zharkbot | 4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe

Analysis

max time kernel
73s
max time network
19s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
04-11-2024 02:20

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General

Target

4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe
Size

3.4MB
MD5

b45668e08c03024f2432ff332c319131
SHA1

4bef9109eaeace4107c47858eef2d9d3487e45f0
SHA256

4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe
SHA512

538c8471fc0313e68885d4d09140ec3e3374af3464af626195b6387a67b9bae9c3c9fd369d9dc7965decc182d13e8bbf95b4cf96b5ffc78af5d7904d59325bbc
SSDEEP

98304:MHKnK7qkC+8TMGHgWnvLBQ0YXpS3KZFc6LUARABDgAj:MqKYx9zu0YpSaZFcJA6BDga

Score

10^/10

zharkbot botnet discovery evasion themida trojan

Malware Config

Signatures

Detects ZharkBot payload 4 IoCs

ZharkBot is a botnet written C++.

resource	yara_rule
behavioral1/memory/1804-47-0x0000000000400000-0x0000000000455000-memory.dmp	zharkcore
behavioral1/memory/1804-43-0x0000000000400000-0x0000000000455000-memory.dmp	zharkcore
behavioral1/memory/1804-45-0x0000000000400000-0x0000000000455000-memory.dmp	zharkcore
behavioral1/memory/1804-42-0x0000000000400000-0x0000000000455000-memory.dmp	zharkcore

ZharkBot
ZharkBot is a botnet written C++.
botnet zharkbot
Zharkbot family
zharkbot

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ucloud.exe	Powershell.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ucloud.exe	Powershell.exe

Themida packer 2 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/memory/1740-24-0x0000000000A60000-0x00000000012DE000-memory.dmp	themida
behavioral1/memory/1740-56-0x0000000000A60000-0x00000000012DE000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1740 set thread context of 1804	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	31

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2248	1804	WerFault.exe	31

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Powershell.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe
1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe
1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe
3056	Powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe
Token: SeDebugPrivilege	3056	Powershell.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 1740 wrote to memory of 2972	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	30
PID 1740 wrote to memory of 2972	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	30
PID 1740 wrote to memory of 2972	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	30
PID 1740 wrote to memory of 2972	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	30
PID 1740 wrote to memory of 2972	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	30
PID 1740 wrote to memory of 2972	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	30
PID 1740 wrote to memory of 2972	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	30
PID 1740 wrote to memory of 1804	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	31
PID 1740 wrote to memory of 1804	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	31
PID 1740 wrote to memory of 1804	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	31
PID 1740 wrote to memory of 1804	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	31
PID 1740 wrote to memory of 1804	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	31
PID 1740 wrote to memory of 1804	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	31
PID 1740 wrote to memory of 1804	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	31
PID 1740 wrote to memory of 1804	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	31
PID 1740 wrote to memory of 1804	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	31
PID 1740 wrote to memory of 1804	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	31
PID 1740 wrote to memory of 1804	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	31
PID 1740 wrote to memory of 1804	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	31
PID 1740 wrote to memory of 1804	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	31
PID 1804 wrote to memory of 2248	1804	RegAsm.exe	32
PID 1804 wrote to memory of 2248	1804	RegAsm.exe	32
PID 1804 wrote to memory of 2248	1804	RegAsm.exe	32
PID 1804 wrote to memory of 2248	1804	RegAsm.exe	32
PID 1740 wrote to memory of 3056	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	33
PID 1740 wrote to memory of 3056	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	33
PID 1740 wrote to memory of 3056	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	33
PID 1740 wrote to memory of 3056	1740	4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe	33

C:\Users\Admin\AppData\Local\Temp\4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe
"C:\Users\Admin\AppData\Local\Temp\4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1740
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  PID:2972
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1804
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1804 -s 288
    3⤵
    - Program crash
    PID:2248
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe
  "Powershell" Copy-Item 'C:\Users\Admin\AppData\Local\Temp\4b5a876b1c230b28c0862d5f8158b3657016709855bf3329d8fea6cada3adbfe.exe' 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ucloud.exe'
  2⤵
  - Drops startup file
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3056

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1740-24-0x0000000000A60000-0x00000000012DE000-memory.dmp

Filesize
8.5MB

Download
memory/1740-15-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1740-2-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1740-0-0x0000000000A60000-0x00000000012DE000-memory.dmp

Filesize
8.5MB

Download
memory/1740-3-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1740-27-0x0000000075921000-0x0000000075922000-memory.dmp

Filesize
4KB

Download
memory/1740-10-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1740-25-0x0000000000A60000-0x00000000012DE000-memory.dmp

Filesize
8.5MB

Download
memory/1740-14-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1740-13-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1740-16-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1740-22-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1740-21-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1740-20-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1740-19-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1740-18-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1740-17-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1740-12-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1740-11-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1740-23-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1740-4-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1740-1-0x0000000075921000-0x0000000075922000-memory.dmp

Filesize
4KB

Download
memory/1740-5-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1740-28-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1740-29-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1740-30-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1740-33-0x0000000005530000-0x0000000005670000-memory.dmp

Filesize
1.2MB

Download
memory/1740-34-0x00000000004D0000-0x00000000004F2000-memory.dmp

Filesize
136KB

Download
memory/1740-57-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1740-56-0x0000000000A60000-0x00000000012DE000-memory.dmp

Filesize
8.5MB

Download
memory/1740-54-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1804-43-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download
memory/1804-45-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download
memory/1804-44-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1804-42-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download
memory/1804-39-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download
memory/1804-49-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1804-50-0x0000000075910000-0x0000000075A20000-memory.dmp

Filesize
1.1MB

Download
memory/1804-47-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download
memory/1804-37-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download
memory/1804-35-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download