e7867e474742c38e198

SHA1
a191724230190df2b93b7f38d2b3cc2cd83642ec

SHA256
fc114d29d9ca7f2df3a2b38d75d00d51bec2e90e0e68b793e1dc85d658eaf8e0

SHA512
b6d1129a8e7d8e4dd64d89fa797971f84a79ddac4e0fd86588b8c321ca43b1ab82165b275d1505cccc1c2371749f5ece6fe80da30b367a37e90aba8c3c96e16a

Download Submit
\Users\Admin\AppData\Roaming\uqsese\rundll32.exe

Filesize
248KB

MD5
5469d751b4717e7867e474742c38e198

SHA1
a191724230190df2b93b7f38d2b3cc2cd83642ec

SHA256
fc114d29d9ca7f2df3a2b38d75d00d51bec2e90e0e68b793e1dc85d658eaf8e0

SHA512
b6d1129a8e7d8e4dd64d89fa797971f84a79ddac4e0fd86588b8c321ca43b1ab82165b275d1505cccc1c2371749f5ece6fe80da30b367a37e90aba8c3c96e16a

Download Submit
\Users\Admin\AppData\Roaming\uqsese\rundll32.exe

Filesize
248KB

MD5
5469d751b4717e7867e474742c38e198

SHA1
a191724230190df2b93b7f38d2b3cc2cd83642ec

SHA256
fc114d29d9ca7f2df3a2b38d75d00d51bec2e90e0e68b793e1dc85d658eaf8e0

SHA512
b6d1129a8e7d8e4dd64d89fa797971f84a79ddac4e0fd86588b8c321ca43b1ab82165b275d1505cccc1c2371749f5ece6fe80da30b367a37e90aba8c3c96e16a

Download Submit
memory/880-80-0x00000000004A0000-0x00000000004AA000-memory.dmp

Filesize
40KB

Download
memory/880-79-0x0000000004D85000-0x0000000004D96000-memory.dmp

Filesize
68KB

Download
memory/880-78-0x0000000000470000-0x000000000047A000-memory.dmp

Filesize
40KB

Download
memory/880-77-0x00000000002A0000-0x00000000002E4000-memory.dmp

Filesize
272KB

Download
memory/1652-65-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1652-62-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1652-68-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1652-64-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1652-60-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1652-59-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1652-70-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1764-56-0x00000000002D0000-0x00000000002DA000-memory.dmp

Filesize
40KB

Download
memory/1764-57-0x00000000045B5000-0x00000000045C6000-memory.dmp

Filesize
68KB

Download
memory/1764-58-0x00000000002F0000-0x00000000002FC000-memory.dmp

Filesize
48KB

Download
memory/1764-55-0x0000000074F91000-0x0000000074F93000-memory.dmp

Filesize
8KB

Download
memory/1764-54-0x0000000000F80000-0x00000000010C4000-memory.dmp

Filesize
1.3MB

Download
memory/1812-87-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/1812-82-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/1812-98-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/1812-83-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/1812-85-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/1812-91-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/1812-95-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/1812-89-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download