shurk | 57aa4872adba9a733f5ce772f4a4bfd579210656323d000a44107a96ba736cdf

Analysis

max time kernel
143s
max time network
148s
platform
windows10-1703_x64
resource
win10-20230703-en
resource tags

arch:x64arch:x86image:win10-20230703-enlocale:en-usos:windows10-1703-x64system
submitted
11-07-2023 08:47

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General

Target

Rust Hack.exe
Size

7.0MB
MD5

a3c7d3b14f27d4426e9b4f4c578b4af1
SHA1

56422509d3cd442311e7961dabd6222697461e64
SHA256

57aa4872adba9a733f5ce772f4a4bfd579210656323d000a44107a96ba736cdf
SHA512

0de1ef356b5dae03760f47fc80cc4f6e467a9aef0839b400d545e182a204f630f6f5bab3872d880702061026621b0d04b5c86f58138819a7859f75e09322268b
SSDEEP

98304:eoFcATF6PTOsDqB2NHFMrVQBB3S3en5IXkHt+07GNlf6NGnAC053zfVjOTHif:eoFNJ6PTOsDqQPmQ2W3807ElbACY8TC

Score

10^/10

shurk infostealer spyware stealer upx

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/2504-120-0x0000000000400000-0x0000000000C71000-memory.dmp	shurk_stealer
behavioral1/memory/2504-131-0x0000000000400000-0x0000000000C71000-memory.dmp	shurk_stealer
behavioral1/memory/2504-132-0x0000000000400000-0x0000000000C71000-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

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2504-120-0x0000000000400000-0x0000000000C71000-memory.dmp	upx
behavioral1/memory/2504-131-0x0000000000400000-0x0000000000C71000-memory.dmp	upx
behavioral1/memory/2504-132-0x0000000000400000-0x0000000000C71000-memory.dmp	upx

Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081

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
1	checkip.amazonaws.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
5020	WMIC.exe

GoLang User-Agent 3 IoCs

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

description	flow	ioc
HTTP User-Agent header	2	Go-http-client/1.1
HTTP User-Agent header	4	Go-http-client/1.1
HTTP User-Agent header	7	Go-http-client/1.1

Suspicious use of AdjustPrivilegeToken 42 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	5020	WMIC.exe
Token: SeSecurityPrivilege	5020	WMIC.exe
Token: SeTakeOwnershipPrivilege	5020	WMIC.exe
Token: SeLoadDriverPrivilege	5020	WMIC.exe
Token: SeSystemProfilePrivilege	5020	WMIC.exe
Token: SeSystemtimePrivilege	5020	WMIC.exe
Token: SeProfSingleProcessPrivilege	5020	WMIC.exe
Token: SeIncBasePriorityPrivilege	5020	WMIC.exe
Token: SeCreatePagefilePrivilege	5020	WMIC.exe
Token: SeBackupPrivilege	5020	WMIC.exe
Token: SeRestorePrivilege	5020	WMIC.exe
Token: SeShutdownPrivilege	5020	WMIC.exe
Token: SeDebugPrivilege	5020	WMIC.exe
Token: SeSystemEnvironmentPrivilege	5020	WMIC.exe
Token: SeRemoteShutdownPrivilege	5020	WMIC.exe
Token: SeUndockPrivilege	5020	WMIC.exe
Token: SeManageVolumePrivilege	5020	WMIC.exe
Token: 33	5020	WMIC.exe
Token: 34	5020	WMIC.exe
Token: 35	5020	WMIC.exe
Token: 36	5020	WMIC.exe
Token: SeIncreaseQuotaPrivilege	5020	WMIC.exe
Token: SeSecurityPrivilege	5020	WMIC.exe
Token: SeTakeOwnershipPrivilege	5020	WMIC.exe
Token: SeLoadDriverPrivilege	5020	WMIC.exe
Token: SeSystemProfilePrivilege	5020	WMIC.exe
Token: SeSystemtimePrivilege	5020	WMIC.exe
Token: SeProfSingleProcessPrivilege	5020	WMIC.exe
Token: SeIncBasePriorityPrivilege	5020	WMIC.exe
Token: SeCreatePagefilePrivilege	5020	WMIC.exe
Token: SeBackupPrivilege	5020	WMIC.exe
Token: SeRestorePrivilege	5020	WMIC.exe
Token: SeShutdownPrivilege	5020	WMIC.exe
Token: SeDebugPrivilege	5020	WMIC.exe
Token: SeSystemEnvironmentPrivilege	5020	WMIC.exe
Token: SeRemoteShutdownPrivilege	5020	WMIC.exe
Token: SeUndockPrivilege	5020	WMIC.exe
Token: SeManageVolumePrivilege	5020	WMIC.exe
Token: 33	5020	WMIC.exe
Token: 34	5020	WMIC.exe
Token: 35	5020	WMIC.exe
Token: 36	5020	WMIC.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2504 wrote to memory of 3184	2504	Rust Hack.exe	72
PID 2504 wrote to memory of 3184	2504	Rust Hack.exe	72
PID 3184 wrote to memory of 5020	3184	cmd.exe	73
PID 3184 wrote to memory of 5020	3184	cmd.exe	73

C:\Users\Admin\AppData\Local\Temp\Rust Hack.exe
"C:\Users\Admin\AppData\Local\Temp\Rust Hack.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2504
- C:\Windows\system32\cmd.exe
  cmd /C "wmic path win32_VideoController get name"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3184
- - C:\Windows\System32\Wbem\WMIC.exe
    wmic path win32_VideoController get name
    3⤵
    - Detects videocard installed
    - Suspicious use of AdjustPrivilegeToken
    PID:5020

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

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Downloads

memory/2504-120-0x0000000000400000-0x0000000000C71000-memory.dmp

Filesize
8.4MB

Download
memory/2504-128-0x0000026796520000-0x0000026796BEA000-memory.dmp

Filesize
6.8MB

Download
memory/2504-131-0x0000000000400000-0x0000000000C71000-memory.dmp

Filesize
8.4MB

Download
memory/2504-132-0x0000000000400000-0x0000000000C71000-memory.dmp

Filesize
8.4MB

Download