gandcrab | 6df64a0a921bd65006968d7eb146f7ceb60ffc1345575d39edec0eded41eb4fe

Resubmissions

23-02-2023 18:39

230223-xazw9sgh45 10

19-02-2023 04:44

230219-fctplaeg27 10

Analysis

max time kernel
150s
max time network
153s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
23-02-2023 18:39

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General

Target

2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
Size

6.0MB
MD5

7f97b34a113170d02ff8008c2bbc7745
SHA1

fe00b8cfc0896d6d23ff3628af8c406a7683d707
SHA256

6df64a0a921bd65006968d7eb146f7ceb60ffc1345575d39edec0eded41eb4fe
SHA512

a899eb8481c02d0c983c7761ca9962ffdea22354cdef6cefeadbdf0ac96d43a54c02ea72e89b8b5c2bdefed38ecdd960a8d267e3fc15545286844baf40ac9e93
SSDEEP

49152:LwLwHt4Ihqew+96PoBjYs5ngToDEZwTFgN+1TtI1VjFF3PBTqJQkYUjeAb3WUpPb:L9fhqezRobVjFyEUqA6Sp+ZIogCxfwis

Score

10^/10

gandcrab backdoor persistence ransomware

Malware Config

Signatures

GandCrab payload 4 IoCs

resource	yara_rule
behavioral1/memory/1304-55-0x0000000000400000-0x000000000043C000-memory.dmp	family_gandcrab
behavioral1/memory/1304-56-0x0000000000280000-0x0000000000297000-memory.dmp	family_gandcrab
behavioral1/memory/1304-63-0x0000000000400000-0x000000000043C000-memory.dmp	family_gandcrab
behavioral1/memory/1304-65-0x0000000000280000-0x0000000000297000-memory.dmp	family_gandcrab

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

Unexpected DNS network traffic destination 48 IoCs

Network traffic to other servers than the configured DNS servers was detected on the DNS port.

description	ioc
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67
Destination IP	35.205.61.67

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\npwamkhmefi = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\ylxnks.exe\""	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe

Enumerates connected drives 3 TTPs 24 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)	\??\S:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
File opened (read-only)	\??\W:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
File opened (read-only)	\??\E:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
File opened (read-only)	\??\F:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
File opened (read-only)	\??\H:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
File opened (read-only)	\??\O:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
File opened (read-only)	\??\P:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
File opened (read-only)	\??\K:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
File opened (read-only)	\??\N:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
File opened (read-only)	\??\R:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
File opened (read-only)	\??\Y:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
File opened (read-only)	\??\Z:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
File opened (read-only)	\??\G:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
File opened (read-only)	\??\J:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
File opened (read-only)	\??\L:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
File opened (read-only)	\??\Q:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
File opened (read-only)	\??\V:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
File opened (read-only)	\??\U:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
File opened (read-only)	\??\X:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
File opened (read-only)	\??\A:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
File opened (read-only)	\??\B:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
File opened (read-only)	\??\I:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
File opened (read-only)	\??\M:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
File opened (read-only)	\??\T:	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.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	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 1304 wrote to memory of 1908	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	28
PID 1304 wrote to memory of 1908	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	28
PID 1304 wrote to memory of 1908	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	28
PID 1304 wrote to memory of 1908	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	28
PID 1304 wrote to memory of 1808	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	30
PID 1304 wrote to memory of 1808	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	30
PID 1304 wrote to memory of 1808	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	30
PID 1304 wrote to memory of 1808	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	30
PID 1304 wrote to memory of 576	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	32
PID 1304 wrote to memory of 576	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	32
PID 1304 wrote to memory of 576	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	32
PID 1304 wrote to memory of 576	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	32
PID 1304 wrote to memory of 1180	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	34
PID 1304 wrote to memory of 1180	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	34
PID 1304 wrote to memory of 1180	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	34
PID 1304 wrote to memory of 1180	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	34
PID 1304 wrote to memory of 780	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	36
PID 1304 wrote to memory of 780	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	36
PID 1304 wrote to memory of 780	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	36
PID 1304 wrote to memory of 780	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	36
PID 1304 wrote to memory of 1868	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	38
PID 1304 wrote to memory of 1868	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	38
PID 1304 wrote to memory of 1868	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	38
PID 1304 wrote to memory of 1868	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	38
PID 1304 wrote to memory of 1764	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	40
PID 1304 wrote to memory of 1764	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	40
PID 1304 wrote to memory of 1764	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	40
PID 1304 wrote to memory of 1764	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	40
PID 1304 wrote to memory of 1864	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	42
PID 1304 wrote to memory of 1864	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	42
PID 1304 wrote to memory of 1864	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	42
PID 1304 wrote to memory of 1864	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	42
PID 1304 wrote to memory of 360	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	44
PID 1304 wrote to memory of 360	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	44
PID 1304 wrote to memory of 360	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	44
PID 1304 wrote to memory of 360	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	44
PID 1304 wrote to memory of 908	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	46
PID 1304 wrote to memory of 908	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	46
PID 1304 wrote to memory of 908	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	46
PID 1304 wrote to memory of 908	1304	2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe	46

C:\Users\Admin\AppData\Local\Temp\2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2023-02-19_7f97b34a113170d02ff8008c2bbc7745_wannacry.exe"
1⤵
- Adds Run key to start application
- Enumerates connected drives
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1304
- C:\Windows\SysWOW64\nslookup.exe
  nslookup carder.bit ns1.wowservers.ru
  2⤵
  PID:1908
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns2.wowservers.ru
  2⤵
  PID:1808
- C:\Windows\SysWOW64\nslookup.exe
  nslookup carder.bit ns2.wowservers.ru
  2⤵
  PID:576
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns1.wowservers.ru
  2⤵
  PID:1180
- C:\Windows\SysWOW64\nslookup.exe
  nslookup carder.bit ns1.wowservers.ru
  2⤵
  PID:780
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns2.wowservers.ru
  2⤵
  PID:1868
- C:\Windows\SysWOW64\nslookup.exe
  nslookup carder.bit ns2.wowservers.ru
  2⤵
  PID:1764
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns1.wowservers.ru
  2⤵
  PID:1864
- C:\Windows\SysWOW64\nslookup.exe
  nslookup carder.bit ns1.wowservers.ru
  2⤵
  PID:360
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns2.wowservers.ru
  2⤵
  PID:908

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1304-54-0x0000000000220000-0x000000000023B000-memory.dmp

Filesize
108KB

Download
memory/1304-55-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/1304-56-0x0000000000280000-0x0000000000297000-memory.dmp

Filesize
92KB

Download
memory/1304-63-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/1304-65-0x0000000000280000-0x0000000000297000-memory.dmp

Filesize
92KB

Download