crimsonrat | 93f33e4e9a732de665510aa5fdc565fc00bcf5e28101c5cc55b5b16f94288b8a

General

Target

Guidelines.xlam
Size

127KB
MD5

e0f6bcdb71df502f7aefe22db8207a69
SHA1

9f7357219cbfb5b940d5809f8564a6bb821fa036
SHA256

0335de8eadbbd5dc7cbe92ef869bcea6f6596ac39a38680142c982ec6e97ecde
SHA512

ea9fc5fe2bcd8a225c7f7f7b8ea832e3d143278a07c6264edaf9476fb5e7852efdd9b3dbcde6e211ccb1e6d011b11845def65af58e9298a01b3067a05200d7cc

Score

10^/10

Malware Config

Signatures

CrimsonRAT Main Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000500000001ab70-285.dat	family_crimsonrat
behavioral2/files/0x000500000001ab70-286.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
4076	hbraeiwas.exe
716	dlrarhsiva.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 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

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

pid	Process
2524	EXCEL.EXE

Suspicious use of SetWindowsHookEx 16 IoCs

pid	Process
2524	EXCEL.EXE
2524	EXCEL.EXE
2524	EXCEL.EXE
2524	EXCEL.EXE
2524	EXCEL.EXE
2524	EXCEL.EXE
2524	EXCEL.EXE
2524	EXCEL.EXE
2524	EXCEL.EXE
2524	EXCEL.EXE
2524	EXCEL.EXE
2524	EXCEL.EXE
2524	EXCEL.EXE
2524	EXCEL.EXE
2524	EXCEL.EXE
2524	EXCEL.EXE

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2524 wrote to memory of 4076	2524	EXCEL.EXE	74
PID 2524 wrote to memory of 4076	2524	EXCEL.EXE	74
PID 4076 wrote to memory of 716	4076	hbraeiwas.exe	75
PID 4076 wrote to memory of 716	4076	hbraeiwas.exe	75

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\Guidelines.xlam"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2524
- C:\Users\Admin\Glhvadia\hbraeiwas.exe
  C:\Users\Admin\Glhvadia\hbraeiwas.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:4076
- - C:\ProgramData\Hdlharas\dlrarhsiva.exe
    "C:\ProgramData\Hdlharas\dlrarhsiva.exe"
    3⤵
    - Executes dropped EXE
    PID:716

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/716-290-0x0000000003842000-0x0000000003844000-memory.dmp

Filesize
8KB

Download
memory/716-287-0x0000000003840000-0x0000000003842000-memory.dmp

Filesize
8KB

Download
memory/2524-129-0x00007FF937180000-0x00007FF937190000-memory.dmp

Filesize
64KB

Download
memory/2524-270-0x0000022EAEDD0000-0x0000022EAEDD4000-memory.dmp

Filesize
16KB

Download
memory/2524-115-0x00007FF93ACF0000-0x00007FF93AD00000-memory.dmp

Filesize
64KB

Download
memory/2524-118-0x00007FF93ACF0000-0x00007FF93AD00000-memory.dmp

Filesize
64KB

Download
memory/2524-117-0x00007FF93ACF0000-0x00007FF93AD00000-memory.dmp

Filesize
64KB

Download
memory/2524-116-0x00007FF93ACF0000-0x00007FF93AD00000-memory.dmp

Filesize
64KB

Download
memory/2524-128-0x00007FF937180000-0x00007FF937190000-memory.dmp

Filesize
64KB

Download
memory/2524-119-0x00007FF93ACF0000-0x00007FF93AD00000-memory.dmp

Filesize
64KB

Download
memory/4076-282-0x0000000002B00000-0x0000000002B02000-memory.dmp

Filesize
8KB

Download
memory/4076-288-0x0000000002B02000-0x0000000002B04000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads