shurk | 5aa334801bc8cbb237dce697204736b502a85b02311d43302e94fde3a2f6e53e

Analysis

max time kernel
36s
max time network
38s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
25-03-2024 10:55

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General

Target

Delux.exe
Size

6.7MB
MD5

1587b8a54af451c287c552e390c59e38
SHA1

cf15f4049dfe563229bcd52ddb8f5704d4979cbc
SHA256

5aa334801bc8cbb237dce697204736b502a85b02311d43302e94fde3a2f6e53e
SHA512

63542f6419c53502850fdc7b9e31bc63e62cdd8fcf6ba9c83f62616be57fe33540a4b9f81871c8cdfaa32be1fc909d13df3afb007cdd2d3898c0992e49228187
SSDEEP

98304:vN9yp1NaIWBD64GcZ+GqznA5Uz2sDwzKFpWS2r:vzQPbGqzAKzUzW2

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
behavioral2/memory/2620-1-0x0000000000400000-0x0000000000C70000-memory.dmp	shurk_stealer
behavioral2/memory/2620-2-0x0000000000400000-0x0000000000C70000-memory.dmp	shurk_stealer
behavioral2/memory/2620-16-0x0000000000400000-0x0000000000C70000-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

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2620-1-0x0000000000400000-0x0000000000C70000-memory.dmp	upx
behavioral2/memory/2620-2-0x0000000000400000-0x0000000000C70000-memory.dmp	upx
behavioral2/memory/2620-16-0x0000000000400000-0x0000000000C70000-memory.dmp	upx

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
4	checkip.amazonaws.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1356	WMIC.exe

GoLang User-Agent 4 IoCs

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

description	flow	ioc
HTTP User-Agent header	6	Go-http-client/1.1
HTTP User-Agent header	21	Go-http-client/1.1
HTTP User-Agent header	24	Go-http-client/1.1
HTTP User-Agent header	31	Go-http-client/1.1

Suspicious use of AdjustPrivilegeToken 42 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1356	WMIC.exe
Token: SeSecurityPrivilege	1356	WMIC.exe
Token: SeTakeOwnershipPrivilege	1356	WMIC.exe
Token: SeLoadDriverPrivilege	1356	WMIC.exe
Token: SeSystemProfilePrivilege	1356	WMIC.exe
Token: SeSystemtimePrivilege	1356	WMIC.exe
Token: SeProfSingleProcessPrivilege	1356	WMIC.exe
Token: SeIncBasePriorityPrivilege	1356	WMIC.exe
Token: SeCreatePagefilePrivilege	1356	WMIC.exe
Token: SeBackupPrivilege	1356	WMIC.exe
Token: SeRestorePrivilege	1356	WMIC.exe
Token: SeShutdownPrivilege	1356	WMIC.exe
Token: SeDebugPrivilege	1356	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1356	WMIC.exe
Token: SeRemoteShutdownPrivilege	1356	WMIC.exe
Token: SeUndockPrivilege	1356	WMIC.exe
Token: SeManageVolumePrivilege	1356	WMIC.exe
Token: 33	1356	WMIC.exe
Token: 34	1356	WMIC.exe
Token: 35	1356	WMIC.exe
Token: 36	1356	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1356	WMIC.exe
Token: SeSecurityPrivilege	1356	WMIC.exe
Token: SeTakeOwnershipPrivilege	1356	WMIC.exe
Token: SeLoadDriverPrivilege	1356	WMIC.exe
Token: SeSystemProfilePrivilege	1356	WMIC.exe
Token: SeSystemtimePrivilege	1356	WMIC.exe
Token: SeProfSingleProcessPrivilege	1356	WMIC.exe
Token: SeIncBasePriorityPrivilege	1356	WMIC.exe
Token: SeCreatePagefilePrivilege	1356	WMIC.exe
Token: SeBackupPrivilege	1356	WMIC.exe
Token: SeRestorePrivilege	1356	WMIC.exe
Token: SeShutdownPrivilege	1356	WMIC.exe
Token: SeDebugPrivilege	1356	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1356	WMIC.exe
Token: SeRemoteShutdownPrivilege	1356	WMIC.exe
Token: SeUndockPrivilege	1356	WMIC.exe
Token: SeManageVolumePrivilege	1356	WMIC.exe
Token: 33	1356	WMIC.exe
Token: 34	1356	WMIC.exe
Token: 35	1356	WMIC.exe
Token: 36	1356	WMIC.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2620 wrote to memory of 3728	2620	Delux.exe	94
PID 2620 wrote to memory of 3728	2620	Delux.exe	94
PID 3728 wrote to memory of 1356	3728	cmd.exe	95
PID 3728 wrote to memory of 1356	3728	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\Delux.exe
"C:\Users\Admin\AppData\Local\Temp\Delux.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2620
- C:\Windows\system32\cmd.exe
  cmd /C "wmic path win32_VideoController get name"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3728
- - C:\Windows\System32\Wbem\WMIC.exe
    wmic path win32_VideoController get name
    3⤵
    - Detects videocard installed
    - Suspicious use of AdjustPrivilegeToken
    PID:1356

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

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Downloads

memory/2620-0-0x0000015B15690000-0x0000015B15D0F000-memory.dmp

Filesize
6.5MB

Download
memory/2620-1-0x0000000000400000-0x0000000000C70000-memory.dmp

Filesize
8.4MB

Download
memory/2620-2-0x0000000000400000-0x0000000000C70000-memory.dmp

Filesize
8.4MB

Download
memory/2620-16-0x0000000000400000-0x0000000000C70000-memory.dmp

Filesize
8.4MB

Download
memory/2620-17-0x0000015B15690000-0x0000015B15D0F000-memory.dmp

Filesize
6.5MB

Download