gandcrab | b4a906020c2b6f392f9b4d1efe350091a3330d91cee9e6d52858885b4eb30868

Analysis

max time kernel
152s
max time network
162s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
22-12-2023 02:41

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General

Target

54beec0f1e41b3a17c99eebef9760273.exe
Size

204KB
MD5

54beec0f1e41b3a17c99eebef9760273
SHA1

2a7435e6c889d134713148e99b409beb58e034ed
SHA256

b4a906020c2b6f392f9b4d1efe350091a3330d91cee9e6d52858885b4eb30868
SHA512

8df65181934b5d225618ff59c80120d96828158265f077a6e341ecc50bc89b4ab8440fbcdcce23cf0452419511ad4b76967545c6cf6c5502844de00c427647e9
SSDEEP

3072:POaGa4yfWQ/TGvb2biw1ywJPY9BDhAAKAg2OLVFUtzhJ:Wa34YZybc1yeYCAKhUhJ

Score

10^/10

gandcrab backdoor persistence ransomware

Malware Config

Signatures

GandCrab payload 4 IoCs

resource	yara_rule
behavioral1/memory/2172-4-0x0000000000400000-0x00000000022E2000-memory.dmp	family_gandcrab
behavioral1/memory/2172-3-0x0000000000220000-0x0000000000237000-memory.dmp	family_gandcrab
behavioral1/memory/2172-11-0x0000000000400000-0x00000000022E2000-memory.dmp	family_gandcrab
behavioral1/memory/2172-14-0x0000000000220000-0x0000000000237000-memory.dmp	family_gandcrab

Gandcrab
Gandcrab is a Trojan horse that encrypts files on a computer.
ransomware backdoor 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-1-5-21-1603059206-2004189698-4139800220-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\dwukygvangk = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\iudoxf.exe\""	54beec0f1e41b3a17c99eebef9760273.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)	\??\S:	54beec0f1e41b3a17c99eebef9760273.exe
File opened (read-only)	\??\W:	54beec0f1e41b3a17c99eebef9760273.exe
File opened (read-only)	\??\Z:	54beec0f1e41b3a17c99eebef9760273.exe
File opened (read-only)	\??\E:	54beec0f1e41b3a17c99eebef9760273.exe
File opened (read-only)	\??\H:	54beec0f1e41b3a17c99eebef9760273.exe
File opened (read-only)	\??\I:	54beec0f1e41b3a17c99eebef9760273.exe
File opened (read-only)	\??\K:	54beec0f1e41b3a17c99eebef9760273.exe
File opened (read-only)	\??\L:	54beec0f1e41b3a17c99eebef9760273.exe
File opened (read-only)	\??\N:	54beec0f1e41b3a17c99eebef9760273.exe
File opened (read-only)	\??\O:	54beec0f1e41b3a17c99eebef9760273.exe
File opened (read-only)	\??\Q:	54beec0f1e41b3a17c99eebef9760273.exe
File opened (read-only)	\??\A:	54beec0f1e41b3a17c99eebef9760273.exe
File opened (read-only)	\??\B:	54beec0f1e41b3a17c99eebef9760273.exe
File opened (read-only)	\??\J:	54beec0f1e41b3a17c99eebef9760273.exe
File opened (read-only)	\??\T:	54beec0f1e41b3a17c99eebef9760273.exe
File opened (read-only)	\??\Y:	54beec0f1e41b3a17c99eebef9760273.exe
File opened (read-only)	\??\U:	54beec0f1e41b3a17c99eebef9760273.exe
File opened (read-only)	\??\R:	54beec0f1e41b3a17c99eebef9760273.exe
File opened (read-only)	\??\V:	54beec0f1e41b3a17c99eebef9760273.exe
File opened (read-only)	\??\X:	54beec0f1e41b3a17c99eebef9760273.exe
File opened (read-only)	\??\G:	54beec0f1e41b3a17c99eebef9760273.exe
File opened (read-only)	\??\M:	54beec0f1e41b3a17c99eebef9760273.exe
File opened (read-only)	\??\P:	54beec0f1e41b3a17c99eebef9760273.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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	54beec0f1e41b3a17c99eebef9760273.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	54beec0f1e41b3a17c99eebef9760273.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	54beec0f1e41b3a17c99eebef9760273.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2172	54beec0f1e41b3a17c99eebef9760273.exe
2172	54beec0f1e41b3a17c99eebef9760273.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2172 wrote to memory of 2644	2172	54beec0f1e41b3a17c99eebef9760273.exe	29
PID 2172 wrote to memory of 2644	2172	54beec0f1e41b3a17c99eebef9760273.exe	29
PID 2172 wrote to memory of 2644	2172	54beec0f1e41b3a17c99eebef9760273.exe	29
PID 2172 wrote to memory of 2644	2172	54beec0f1e41b3a17c99eebef9760273.exe	29
PID 2172 wrote to memory of 2520	2172	54beec0f1e41b3a17c99eebef9760273.exe	32
PID 2172 wrote to memory of 2520	2172	54beec0f1e41b3a17c99eebef9760273.exe	32
PID 2172 wrote to memory of 2520	2172	54beec0f1e41b3a17c99eebef9760273.exe	32
PID 2172 wrote to memory of 2520	2172	54beec0f1e41b3a17c99eebef9760273.exe	32
PID 2172 wrote to memory of 2444	2172	54beec0f1e41b3a17c99eebef9760273.exe	34
PID 2172 wrote to memory of 2444	2172	54beec0f1e41b3a17c99eebef9760273.exe	34
PID 2172 wrote to memory of 2444	2172	54beec0f1e41b3a17c99eebef9760273.exe	34
PID 2172 wrote to memory of 2444	2172	54beec0f1e41b3a17c99eebef9760273.exe	34
PID 2172 wrote to memory of 2696	2172	54beec0f1e41b3a17c99eebef9760273.exe	36
PID 2172 wrote to memory of 2696	2172	54beec0f1e41b3a17c99eebef9760273.exe	36
PID 2172 wrote to memory of 2696	2172	54beec0f1e41b3a17c99eebef9760273.exe	36
PID 2172 wrote to memory of 2696	2172	54beec0f1e41b3a17c99eebef9760273.exe	36
PID 2172 wrote to memory of 2440	2172	54beec0f1e41b3a17c99eebef9760273.exe	38
PID 2172 wrote to memory of 2440	2172	54beec0f1e41b3a17c99eebef9760273.exe	38
PID 2172 wrote to memory of 2440	2172	54beec0f1e41b3a17c99eebef9760273.exe	38
PID 2172 wrote to memory of 2440	2172	54beec0f1e41b3a17c99eebef9760273.exe	38
PID 2172 wrote to memory of 548	2172	54beec0f1e41b3a17c99eebef9760273.exe	40
PID 2172 wrote to memory of 548	2172	54beec0f1e41b3a17c99eebef9760273.exe	40
PID 2172 wrote to memory of 548	2172	54beec0f1e41b3a17c99eebef9760273.exe	40
PID 2172 wrote to memory of 548	2172	54beec0f1e41b3a17c99eebef9760273.exe	40
PID 2172 wrote to memory of 1716	2172	54beec0f1e41b3a17c99eebef9760273.exe	44
PID 2172 wrote to memory of 1716	2172	54beec0f1e41b3a17c99eebef9760273.exe	44
PID 2172 wrote to memory of 1716	2172	54beec0f1e41b3a17c99eebef9760273.exe	44
PID 2172 wrote to memory of 1716	2172	54beec0f1e41b3a17c99eebef9760273.exe	44
PID 2172 wrote to memory of 2628	2172	54beec0f1e41b3a17c99eebef9760273.exe	46
PID 2172 wrote to memory of 2628	2172	54beec0f1e41b3a17c99eebef9760273.exe	46
PID 2172 wrote to memory of 2628	2172	54beec0f1e41b3a17c99eebef9760273.exe	46
PID 2172 wrote to memory of 2628	2172	54beec0f1e41b3a17c99eebef9760273.exe	46
PID 2172 wrote to memory of 3024	2172	54beec0f1e41b3a17c99eebef9760273.exe	48
PID 2172 wrote to memory of 3024	2172	54beec0f1e41b3a17c99eebef9760273.exe	48
PID 2172 wrote to memory of 3024	2172	54beec0f1e41b3a17c99eebef9760273.exe	48
PID 2172 wrote to memory of 3024	2172	54beec0f1e41b3a17c99eebef9760273.exe	48
PID 2172 wrote to memory of 1088	2172	54beec0f1e41b3a17c99eebef9760273.exe	50
PID 2172 wrote to memory of 1088	2172	54beec0f1e41b3a17c99eebef9760273.exe	50
PID 2172 wrote to memory of 1088	2172	54beec0f1e41b3a17c99eebef9760273.exe	50
PID 2172 wrote to memory of 1088	2172	54beec0f1e41b3a17c99eebef9760273.exe	50
PID 2172 wrote to memory of 2184	2172	54beec0f1e41b3a17c99eebef9760273.exe	52
PID 2172 wrote to memory of 2184	2172	54beec0f1e41b3a17c99eebef9760273.exe	52
PID 2172 wrote to memory of 2184	2172	54beec0f1e41b3a17c99eebef9760273.exe	52
PID 2172 wrote to memory of 2184	2172	54beec0f1e41b3a17c99eebef9760273.exe	52
PID 2172 wrote to memory of 2028	2172	54beec0f1e41b3a17c99eebef9760273.exe	54
PID 2172 wrote to memory of 2028	2172	54beec0f1e41b3a17c99eebef9760273.exe	54
PID 2172 wrote to memory of 2028	2172	54beec0f1e41b3a17c99eebef9760273.exe	54
PID 2172 wrote to memory of 2028	2172	54beec0f1e41b3a17c99eebef9760273.exe	54
PID 2172 wrote to memory of 2036	2172	54beec0f1e41b3a17c99eebef9760273.exe	56
PID 2172 wrote to memory of 2036	2172	54beec0f1e41b3a17c99eebef9760273.exe	56
PID 2172 wrote to memory of 2036	2172	54beec0f1e41b3a17c99eebef9760273.exe	56
PID 2172 wrote to memory of 2036	2172	54beec0f1e41b3a17c99eebef9760273.exe	56
PID 2172 wrote to memory of 2164	2172	54beec0f1e41b3a17c99eebef9760273.exe	58
PID 2172 wrote to memory of 2164	2172	54beec0f1e41b3a17c99eebef9760273.exe	58
PID 2172 wrote to memory of 2164	2172	54beec0f1e41b3a17c99eebef9760273.exe	58
PID 2172 wrote to memory of 2164	2172	54beec0f1e41b3a17c99eebef9760273.exe	58
PID 2172 wrote to memory of 1652	2172	54beec0f1e41b3a17c99eebef9760273.exe	60
PID 2172 wrote to memory of 1652	2172	54beec0f1e41b3a17c99eebef9760273.exe	60
PID 2172 wrote to memory of 1652	2172	54beec0f1e41b3a17c99eebef9760273.exe	60
PID 2172 wrote to memory of 1652	2172	54beec0f1e41b3a17c99eebef9760273.exe	60
PID 2172 wrote to memory of 2284	2172	54beec0f1e41b3a17c99eebef9760273.exe	62
PID 2172 wrote to memory of 2284	2172	54beec0f1e41b3a17c99eebef9760273.exe	62
PID 2172 wrote to memory of 2284	2172	54beec0f1e41b3a17c99eebef9760273.exe	62
PID 2172 wrote to memory of 2284	2172	54beec0f1e41b3a17c99eebef9760273.exe	62

C:\Users\Admin\AppData\Local\Temp\54beec0f1e41b3a17c99eebef9760273.exe
"C:\Users\Admin\AppData\Local\Temp\54beec0f1e41b3a17c99eebef9760273.exe"
1⤵
- Adds Run key to start application
- Enumerates connected drives
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2172
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns1.corp-servers.ru
  2⤵
  PID:2644
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns2.corp-servers.ru
  2⤵
  PID:2520
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns2.corp-servers.ru
  2⤵
  PID:2444
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns1.corp-servers.ru
  2⤵
  PID:2696
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns1.corp-servers.ru
  2⤵
  PID:2440
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns2.corp-servers.ru
  2⤵
  PID:548
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns2.corp-servers.ru
  2⤵
  PID:1716
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns1.corp-servers.ru
  2⤵
  PID:2628
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns1.corp-servers.ru
  2⤵
  PID:3024
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns2.corp-servers.ru
  2⤵
  PID:1088
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns2.corp-servers.ru
  2⤵
  PID:2184
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns1.corp-servers.ru
  2⤵
  PID:2028
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns1.corp-servers.ru
  2⤵
  PID:2036
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns2.corp-servers.ru
  2⤵
  PID:2164
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns2.corp-servers.ru
  2⤵
  PID:1652
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns1.corp-servers.ru
  2⤵
  PID:2284
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns1.corp-servers.ru
  2⤵
  PID:2384
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns2.corp-servers.ru
  2⤵
  PID:3056
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns2.corp-servers.ru
  2⤵
  PID:2236
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns1.corp-servers.ru
  2⤵
  PID:2100
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns1.corp-servers.ru
  2⤵
  PID:2364
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns2.corp-servers.ru
  2⤵
  PID:3068
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns2.corp-servers.ru
  2⤵
  PID:1932
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns1.corp-servers.ru
  2⤵
  PID:2312
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns1.corp-servers.ru
  2⤵
  PID:1924
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns2.corp-servers.ru
  2⤵
  PID:1828
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns2.corp-servers.ru
  2⤵
  PID:2884
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns1.corp-servers.ru
  2⤵
  PID:1696
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns1.corp-servers.ru
  2⤵
  PID:2068
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns2.corp-servers.ru
  2⤵
  PID:1872
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns2.corp-servers.ru
  2⤵
  PID:1268
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns1.corp-servers.ru
  2⤵
  PID:2808
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns1.corp-servers.ru
  2⤵
  PID:1752
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns2.corp-servers.ru
  2⤵
  PID:1700
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns2.corp-servers.ru
  2⤵
  PID:2656
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns1.corp-servers.ru
  2⤵
  PID:2688
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns1.corp-servers.ru
  2⤵
  PID:1260
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns2.corp-servers.ru
  2⤵
  PID:1748
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns2.corp-servers.ru
  2⤵
  PID:1964
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns1.corp-servers.ru
  2⤵
  PID:2928
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns1.corp-servers.ru
  2⤵
  PID:2472
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns2.corp-servers.ru
  2⤵
  PID:780
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns2.corp-servers.ru
  2⤵
  PID:2732
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns1.corp-servers.ru
  2⤵
  PID:2004
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns1.corp-servers.ru
  2⤵
  PID:2008
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns2.corp-servers.ru
  2⤵
  PID:2024
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns2.corp-servers.ru
  2⤵
  PID:568
- C:\Windows\SysWOW64\nslookup.exe
  nslookup ransomware.bit ns1.corp-servers.ru
  2⤵
  PID:576
- C:\Windows\SysWOW64\nslookup.exe
  nslookup zonealarm.bit ns1.corp-servers.ru
  2⤵
  PID:1876

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/2172-1-0x0000000002470000-0x0000000002570000-memory.dmp

Filesize
1024KB

Download
memory/2172-4-0x0000000000400000-0x00000000022E2000-memory.dmp

Filesize
30.9MB

Download
memory/2172-3-0x0000000000220000-0x0000000000237000-memory.dmp

Filesize
92KB

Download
memory/2172-11-0x0000000000400000-0x00000000022E2000-memory.dmp

Filesize
30.9MB

Download
memory/2172-13-0x0000000002470000-0x0000000002570000-memory.dmp

Filesize
1024KB

Download
memory/2172-14-0x0000000000220000-0x0000000000237000-memory.dmp

Filesize
92KB

Download