crimsonrat | 92717c8ecbf6524a9fefb57a346872292daa2132aeb492ccf725208474ad9179

General

Target

92717c8ecbf6524a9fefb57a346872292daa2132aeb492ccf725208474ad9179.exe
Size

459KB
MD5

1f4afc5843bb6156627d0aa7feb18e1f
SHA1

773121980b0c7b188156836b9ed341d673f8f4f6
SHA256

92717c8ecbf6524a9fefb57a346872292daa2132aeb492ccf725208474ad9179
SHA512

d0173b8f0bcc076c0d9fb1ae7d0e634f89a2bda56168be66e02c91fe3c084bb142ee70dcdb18fad81ed81fa550da05fe52dda36c5578287ecb9e3d4a50c409ad

Score

10^/10

Malware Config

Signatures

CrimsonRAT Main Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000600000001ab1e-120.dat	family_crimsonrat
behavioral2/files/0x000600000001ab1e-121.dat	family_crimsonrat

CrimsonRat
Crimson RAT is a malware linked to a Pakistani-linked threat actor.
rat crimsonrat

Executes dropped EXE 1 IoCs

pid	Process
516	rwlbmarivs.exe

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

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

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

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

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

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings	92717c8ecbf6524a9fefb57a346872292daa2132aeb492ccf725208474ad9179.exe

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
1456	WINWORD.EXE
1456	WINWORD.EXE

Suspicious use of SetWindowsHookEx 8 IoCs

pid	Process
1456	WINWORD.EXE
1456	WINWORD.EXE
1456	WINWORD.EXE
1456	WINWORD.EXE
1456	WINWORD.EXE
1456	WINWORD.EXE
1456	WINWORD.EXE
1456	WINWORD.EXE

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3136 wrote to memory of 516	3136	92717c8ecbf6524a9fefb57a346872292daa2132aeb492ccf725208474ad9179.exe	68
PID 3136 wrote to memory of 516	3136	92717c8ecbf6524a9fefb57a346872292daa2132aeb492ccf725208474ad9179.exe	68
PID 3136 wrote to memory of 1456	3136	92717c8ecbf6524a9fefb57a346872292daa2132aeb492ccf725208474ad9179.exe	69
PID 3136 wrote to memory of 1456	3136	92717c8ecbf6524a9fefb57a346872292daa2132aeb492ccf725208474ad9179.exe	69

C:\Users\Admin\AppData\Local\Temp\92717c8ecbf6524a9fefb57a346872292daa2132aeb492ccf725208474ad9179.exe
"C:\Users\Admin\AppData\Local\Temp\92717c8ecbf6524a9fefb57a346872292daa2132aeb492ccf725208474ad9179.exe"
1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3136
- C:\ProgramData\Bhithoas\rwlbmarivs.exe
  "C:\ProgramData\Bhithoas\rwlbmarivs.exe"
  2⤵
  - Executes dropped EXE
  PID:516
- C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
  "C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\Documents\92717c8ecbf6524a9fefb57a346872292daa2132aeb492ccf725208474ad9179_02 .docx" /o ""
  2⤵
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious use of SetWindowsHookEx
  PID:1456

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

memory/516-123-0x0000021E9FA80000-0x0000021E9FA82000-memory.dmp

Filesize
8KB

Download
memory/516-122-0x0000021E84AF0000-0x0000021E85498000-memory.dmp

Filesize
9.7MB

Download
memory/1456-131-0x00007FFDCC4B0000-0x00007FFDCC4C0000-memory.dmp

Filesize
64KB

Download
memory/1456-125-0x00007FFDCF190000-0x00007FFDCF1A0000-memory.dmp

Filesize
64KB

Download
memory/1456-126-0x00007FFDCF190000-0x00007FFDCF1A0000-memory.dmp

Filesize
64KB

Download
memory/1456-127-0x00007FFDCF190000-0x00007FFDCF1A0000-memory.dmp

Filesize
64KB

Download
memory/1456-130-0x00007FFDCF190000-0x00007FFDCF1A0000-memory.dmp

Filesize
64KB

Download
memory/1456-132-0x00007FFDCC4B0000-0x00007FFDCC4C0000-memory.dmp

Filesize
64KB

Download
memory/1456-124-0x00007FFDCF190000-0x00007FFDCF1A0000-memory.dmp

Filesize
64KB

Download
memory/1456-379-0x00007FFDCF190000-0x00007FFDCF1A0000-memory.dmp

Filesize
64KB

Download
memory/1456-380-0x00007FFDCF190000-0x00007FFDCF1A0000-memory.dmp

Filesize
64KB

Download
memory/1456-381-0x00007FFDCF190000-0x00007FFDCF1A0000-memory.dmp

Filesize
64KB

Download
memory/1456-382-0x00007FFDCF190000-0x00007FFDCF1A0000-memory.dmp

Filesize
64KB

Download
memory/3136-118-0x00000000028D0000-0x00000000028D2000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads