dridex | 9ef35a402338ba732b6357dd7211f47c81ec9a8bc02dc6bc032d839947b08359

Analysis

max time kernel
121s
max time network
124s
platform
windows10_x64
resource
win10-en-20211014
submitted
21-10-2021 08:42

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General

Target

4_System.Data.Linq.dll
Size

180KB
MD5

ae1ed6b52578a3d7392575e5f03eff32
SHA1

a3776c95e9b9fc0e331ef1e0b1c57421fab3aeda
SHA256

9ef35a402338ba732b6357dd7211f47c81ec9a8bc02dc6bc032d839947b08359
SHA512

59751917c7396b8bb70f03af677d512d7cbac13973e189259079ee518091379aa913c7102bd408e29d8753655266005d8eb603b2e352295cfabbdd97a1aa2f2a

Score

10^/10

dridex 22201 botnet loader

Malware Config

Extracted

Family

dridex

Botnet

22201

155.138.203.91:443

207.180.220.242:8116

46.101.142.214:6891

rc4.plain

Signatures

Dridex
Dridex(known as Bugat/Cridex) is a form of malware that specializes in stealing bank credentials.
botnet dridex

Dridex Loader 1 IoCs

Detects Dridex both x86 and x64 loader in memory.

botnet loader

Processes:

resource	yara_rule
behavioral2/memory/3708-116-0x0000000073930000-0x000000007395F000-memory.dmp	dridex_ldr

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

816 3708 WerFault.exe rundll32.exe

pid	pid_target	process	target process
816	3708	WerFault.exe	rundll32.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

Processes:

WerFault.exe

pid	process
816	WerFault.exe
816	WerFault.exe
816	WerFault.exe
816	WerFault.exe
816	WerFault.exe
816	WerFault.exe
816	WerFault.exe
816	WerFault.exe
816	WerFault.exe
816	WerFault.exe
816	WerFault.exe
816	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

WerFault.exe

description pid process

Token: SeRestorePrivilege 816 WerFault.exe
Token: SeBackupPrivilege 816 WerFault.exe
Token: SeDebugPrivilege 816 WerFault.exe

description	pid	process
Token: SeRestorePrivilege	816	WerFault.exe
Token: SeBackupPrivilege	816	WerFault.exe
Token: SeDebugPrivilege	816	WerFault.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 1524 wrote to memory of 3708	1524	rundll32.exe	rundll32.exe
PID 1524 wrote to memory of 3708	1524	rundll32.exe	rundll32.exe
PID 1524 wrote to memory of 3708	1524	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\4_System.Data.Linq.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1524

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\4_System.Data.Linq.dll,#1
2⤵
PID:3708

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3708 -s 620
3⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:816

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

memory/3708-115-0x0000000000000000-mapping.dmp

Download
memory/3708-116-0x0000000073930000-0x000000007395F000-memory.dmp

Filesize
188KB

Download
memory/3708-118-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download