dridex | 05b9806f446c71ca46bbddc10176bf28838430bbecb9545cc730fdb93b205476

General

Target

Contract_#_599848.xls
Size

815KB
MD5

82ee594ab9d12d0a00bf399beb7f4e1f
SHA1

5b58a1fefd63ca221b0eeca61b9378db25ae0eb1
SHA256

05b9806f446c71ca46bbddc10176bf28838430bbecb9545cc730fdb93b205476
SHA512

78b80fc1780c51f827ee6f71111b3b037ef0605cbe364b039e7746f6704759f9b1f2c725e7e5869bedf0a11dc9d41d21a9d527f8b2cffcd222818f7ac8651cc5

Score

10^/10

dridex 111 botnet loader ransomware

Malware Config

Extracted

Family

dridex

Botnet

111

C2

52.73.70.149:443

8.4.9.152:3786

185.246.87.202:3098

50.116.111.64:5353

rc4.plain

Signatures

Dridex
Dridex(known as Bugat/Cridex) is a form of malware that specializes in stealing bank credentials.
botnet dridex
Process spawned unexpected child process 1 IoCs
This typically indicates the parent process was compromised via an exploit or macro.

Processes:

WmIc.exe

description pid pid_target process target process

Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2388 3656 WmIc.exe

description	pid	pid_target	process	target process
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2388	3656	WmIc.exe

Dridex Loader 1 IoCs

Detects Dridex both x86 and x64 loader in memory.

botnet loader

Processes:

resource	yara_rule
behavioral2/memory/2340-8-0x0000000073830000-0x000000007384F000-memory.dmp	dridex_ldr

Blocklisted process makes network request 2 IoCs

Processes:

WmIc.exe

flow pid process

27 2388 WmIc.exe
28 2388 WmIc.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

2340 rundll32.exe

flow	pid	process
27	2388	WmIc.exe
28	2388	WmIc.exe

pid	process
2340	rundll32.exe

JavaScript code in executable 2 IoCs

Processes:

resource	yara_rule
C:\Windows\Temp\vg74a.dll	js
\Windows\Temp\vg74a.dll	js

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
ransomware

System Information Discovery
T1082

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

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

4056 EXCEL.EXE

Suspicious use of AdjustPrivilegeToken 42 IoCs

Processes:

WmIc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	2388	WmIc.exe
Token: SeSecurityPrivilege	2388	WmIc.exe
Token: SeTakeOwnershipPrivilege	2388	WmIc.exe
Token: SeLoadDriverPrivilege	2388	WmIc.exe
Token: SeSystemProfilePrivilege	2388	WmIc.exe
Token: SeSystemtimePrivilege	2388	WmIc.exe
Token: SeProfSingleProcessPrivilege	2388	WmIc.exe
Token: SeIncBasePriorityPrivilege	2388	WmIc.exe
Token: SeCreatePagefilePrivilege	2388	WmIc.exe
Token: SeBackupPrivilege	2388	WmIc.exe
Token: SeRestorePrivilege	2388	WmIc.exe
Token: SeShutdownPrivilege	2388	WmIc.exe
Token: SeDebugPrivilege	2388	WmIc.exe
Token: SeSystemEnvironmentPrivilege	2388	WmIc.exe
Token: SeRemoteShutdownPrivilege	2388	WmIc.exe
Token: SeUndockPrivilege	2388	WmIc.exe
Token: SeManageVolumePrivilege	2388	WmIc.exe
Token: 33	2388	WmIc.exe
Token: 34	2388	WmIc.exe
Token: 35	2388	WmIc.exe
Token: 36	2388	WmIc.exe
Token: SeIncreaseQuotaPrivilege	2388	WmIc.exe
Token: SeSecurityPrivilege	2388	WmIc.exe
Token: SeTakeOwnershipPrivilege	2388	WmIc.exe
Token: SeLoadDriverPrivilege	2388	WmIc.exe
Token: SeSystemProfilePrivilege	2388	WmIc.exe
Token: SeSystemtimePrivilege	2388	WmIc.exe
Token: SeProfSingleProcessPrivilege	2388	WmIc.exe
Token: SeIncBasePriorityPrivilege	2388	WmIc.exe
Token: SeCreatePagefilePrivilege	2388	WmIc.exe
Token: SeBackupPrivilege	2388	WmIc.exe
Token: SeRestorePrivilege	2388	WmIc.exe
Token: SeShutdownPrivilege	2388	WmIc.exe
Token: SeDebugPrivilege	2388	WmIc.exe
Token: SeSystemEnvironmentPrivilege	2388	WmIc.exe
Token: SeRemoteShutdownPrivilege	2388	WmIc.exe
Token: SeUndockPrivilege	2388	WmIc.exe
Token: SeManageVolumePrivilege	2388	WmIc.exe
Token: 33	2388	WmIc.exe
Token: 34	2388	WmIc.exe
Token: 35	2388	WmIc.exe
Token: 36	2388	WmIc.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
4056	EXCEL.EXE
4056	EXCEL.EXE
4056	EXCEL.EXE
4056	EXCEL.EXE
4056	EXCEL.EXE
4056	EXCEL.EXE
4056	EXCEL.EXE
4056	EXCEL.EXE
4056	EXCEL.EXE
4056	EXCEL.EXE
4056	EXCEL.EXE
4056	EXCEL.EXE

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

WmIc.exerundll32.exe

description	pid	process	target process
PID 2388 wrote to memory of 3360	2388	WmIc.exe	rundll32.exe
PID 2388 wrote to memory of 3360	2388	WmIc.exe	rundll32.exe
PID 3360 wrote to memory of 2340	3360	rundll32.exe	rundll32.exe
PID 3360 wrote to memory of 2340	3360	rundll32.exe	rundll32.exe
PID 3360 wrote to memory of 2340	3360	rundll32.exe	rundll32.exe

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\Contract_#_599848.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:4056

C:\Windows\system32\wbem\WmIc.exe
WmIc
1⤵
- Process spawned unexpected child process
- Blocklisted process makes network request
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2388

C:\Windows\System32\rundll32.exe
"C:\Windows\System32\rundll32.exe" C:/Windows/Temp//vg74a.dll InitHelperDll
2⤵
- Suspicious use of WriteProcessMemory
PID:3360

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\System32\rundll32.exe" C:/Windows/Temp//vg74a.dll InitHelperDll
3⤵
- Loads dropped DLL
PID:2340

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

3

T1082

Query Registry

2

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\2AC17.xSl
MD5
6d75f5c52219c05eb60f8d4b0cacfd2f

SHA1
9b01f494a2f9b0f0e79a1441c3bc52273c900b9e

SHA256
0e5c4fe7cde7b846f72886bcc5551c642c098532d18d9d71e6f3913d2df22b14

SHA512
95c5bf80f348da62cbd1afc4afc3e3f90ce5c4b76026d47eaed2b90ffa095f149c18d806ab57ef626735bdc7805da91c03c5764579ea707a43b62d9035263636

Download Submit
C:\Windows\Temp\vg74a.dll
MD5
286ba04c4298dfdf3f832e696d1e9f41

SHA1
b9528980760dc556d6d805641419751f4d1504a0

SHA256
f7a190e49808e6ac9d28822d948efa5fb8a51547c705dd1cee92ef5138a8af00

SHA512
58105cfdf4d9879a7ee0eee9db320f05b2984261b5995668cbeb4276b58bc0ae5aa9dbd2a68f4b017f75eacf2c3deefef98a9409f47c998aca6313b3ba09a78a

Download Submit
\Windows\Temp\vg74a.dll
MD5
286ba04c4298dfdf3f832e696d1e9f41

SHA1
b9528980760dc556d6d805641419751f4d1504a0

SHA256
f7a190e49808e6ac9d28822d948efa5fb8a51547c705dd1cee92ef5138a8af00

SHA512
58105cfdf4d9879a7ee0eee9db320f05b2984261b5995668cbeb4276b58bc0ae5aa9dbd2a68f4b017f75eacf2c3deefef98a9409f47c998aca6313b3ba09a78a

Download Submit
memory/2340-6-0x0000000000000000-mapping.dmp

Download
memory/2340-8-0x0000000073830000-0x000000007384F000-memory.dmp

Filesize
124KB

Download
memory/3360-4-0x0000000000000000-mapping.dmp

Download
memory/4056-2-0x00007FFFF3BC0000-0x00007FFFF41F7000-memory.dmp

Filesize
6.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads