crimsonrat | 4710d1b4feab4e2a66bb0f19f9a0b274a74ddaca72e684bf7ef8b8b9bb05e8a8

Analysis

max time kernel
155s
max time network
162s
platform
windows10_x64
resource
win10-en-20211208
submitted
30-01-2022 15:09

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General

Target

Coast Guard HQ 10.exe
Size

1.0MB
MD5

b7c83538606a08f71107a5202acdb57a
SHA1

4bb1c28653a1754fd71d57d6deb51d281c21b43d
SHA256

7de78f7c806f828ef071a103b7be87636414635e008ea2463bf33077a466140a
SHA512

428fe43f1a9e9b7f81d68ebc1c1df9bd1eae7b25144d39def9f524a0250b39012b6c1d2044d4530d8413039d514da8148847018d216012d5cf560632587e4afd

Score

10^/10

crimsonrat rat

Malware Config

Signatures

CrimsonRAT Main Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000700000001ab12-120.dat	family_crimsonrat
behavioral2/files/0x000700000001ab12-121.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
960	rvlrarhsma.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 2 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	AcroRd32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	AcroRd32.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION	AcroRd32.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000_Classes\Local Settings	Coast Guard HQ 10.exe

Suspicious behavior: EnumeratesProcesses 20 IoCs

pid	Process
2940	AcroRd32.exe
2940	AcroRd32.exe
2940	AcroRd32.exe
2940	AcroRd32.exe
2940	AcroRd32.exe
2940	AcroRd32.exe
2940	AcroRd32.exe
2940	AcroRd32.exe
2940	AcroRd32.exe
2940	AcroRd32.exe
2940	AcroRd32.exe
2940	AcroRd32.exe
2940	AcroRd32.exe
2940	AcroRd32.exe
2940	AcroRd32.exe
2940	AcroRd32.exe
2940	AcroRd32.exe
2940	AcroRd32.exe
2940	AcroRd32.exe
2940	AcroRd32.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2940	AcroRd32.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
2940	AcroRd32.exe
2940	AcroRd32.exe
2940	AcroRd32.exe
2940	AcroRd32.exe
2940	AcroRd32.exe
2940	AcroRd32.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2268 wrote to memory of 960	2268	Coast Guard HQ 10.exe	69
PID 2268 wrote to memory of 960	2268	Coast Guard HQ 10.exe	69
PID 2268 wrote to memory of 2940	2268	Coast Guard HQ 10.exe	70
PID 2268 wrote to memory of 2940	2268	Coast Guard HQ 10.exe	70
PID 2268 wrote to memory of 2940	2268	Coast Guard HQ 10.exe	70
PID 2940 wrote to memory of 608	2940	AcroRd32.exe	73
PID 2940 wrote to memory of 608	2940	AcroRd32.exe	73
PID 2940 wrote to memory of 608	2940	AcroRd32.exe	73
PID 2940 wrote to memory of 3256	2940	AcroRd32.exe	74
PID 2940 wrote to memory of 3256	2940	AcroRd32.exe	74
PID 2940 wrote to memory of 3256	2940	AcroRd32.exe	74
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 900	608	RdrCEF.exe	75
PID 608 wrote to memory of 2228	608	RdrCEF.exe	76
PID 608 wrote to memory of 2228	608	RdrCEF.exe	76
PID 608 wrote to memory of 2228	608	RdrCEF.exe	76
PID 608 wrote to memory of 2228	608	RdrCEF.exe	76
PID 608 wrote to memory of 2228	608	RdrCEF.exe	76
PID 608 wrote to memory of 2228	608	RdrCEF.exe	76
PID 608 wrote to memory of 2228	608	RdrCEF.exe	76
PID 608 wrote to memory of 2228	608	RdrCEF.exe	76
PID 608 wrote to memory of 2228	608	RdrCEF.exe	76
PID 608 wrote to memory of 2228	608	RdrCEF.exe	76
PID 608 wrote to memory of 2228	608	RdrCEF.exe	76
PID 608 wrote to memory of 2228	608	RdrCEF.exe	76

C:\Users\Admin\AppData\Local\Temp\Coast Guard HQ 10.exe
"C:\Users\Admin\AppData\Local\Temp\Coast Guard HQ 10.exe"
1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2268
- C:\ProgramData\Rellhars\rvlrarhsma.exe
  "C:\ProgramData\Rellhars\rvlrarhsma.exe"
  2⤵
  - Executes dropped EXE
  PID:960
- C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe
  "C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe" "C:\Users\Admin\Documents\Coast Guard HQ 10-4 .pdf"
  2⤵
  - Checks processor information in registry
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2940
- - C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe
    "C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe" --backgroundcolor=16514043
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:608
  - - C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe
      "C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe" --type=gpu-process --disable-pack-loading --lang=en-US --log-file="C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\debug.log" --log-severity=disable --product-version="ReaderServices/19.10.20064 Chrome/64.0.3282.119" --gpu-preferences=GAAAAAAAAAAAB4AAAQAAAAAAAAAAAGAA --use-gl=swiftshader-webgl --gpu-vendor-id=0x1234 --gpu-device-id=0x1111 --gpu-driver-vendor="Google Inc." --gpu-driver-version=3.3.0.2 --gpu-driver-date=2017/04/07 --disable-pack-loading --lang=en-US --log-file="C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\debug.log" --log-severity=disable --product-version="ReaderServices/19.10.20064 Chrome/64.0.3282.119" --service-request-channel-token=BF04D9953978AF82FE3C56698D13CDF0 --mojo-platform-channel-handle=1636 --allow-no-sandbox-job --ignored=" --type=renderer " /prefetch:2
      4⤵
      PID:900
  - - C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe
      "C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe" --type=renderer --disable-browser-side-navigation --disable-gpu-compositing --service-pipe-token=DEEAC183403869C2A909164FFFB6B990 --lang=en-US --disable-pack-loading --lang=en-US --log-file="C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\debug.log" --log-severity=disable --product-version="ReaderServices/19.10.20064 Chrome/64.0.3282.119" --enable-pinch --device-scale-factor=1 --num-raster-threads=1 --enable-gpu-async-worker-context --content-image-texture-target=0,0,3553;0,1,3553;0,2,3553;0,3,3553;0,4,3553;0,5,3553;0,6,3553;0,7,3553;0,8,3553;0,9,3553;0,10,3553;0,11,3553;0,12,3553;0,13,3553;0,14,3553;0,15,3553;0,16,3553;0,17,3553;0,18,3553;1,0,3553;1,1,3553;1,2,3553;1,3,3553;1,4,3553;1,5,3553;1,6,3553;1,7,3553;1,8,3553;1,9,3553;1,10,3553;1,11,3553;1,12,3553;1,13,3553;1,14,3553;1,15,3553;1,16,3553;1,17,3553;1,18,3553;2,0,3553;2,1,3553;2,2,3553;2,3,3553;2,4,3553;2,5,3553;2,6,3553;2,7,3553;2,8,3553;2,9,3553;2,10,3553;2,11,3553;2,12,3553;2,13,3553;2,14,3553;2,15,3553;2,16,3553;2,17,3553;2,18,3553;3,0,3553;3,1,3553;3,2,3553;3,3,3553;3,4,3553;3,5,3553;3,6,3553;3,7,3553;3,8,3553;3,9,3553;3,10,3553;3,11,3553;3,12,3553;3,13,3553;3,14,3553;3,15,3553;3,16,3553;3,17,3553;3,18,3553;4,0,3553;4,1,3553;4,2,3553;4,3,3553;4,4,3553;4,5,3553;4,6,3553;4,7,3553;4,8,3553;4,9,3553;4,10,3553;4,11,3553;4,12,3553;4,13,3553;4,14,3553;4,15,3553;4,16,3553;4,17,3553;4,18,3553;5,0,3553;5,1,3553;5,2,3553;5,3,3553;5,4,3553;5,5,3553;5,6,3553;5,7,3553;5,8,3553;5,9,3553;5,10,3553;5,11,3553;5,12,3553;5,13,3553;5,14,3553;5,15,3553;5,16,3553;5,17,3553;5,18,3553;6,0,3553;6,1,3553;6,2,3553;6,3,3553;6,4,3553;6,5,3553;6,6,3553;6,7,3553;6,8,3553;6,9,3553;6,10,3553;6,11,3553;6,12,3553;6,13,3553;6,14,3553;6,15,3553;6,16,3553;6,17,3553;6,18,3553 --disable-accelerated-video-decode --service-request-channel-token=DEEAC183403869C2A909164FFFB6B990 --renderer-client-id=2 --mojo-platform-channel-handle=1724 --allow-no-sandbox-job /prefetch:1
      4⤵
      PID:2228
  - - C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe
      "C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe" --type=gpu-process --disable-pack-loading --lang=en-US --log-file="C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\debug.log" --log-severity=disable --product-version="ReaderServices/19.10.20064 Chrome/64.0.3282.119" --gpu-preferences=GAAAAAAAAAAAB4AAAQAAAAAAAAAAAGAA --use-gl=swiftshader-webgl --gpu-vendor-id=0x1234 --gpu-device-id=0x1111 --gpu-driver-vendor="Google Inc." --gpu-driver-version=3.3.0.2 --gpu-driver-date=2017/04/07 --disable-pack-loading --lang=en-US --log-file="C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\debug.log" --log-severity=disable --product-version="ReaderServices/19.10.20064 Chrome/64.0.3282.119" --service-request-channel-token=B047B1103B1058C70595C24194A844A8 --mojo-platform-channel-handle=2204 --allow-no-sandbox-job --ignored=" --type=renderer " /prefetch:2
      4⤵
      PID:772
  - - C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe
      "C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe" --type=gpu-process --disable-pack-loading --lang=en-US --log-file="C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\debug.log" --log-severity=disable --product-version="ReaderServices/19.10.20064 Chrome/64.0.3282.119" --gpu-preferences=GAAAAAAAAAAAB4AAAQAAAAAAAAAAAGAA --use-gl=swiftshader-webgl --gpu-vendor-id=0x1234 --gpu-device-id=0x1111 --gpu-driver-vendor="Google Inc." --gpu-driver-version=3.3.0.2 --gpu-driver-date=2017/04/07 --disable-pack-loading --lang=en-US --log-file="C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\debug.log" --log-severity=disable --product-version="ReaderServices/19.10.20064 Chrome/64.0.3282.119" --service-request-channel-token=BE5BC432A5D35B09C37CC615005D24CF --mojo-platform-channel-handle=1656 --allow-no-sandbox-job --ignored=" --type=renderer " /prefetch:2
      4⤵
      PID:2956
  - - C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe
      "C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe" --type=gpu-process --disable-pack-loading --lang=en-US --log-file="C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\debug.log" --log-severity=disable --product-version="ReaderServices/19.10.20064 Chrome/64.0.3282.119" --gpu-preferences=GAAAAAAAAAAAB4AAAQAAAAAAAAAAAGAA --use-gl=swiftshader-webgl --gpu-vendor-id=0x1234 --gpu-device-id=0x1111 --gpu-driver-vendor="Google Inc." --gpu-driver-version=3.3.0.2 --gpu-driver-date=2017/04/07 --disable-pack-loading --lang=en-US --log-file="C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\debug.log" --log-severity=disable --product-version="ReaderServices/19.10.20064 Chrome/64.0.3282.119" --service-request-channel-token=CE351FCF03838DA51B3F63F22D914CA8 --mojo-platform-channel-handle=2344 --allow-no-sandbox-job --ignored=" --type=renderer " /prefetch:2
      4⤵
      PID:1436
  - - C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe
      "C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe" --type=renderer --disable-browser-side-navigation --disable-gpu-compositing --service-pipe-token=7845A3E22F55E09F82B746F87CB1F9CF --lang=en-US --disable-pack-loading --lang=en-US --log-file="C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\debug.log" --log-severity=disable --product-version="ReaderServices/19.10.20064 Chrome/64.0.3282.119" --enable-pinch --device-scale-factor=1 --num-raster-threads=1 --enable-gpu-async-worker-context --content-image-texture-target=0,0,3553;0,1,3553;0,2,3553;0,3,3553;0,4,3553;0,5,3553;0,6,3553;0,7,3553;0,8,3553;0,9,3553;0,10,3553;0,11,3553;0,12,3553;0,13,3553;0,14,3553;0,15,3553;0,16,3553;0,17,3553;0,18,3553;1,0,3553;1,1,3553;1,2,3553;1,3,3553;1,4,3553;1,5,3553;1,6,3553;1,7,3553;1,8,3553;1,9,3553;1,10,3553;1,11,3553;1,12,3553;1,13,3553;1,14,3553;1,15,3553;1,16,3553;1,17,3553;1,18,3553;2,0,3553;2,1,3553;2,2,3553;2,3,3553;2,4,3553;2,5,3553;2,6,3553;2,7,3553;2,8,3553;2,9,3553;2,10,3553;2,11,3553;2,12,3553;2,13,3553;2,14,3553;2,15,3553;2,16,3553;2,17,3553;2,18,3553;3,0,3553;3,1,3553;3,2,3553;3,3,3553;3,4,3553;3,5,3553;3,6,3553;3,7,3553;3,8,3553;3,9,3553;3,10,3553;3,11,3553;3,12,3553;3,13,3553;3,14,3553;3,15,3553;3,16,3553;3,17,3553;3,18,3553;4,0,3553;4,1,3553;4,2,3553;4,3,3553;4,4,3553;4,5,3553;4,6,3553;4,7,3553;4,8,3553;4,9,3553;4,10,3553;4,11,3553;4,12,3553;4,13,3553;4,14,3553;4,15,3553;4,16,3553;4,17,3553;4,18,3553;5,0,3553;5,1,3553;5,2,3553;5,3,3553;5,4,3553;5,5,3553;5,6,3553;5,7,3553;5,8,3553;5,9,3553;5,10,3553;5,11,3553;5,12,3553;5,13,3553;5,14,3553;5,15,3553;5,16,3553;5,17,3553;5,18,3553;6,0,3553;6,1,3553;6,2,3553;6,3,3553;6,4,3553;6,5,3553;6,6,3553;6,7,3553;6,8,3553;6,9,3553;6,10,3553;6,11,3553;6,12,3553;6,13,3553;6,14,3553;6,15,3553;6,16,3553;6,17,3553;6,18,3553 --disable-accelerated-video-decode --service-request-channel-token=7845A3E22F55E09F82B746F87CB1F9CF --renderer-client-id=8 --mojo-platform-channel-handle=2384 --allow-no-sandbox-job /prefetch:1
      4⤵
      PID:2976
- - C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe
    "C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe" --backgroundcolor=16514043
    3⤵
    PID:3256

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/772-133-0x0000000077E52000-0x0000000077E53000-memory.dmp

Filesize
4KB

Download
memory/900-125-0x0000000077E52000-0x0000000077E53000-memory.dmp

Filesize
4KB

Download
memory/960-122-0x000001D7E1E30000-0x000001D7E27F2000-memory.dmp

Filesize
9.8MB

Download
memory/960-123-0x000001D7E4460000-0x000001D7E4462000-memory.dmp

Filesize
8KB

Download
memory/1436-139-0x0000000077E52000-0x0000000077E53000-memory.dmp

Filesize
4KB

Download
memory/2228-128-0x0000000077E52000-0x0000000077E53000-memory.dmp

Filesize
4KB

Download
memory/2268-119-0x0000019B7AFB0000-0x0000019B7AFB2000-memory.dmp

Filesize
8KB

Download
memory/2268-118-0x0000019B78790000-0x0000019B788A2000-memory.dmp

Filesize
1.1MB

Download
memory/2956-136-0x0000000077E52000-0x0000000077E53000-memory.dmp

Filesize
4KB

Download
memory/2976-142-0x0000000077E52000-0x0000000077E53000-memory.dmp

Filesize
4KB

Download