crimsonrat | 67da24711012366322f2e6ab3534d62c064d24dc6e113b6077354c792cc56b71

General

Target

67da24711012366322f2e6ab3534d62c064d24dc6e113b6077354c792cc56b71.xlam
Size

112KB
MD5

1b54bc52032731b5c75b9f74df7e1afe
SHA1

cdddaf72deb956e039e5e8c10230d6c872a34e10
SHA256

67da24711012366322f2e6ab3534d62c064d24dc6e113b6077354c792cc56b71
SHA512

818961365b8dd76b7cdc90e2b00d9419e13de6e0797b9fb012a2b4bcaf4e5856376ebeb216ceb9afe810b34a4227e3222aea85ccc872f7ae013a5b98f46c54d3

Score

10^/10

Malware Config

Signatures

CrimsonRAT Main Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000500000001ab34-282.dat	family_crimsonrat
behavioral2/files/0x000500000001ab34-283.dat	family_crimsonrat

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

Executes dropped EXE 2 IoCs

pid	Process
3988	pnvthirena.exe
3172	hdlbvarims.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	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

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

pid	Process
3048	EXCEL.EXE

Suspicious use of SetWindowsHookEx 24 IoCs

pid	Process
3048	EXCEL.EXE
3048	EXCEL.EXE
3048	EXCEL.EXE
3048	EXCEL.EXE
3048	EXCEL.EXE
3048	EXCEL.EXE
3048	EXCEL.EXE
3048	EXCEL.EXE
3048	EXCEL.EXE
3048	EXCEL.EXE
3048	EXCEL.EXE
3048	EXCEL.EXE
3048	EXCEL.EXE
3048	EXCEL.EXE
3048	EXCEL.EXE
3048	EXCEL.EXE
3048	EXCEL.EXE
3048	EXCEL.EXE
3048	EXCEL.EXE
3048	EXCEL.EXE
3048	EXCEL.EXE
3048	EXCEL.EXE
3048	EXCEL.EXE
3048	EXCEL.EXE

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3048 wrote to memory of 3988	3048	EXCEL.EXE	71
PID 3048 wrote to memory of 3988	3048	EXCEL.EXE	71
PID 3988 wrote to memory of 3172	3988	pnvthirena.exe	72
PID 3988 wrote to memory of 3172	3988	pnvthirena.exe	72

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\67da24711012366322f2e6ab3534d62c064d24dc6e113b6077354c792cc56b71.xlam"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3048
- C:\Users\Admin\Uthmdsa\pnvthirena.exe
  C:\Users\Admin\Uthmdsa\pnvthirena.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:3988
- - C:\ProgramData\Addobephot\hdlbvarims.exe
    "C:\ProgramData\Addobephot\hdlbvarims.exe"
    3⤵
    - Executes dropped EXE
    PID:3172

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

Replay Monitor

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Downloads

memory/3048-118-0x00007FFDCF190000-0x00007FFDCF1A0000-memory.dmp

Filesize
64KB

Download
memory/3048-128-0x00007FFDCC4B0000-0x00007FFDCC4C0000-memory.dmp

Filesize
64KB

Download
memory/3048-129-0x00007FFDCC4B0000-0x00007FFDCC4C0000-memory.dmp

Filesize
64KB

Download
memory/3048-266-0x000001DE5C100000-0x000001DE5C104000-memory.dmp

Filesize
16KB

Download
memory/3048-121-0x00007FFDCF190000-0x00007FFDCF1A0000-memory.dmp

Filesize
64KB

Download
memory/3048-116-0x00007FFDCF190000-0x00007FFDCF1A0000-memory.dmp

Filesize
64KB

Download
memory/3048-117-0x00007FFDCF190000-0x00007FFDCF1A0000-memory.dmp

Filesize
64KB

Download
memory/3048-115-0x00007FFDCF190000-0x00007FFDCF1A0000-memory.dmp

Filesize
64KB

Download
memory/3172-284-0x0000000003670000-0x0000000003672000-memory.dmp

Filesize
8KB

Download
memory/3172-285-0x0000000003672000-0x0000000003674000-memory.dmp

Filesize
8KB

Download
memory/3988-278-0x0000000003180000-0x0000000003182000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads