shurk | 7ea4937a54c4f1373be662d2a8c3bb4aa34faf25dff90318921bdc5a5853524c

General

Target

mixazed_20210731-070734.exe
Size

430KB
MD5

a7e7c55d763359f4b590ea4eec10b800
SHA1

c9c9c25f0f90048face442c607428cfbfdc3798b
SHA256

7ea4937a54c4f1373be662d2a8c3bb4aa34faf25dff90318921bdc5a5853524c
SHA512

71fedc8d1d8961c9e253876f66f434694fe7df200d391af577602a83046bc4698bb174cb93ecc78ef9bb4b75fa19cf15d35d21f4b349c29fd22008c4089bd08a

Score

10^/10

shurk infostealer spyware stealer

Malware Config

Signatures

Shurk
Shurk is an infostealer, written in C++ which appeared in 2021.
infostealer shurk

Shurk Stealer Payload 3 IoCs

resource	yara_rule
behavioral1/memory/1732-65-0x000000000044617B-mapping.dmp	shurk_stealer
behavioral1/memory/1732-64-0x0000000000400000-0x000000000047A000-memory.dmp	shurk_stealer
behavioral1/memory/1732-66-0x0000000000400000-0x000000000047A000-memory.dmp	shurk_stealer

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 1 IoCs

description	pid	Process	procid_target
PID 1912 set thread context of 1732	1912	mixazed_20210731-070734.exe	29

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1732	mixazed_20210731-070734.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1912	mixazed_20210731-070734.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1912 wrote to memory of 1732	1912	mixazed_20210731-070734.exe	29
PID 1912 wrote to memory of 1732	1912	mixazed_20210731-070734.exe	29
PID 1912 wrote to memory of 1732	1912	mixazed_20210731-070734.exe	29
PID 1912 wrote to memory of 1732	1912	mixazed_20210731-070734.exe	29
PID 1912 wrote to memory of 1732	1912	mixazed_20210731-070734.exe	29
PID 1912 wrote to memory of 1732	1912	mixazed_20210731-070734.exe	29
PID 1912 wrote to memory of 1732	1912	mixazed_20210731-070734.exe	29
PID 1912 wrote to memory of 1732	1912	mixazed_20210731-070734.exe	29
PID 1912 wrote to memory of 1732	1912	mixazed_20210731-070734.exe	29
PID 1912 wrote to memory of 1732	1912	mixazed_20210731-070734.exe	29
PID 1912 wrote to memory of 1732	1912	mixazed_20210731-070734.exe	29

C:\Users\Admin\AppData\Local\Temp\mixazed_20210731-070734.exe
"C:\Users\Admin\AppData\Local\Temp\mixazed_20210731-070734.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1912
- C:\Users\Admin\AppData\Local\Temp\mixazed_20210731-070734.exe
  C:\Users\Admin\AppData\Local\Temp\mixazed_20210731-070734.exe
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1732

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1732-64-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/1732-66-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/1912-59-0x0000000000A50000-0x0000000000A51000-memory.dmp

Filesize
4KB

Download
memory/1912-61-0x0000000000510000-0x0000000000511000-memory.dmp

Filesize
4KB

Download
memory/1912-62-0x00000000754F1000-0x00000000754F3000-memory.dmp

Filesize
8KB

Download
memory/1912-63-0x00000000002C0000-0x00000000002CE000-memory.dmp

Filesize
56KB

Download

Analysis

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