crimsonrat | 7de78f7c806f828ef071a103b7be87636414635e008ea2463bf33077a466140a

General

Target

7de78f7c806f828ef071a103b7be87636414635e008ea2463bf33077a466140a.exe
Size

1.0MB
MD5

b7c83538606a08f71107a5202acdb57a
SHA1

4bb1c28653a1754fd71d57d6deb51d281c21b43d
SHA256

7de78f7c806f828ef071a103b7be87636414635e008ea2463bf33077a466140a
SHA512

428fe43f1a9e9b7f81d68ebc1c1df9bd1eae7b25144d39def9f524a0250b39012b6c1d2044d4530d8413039d514da8148847018d216012d5cf560632587e4afd

Score

10^/10

Malware Config

Signatures

CrimsonRAT Main Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x00060000000138f2-57.dat	family_crimsonrat
behavioral1/files/0x00060000000138f2-58.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
1532	rvlrarhsma.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\PROGRA~3\Rellhars\rvlrarhsma.exe	7de78f7c806f828ef071a103b7be87636414635e008ea2463bf33077a466140a.exe
File opened for modification	C:\PROGRA~3\Rellhars\rvlrarhsma.exe	7de78f7c806f828ef071a103b7be87636414635e008ea2463bf33077a466140a.exe

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

System Information Discovery
T1082

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
852	AcroRd32.exe
852	AcroRd32.exe
852	AcroRd32.exe
852	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 964 wrote to memory of 1532	964	7de78f7c806f828ef071a103b7be87636414635e008ea2463bf33077a466140a.exe	29
PID 964 wrote to memory of 1532	964	7de78f7c806f828ef071a103b7be87636414635e008ea2463bf33077a466140a.exe	29
PID 964 wrote to memory of 1532	964	7de78f7c806f828ef071a103b7be87636414635e008ea2463bf33077a466140a.exe	29
PID 964 wrote to memory of 852	964	7de78f7c806f828ef071a103b7be87636414635e008ea2463bf33077a466140a.exe	30
PID 964 wrote to memory of 852	964	7de78f7c806f828ef071a103b7be87636414635e008ea2463bf33077a466140a.exe	30
PID 964 wrote to memory of 852	964	7de78f7c806f828ef071a103b7be87636414635e008ea2463bf33077a466140a.exe	30
PID 964 wrote to memory of 852	964	7de78f7c806f828ef071a103b7be87636414635e008ea2463bf33077a466140a.exe	30

C:\Users\Admin\AppData\Local\Temp\7de78f7c806f828ef071a103b7be87636414635e008ea2463bf33077a466140a.exe
"C:\Users\Admin\AppData\Local\Temp\7de78f7c806f828ef071a103b7be87636414635e008ea2463bf33077a466140a.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:964
- C:\ProgramData\Rellhars\rvlrarhsma.exe
  "C:\ProgramData\Rellhars\rvlrarhsma.exe"
  2⤵
  - Executes dropped EXE
  PID:1532
- C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
  "C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\Documents\7de78f7c806f828ef071a103b7be87636414635e008ea2463bf33077a466140a-4 .pdf"
  2⤵
  - Suspicious use of SetWindowsHookEx
  PID:852

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/852-61-0x0000000075F91000-0x0000000075F93000-memory.dmp

Filesize
8KB

Download
memory/964-55-0x0000000000C30000-0x0000000000D42000-memory.dmp

Filesize
1.1MB

Download
memory/964-56-0x000000001B770000-0x000000001B772000-memory.dmp

Filesize
8KB

Download
memory/1532-59-0x00000000028E0000-0x00000000028E2000-memory.dmp

Filesize
8KB

Download
memory/1532-60-0x000007FEEB120000-0x000007FEEC1B6000-memory.dmp

Filesize
16.6MB

Download
memory/1532-62-0x00000000028E6000-0x0000000002905000-memory.dmp

Filesize
124KB

Download

Analysis

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