guloader | 852a0d477d29d18d5b7c419e4d64a90761e04c908fc7171e2faab5ad40021fbc

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 01:55

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General

Target

xerox322200524.exe
Size

464KB
MD5

5b578b597f4f4eef57eda996ee33cdb6
SHA1

efdb66166e1a45e9a30c67bc6d80e42f843b5604
SHA256

285009b0e71742b5fbe9407dcb25e378d35c2b9eab33f51618b46b647878c60d
SHA512

a7cc33e0e73c5c821d66a2ce437dfcd1ae8074161e3cafb9c2668dd3e411fc4073e1161f8781a17bbb3c8af29f210b9c3b7cf9d7a534fb278fc54ae4eabdeea3
SSDEEP

12288:vi3hR5SANiItEOU79Uhua4g8Do3BMJSojhvnH3:K3hv5iIizUhH4g8eqSqd3

Score

10^/10

guloader downloader

Malware Config

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Loads dropped DLL 3 IoCs

pid	Process
4052	xerox322200524.exe
4052	xerox322200524.exe
4052	xerox322200524.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
4052	xerox322200524.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3548	4052	WerFault.exe	83

C:\Users\Admin\AppData\Local\Temp\xerox322200524.exe
"C:\Users\Admin\AppData\Local\Temp\xerox322200524.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
PID:4052
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4052 -s 1060
  2⤵
  - Program crash
  PID:3548

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 4052 -ip 4052
1⤵
PID:4276

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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\nsk3903.tmp\BgImage.dll

Filesize
7KB

MD5
9436196007f65f0ae96f64b1c8b2572e

SHA1
4b004b5c2865c9450876be83faa8cc96e1d12c01

SHA256
286f246ee18bf91c4a80fa2cdb61077a4bcf0a3fd6582be4b4ab6a5cb3de44c9

SHA512
5c172675fbbea214471ac35eebaa6ab9bd1306268144085adbad3bba4a815430ed028cac169e8b5a6fd00818684f65d7bdd32f11773bc6152e62ef80f895d35e

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsk3903.tmp\System.dll

Filesize
11KB

MD5
8b3830b9dbf87f84ddd3b26645fed3a0

SHA1
223bef1f19e644a610a0877d01eadc9e28299509

SHA256
f004c568d305cd95edbd704166fcd2849d395b595dff814bcc2012693527ac37

SHA512
d13cfd98db5ca8dc9c15723eee0e7454975078a776bce26247228be4603a0217e166058ebadc68090afe988862b7514cb8cb84de13b3de35737412a6f0a8ac03

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsk3903.tmp\nsDialogs.dll

Filesize
9KB

MD5
82c3f38cd34739872af07443c65d0bd8

SHA1
1f4ee2d394404a291eda6419f856adaf4b960237

SHA256
59cdb2c12d5635fd25af4007b70222507948be41fa9885b7f07967c2510a5311

SHA512
3a81c0613b1ea906ad4f103b02620217de69a8676dbb7ec41cf31f342a0a74562815a8d4f2efe9866fc16365f58524ac71652e99920acea355f020028775743d

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Printer Shortcuts\Krydsrevisionernes.lnk

Filesize
902B

MD5
09a0e8fd105017f435df611a76abc6ba

SHA1
652cc35f713838740d968e775f722905975c22ce

SHA256
4afd0cc39070d2cd073f73aaf9105ff9699f7643ee8d5fd5496bf0e2378c886a

SHA512
404ce29a674dda5d00f4e6dbb12885f9d6b5f1e28b467749dcd07b610661e6a74843418eb515c25db14046d4c6d607d70ad8d572790e7a3802d8e16598d9431b

Download Submit
memory/4052-45-0x0000000004350000-0x0000000005FCB000-memory.dmp

Filesize
28.5MB

Download
memory/4052-46-0x0000000077D81000-0x0000000077EA1000-memory.dmp

Filesize
1.1MB

Download
memory/4052-47-0x0000000004350000-0x0000000005FCB000-memory.dmp

Filesize
28.5MB

Download