dridex | 4b365dadb8a5d68b5ff999a1b5991aa0cad00852e0ed7517c4748ecc5f402558

General

Target

Contract 30964.xls
Size

727KB
MD5

c84236e6997a25861e15d5d44a7d207e
SHA1

f4b0cad4dfa47c8ce6feaaeea3ee3ef79708ffe5
SHA256

4b365dadb8a5d68b5ff999a1b5991aa0cad00852e0ed7517c4748ecc5f402558
SHA512

ca35ae9393899391a9593d2f0c94d04314c267c4385fd96b06776c066cfa3bc42db6c348a622349cbc4315352fb63213c105c47a9c198f417b898bddf8105058

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 2912 4048 wmiC.exe

description	pid	pid_target	process	target process
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2912	4048	wmiC.exe

Dridex Loader 1 IoCs

Detects Dridex both x86 and x64 loader in memory.

botnet loader

Processes:

resource	yara_rule
behavioral2/memory/3704-8-0x0000000073EE0000-0x0000000073EFF000-memory.dmp	dridex_ldr

Blocklisted process makes network request 1 IoCs

Processes:

wmiC.exe

flow pid process

26 2912 wmiC.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

3704 rundll32.exe

flow	pid	process
26	2912	wmiC.exe

pid	process
3704	rundll32.exe

JavaScript code in executable 2 IoCs

Processes:

resource	yara_rule
C:\Windows\Temp\elkde.dll	js
\Windows\Temp\elkde.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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	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

1160 EXCEL.EXE

Suspicious use of AdjustPrivilegeToken 42 IoCs

Processes:

wmiC.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	2912	wmiC.exe
Token: SeSecurityPrivilege	2912	wmiC.exe
Token: SeTakeOwnershipPrivilege	2912	wmiC.exe
Token: SeLoadDriverPrivilege	2912	wmiC.exe
Token: SeSystemProfilePrivilege	2912	wmiC.exe
Token: SeSystemtimePrivilege	2912	wmiC.exe
Token: SeProfSingleProcessPrivilege	2912	wmiC.exe
Token: SeIncBasePriorityPrivilege	2912	wmiC.exe
Token: SeCreatePagefilePrivilege	2912	wmiC.exe
Token: SeBackupPrivilege	2912	wmiC.exe
Token: SeRestorePrivilege	2912	wmiC.exe
Token: SeShutdownPrivilege	2912	wmiC.exe
Token: SeDebugPrivilege	2912	wmiC.exe
Token: SeSystemEnvironmentPrivilege	2912	wmiC.exe
Token: SeRemoteShutdownPrivilege	2912	wmiC.exe
Token: SeUndockPrivilege	2912	wmiC.exe
Token: SeManageVolumePrivilege	2912	wmiC.exe
Token: 33	2912	wmiC.exe
Token: 34	2912	wmiC.exe
Token: 35	2912	wmiC.exe
Token: 36	2912	wmiC.exe
Token: SeIncreaseQuotaPrivilege	2912	wmiC.exe
Token: SeSecurityPrivilege	2912	wmiC.exe
Token: SeTakeOwnershipPrivilege	2912	wmiC.exe
Token: SeLoadDriverPrivilege	2912	wmiC.exe
Token: SeSystemProfilePrivilege	2912	wmiC.exe
Token: SeSystemtimePrivilege	2912	wmiC.exe
Token: SeProfSingleProcessPrivilege	2912	wmiC.exe
Token: SeIncBasePriorityPrivilege	2912	wmiC.exe
Token: SeCreatePagefilePrivilege	2912	wmiC.exe
Token: SeBackupPrivilege	2912	wmiC.exe
Token: SeRestorePrivilege	2912	wmiC.exe
Token: SeShutdownPrivilege	2912	wmiC.exe
Token: SeDebugPrivilege	2912	wmiC.exe
Token: SeSystemEnvironmentPrivilege	2912	wmiC.exe
Token: SeRemoteShutdownPrivilege	2912	wmiC.exe
Token: SeUndockPrivilege	2912	wmiC.exe
Token: SeManageVolumePrivilege	2912	wmiC.exe
Token: 33	2912	wmiC.exe
Token: 34	2912	wmiC.exe
Token: 35	2912	wmiC.exe
Token: 36	2912	wmiC.exe

Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

1160 EXCEL.EXE
1160 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
1160	EXCEL.EXE
1160	EXCEL.EXE
1160	EXCEL.EXE
1160	EXCEL.EXE
1160	EXCEL.EXE
1160	EXCEL.EXE
1160	EXCEL.EXE
1160	EXCEL.EXE
1160	EXCEL.EXE
1160	EXCEL.EXE
1160	EXCEL.EXE
1160	EXCEL.EXE

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

wmiC.exerundll32.exe

description	pid	process	target process
PID 2912 wrote to memory of 2012	2912	wmiC.exe	rundll32.exe
PID 2912 wrote to memory of 2012	2912	wmiC.exe	rundll32.exe
PID 2012 wrote to memory of 3704	2012	rundll32.exe	rundll32.exe
PID 2012 wrote to memory of 3704	2012	rundll32.exe	rundll32.exe
PID 2012 wrote to memory of 3704	2012	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 30964.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
PID:1160

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:2912

C:\Windows\System32\rundll32.exe
"C:\Windows\System32\rundll32.exe" C:/Windows/Temp//elkde.dll InitHelperDll
2⤵
- Suspicious use of WriteProcessMemory
PID:2012

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\System32\rundll32.exe" C:/Windows/Temp//elkde.dll InitHelperDll
3⤵
- Loads dropped DLL
PID:3704

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\22318.Xsl
MD5
e3a79122a87bf19fdf4806107057fd76

SHA1
bb37c6e0105f7cf0b1d493bdc70461cf9205adb3

SHA256
0b3882afb92516477f07439957421c7cc89eb4119d85a80a69047be15802f09f

SHA512
15860e164cbc1cca8d92acd509ed2dbc5c3c537d7ee422f9183ce635039a3ca41483ec5a8f5d28527490931f95870aeab44a804e5b7658ce377d0ee6c5f5850e

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C:\Windows\Temp\elkde.dll
MD5
1c918636e8b37ca62aa3adc4080bfc04

SHA1
5ca59c659c799016dac95f7156eb8f750bf367f0

SHA256
aa011818f23997b6dd44e74fe4242aa8e50f10d7e26f1ba05134198cd04920e5

SHA512
b8ac01256bdd943b675931c4d91f7770d81253a1fff84c48021377df1a4d5c3ecd98db977aeab9a1a2c26aaf6f477929077f4bd4d9458c19046a58fe727bbbd6

Download Submit
\Windows\Temp\elkde.dll
MD5
1c918636e8b37ca62aa3adc4080bfc04

SHA1
5ca59c659c799016dac95f7156eb8f750bf367f0

SHA256
aa011818f23997b6dd44e74fe4242aa8e50f10d7e26f1ba05134198cd04920e5

SHA512
b8ac01256bdd943b675931c4d91f7770d81253a1fff84c48021377df1a4d5c3ecd98db977aeab9a1a2c26aaf6f477929077f4bd4d9458c19046a58fe727bbbd6

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memory/1160-2-0x00007FFE208A0000-0x00007FFE20ED7000-memory.dmp

Filesize
6.2MB

Download
memory/2012-4-0x0000000000000000-mapping.dmp

Download
memory/3704-6-0x0000000000000000-mapping.dmp

Download
memory/3704-8-0x0000000073EE0000-0x0000000073EFF000-memory.dmp

Filesize
124KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads