gandcrab | ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99

Analysis

max time kernel
116s
max time network
117s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
24-11-2024 19:19

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General

Target

ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
Size

240KB
MD5

6aff744d9364e621e071a92aff7ebd4f
SHA1

2e4648fb6542e0ca4b3d79ce10c4a6572bbc621b
SHA256

ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99
SHA512

1ea14073a821450f10424d79296de58da354fae3cc9910eb42fed60614d2d0710c697a0b18176c8263d08dc837c0ecb6de9a3d3b31accd80512ac15afd0ed0b9
SSDEEP

3072:LYHVHd2NwMqqDL2/mr3IdE8we0Avu5r++ygLIaa4jRv9OtNZpHkc:LycqqDL6oREzZpEc

Score

10^/10

gandcrab backdoor discovery persistence ransomware upx

Malware Config

Signatures

GandCrab payload 2 IoCs

resource	yara_rule
behavioral2/memory/880-0-0x0000000000400000-0x000000000043C000-memory.dmp	family_gandcrab
behavioral2/memory/880-4-0x0000000000400000-0x000000000043C000-memory.dmp	family_gandcrab

Gandcrab
Gandcrab is a Trojan horse that encrypts files on a computer.
ransomware backdoor gandcrab
Gandcrab family
gandcrab

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\yhhxbbeqnue = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe"	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\A:	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
File opened (read-only)	\??\J:	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
File opened (read-only)	\??\Z:	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
File opened (read-only)	\??\B:	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
File opened (read-only)	\??\P:	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
File opened (read-only)	\??\T:	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
File opened (read-only)	\??\W:	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
File opened (read-only)	\??\Y:	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
File opened (read-only)	\??\E:	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
File opened (read-only)	\??\G:	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
File opened (read-only)	\??\H:	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
File opened (read-only)	\??\K:	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
File opened (read-only)	\??\M:	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
File opened (read-only)	\??\R:	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
File opened (read-only)	\??\S:	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
File opened (read-only)	\??\V:	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
File opened (read-only)	\??\I:	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
File opened (read-only)	\??\L:	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
File opened (read-only)	\??\N:	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
File opened (read-only)	\??\O:	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
File opened (read-only)	\??\Q:	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
File opened (read-only)	\??\U:	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
File opened (read-only)	\??\X:	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/880-0-0x0000000000400000-0x000000000043C000-memory.dmp	upx
behavioral2/memory/880-4-0x0000000000400000-0x000000000043C000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 13 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	nslookup.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nslookup.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nslookup.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nslookup.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nslookup.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nslookup.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nslookup.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nslookup.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nslookup.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nslookup.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nslookup.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nslookup.exe

Checks processor information in registry 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 880 wrote to memory of 4676	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	82
PID 880 wrote to memory of 4676	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	82
PID 880 wrote to memory of 4676	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	82
PID 880 wrote to memory of 4472	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	91
PID 880 wrote to memory of 4472	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	91
PID 880 wrote to memory of 4472	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	91
PID 880 wrote to memory of 1048	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	93
PID 880 wrote to memory of 1048	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	93
PID 880 wrote to memory of 1048	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	93
PID 880 wrote to memory of 1740	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	97
PID 880 wrote to memory of 1740	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	97
PID 880 wrote to memory of 1740	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	97
PID 880 wrote to memory of 2144	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	99
PID 880 wrote to memory of 2144	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	99
PID 880 wrote to memory of 2144	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	99
PID 880 wrote to memory of 4376	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	101
PID 880 wrote to memory of 4376	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	101
PID 880 wrote to memory of 4376	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	101
PID 880 wrote to memory of 5080	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	103
PID 880 wrote to memory of 5080	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	103
PID 880 wrote to memory of 5080	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	103
PID 880 wrote to memory of 3964	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	105
PID 880 wrote to memory of 3964	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	105
PID 880 wrote to memory of 3964	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	105
PID 880 wrote to memory of 2784	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	107
PID 880 wrote to memory of 2784	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	107
PID 880 wrote to memory of 2784	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	107
PID 880 wrote to memory of 4900	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	109
PID 880 wrote to memory of 4900	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	109
PID 880 wrote to memory of 4900	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	109
PID 880 wrote to memory of 3752	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	111
PID 880 wrote to memory of 3752	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	111
PID 880 wrote to memory of 3752	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	111
PID 880 wrote to memory of 4412	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	113
PID 880 wrote to memory of 4412	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	113
PID 880 wrote to memory of 4412	880	ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe	113

C:\Users\Admin\AppData\Local\Temp\ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe
"C:\Users\Admin\AppData\Local\Temp\ef55360b0b8e60b9a4166fd0f0a39ee42cbfd6eb1dcbba72b0be83137cd80b99.exe"
1⤵
- Adds Run key to start application
- Enumerates connected drives
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:880
- C:\Windows\SysWOW64\nslookup.exe
  nslookup nomoreransom.bit dns1.soprodns.ru
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4676
- C:\Windows\SysWOW64\nslookup.exe
  nslookup emsisoft.bit dns1.soprodns.ru
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4472
- C:\Windows\SysWOW64\nslookup.exe
  nslookup gandcrab.bit dns1.soprodns.ru
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1048
- C:\Windows\SysWOW64\nslookup.exe
  nslookup nomoreransom.bit dns1.soprodns.ru
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1740
- C:\Windows\SysWOW64\nslookup.exe
  nslookup emsisoft.bit dns1.soprodns.ru
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2144
- C:\Windows\SysWOW64\nslookup.exe
  nslookup gandcrab.bit dns1.soprodns.ru
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4376
- C:\Windows\SysWOW64\nslookup.exe
  nslookup nomoreransom.bit dns1.soprodns.ru
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5080
- C:\Windows\SysWOW64\nslookup.exe
  nslookup emsisoft.bit dns1.soprodns.ru
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3964
- C:\Windows\SysWOW64\nslookup.exe
  nslookup gandcrab.bit dns1.soprodns.ru
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2784
- C:\Windows\SysWOW64\nslookup.exe
  nslookup nomoreransom.bit dns1.soprodns.ru
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4900
- C:\Windows\SysWOW64\nslookup.exe
  nslookup emsisoft.bit dns1.soprodns.ru
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3752
- C:\Windows\SysWOW64\nslookup.exe
  nslookup gandcrab.bit dns1.soprodns.ru
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4412

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/880-0-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/880-4-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download