shurk | 57aa4872adba9a733f5ce772f4a4bfd579210656323d000a44107a96ba736cdf

Analysis

max time kernel
128s
max time network
138s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-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
behavioral3/memory/5024-134-0x0000000000400000-0x0000000000C71000-memory.dmp	shurk_stealer
behavioral3/memory/5024-148-0x0000000000400000-0x0000000000C71000-memory.dmp	shurk_stealer
behavioral3/memory/5024-150-0x0000000000400000-0x0000000000C71000-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
behavioral3/memory/5024-134-0x0000000000400000-0x0000000000C71000-memory.dmp	upx
behavioral3/memory/5024-148-0x0000000000400000-0x0000000000C71000-memory.dmp	upx
behavioral3/memory/5024-150-0x0000000000400000-0x0000000000C71000-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
3	checkip.amazonaws.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4784	WMIC.exe

GoLang User-Agent 3 IoCs

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

description	flow	ioc
HTTP User-Agent header	7	Go-http-client/1.1
HTTP User-Agent header	25	Go-http-client/1.1
HTTP User-Agent header	4	Go-http-client/1.1

Suspicious use of AdjustPrivilegeToken 42 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4784	WMIC.exe
Token: SeSecurityPrivilege	4784	WMIC.exe
Token: SeTakeOwnershipPrivilege	4784	WMIC.exe
Token: SeLoadDriverPrivilege	4784	WMIC.exe
Token: SeSystemProfilePrivilege	4784	WMIC.exe
Token: SeSystemtimePrivilege	4784	WMIC.exe
Token: SeProfSingleProcessPrivilege	4784	WMIC.exe
Token: SeIncBasePriorityPrivilege	4784	WMIC.exe
Token: SeCreatePagefilePrivilege	4784	WMIC.exe
Token: SeBackupPrivilege	4784	WMIC.exe
Token: SeRestorePrivilege	4784	WMIC.exe
Token: SeShutdownPrivilege	4784	WMIC.exe
Token: SeDebugPrivilege	4784	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4784	WMIC.exe
Token: SeRemoteShutdownPrivilege	4784	WMIC.exe
Token: SeUndockPrivilege	4784	WMIC.exe
Token: SeManageVolumePrivilege	4784	WMIC.exe
Token: 33	4784	WMIC.exe
Token: 34	4784	WMIC.exe
Token: 35	4784	WMIC.exe
Token: 36	4784	WMIC.exe
Token: SeIncreaseQuotaPrivilege	4784	WMIC.exe
Token: SeSecurityPrivilege	4784	WMIC.exe
Token: SeTakeOwnershipPrivilege	4784	WMIC.exe
Token: SeLoadDriverPrivilege	4784	WMIC.exe
Token: SeSystemProfilePrivilege	4784	WMIC.exe
Token: SeSystemtimePrivilege	4784	WMIC.exe
Token: SeProfSingleProcessPrivilege	4784	WMIC.exe
Token: SeIncBasePriorityPrivilege	4784	WMIC.exe
Token: SeCreatePagefilePrivilege	4784	WMIC.exe
Token: SeBackupPrivilege	4784	WMIC.exe
Token: SeRestorePrivilege	4784	WMIC.exe
Token: SeShutdownPrivilege	4784	WMIC.exe
Token: SeDebugPrivilege	4784	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4784	WMIC.exe
Token: SeRemoteShutdownPrivilege	4784	WMIC.exe
Token: SeUndockPrivilege	4784	WMIC.exe
Token: SeManageVolumePrivilege	4784	WMIC.exe
Token: 33	4784	WMIC.exe
Token: 34	4784	WMIC.exe
Token: 35	4784	WMIC.exe
Token: 36	4784	WMIC.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5024 wrote to memory of 2336	5024	Rust Hack.exe	88
PID 5024 wrote to memory of 2336	5024	Rust Hack.exe	88
PID 2336 wrote to memory of 4784	2336	cmd.exe	89
PID 2336 wrote to memory of 4784	2336	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\Rust Hack.exe
"C:\Users\Admin\AppData\Local\Temp\Rust Hack.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5024
- C:\Windows\system32\cmd.exe
  cmd /C "wmic path win32_VideoController get name"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2336
- - C:\Windows\System32\Wbem\WMIC.exe
    wmic path win32_VideoController get name
    3⤵
    - Detects videocard installed
    - Suspicious use of AdjustPrivilegeToken
    PID:4784

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/5024-133-0x000001228F250000-0x000001228F91A000-memory.dmp

Filesize
6.8MB

Download
memory/5024-134-0x0000000000400000-0x0000000000C71000-memory.dmp

Filesize
8.4MB

Download
memory/5024-148-0x0000000000400000-0x0000000000C71000-memory.dmp

Filesize
8.4MB

Download
memory/5024-149-0x000001228F250000-0x000001228F91A000-memory.dmp

Filesize
6.8MB

Download
memory/5024-150-0x0000000000400000-0x0000000000C71000-memory.dmp

Filesize
8.4MB

Download