shurk | 5aa334801bc8cbb237dce697204736b502a85b02311d43302e94fde3a2f6e53e

Analysis

max time kernel
15s
max time network
17s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-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 2 IoCs

Processes:

resource yara_rule

behavioral1/memory/2936-2-0x00000000029E0000-0x0000000003250000-memory.dmp shurk_stealer
behavioral1/memory/2936-12-0x00000000029E0000-0x0000000003250000-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 2 IoCs
Detects executables packed with UPX/modified UPX open source packer.
upx

Processes:

resource yara_rule

behavioral1/memory/2936-2-0x00000000029E0000-0x0000000003250000-memory.dmp upx
behavioral1/memory/2936-12-0x00000000029E0000-0x0000000003250000-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.

Processes:

flow ioc

2 checkip.amazonaws.com
Detects videocard installed 1 TTPs 1 IoCs
Uses WMIC.exe to determine videocard installed.

System Information Discovery
T1082

Processes:

WMIC.exe

pid process

2544 WMIC.exe
GoLang User-Agent 4 IoCs
Uses default user-agent string defined by GoLang HTTP packages.

Processes:

description flow ioc

HTTP User-Agent header 5 Go-http-client/1.1
HTTP User-Agent header 6 Go-http-client/1.1
HTTP User-Agent header 7 Go-http-client/1.1
HTTP User-Agent header 3 Go-http-client/1.1

resource	yara_rule
behavioral1/memory/2936-2-0x00000000029E0000-0x0000000003250000-memory.dmp	shurk_stealer
behavioral1/memory/2936-12-0x00000000029E0000-0x0000000003250000-memory.dmp	shurk_stealer

resource	yara_rule
behavioral1/memory/2936-2-0x00000000029E0000-0x0000000003250000-memory.dmp	upx
behavioral1/memory/2936-12-0x00000000029E0000-0x0000000003250000-memory.dmp	upx

flow	ioc
2	checkip.amazonaws.com

pid	process
2544	WMIC.exe

description	flow	ioc
HTTP User-Agent header	5	Go-http-client/1.1
HTTP User-Agent header	6	Go-http-client/1.1
HTTP User-Agent header	7	Go-http-client/1.1
HTTP User-Agent header	3	Go-http-client/1.1

Suspicious use of AdjustPrivilegeToken 40 IoCs

Processes:

WMIC.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	2544	WMIC.exe
Token: SeSecurityPrivilege	2544	WMIC.exe
Token: SeTakeOwnershipPrivilege	2544	WMIC.exe
Token: SeLoadDriverPrivilege	2544	WMIC.exe
Token: SeSystemProfilePrivilege	2544	WMIC.exe
Token: SeSystemtimePrivilege	2544	WMIC.exe
Token: SeProfSingleProcessPrivilege	2544	WMIC.exe
Token: SeIncBasePriorityPrivilege	2544	WMIC.exe
Token: SeCreatePagefilePrivilege	2544	WMIC.exe
Token: SeBackupPrivilege	2544	WMIC.exe
Token: SeRestorePrivilege	2544	WMIC.exe
Token: SeShutdownPrivilege	2544	WMIC.exe
Token: SeDebugPrivilege	2544	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2544	WMIC.exe
Token: SeRemoteShutdownPrivilege	2544	WMIC.exe
Token: SeUndockPrivilege	2544	WMIC.exe
Token: SeManageVolumePrivilege	2544	WMIC.exe
Token: 33	2544	WMIC.exe
Token: 34	2544	WMIC.exe
Token: 35	2544	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2544	WMIC.exe
Token: SeSecurityPrivilege	2544	WMIC.exe
Token: SeTakeOwnershipPrivilege	2544	WMIC.exe
Token: SeLoadDriverPrivilege	2544	WMIC.exe
Token: SeSystemProfilePrivilege	2544	WMIC.exe
Token: SeSystemtimePrivilege	2544	WMIC.exe
Token: SeProfSingleProcessPrivilege	2544	WMIC.exe
Token: SeIncBasePriorityPrivilege	2544	WMIC.exe
Token: SeCreatePagefilePrivilege	2544	WMIC.exe
Token: SeBackupPrivilege	2544	WMIC.exe
Token: SeRestorePrivilege	2544	WMIC.exe
Token: SeShutdownPrivilege	2544	WMIC.exe
Token: SeDebugPrivilege	2544	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2544	WMIC.exe
Token: SeRemoteShutdownPrivilege	2544	WMIC.exe
Token: SeUndockPrivilege	2544	WMIC.exe
Token: SeManageVolumePrivilege	2544	WMIC.exe
Token: 33	2544	WMIC.exe
Token: 34	2544	WMIC.exe
Token: 35	2544	WMIC.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Delux.execmd.exe

description	pid	process	target process
PID 2936 wrote to memory of 2576	2936	Delux.exe	cmd.exe
PID 2936 wrote to memory of 2576	2936	Delux.exe	cmd.exe
PID 2936 wrote to memory of 2576	2936	Delux.exe	cmd.exe
PID 2576 wrote to memory of 2544	2576	cmd.exe	WMIC.exe
PID 2576 wrote to memory of 2544	2576	cmd.exe	WMIC.exe
PID 2576 wrote to memory of 2544	2576	cmd.exe	WMIC.exe

C:\Users\Admin\AppData\Local\Temp\Delux.exe
"C:\Users\Admin\AppData\Local\Temp\Delux.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2936

C:\Windows\system32\cmd.exe
cmd /C "wmic path win32_VideoController get name"
2⤵
- Suspicious use of WriteProcessMemory
PID:2576

C:\Windows\System32\Wbem\WMIC.exe
wmic path win32_VideoController get name
3⤵
- Detects videocard installed
- Suspicious use of AdjustPrivilegeToken
PID:2544

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

memory/2936-0-0x0000000002360000-0x00000000029DF000-memory.dmp

Filesize
6.5MB

Download
memory/2936-2-0x00000000029E0000-0x0000000003250000-memory.dmp

Filesize
8.4MB

Download
memory/2936-12-0x00000000029E0000-0x0000000003250000-memory.dmp

Filesize
8.4MB

Download
memory/2936-13-0x0000000002360000-0x00000000029DF000-memory.dmp

Filesize
6.5MB

Download