doubleback | 59de5c70ad1a5134fda141c933380bf1e55eb52e041ff37cf5394f8b9dcb5767

General

Target

document-37-1849.xls
Size

187KB
MD5

c41a21a821bcdea1d3ab26ebef055eed
SHA1

912c8c1792dd33bac263df4b71242078d74741e9
SHA256

d1d0ac76e59b9e2a8ae3a433e0186d74fc61417c89fe5ee4b93c02faa1dc58f8
SHA512

ed665e9a7d3e950318628ad4ea112da063e4f156ea7d2d58fbeaa31cc2486c7d2debb779da72723d8f55bdec6b9a4b87f9d148c50b0a368c4bc5b59ac646a42a

Score

10^/10

doubleback backdoor

Malware Config

Signatures

DoubleBack
DoubleBack is a modular backdoor first seen in December 2020.
backdoor doubleback

DoubleBack x64 Payload 2 IoCs

Processes:

resource	yara_rule
C:\ycjqFXSM\kO2NIybn\mozsqlite3.dll	family_doubleback_x64
\ycjqFXSM\kO2NIybn\mozsqlite3.dll	family_doubleback_x64

DoubleBack x86 Payload 2 IoCs

Processes:

resource	yara_rule
C:\ycjqFXSM\kO2NIybn\mozsqlite3.dll	family_doubleback_x86
\ycjqFXSM\kO2NIybn\mozsqlite3.dll	family_doubleback_x86

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

cmd.exe

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3040	3056	cmd.exe	EXCEL.EXE

Executes dropped EXE 1 IoCs

Processes:

pDImcT.exe

pid process

2352 pDImcT.exe
Loads dropped DLL 1 IoCs

Processes:

pDImcT.exe

pid process

2352 pDImcT.exe

pid	process
2352	pDImcT.exe

pid	process
2352	pDImcT.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

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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

3056 EXCEL.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

3056 EXCEL.EXE
3056 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
3056	EXCEL.EXE
3056	EXCEL.EXE
3056	EXCEL.EXE
3056	EXCEL.EXE
3056	EXCEL.EXE
3056	EXCEL.EXE
3056	EXCEL.EXE
3056	EXCEL.EXE
3056	EXCEL.EXE
3056	EXCEL.EXE
3056	EXCEL.EXE
3056	EXCEL.EXE

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 3056 wrote to memory of 3040	3056	EXCEL.EXE	cmd.exe
PID 3056 wrote to memory of 3040	3056	EXCEL.EXE	cmd.exe
PID 3056 wrote to memory of 2352	3056	EXCEL.EXE	pDImcT.exe
PID 3056 wrote to memory of 2352	3056	EXCEL.EXE	pDImcT.exe
PID 3056 wrote to memory of 2352	3056	EXCEL.EXE	pDImcT.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\document-37-1849.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3056

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c copy "%ProgramFiles(x86)%\Internet Explorer\ExtExport.exe" C:\ycjqFXSM\kO2NIybn\pDImcT.exe
2⤵
- Process spawned unexpected child process
PID:3040

C:\ycjqFXSM\kO2NIybn\pDImcT.exe
"C:\ycjqFXSM\kO2NIybn\pDImcT.exe" C:\ycjqFXSM\kO2NIybn ALHJ zqtRI
2⤵
- Executes dropped EXE
- Loads dropped DLL
PID:2352

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\ycjqFXSM\kO2NIybn\mozsqlite3.dll

MD5
9171c8fc7d3b2aeb3763d477d5718b1d

SHA1
8a6363175e7d7d4726865334e3652dd0fc9de35c

SHA256
83e0d55b4cd73be3bf89729408e8f62b1533becf3478ce5666317c3f4561ca0d

SHA512
cabce59102c66e1e123ba84417dba93c7b993b69daf981d52b6a976e12a7dc802f770fb6ba1de4a3667a49b938463891d40d632b0d55d602dee3716a46a5a8d9

Download Submit
C:\ycjqFXSM\kO2NIybn\pDImcT.exe

MD5
91296a2e5e485d4b3a0934cb8b3b6672

SHA1
f33732f37de825c672d9b54abf7f79ae06286fe6

SHA256
56a7449a9d8204f9e3cc9330eda8044c666bc5418482d68fbb7aa1b1c3d60a1e

SHA512
cf14f3cf50627a155cec4524e3ab90c17e1ee607606e50ffecab7f67f0650f812123d1a91a793a7484e3155fc5ec423f8d440a8dd6324cb3a303e7f5f2066cb6

Download Submit
C:\ycjqFXSM\kO2NIybn\pDImcT.exe

MD5
91296a2e5e485d4b3a0934cb8b3b6672

SHA1
f33732f37de825c672d9b54abf7f79ae06286fe6

SHA256
56a7449a9d8204f9e3cc9330eda8044c666bc5418482d68fbb7aa1b1c3d60a1e

SHA512
cf14f3cf50627a155cec4524e3ab90c17e1ee607606e50ffecab7f67f0650f812123d1a91a793a7484e3155fc5ec423f8d440a8dd6324cb3a303e7f5f2066cb6

Download Submit
\ycjqFXSM\kO2NIybn\mozsqlite3.dll

MD5
9171c8fc7d3b2aeb3763d477d5718b1d

SHA1
8a6363175e7d7d4726865334e3652dd0fc9de35c

SHA256
83e0d55b4cd73be3bf89729408e8f62b1533becf3478ce5666317c3f4561ca0d

SHA512
cabce59102c66e1e123ba84417dba93c7b993b69daf981d52b6a976e12a7dc802f770fb6ba1de4a3667a49b938463891d40d632b0d55d602dee3716a46a5a8d9

Download Submit
memory/2352-181-0x0000000000000000-mapping.dmp

Download
memory/3040-179-0x0000000000000000-mapping.dmp

Download
memory/3056-117-0x00007FFF9B3D0000-0x00007FFF9B3E0000-memory.dmp

Filesize
64KB

Download
memory/3056-123-0x000002431A510000-0x000002431C405000-memory.dmp

Filesize
31.0MB

Download
memory/3056-122-0x00007FFFBBFB0000-0x00007FFFBD09E000-memory.dmp

Filesize
16.9MB

Download
memory/3056-121-0x00007FFF9B3D0000-0x00007FFF9B3E0000-memory.dmp

Filesize
64KB

Download
memory/3056-118-0x00007FFF9B3D0000-0x00007FFF9B3E0000-memory.dmp

Filesize
64KB

Download
memory/3056-114-0x00007FF66E3D0000-0x00007FF671986000-memory.dmp

Filesize
53.7MB

Download
memory/3056-116-0x00007FFF9B3D0000-0x00007FFF9B3E0000-memory.dmp

Filesize
64KB

Download
memory/3056-115-0x00007FFF9B3D0000-0x00007FFF9B3E0000-memory.dmp

Filesize
64KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads