crimsonrat | 4546bf50e116c0cc49d206b2be2815f2724944ba7aa0b305837f90dbddd863c7

General

Target
297a331c90ab8923b7d44a8c2e59f7b8.exe
Size 296KB
Sample201130-h5xxt4rl3a
SHA256 4546bf50e116c0cc49d206b2be2815f2724944ba7aa0b305837f90dbddd863c7
MD5 297a331c90ab8923b7d44a8c2e59f7b8
SHA1 881514ba7df186ec16ac03d279cb0c1df8afb948
SHA512 41a6543f21c25f385adb8c604d991454d23c9e540a7ca24e86653de4b9232d581de67e2680c966ef8179f951b110c0246f602b6260e940432bf164d44936e52d
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Signatures

CrimsonRAT Main Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x00030000000130e8-8.dat	family_crimsonrat
behavioral1/files/0x00030000000130e8-9.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
1992	fhrnthivesa.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\PROGRA~3\HINTHA~1\fhrnthivesa.exe	297a331c90ab8923b7d44a8c2e59f7b8.exe
File created	C:\PROGRA~3\HINTHA~1\fhrnthivesa.exe	297a331c90ab8923b7d44a8c2e59f7b8.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Debug\WIA\wiatrace.log	WINWORD.EXE

Modifies Internet Explorer settings 1 TTPs 10 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Main	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	WINWORD.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	WINWORD.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	WINWORD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
744	WINWORD.EXE

Suspicious use of SetWindowsHookEx 17 IoCs

pid	Process
744	WINWORD.EXE
744	WINWORD.EXE
744	WINWORD.EXE
744	WINWORD.EXE
744	WINWORD.EXE
744	WINWORD.EXE
744	WINWORD.EXE
744	WINWORD.EXE
744	WINWORD.EXE
744	WINWORD.EXE
744	WINWORD.EXE
744	WINWORD.EXE
744	WINWORD.EXE
744	WINWORD.EXE
744	WINWORD.EXE
744	WINWORD.EXE
744	WINWORD.EXE

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2028 wrote to memory of 744	2028	297a331c90ab8923b7d44a8c2e59f7b8.exe	29
PID 2028 wrote to memory of 744	2028	297a331c90ab8923b7d44a8c2e59f7b8.exe	29
PID 2028 wrote to memory of 744	2028	297a331c90ab8923b7d44a8c2e59f7b8.exe	29
PID 2028 wrote to memory of 744	2028	297a331c90ab8923b7d44a8c2e59f7b8.exe	29
PID 2028 wrote to memory of 1992	2028	297a331c90ab8923b7d44a8c2e59f7b8.exe	30
PID 2028 wrote to memory of 1992	2028	297a331c90ab8923b7d44a8c2e59f7b8.exe	30
PID 2028 wrote to memory of 1992	2028	297a331c90ab8923b7d44a8c2e59f7b8.exe	30

C:\Users\Admin\AppData\Local\Temp\297a331c90ab8923b7d44a8c2e59f7b8.exe
"C:\Users\Admin\AppData\Local\Temp\297a331c90ab8923b7d44a8c2e59f7b8.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:2028
- C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
  "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\Documents\297a331c90ab8923b7d44a8c2e59f7b8-03-.doc"
  2⤵
  - Drops file in Windows directory
  - Modifies Internet Explorer settings
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious use of SetWindowsHookEx
  PID:744
- C:\ProgramData\Hinthavra\fhrnthivesa.exe
  "C:\ProgramData\Hinthavra\fhrnthivesa.exe"
  2⤵
  - Executes dropped EXE
  PID:1992

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/268-12-0x000007FEF7E60000-0x000007FEF80DA000-memory.dmp

Download

memory/744-10-0x0000000006100000-0x0000000006101000-memory.dmp

Download

memory/1992-11-0x000007FEEE180000-0x000007FEEEB1D000-memory.dmp

Download

memory/1992-13-0x000007FEEE180000-0x000007FEEEB1D000-memory.dmp

Download

memory/2028-2-0x000007FEF6300000-0x000007FEF6CEC000-memory.dmp

Download

memory/2028-3-0x0000000000AE0000-0x0000000000AE1000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads