guloader | f16104254e8fed34ed61afd2463d4c1f25e71f6758d92c87ce48a696d6da50a0

Analysis

max time kernel
121s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
01-11-2024 06:18

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General

Target

FUNDS TRANSFER - 000009442004 - OUTWARD PAYMENT ADVICE pdf.exe
Size

729KB
MD5

fb4e88fe6e801bd1770fa1b91ead7bfa
SHA1

3739fd72191b66dce2213abf4ae610ede85efbca
SHA256

c192c16aba9f5bb5ce6eca9e5fff24bbc290e5b820f94868466a61f6d0a2df8e
SHA512

388e96504ab2590600349a91066882a2ce5f3acf74431ae4d6b02475e443a660eb9f374380159f46384ab401bcd56cff053eac4c553ddfd1b767bfa0ea8e9ad2
SSDEEP

12288:DhoX5zcKxyCiN0DSNYCqbf07Ku7DdrJ++F6DJIG6pWu2PACkfwFLuz:Dw4U80DUY1bfyKQ9c+IDPhu2PAX7

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Loads dropped DLL 2 IoCs

Processes:

FUNDS TRANSFER - 000009442004 - OUTWARD PAYMENT ADVICE pdf.exe

pid	Process
628	FUNDS TRANSFER - 000009442004 - OUTWARD PAYMENT ADVICE pdf.exe
628	FUNDS TRANSFER - 000009442004 - OUTWARD PAYMENT ADVICE pdf.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

Processes:

WerFault.exe

pid	pid_target	Process	procid_target
2120	628	WerFault.exe	30

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

FUNDS TRANSFER - 000009442004 - OUTWARD PAYMENT ADVICE pdf.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FUNDS TRANSFER - 000009442004 - OUTWARD PAYMENT ADVICE pdf.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

FUNDS TRANSFER - 000009442004 - OUTWARD PAYMENT ADVICE pdf.exe

description	pid	Process	procid_target
PID 628 wrote to memory of 2120	628	FUNDS TRANSFER - 000009442004 - OUTWARD PAYMENT ADVICE pdf.exe	31
PID 628 wrote to memory of 2120	628	FUNDS TRANSFER - 000009442004 - OUTWARD PAYMENT ADVICE pdf.exe	31
PID 628 wrote to memory of 2120	628	FUNDS TRANSFER - 000009442004 - OUTWARD PAYMENT ADVICE pdf.exe	31
PID 628 wrote to memory of 2120	628	FUNDS TRANSFER - 000009442004 - OUTWARD PAYMENT ADVICE pdf.exe	31

C:\Users\Admin\AppData\Local\Temp\FUNDS TRANSFER - 000009442004 - OUTWARD PAYMENT ADVICE pdf.exe
"C:\Users\Admin\AppData\Local\Temp\FUNDS TRANSFER - 000009442004 - OUTWARD PAYMENT ADVICE pdf.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:628
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 628 -s 524
  2⤵
  - Program crash
  PID:2120

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\BooConf.ini

Filesize
45B

MD5
8b9fc0443d7e48145e2d4b37afb2d37b

SHA1
64a5718a478a38ac262d2e46da81d0e88c122a0f

SHA256
4f743978ead44260f895c983689d718e31ca826161c447d205021a9d3e010afa

SHA512
5126da1d29f662465241c8b51b95783df3f88c8feb8bb1b65dcf354738c48aab4bfb6c0035dfe6b40fa03ae5aaba8f72f1c31343aec7d4edb9c6ebcc773cc3d3

Download Submit
\Users\Admin\AppData\Local\Temp\nsyE457.tmp\System.dll

Filesize
11KB

MD5
c61501f07cf09bcfcdfe4cc8a1ebbbe3

SHA1
e8581b4359651b857646ae727efaaef372daa0fc

SHA256
7e75f148920db6300dad5a1c12fd5d6eecc95698a310a01311181bc98a704d55

SHA512
9837abe7ec3fa0f1f5193968d12b7ca1893e34eddf628db1f7ab6715b4de339231f0ec1b5f0f86c767f5a30c40da5c4a95e99deedd22eece93cb0d00539aad24

Download Submit
memory/628-27-0x0000000003990000-0x0000000005C56000-memory.dmp

Filesize
34.8MB

Download
memory/628-28-0x0000000003990000-0x0000000005C56000-memory.dmp

Filesize
34.8MB

Download