shurk | afa50c786124859078e051ae7bb6477d5799782da50cfe6ea9233fb80e88c4dc

Analysis

max time kernel
117s
max time network
123s
platform
windows7_x64
resource
win7-20230712-en
resource tags

arch:x64arch:x86image:win7-20230712-enlocale:en-usos:windows7-x64system
submitted
13-07-2023 06:46

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General

Target

Launcher.exe
Size

6.7MB
MD5

334b9c941a4ea898d1ddba23b76073a7
SHA1

6fb79f20ddcd534e872273c958b375e0cc955718
SHA256

afa50c786124859078e051ae7bb6477d5799782da50cfe6ea9233fb80e88c4dc
SHA512

8be5dfbfe6a1522a20a9c5119d5935bd9569ec00861e8376583431bd9a9b84fafef59359cf0bfcd13b6af1d6bc6fe426bb9bb28e1e0490ab76d8c036edaa8e9b
SSDEEP

98304:iv9wyzNooScrRbKygP8oK8PuT0vK0boUz2sDwzKFpWS2r:i1woeoScrxKyKnKTT0vTbxzUzW2

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 2 IoCs

resource	yara_rule
behavioral1/memory/2456-55-0x0000000002A00000-0x0000000003270000-memory.dmp	shurk_stealer
behavioral1/memory/2456-65-0x0000000002A00000-0x0000000003270000-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 2 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2456-55-0x0000000002A00000-0x0000000003270000-memory.dmp	upx
behavioral1/memory/2456-65-0x0000000002A00000-0x0000000003270000-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
2	checkip.amazonaws.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1256	WMIC.exe

GoLang User-Agent 3 IoCs

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

description	flow	ioc
HTTP User-Agent header	3	Go-http-client/1.1
HTTP User-Agent header	5	Go-http-client/1.1
HTTP User-Agent header	6	Go-http-client/1.1

Suspicious use of AdjustPrivilegeToken 40 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1256	WMIC.exe
Token: SeSecurityPrivilege	1256	WMIC.exe
Token: SeTakeOwnershipPrivilege	1256	WMIC.exe
Token: SeLoadDriverPrivilege	1256	WMIC.exe
Token: SeSystemProfilePrivilege	1256	WMIC.exe
Token: SeSystemtimePrivilege	1256	WMIC.exe
Token: SeProfSingleProcessPrivilege	1256	WMIC.exe
Token: SeIncBasePriorityPrivilege	1256	WMIC.exe
Token: SeCreatePagefilePrivilege	1256	WMIC.exe
Token: SeBackupPrivilege	1256	WMIC.exe
Token: SeRestorePrivilege	1256	WMIC.exe
Token: SeShutdownPrivilege	1256	WMIC.exe
Token: SeDebugPrivilege	1256	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1256	WMIC.exe
Token: SeRemoteShutdownPrivilege	1256	WMIC.exe
Token: SeUndockPrivilege	1256	WMIC.exe
Token: SeManageVolumePrivilege	1256	WMIC.exe
Token: 33	1256	WMIC.exe
Token: 34	1256	WMIC.exe
Token: 35	1256	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1256	WMIC.exe
Token: SeSecurityPrivilege	1256	WMIC.exe
Token: SeTakeOwnershipPrivilege	1256	WMIC.exe
Token: SeLoadDriverPrivilege	1256	WMIC.exe
Token: SeSystemProfilePrivilege	1256	WMIC.exe
Token: SeSystemtimePrivilege	1256	WMIC.exe
Token: SeProfSingleProcessPrivilege	1256	WMIC.exe
Token: SeIncBasePriorityPrivilege	1256	WMIC.exe
Token: SeCreatePagefilePrivilege	1256	WMIC.exe
Token: SeBackupPrivilege	1256	WMIC.exe
Token: SeRestorePrivilege	1256	WMIC.exe
Token: SeShutdownPrivilege	1256	WMIC.exe
Token: SeDebugPrivilege	1256	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1256	WMIC.exe
Token: SeRemoteShutdownPrivilege	1256	WMIC.exe
Token: SeUndockPrivilege	1256	WMIC.exe
Token: SeManageVolumePrivilege	1256	WMIC.exe
Token: 33	1256	WMIC.exe
Token: 34	1256	WMIC.exe
Token: 35	1256	WMIC.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2456 wrote to memory of 2920	2456	Launcher.exe	30
PID 2456 wrote to memory of 2920	2456	Launcher.exe	30
PID 2456 wrote to memory of 2920	2456	Launcher.exe	30
PID 2920 wrote to memory of 1256	2920	cmd.exe	31
PID 2920 wrote to memory of 1256	2920	cmd.exe	31
PID 2920 wrote to memory of 1256	2920	cmd.exe	31

C:\Users\Admin\AppData\Local\Temp\Launcher.exe
"C:\Users\Admin\AppData\Local\Temp\Launcher.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2456
- C:\Windows\system32\cmd.exe
  cmd /C "wmic path win32_VideoController get name"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2920
- - C:\Windows\System32\Wbem\WMIC.exe
    wmic path win32_VideoController get name
    3⤵
    - Detects videocard installed
    - Suspicious use of AdjustPrivilegeToken
    PID:1256

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

Replay Monitor

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Downloads

memory/2456-54-0x0000000002380000-0x00000000029FF000-memory.dmp

Filesize
6.5MB

Download
memory/2456-55-0x0000000002A00000-0x0000000003270000-memory.dmp

Filesize
8.4MB

Download
memory/2456-65-0x0000000002A00000-0x0000000003270000-memory.dmp

Filesize
8.4MB

Download
memory/2456-66-0x0000000002380000-0x00000000029FF000-memory.dmp

Filesize
6.5MB

Download