8faa72093f10d253f67ffc2b4589bb5b2baade75729e5887a52ccc75aae50619

Analysis

max time kernel
100s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
20/10/2022, 12:20

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General

Target

ͨCFCAؼ v3.4.0.4/CryptoKit.AmericanExpress.x64.exe
Size

747KB
MD5

fe48508635c0f38d53acf80713ecf463
SHA1

3697f5d2a0f7a8e8dbc71b21e52f3676de2ac8f8
SHA256

d9fe28b4399aafc7c5c666d066bbbf9d56ac62197884c348bcbab6bb57cb8896
SHA512

5e2804c139d8e80177fb9f9e6f804f7bdd8afffd251abe994d4de6430a413d7805dc57287bbdf7733f411a4a224c067ee838ad2dbadf2f0844c2b9572ee04e32
SSDEEP

12288:3zZ4UjD5HOMZUpS2lmLrt06x6tKPIh8cR6Sr67idYHUZ6d25PlJKkBy5Y+Z:3zZfOMZUpRmLrt06YtKPIh8M3r67lS6P

Score

8^/10

discovery persistence

Malware Config

Signatures

Registers COM server for autorun 1 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{46B713A2-C992-4AE7-A56C-0A935CBF238E}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{46B713A2-C992-4AE7-A56C-0A935CBF238E}\InprocServer32\ = "C:\\Windows\\system32\\CryptoKit.AmericanExpress.x64.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{46B713A2-C992-4AE7-A56C-0A935CBF238E}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe

Loads dropped DLL 2 IoCs

pid	Process
1792	CryptoKit.AmericanExpress.x64.exe
2032	regsvr32.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\system32\CryptoKit.AmericanExpress.x64.dll	CryptoKit.AmericanExpress.x64.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\CFCA\CryptoKit.AmericanExpress.x64\uninst.exe	CryptoKit.AmericanExpress.x64.exe

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

System Information Discovery
T1082

Modifies registry class 46 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{012863A9-0C22-49B9-BAEF-C5C33C0D4459}\1.0\FLAGS	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{012863A9-0C22-49B9-BAEF-C5C33C0D4459}\1.0\0\win64	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{012863A9-0C22-49B9-BAEF-C5C33C0D4459}\1.0\0\win64\ = "C:\\Windows\\system32\\CryptoKit.AmericanExpress.x64.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{012863A9-0C22-49B9-BAEF-C5C33C0D4459}\1.0\HELPDIR\ = "C:\\Windows\\system32"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{46B713A2-C992-4AE7-A56C-0A935CBF238E}\ = "CryptoAgent Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{46B713A2-C992-4AE7-A56C-0A935CBF238E}\ProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{012863A9-0C22-49B9-BAEF-C5C33C0D4459}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{F3F42EA7-1E7A-4AFE-8C5D-F5A8D372B8DB}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{F3F42EA7-1E7A-4AFE-8C5D-F5A8D372B8DB}\TypeLib\Version = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CryptoKit.CryptoAgent	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{46B713A2-C992-4AE7-A56C-0A935CBF238E}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{012863A9-0C22-49B9-BAEF-C5C33C0D4459}\1.0	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{F3F42EA7-1E7A-4AFE-8C5D-F5A8D372B8DB}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{F3F42EA7-1E7A-4AFE-8C5D-F5A8D372B8DB}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{F3F42EA7-1E7A-4AFE-8C5D-F5A8D372B8DB}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{46B713A2-C992-4AE7-A56C-0A935CBF238E}\VersionIndependentProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{46B713A2-C992-4AE7-A56C-0A935CBF238E}\TypeLib\ = "{012863A9-0C22-49B9-BAEF-C5C33C0D4459}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CryptoKit.CryptoAgent\ = "CryptoAgent Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{46B713A2-C992-4AE7-A56C-0A935CBF238E}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{012863A9-0C22-49B9-BAEF-C5C33C0D4459}\1.0\0	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{012863A9-0C22-49B9-BAEF-C5C33C0D4459}\1.0\HELPDIR	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{F3F42EA7-1E7A-4AFE-8C5D-F5A8D372B8DB}\ = "ICryptoAgent"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{F3F42EA7-1E7A-4AFE-8C5D-F5A8D372B8DB}\TypeLib\ = "{012863A9-0C22-49B9-BAEF-C5C33C0D4459}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CryptoKit.CryptoAgent.1	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CryptoKit.CryptoAgent.1\CLSID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{46B713A2-C992-4AE7-A56C-0A935CBF238E}\InprocServer32\ = "C:\\Windows\\system32\\CryptoKit.AmericanExpress.x64.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{F3F42EA7-1E7A-4AFE-8C5D-F5A8D372B8DB}\TypeLib\ = "{012863A9-0C22-49B9-BAEF-C5C33C0D4459}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{F3F42EA7-1E7A-4AFE-8C5D-F5A8D372B8DB}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{F3F42EA7-1E7A-4AFE-8C5D-F5A8D372B8DB}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{46B713A2-C992-4AE7-A56C-0A935CBF238E}\ProgID\ = "CryptoKit.CryptoAgent.1"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{46B713A2-C992-4AE7-A56C-0A935CBF238E}\VersionIndependentProgID\ = "CryptoKit.CryptoAgent"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CryptoKit.CryptoAgent\CurVer	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{F3F42EA7-1E7A-4AFE-8C5D-F5A8D372B8DB}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{012863A9-0C22-49B9-BAEF-C5C33C0D4459}\1.0\FLAGS\ = "0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{F3F42EA7-1E7A-4AFE-8C5D-F5A8D372B8DB}\ProxyStubClsid32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{F3F42EA7-1E7A-4AFE-8C5D-F5A8D372B8DB}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{46B713A2-C992-4AE7-A56C-0A935CBF238E}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{012863A9-0C22-49B9-BAEF-C5C33C0D4459}\1.0\ = "CryptoKit.AmericanExpress.x64 3.0 Type Library"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CryptoKit.CryptoAgent\CLSID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CryptoKit.CryptoAgent\CLSID\ = "{46B713A2-C992-4AE7-A56C-0A935CBF238E}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CryptoKit.CryptoAgent\CurVer\ = "CryptoKit.CryptoAgent.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{46B713A2-C992-4AE7-A56C-0A935CBF238E}\Programmable	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{46B713A2-C992-4AE7-A56C-0A935CBF238E}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{F3F42EA7-1E7A-4AFE-8C5D-F5A8D372B8DB}\ = "ICryptoAgent"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CryptoKit.CryptoAgent.1\ = "CryptoAgent Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CryptoKit.CryptoAgent.1\CLSID\ = "{46B713A2-C992-4AE7-A56C-0A935CBF238E}"	regsvr32.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1792 wrote to memory of 2032	1792	CryptoKit.AmericanExpress.x64.exe	83
PID 1792 wrote to memory of 2032	1792	CryptoKit.AmericanExpress.x64.exe	83

C:\Users\Admin\AppData\Local\Temp\ͨCFCAؼ v3.4.0.4\CryptoKit.AmericanExpress.x64.exe
"C:\Users\Admin\AppData\Local\Temp\ͨCFCAؼ v3.4.0.4\CryptoKit.AmericanExpress.x64.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:1792
- C:\Windows\system32\regsvr32.exe
  "regsvr32.exe" "C:\Windows\system32\CryptoKit.AmericanExpress.x64.dll" /s
  2⤵
  - Registers COM server for autorun
  - Loads dropped DLL
  - Modifies registry class
  PID:2032

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

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

C:\Users\Admin\AppData\Local\Temp\nsg2413.tmp\System.dll

Filesize
11KB

MD5
959ea64598b9a3e494c00e8fa793be7e

SHA1
40f284a3b92c2f04b1038def79579d4b3d066ee0

SHA256
03cd57ab00236c753e7ddeee8ee1c10839ace7c426769982365531042e1f6f8b

SHA512
5e765e090f712beffce40c5264674f430b08719940d66e3a4d4a516fd4ade859f7853f614d9d6bbb602780de54e11110d66dbb0f9ca20ef6096ede531f9f6d64

Download Submit
C:\Windows\System32\CryptoKit.AmericanExpress.x64.dll

Filesize
1.4MB

MD5
c8b24d96f964062635de3b322fddf246

SHA1
d9f984a22273d4a7c4b2a8d5f14210683b44a9be

SHA256
a25b6c064dda554064f6217aca87083fd27d8f54e40dd27dfeaa7b251cc93665

SHA512
d5febcdcece0501f7ccdf882a31196c1915c813e5b0175a123b69aa2ceb4d73706abdf4720ad5ac63e906b41582b28aee3f24ec6218b633dc0de840127b59c32

Download Submit
C:\Windows\system32\CryptoKit.AmericanExpress.x64.dll

Filesize
1.4MB

MD5
c8b24d96f964062635de3b322fddf246

SHA1
d9f984a22273d4a7c4b2a8d5f14210683b44a9be

SHA256
a25b6c064dda554064f6217aca87083fd27d8f54e40dd27dfeaa7b251cc93665

SHA512
d5febcdcece0501f7ccdf882a31196c1915c813e5b0175a123b69aa2ceb4d73706abdf4720ad5ac63e906b41582b28aee3f24ec6218b633dc0de840127b59c32

Download Submit