crimsonrat | e3844f43afbc510d0b5c6f77e482711bbbb3dcae8e04b2f7200a11eff27c029d

Analysis

max time kernel
158s
max time network
158s
platform
windows10_x64
resource
win10-en-20211208
submitted
21/01/2022, 23:00

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General

Target

BHC-PR/British High Commission Rhinnon Mills.exe
Size

687KB
MD5

41120771530675f31125936f630d7a67
SHA1

9f55015e9bfbb65f0a5b2ad8deaea1df67660fec
SHA256

1bf6dc9af6dd730120f598d02f139f5a7776993afe29679f83a3d2fda3599736
SHA512

62c4c55cf8b9c987c064300210ce746242565d4e3b0ff0008cbcf5fac4668e4cc14d007caa697dcb3774fb1ec679646cb4bff3f012ef0e104870277fcd5f7e58

Score

10^/10

crimsonrat rat

Malware Config

Signatures

CrimsonRAT Main Payload 2 IoCs

resource	yara_rule
behavioral10/files/0x000600000001ab3e-158.dat	family_crimsonrat
behavioral10/files/0x000600000001ab3e-159.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
652	rnthiavesa.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-1-5-21-369956170-74428499-1628131376-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION	AcroRd32.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings	British High Commission Rhinnon Mills.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
4288	AcroRd32.exe
4288	AcroRd32.exe
4288	AcroRd32.exe
4288	AcroRd32.exe
4288	AcroRd32.exe
4288	AcroRd32.exe
4288	AcroRd32.exe
4288	AcroRd32.exe
4288	AcroRd32.exe
4288	AcroRd32.exe
4288	AcroRd32.exe
4288	AcroRd32.exe
4288	AcroRd32.exe
4288	AcroRd32.exe
4288	AcroRd32.exe
4288	AcroRd32.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4288	AcroRd32.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
4288	AcroRd32.exe
4288	AcroRd32.exe
4288	AcroRd32.exe
4288	AcroRd32.exe
4288	AcroRd32.exe
4288	AcroRd32.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 3440 wrote to memory of 4288	3440	British High Commission Rhinnon Mills.exe	69
PID 3440 wrote to memory of 4288	3440	British High Commission Rhinnon Mills.exe	69
PID 3440 wrote to memory of 4288	3440	British High Commission Rhinnon Mills.exe	69
PID 3440 wrote to memory of 652	3440	British High Commission Rhinnon Mills.exe	70
PID 3440 wrote to memory of 652	3440	British High Commission Rhinnon Mills.exe	70
PID 4288 wrote to memory of 1772	4288	AcroRd32.exe	71
PID 4288 wrote to memory of 1772	4288	AcroRd32.exe	71
PID 4288 wrote to memory of 1772	4288	AcroRd32.exe	71
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 5020	1772	RdrCEF.exe	72
PID 1772 wrote to memory of 2856	1772	RdrCEF.exe	73
PID 1772 wrote to memory of 2856	1772	RdrCEF.exe	73
PID 1772 wrote to memory of 2856	1772	RdrCEF.exe	73
PID 1772 wrote to memory of 2856	1772	RdrCEF.exe	73
PID 1772 wrote to memory of 2856	1772	RdrCEF.exe	73
PID 1772 wrote to memory of 2856	1772	RdrCEF.exe	73
PID 1772 wrote to memory of 2856	1772	RdrCEF.exe	73
PID 1772 wrote to memory of 2856	1772	RdrCEF.exe	73
PID 1772 wrote to memory of 2856	1772	RdrCEF.exe	73
PID 1772 wrote to memory of 2856	1772	RdrCEF.exe	73
PID 1772 wrote to memory of 2856	1772	RdrCEF.exe	73
PID 1772 wrote to memory of 2856	1772	RdrCEF.exe	73
PID 1772 wrote to memory of 2856	1772	RdrCEF.exe	73

C:\Users\Admin\AppData\Local\Temp\BHC-PR\British High Commission Rhinnon Mills.exe
"C:\Users\Admin\AppData\Local\Temp\BHC-PR\British High Commission Rhinnon Mills.exe"
1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3440
- 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\British High Commission Rhinnon Mills-03-.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:4288
- - 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:1772
  - - 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=3826FF37FC486521C7B42CFD563A3347 --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=3826FF37FC486521C7B42CFD563A3347 --renderer-client-id=2 --mojo-platform-channel-handle=1644 --allow-no-sandbox-job /prefetch:1
      4⤵
      PID:5020
  - - 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=FBF68C48FC127312367DCA5C6A1869EE --mojo-platform-channel-handle=1792 --allow-no-sandbox-job --ignored=" --type=renderer " /prefetch:2
      4⤵
      PID:2856
  - - 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=41D3186009B3F087028DF55360B918A6 --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=41D3186009B3F087028DF55360B918A6 --renderer-client-id=4 --mojo-platform-channel-handle=2080 --allow-no-sandbox-job /prefetch:1
      4⤵
      PID:668
  - - 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=00E0A9C19A59A98652C12ECB9A3FB0F5 --mojo-platform-channel-handle=2204 --allow-no-sandbox-job --ignored=" --type=renderer " /prefetch:2
      4⤵
      PID:4636
  - - 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=4C1BF3C77DEF198A8257D3CA1136FC6D --mojo-platform-channel-handle=2468 --allow-no-sandbox-job --ignored=" --type=renderer " /prefetch:2
      4⤵
      PID:2152
  - - 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=5AACA2B2D2DAC3E73DE876CC362427B4 --mojo-platform-channel-handle=2244 --allow-no-sandbox-job --ignored=" --type=renderer " /prefetch:2
      4⤵
      PID:1412
- C:\ProgramData\Hanthavra\rnthiavesa.exe
  "C:\ProgramData\Hanthavra\rnthiavesa.exe"
  2⤵
  - Executes dropped EXE
  PID:652

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/652-165-0x000001B472A50000-0x000001B4733FA000-memory.dmp

Filesize
9.7MB

Download
memory/652-175-0x000001B474EC0000-0x000001B474ED0000-memory.dmp

Filesize
64KB

Download
memory/668-311-0x0000000077042000-0x0000000077043000-memory.dmp

Filesize
4KB

Download
memory/1412-322-0x0000000077042000-0x0000000077043000-memory.dmp

Filesize
4KB

Download
memory/2152-319-0x0000000077042000-0x0000000077043000-memory.dmp

Filesize
4KB

Download
memory/2856-305-0x0000000077042000-0x0000000077043000-memory.dmp

Filesize
4KB

Download
memory/3440-115-0x0000000000F40000-0x0000000000F42000-memory.dmp

Filesize
8KB

Download
memory/4636-316-0x0000000077042000-0x0000000077043000-memory.dmp

Filesize
4KB

Download
memory/5020-303-0x0000000077042000-0x0000000077043000-memory.dmp

Filesize
4KB

Download