fatalrat | 6f6faa5381a18a7b1cae1741bcf915d69bf7e2af2eb44f9446d15266939d4879

Analysis

max time kernel
581s
max time network
599s
platform
windows10-2004_x64
resource
win10v2004-20231130-en
resource tags

arch:x64arch:x86image:win10v2004-20231130-enlocale:en-usos:windows10-2004-x64system
submitted
12/12/2023, 22:17

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General

Target

ChromeaSetup.exe
Size

88.1MB
MD5

1001791903c0dbd515877048a8508660
SHA1

9994e2b120b8c61035032036694827c105c2b9ea
SHA256

0476986195147a51e7f0b70050b27f73a0de46e2595b8c27eca4ad43064e8cb4
SHA512

6f81497f9bebf5f20a74a30bed9b5474a3d82af3015303ed9008cadec511a5c7741aa00c9d0f9918c5421806c532090182ed280a95709f99bd087384d302d918
SSDEEP

1572864:pHY4l+VZmS5afHwG1znyDUmd5KrwJNYGyMToUWT0fB5aPvJd13Ev0Lsmu:p44lSZ15afHwCtmGrsNYRMMb0JU9EvJ

Score

10^/10

fatalrat discovery infostealer rat

Malware Config

Signatures

FatalRat
FatalRat is a modular infostealer family written in C++ first appearing in June 2021.
infostealer rat fatalrat

Fatal Rat payload 1 IoCs

rat infostealer

resource	yara_rule
behavioral1/memory/4356-240-0x0000000010000000-0x000000001002A000-memory.dmp	fatalrat

Executes dropped EXE 5 IoCs

pid	Process
3980	ChromeaSetup.tmp
4408	setup.exe
4356	install.exe
740	mstcs.exe
4236	mstcs.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 4 IoCs

description	ioc	Process
File opened for modification	C:\WINDOWS\SysWOW64\1.bin	mstcs.exe
File created	C:\WINDOWS\SysWOW64\1.bin	setup.exe
File opened for modification	C:\WINDOWS\SysWOW64\1.bin	install.exe
File opened for modification	C:\WINDOWS\SysWOW64\1.bin	mstcs.exe

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

System Information Discovery
T1082

Modifies data under HKEY_USERS 16 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Policies\System	mstcs.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion	mstcs.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Policies\System	mstcs.exe
Key created	\REGISTRY\USER\.DEFAULT\System\CurrentControlSet\Services	mstcs.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\System\CurrentControlSet\Services\UmRdqaServce\Group = "Fatal"	mstcs.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\System\CurrentControlSet\Services\UmRdqaServce\InstallTime = "2023-12-12 22:20"	mstcs.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableLockWorkstation = "1"	mstcs.exe
Key created	\REGISTRY\USER\.DEFAULT\SYSTEM	mstcs.exe
Key created	\REGISTRY\USER\.DEFAULT\System\CurrentControlSet	mstcs.exe
Key created	\REGISTRY\USER\.DEFAULT\Software	mstcs.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft	mstcs.exe
Key created	\REGISTRY\USER\.DEFAULT\SYSTEM\CurrentControlSet\Services\UmRdqaServce	mstcs.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows	mstcs.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Policies	mstcs.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableLockWorkstation = "1"	mstcs.exe
Key created	\REGISTRY\USER\.DEFAULT\System\CurrentControlSet\Services\UmRdqaServce	mstcs.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3980	ChromeaSetup.tmp
3980	ChromeaSetup.tmp

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4356	install.exe
Token: SeDebugPrivilege	740	mstcs.exe
Token: SeDebugPrivilege	4236	mstcs.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3980	ChromeaSetup.tmp

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
4408	setup.exe
4356	install.exe
740	mstcs.exe
4236	mstcs.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 5084 wrote to memory of 3980	5084	ChromeaSetup.exe	90
PID 5084 wrote to memory of 3980	5084	ChromeaSetup.exe	90
PID 5084 wrote to memory of 3980	5084	ChromeaSetup.exe	90
PID 3980 wrote to memory of 4408	3980	ChromeaSetup.tmp	99
PID 3980 wrote to memory of 4408	3980	ChromeaSetup.tmp	99
PID 3980 wrote to memory of 4408	3980	ChromeaSetup.tmp	99
PID 3980 wrote to memory of 4356	3980	ChromeaSetup.tmp	100
PID 3980 wrote to memory of 4356	3980	ChromeaSetup.tmp	100
PID 3980 wrote to memory of 4356	3980	ChromeaSetup.tmp	100
PID 740 wrote to memory of 4236	740	mstcs.exe	103
PID 740 wrote to memory of 4236	740	mstcs.exe	103
PID 740 wrote to memory of 4236	740	mstcs.exe	103

C:\Users\Admin\AppData\Local\Temp\ChromeaSetup.exe
"C:\Users\Admin\AppData\Local\Temp\ChromeaSetup.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5084
- C:\Users\Admin\AppData\Local\Temp\is-J7SKC.tmp\ChromeaSetup.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-J7SKC.tmp\ChromeaSetup.tmp" /SL5="$120056,91486196,830976,C:\Users\Admin\AppData\Local\Temp\ChromeaSetup.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of WriteProcessMemory
  PID:3980
- - C:\ProgramData\setup.exe
    "C:\ProgramData\setup.exe" setup
    3⤵
    - Executes dropped EXE
    - Drops file in System32 directory
    - Suspicious use of SetWindowsHookEx
    PID:4408
- - C:\ProgramData\install.exe
    "C:\ProgramData\install.exe" setup
    3⤵
    - Executes dropped EXE
    - Drops file in System32 directory
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:4356

C:\ProgramData\mstcs.exe
C:\ProgramData\mstcs.exe
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:740
- C:\ProgramData\mstcs.exe
  C:\ProgramData\mstcs.exe Win7
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Modifies data under HKEY_USERS
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:4236

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

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:\ProgramData\Chrome\chrome.exe

Filesize
2.4MB

MD5
a98d71eb1bec5d38549b2155a3e54008

SHA1
8bfc5af325534d4b4b690c4883e27e3d005eee20

SHA256
e6d9df99f3bce911f8241e4e40784288b879b93feaeb5edddb1cb4e0cac675f8

SHA512
6d8ff316d02b3a0e0943f1833076f8e277b3ba6d602fcd3ecf58687f6753d2b5e21bcfcc6c1b7d182219a532f709f37281eb44a9759f4cdc569498aeb27fe244

Download Submit
C:\ProgramData\install.exe

Filesize
452KB

MD5
0ae239225c43476e8b8f2c2ddaecc208

SHA1
4a1933a2dd85df838a967e5796bf2420efbecbd6

SHA256
052e2bff4f4505ad9e3f488823d6125fe8c59b5ac030c7db64db7d7b9f6f5abd

SHA512
8a55ca9753d25e2a532565f719b48cb7c4f866a29e5cb6d37079184c32990cfae12c0f905d811a464db44bb51f72ecdc01466137e10d89d3f89631a29f4ef9fa

Download Submit
C:\ProgramData\install.exe

Filesize
256KB

MD5
21fb0c294faf4293f951bdd039a37734

SHA1
3a24f2895c9c602f998e864c47f40d2df2fa8ab8

SHA256
78f9772ca9d2a416a109d8b78b22d42fb0ede382628323d632893855338af63e

SHA512
a1401df0c639c1255ead94cfdb94bb95fe606edd4d2d259592d85a96e230ab46f0fb496518525c9dfb1ef8984f828f8782788f6ca1b859ad1f9308bb722a90c6

Download Submit
C:\ProgramData\mstcs.exe

Filesize
1.9MB

MD5
ff504e5889e75cd35713f531a837bf82

SHA1
1f47e5560a84e6ed0f172660c9882ddd751d7f18

SHA256
b99100e9b989224546d18df21ea90b5c9fa0fe00a098873befdf4afdefe0ab7c

SHA512
211c79bd716eeaaa4a8a042bdaa01e5b77081f0d090c9595ffcc6960def13f81d3bc15df4bf58847ef97d7858b98c050935207ccbf4a880585a79ecfd94ced31

Download Submit
C:\ProgramData\setup.exe

Filesize
448KB

MD5
ac7e8db11e77d0c23ee92eee3f430da9

SHA1
df75b6e0749b5ef26cf4473a557e7ba22094dacf

SHA256
26888e7aa2f606dfb23c0cb200f4bf1555bbe65a30d2735657938d86cf2c90a8

SHA512
fdd3526cfab858f6cbfe6acf7c57031a294557ae5e9d3f2b01d4676c9504a626971f692dd03c6c66e0eb3ed9378ee26ae222da00c6a4815c905026bba727c91d

Download Submit
C:\ProgramData\setup.exe

Filesize
896KB

MD5
d908272ebe4657659f38da46b1f2c86d

SHA1
5c1130eeb58681d4d920a05145aeeb92a4761b21

SHA256
48379cd147b97ff76afe88e527f5680f881083140224bda5759cf1ffffcc09f8

SHA512
77f4219f825e97a950246db7379981a5a782e3ef6a210f57c18db7f2eddc67a0eba30db34dc42639121323d8462da9a68db1984e849c19256083e1f23834500a

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-J7SKC.tmp\ChromeaSetup.tmp

Filesize
3.0MB

MD5
3eac63e18f4808b72e360e5e00b44841

SHA1
d77da45097a6d456e3cd240c3dc8962403dd6cf2

SHA256
6a3af360ef6d716a8cc1a2da7f2737ffbae99b5b1c5a70fa1677c8f79a6c0b9b

SHA512
2ee842af9726c701a52e76714aa4e408eb27493a794c25cfb1748fe071b637efa46a8fafecfd9be8d02473070adc09e503339ac32e6a7b16cdad7fe61978ee07

Download Submit
C:\WINDOWS\SysWOW64\1.bin

Filesize
66KB

MD5
6e0a1ae63b6c4df84585567286181195

SHA1
158c05ea9ce20d57ac27bf60032b1432ea26fc9b

SHA256
98f03f88b23c4f1a3d3dc9d0dc7cf5fd09e58e989ce976452d85f623e1afa740

SHA512
151b05a383c2a84b8cf03bf2fc951c09f54fa39d8ed4e61f5ed2510af43f26902494d30882c340206f3bbba3995ed1f09ec76a7162324da2d08d414c5bc20eb4

Download Submit
C:\WINDOWS\SysWOW64\1.bin

Filesize
209KB

MD5
a7123c81c4ef7078afb1be30ce84c4bb

SHA1
489fab1e550794d008dfcc70fa0861bd59c6294c

SHA256
3978149da04b5be63c52e51b14e54a0d52bd2be1ac51b11d3565b0841173c31f

SHA512
5295517096877f63c8296c049764663b508d3add1c408f068c4b8d4542b822d198b57c41c395760d3856a62894eb476e317e81b67a45278d166f037c8380e9a6

Download Submit
memory/3980-9-0x0000000000400000-0x0000000000714000-memory.dmp

Filesize
3.1MB

Download
memory/3980-57-0x0000000000400000-0x0000000000714000-memory.dmp

Filesize
3.1MB

Download
memory/3980-12-0x0000000000E90000-0x0000000000E91000-memory.dmp

Filesize
4KB

Download
memory/3980-6-0x0000000000E90000-0x0000000000E91000-memory.dmp

Filesize
4KB

Download
memory/3980-264-0x0000000000400000-0x0000000000714000-memory.dmp

Filesize
3.1MB

Download
memory/3980-266-0x0000000000400000-0x0000000000714000-memory.dmp

Filesize
3.1MB

Download
memory/4356-239-0x0000000002B00000-0x0000000002B35000-memory.dmp

Filesize
212KB

Download
memory/4356-240-0x0000000010000000-0x000000001002A000-memory.dmp

Filesize
168KB

Download
memory/4408-238-0x00000000025D0000-0x0000000002605000-memory.dmp

Filesize
212KB

Download
memory/5084-0-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download
memory/5084-8-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download
memory/5084-2-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download
memory/5084-267-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download