shurk | a2061e2151eab44f61c984475680cee2ae69325b4fa55aec57381f2390f97b44

Analysis

max time kernel
144s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
15-07-2023 15:57

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General

Target

f8.exe
Size

16.9MB
MD5

a2003bd97dc1213350922c80f30c1993
SHA1

4d69ba16bf5b456fd0f30bda7d4ca2f4acfc29d3
SHA256

a2061e2151eab44f61c984475680cee2ae69325b4fa55aec57381f2390f97b44
SHA512

73c6da611f124e6b31492ff9d25f6691d79d74596aeb7e877a6993d171b5b2715f536f3f965bbccc770472f02459e16f759f6ddb219a81410d1b86413aa871f1
SSDEEP

393216:0TQvE3PLny7Xq+4E0ZLlW3rBAtTkuk8LyKa1y3:0uQby7X/dALUVAz4n1

Score

10^/10

shurk infostealer spyware stealer

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/2472-134-0x0000000140000000-0x0000000140836000-memory.dmp	shurk_stealer
behavioral2/memory/2472-148-0x0000000140000000-0x0000000140836000-memory.dmp	shurk_stealer
behavioral2/memory/2472-149-0x000001D0F91A0000-0x000001D0FA24E000-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
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
6	checkip.amazonaws.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2240	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	10	Go-http-client/1.1
HTTP User-Agent header	20	Go-http-client/1.1

Suspicious use of AdjustPrivilegeToken 42 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2240	WMIC.exe
Token: SeSecurityPrivilege	2240	WMIC.exe
Token: SeTakeOwnershipPrivilege	2240	WMIC.exe
Token: SeLoadDriverPrivilege	2240	WMIC.exe
Token: SeSystemProfilePrivilege	2240	WMIC.exe
Token: SeSystemtimePrivilege	2240	WMIC.exe
Token: SeProfSingleProcessPrivilege	2240	WMIC.exe
Token: SeIncBasePriorityPrivilege	2240	WMIC.exe
Token: SeCreatePagefilePrivilege	2240	WMIC.exe
Token: SeBackupPrivilege	2240	WMIC.exe
Token: SeRestorePrivilege	2240	WMIC.exe
Token: SeShutdownPrivilege	2240	WMIC.exe
Token: SeDebugPrivilege	2240	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2240	WMIC.exe
Token: SeRemoteShutdownPrivilege	2240	WMIC.exe
Token: SeUndockPrivilege	2240	WMIC.exe
Token: SeManageVolumePrivilege	2240	WMIC.exe
Token: 33	2240	WMIC.exe
Token: 34	2240	WMIC.exe
Token: 35	2240	WMIC.exe
Token: 36	2240	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2240	WMIC.exe
Token: SeSecurityPrivilege	2240	WMIC.exe
Token: SeTakeOwnershipPrivilege	2240	WMIC.exe
Token: SeLoadDriverPrivilege	2240	WMIC.exe
Token: SeSystemProfilePrivilege	2240	WMIC.exe
Token: SeSystemtimePrivilege	2240	WMIC.exe
Token: SeProfSingleProcessPrivilege	2240	WMIC.exe
Token: SeIncBasePriorityPrivilege	2240	WMIC.exe
Token: SeCreatePagefilePrivilege	2240	WMIC.exe
Token: SeBackupPrivilege	2240	WMIC.exe
Token: SeRestorePrivilege	2240	WMIC.exe
Token: SeShutdownPrivilege	2240	WMIC.exe
Token: SeDebugPrivilege	2240	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2240	WMIC.exe
Token: SeRemoteShutdownPrivilege	2240	WMIC.exe
Token: SeUndockPrivilege	2240	WMIC.exe
Token: SeManageVolumePrivilege	2240	WMIC.exe
Token: 33	2240	WMIC.exe
Token: 34	2240	WMIC.exe
Token: 35	2240	WMIC.exe
Token: 36	2240	WMIC.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2472 wrote to memory of 2908	2472	f8.exe	88
PID 2472 wrote to memory of 2908	2472	f8.exe	88
PID 2908 wrote to memory of 2240	2908	cmd.exe	89
PID 2908 wrote to memory of 2240	2908	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\f8.exe
"C:\Users\Admin\AppData\Local\Temp\f8.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2472
- C:\Windows\system32\cmd.exe
  cmd /C "wmic path win32_VideoController get name"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2908
- - C:\Windows\System32\Wbem\WMIC.exe
    wmic path win32_VideoController get name
    3⤵
    - Detects videocard installed
    - Suspicious use of AdjustPrivilegeToken
    PID:2240

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/2472-133-0x000001D0F91A0000-0x000001D0FA24E000-memory.dmp

Filesize
16.7MB

Download
memory/2472-134-0x0000000140000000-0x0000000140836000-memory.dmp

Filesize
8.2MB

Download
memory/2472-148-0x0000000140000000-0x0000000140836000-memory.dmp

Filesize
8.2MB

Download
memory/2472-149-0x000001D0F91A0000-0x000001D0FA24E000-memory.dmp

Filesize
16.7MB

Download