shurk | 1d386f96ab141c7bd7dfb8dfe9e747143670996a7b3d5a4c224c34e8a5973379

Analysis

max time kernel
149s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
14-07-2023 13:10

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General

Target

fb1b85b57041bc462f876726f8a16659.exe
Size

6.6MB
MD5

fb1b85b57041bc462f876726f8a16659
SHA1

c2b93b37e4d2d770dc4c6b33882d9217aebe3729
SHA256

1d386f96ab141c7bd7dfb8dfe9e747143670996a7b3d5a4c224c34e8a5973379
SHA512

1ee64d93b2c36ba2d8ada0f67e7a0630408d5a5cf4ebbbb47dcbabc6d6e9b5e896ac96e902b56f5b0a7423e0da9a1703a213a6bf276b8d4d55b8da080548cfaf
SSDEEP

98304:F0NytytRQ+MK8dkb8BET69lUz2sDwzKFpWS2r:F0NytytRQ+D8dkbAEG9OzUzW2

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
behavioral2/memory/4884-135-0x0000000000400000-0x0000000000C70000-memory.dmp	shurk_stealer
behavioral2/memory/4884-149-0x0000000000400000-0x0000000000C70000-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
T1081

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4884-134-0x0000000000400000-0x0000000000C70000-memory.dmp	upx
behavioral2/memory/4884-135-0x0000000000400000-0x0000000000C70000-memory.dmp	upx
behavioral2/memory/4884-149-0x0000000000400000-0x0000000000C70000-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
5	checkip.amazonaws.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3924	WMIC.exe

GoLang User-Agent 3 IoCs

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

description	flow	ioc
HTTP User-Agent header	10	Go-http-client/1.1
HTTP User-Agent header	13	Go-http-client/1.1
HTTP User-Agent header	8	Go-http-client/1.1

Suspicious use of AdjustPrivilegeToken 42 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	3924	WMIC.exe
Token: SeSecurityPrivilege	3924	WMIC.exe
Token: SeTakeOwnershipPrivilege	3924	WMIC.exe
Token: SeLoadDriverPrivilege	3924	WMIC.exe
Token: SeSystemProfilePrivilege	3924	WMIC.exe
Token: SeSystemtimePrivilege	3924	WMIC.exe
Token: SeProfSingleProcessPrivilege	3924	WMIC.exe
Token: SeIncBasePriorityPrivilege	3924	WMIC.exe
Token: SeCreatePagefilePrivilege	3924	WMIC.exe
Token: SeBackupPrivilege	3924	WMIC.exe
Token: SeRestorePrivilege	3924	WMIC.exe
Token: SeShutdownPrivilege	3924	WMIC.exe
Token: SeDebugPrivilege	3924	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3924	WMIC.exe
Token: SeRemoteShutdownPrivilege	3924	WMIC.exe
Token: SeUndockPrivilege	3924	WMIC.exe
Token: SeManageVolumePrivilege	3924	WMIC.exe
Token: 33	3924	WMIC.exe
Token: 34	3924	WMIC.exe
Token: 35	3924	WMIC.exe
Token: 36	3924	WMIC.exe
Token: SeIncreaseQuotaPrivilege	3924	WMIC.exe
Token: SeSecurityPrivilege	3924	WMIC.exe
Token: SeTakeOwnershipPrivilege	3924	WMIC.exe
Token: SeLoadDriverPrivilege	3924	WMIC.exe
Token: SeSystemProfilePrivilege	3924	WMIC.exe
Token: SeSystemtimePrivilege	3924	WMIC.exe
Token: SeProfSingleProcessPrivilege	3924	WMIC.exe
Token: SeIncBasePriorityPrivilege	3924	WMIC.exe
Token: SeCreatePagefilePrivilege	3924	WMIC.exe
Token: SeBackupPrivilege	3924	WMIC.exe
Token: SeRestorePrivilege	3924	WMIC.exe
Token: SeShutdownPrivilege	3924	WMIC.exe
Token: SeDebugPrivilege	3924	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3924	WMIC.exe
Token: SeRemoteShutdownPrivilege	3924	WMIC.exe
Token: SeUndockPrivilege	3924	WMIC.exe
Token: SeManageVolumePrivilege	3924	WMIC.exe
Token: 33	3924	WMIC.exe
Token: 34	3924	WMIC.exe
Token: 35	3924	WMIC.exe
Token: 36	3924	WMIC.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4884 wrote to memory of 4448	4884	fb1b85b57041bc462f876726f8a16659.exe	87
PID 4884 wrote to memory of 4448	4884	fb1b85b57041bc462f876726f8a16659.exe	87
PID 4448 wrote to memory of 3924	4448	cmd.exe	88
PID 4448 wrote to memory of 3924	4448	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\fb1b85b57041bc462f876726f8a16659.exe
"C:\Users\Admin\AppData\Local\Temp\fb1b85b57041bc462f876726f8a16659.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4884
- C:\Windows\system32\cmd.exe
  cmd /C "wmic path win32_VideoController get name"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4448
- - C:\Windows\System32\Wbem\WMIC.exe
    wmic path win32_VideoController get name
    3⤵
    - Detects videocard installed
    - Suspicious use of AdjustPrivilegeToken
    PID:3924

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/4884-133-0x000001F8507C0000-0x000001F850E3F000-memory.dmp

Filesize
6.5MB

Download
memory/4884-134-0x0000000000400000-0x0000000000C70000-memory.dmp

Filesize
8.4MB

Download
memory/4884-135-0x0000000000400000-0x0000000000C70000-memory.dmp

Filesize
8.4MB

Download
memory/4884-149-0x0000000000400000-0x0000000000C70000-memory.dmp

Filesize
8.4MB

Download
memory/4884-150-0x000001F8507C0000-0x000001F850E3F000-memory.dmp

Filesize
6.5MB

Download