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

Processes:

resource	yara_rule
behavioral2/memory/412-120-0x0000000000400000-0x000000000047A000-memory.dmp	shurk_stealer
behavioral2/memory/412-121-0x000000000044617B-mapping.dmp	shurk_stealer
behavioral2/memory/412-122-0x0000000000400000-0x000000000047A000-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

Processes:

mixazed_20210731-070734.exe

description pid process target process

PID 3984 set thread context of 412 3984 mixazed_20210731-070734.exe mixazed_20210731-070734.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

mixazed_20210731-070734.exe

pid process

412 mixazed_20210731-070734.exe
412 mixazed_20210731-070734.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

mixazed_20210731-070734.exe

description pid process

Token: SeDebugPrivilege 3984 mixazed_20210731-070734.exe

description	pid	process	target process
PID 3984 set thread context of 412	3984	mixazed_20210731-070734.exe	mixazed_20210731-070734.exe

pid	process
412	mixazed_20210731-070734.exe
412	mixazed_20210731-070734.exe

description	pid	process
Token: SeDebugPrivilege	3984	mixazed_20210731-070734.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

mixazed_20210731-070734.exe

description	pid	process	target process
PID 3984 wrote to memory of 412	3984	mixazed_20210731-070734.exe	mixazed_20210731-070734.exe
PID 3984 wrote to memory of 412	3984	mixazed_20210731-070734.exe	mixazed_20210731-070734.exe
PID 3984 wrote to memory of 412	3984	mixazed_20210731-070734.exe	mixazed_20210731-070734.exe
PID 3984 wrote to memory of 412	3984	mixazed_20210731-070734.exe	mixazed_20210731-070734.exe
PID 3984 wrote to memory of 412	3984	mixazed_20210731-070734.exe	mixazed_20210731-070734.exe
PID 3984 wrote to memory of 412	3984	mixazed_20210731-070734.exe	mixazed_20210731-070734.exe
PID 3984 wrote to memory of 412	3984	mixazed_20210731-070734.exe	mixazed_20210731-070734.exe
PID 3984 wrote to memory of 412	3984	mixazed_20210731-070734.exe	mixazed_20210731-070734.exe
PID 3984 wrote to memory of 412	3984	mixazed_20210731-070734.exe	mixazed_20210731-070734.exe
PID 3984 wrote to memory of 412	3984	mixazed_20210731-070734.exe	mixazed_20210731-070734.exe

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:3984

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:412

Network

MITRE ATT&CK Matrix ATT&CK 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

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/412-120-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/412-121-0x000000000044617B-mapping.dmp

Download
memory/412-122-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/3984-114-0x00000000006D0000-0x00000000006D1000-memory.dmp

Filesize
4KB

Download
memory/3984-116-0x0000000004FD0000-0x0000000004FD1000-memory.dmp

Filesize
4KB

Download
memory/3984-117-0x00000000029B0000-0x00000000029BE000-memory.dmp

Filesize
56KB

Download
memory/3984-118-0x0000000004FE0000-0x0000000004FE1000-memory.dmp

Filesize
4KB

Download
memory/3984-119-0x0000000004F70000-0x0000000004F71000-memory.dmp

Filesize
4KB

Download

Analysis

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