shurk | 771dd9bf1defca2c753a84213394189cbc0937d362e0ae4c93ef1f3f9d16b98d

Analysis

max time kernel
146s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
14-08-2023 01:12

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General

Target

Loader.exe
Size

8.0MB
MD5

22fcb6e52cc1b2e7577a119a595bf8c8
SHA1

e4d1de0a77a3a0fb045c4df5650d0f72093ac56b
SHA256

771dd9bf1defca2c753a84213394189cbc0937d362e0ae4c93ef1f3f9d16b98d
SHA512

5ee636e7b3ec1b35b98a7f4ef06c57bcf3a1fa9ff344fe753550fb42e4733757af0b27a2175daf0f4c141b2e22727d671bb3a49bde9e5a76cd179c8e106d93d6
SSDEEP

196608:Gg1DvMJTJyWVSFi50E3bwcIm7aGkWakK:Gwvu1E2IKaf6K

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 1 IoCs

resource	yara_rule
behavioral2/memory/2768-135-0x00007FF47B8F0000-0x00007FF47C127000-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
T1552.001
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
8	checkip.amazonaws.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4380	WMIC.exe

GoLang User-Agent 3 IoCs

Uses default user-agent string defined by GoLang HTTP packages.

description	flow	ioc
HTTP User-Agent header	9	Go-http-client/1.1
HTTP User-Agent header	11	Go-http-client/1.1
HTTP User-Agent header	14	Go-http-client/1.1

Suspicious use of AdjustPrivilegeToken 42 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4380	WMIC.exe
Token: SeSecurityPrivilege	4380	WMIC.exe
Token: SeTakeOwnershipPrivilege	4380	WMIC.exe
Token: SeLoadDriverPrivilege	4380	WMIC.exe
Token: SeSystemProfilePrivilege	4380	WMIC.exe
Token: SeSystemtimePrivilege	4380	WMIC.exe
Token: SeProfSingleProcessPrivilege	4380	WMIC.exe
Token: SeIncBasePriorityPrivilege	4380	WMIC.exe
Token: SeCreatePagefilePrivilege	4380	WMIC.exe
Token: SeBackupPrivilege	4380	WMIC.exe
Token: SeRestorePrivilege	4380	WMIC.exe
Token: SeShutdownPrivilege	4380	WMIC.exe
Token: SeDebugPrivilege	4380	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4380	WMIC.exe
Token: SeRemoteShutdownPrivilege	4380	WMIC.exe
Token: SeUndockPrivilege	4380	WMIC.exe
Token: SeManageVolumePrivilege	4380	WMIC.exe
Token: 33	4380	WMIC.exe
Token: 34	4380	WMIC.exe
Token: 35	4380	WMIC.exe
Token: 36	4380	WMIC.exe
Token: SeIncreaseQuotaPrivilege	4380	WMIC.exe
Token: SeSecurityPrivilege	4380	WMIC.exe
Token: SeTakeOwnershipPrivilege	4380	WMIC.exe
Token: SeLoadDriverPrivilege	4380	WMIC.exe
Token: SeSystemProfilePrivilege	4380	WMIC.exe
Token: SeSystemtimePrivilege	4380	WMIC.exe
Token: SeProfSingleProcessPrivilege	4380	WMIC.exe
Token: SeIncBasePriorityPrivilege	4380	WMIC.exe
Token: SeCreatePagefilePrivilege	4380	WMIC.exe
Token: SeBackupPrivilege	4380	WMIC.exe
Token: SeRestorePrivilege	4380	WMIC.exe
Token: SeShutdownPrivilege	4380	WMIC.exe
Token: SeDebugPrivilege	4380	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4380	WMIC.exe
Token: SeRemoteShutdownPrivilege	4380	WMIC.exe
Token: SeUndockPrivilege	4380	WMIC.exe
Token: SeManageVolumePrivilege	4380	WMIC.exe
Token: 33	4380	WMIC.exe
Token: 34	4380	WMIC.exe
Token: 35	4380	WMIC.exe
Token: 36	4380	WMIC.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2768 wrote to memory of 628	2768	Loader.exe	83
PID 2768 wrote to memory of 628	2768	Loader.exe	83
PID 628 wrote to memory of 4380	628	cmd.exe	85
PID 628 wrote to memory of 4380	628	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\Loader.exe
"C:\Users\Admin\AppData\Local\Temp\Loader.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2768
- C:\Windows\system32\cmd.exe
  cmd /C "wmic path win32_VideoController get name"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:628
- - C:\Windows\System32\Wbem\WMIC.exe
    wmic path win32_VideoController get name
    3⤵
    - Detects videocard installed
    - Suspicious use of AdjustPrivilegeToken
    PID:4380

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

Replay Monitor

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Downloads

memory/2768-133-0x000001A6DFF90000-0x000001A6E075E000-memory.dmp

Filesize
7.8MB

Download
memory/2768-134-0x000001A6DFF90000-0x000001A6E075E000-memory.dmp

Filesize
7.8MB

Download
memory/2768-135-0x00007FF47B8F0000-0x00007FF47C127000-memory.dmp

Filesize
8.2MB

Download
memory/2768-153-0x0000000000E00000-0x0000000001610000-memory.dmp

Filesize
8.1MB

Download
memory/2768-154-0x000001A6DFF90000-0x000001A6E075E000-memory.dmp

Filesize
7.8MB

Download
memory/2768-156-0x0000000000E00000-0x0000000001610000-memory.dmp

Filesize
8.1MB

Download