guloader | bf9b1fb1f7b689fb89ce8278aab22e89d4dd1bb889e1bf60d3b4bf591b40b5fd

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
26/03/2025, 12:30

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General

Target

Sigmanly_bf9b1fb1f7b689fb89ce8278aab22e89d4dd1bb889e1bf60d3b4bf591b40b5fd.exe
Size

918KB
MD5

61725da4f7825615b317de75818d8d54
SHA1

0049128804aadb3513087ff4648b690947a0a030
SHA256

bf9b1fb1f7b689fb89ce8278aab22e89d4dd1bb889e1bf60d3b4bf591b40b5fd
SHA512

86b0d280f57acb8e0d0e5dce151bfac84f28c3656af205788e67bfc3303f413302563481913261edc11a3edb98bcb9af777f3db1d1d548289b70630d598f3793
SSDEEP

24576:Cx04+OcBVME/7oHMkwTxRqs3lyA4WkBbzrkW:Cx044Br76wXqqoj

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

pid	Process
2368	Sigmanly_bf9b1fb1f7b689fb89ce8278aab22e89d4dd1bb889e1bf60d3b4bf591b40b5fd.exe
2368	Sigmanly_bf9b1fb1f7b689fb89ce8278aab22e89d4dd1bb889e1bf60d3b4bf591b40b5fd.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2368	Sigmanly_bf9b1fb1f7b689fb89ce8278aab22e89d4dd1bb889e1bf60d3b4bf591b40b5fd.exe
2832	Sigmanly_bf9b1fb1f7b689fb89ce8278aab22e89d4dd1bb889e1bf60d3b4bf591b40b5fd.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Sigmanly_bf9b1fb1f7b689fb89ce8278aab22e89d4dd1bb889e1bf60d3b4bf591b40b5fd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Sigmanly_bf9b1fb1f7b689fb89ce8278aab22e89d4dd1bb889e1bf60d3b4bf591b40b5fd.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2368	Sigmanly_bf9b1fb1f7b689fb89ce8278aab22e89d4dd1bb889e1bf60d3b4bf591b40b5fd.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2368 wrote to memory of 2832	2368	Sigmanly_bf9b1fb1f7b689fb89ce8278aab22e89d4dd1bb889e1bf60d3b4bf591b40b5fd.exe	31
PID 2368 wrote to memory of 2832	2368	Sigmanly_bf9b1fb1f7b689fb89ce8278aab22e89d4dd1bb889e1bf60d3b4bf591b40b5fd.exe	31
PID 2368 wrote to memory of 2832	2368	Sigmanly_bf9b1fb1f7b689fb89ce8278aab22e89d4dd1bb889e1bf60d3b4bf591b40b5fd.exe	31
PID 2368 wrote to memory of 2832	2368	Sigmanly_bf9b1fb1f7b689fb89ce8278aab22e89d4dd1bb889e1bf60d3b4bf591b40b5fd.exe	31
PID 2368 wrote to memory of 2832	2368	Sigmanly_bf9b1fb1f7b689fb89ce8278aab22e89d4dd1bb889e1bf60d3b4bf591b40b5fd.exe	31

C:\Users\Admin\AppData\Local\Temp\Sigmanly_bf9b1fb1f7b689fb89ce8278aab22e89d4dd1bb889e1bf60d3b4bf591b40b5fd.exe
"C:\Users\Admin\AppData\Local\Temp\Sigmanly_bf9b1fb1f7b689fb89ce8278aab22e89d4dd1bb889e1bf60d3b4bf591b40b5fd.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2368
- C:\Users\Admin\AppData\Local\Temp\Sigmanly_bf9b1fb1f7b689fb89ce8278aab22e89d4dd1bb889e1bf60d3b4bf591b40b5fd.exe
  "C:\Users\Admin\AppData\Local\Temp\Sigmanly_bf9b1fb1f7b689fb89ce8278aab22e89d4dd1bb889e1bf60d3b4bf591b40b5fd.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2832

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

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Downloads

\Users\Admin\AppData\Local\Temp\nsyC93A.tmp\System.dll

Filesize
11KB

MD5
a436db0c473a087eb61ff5c53c34ba27

SHA1
65ea67e424e75f5065132b539c8b2eda88aa0506

SHA256
75ed40311875312617d6711baed0be29fcaee71031ca27a8d308a72b15a51e49

SHA512
908f46a855480af6eacb2fb64de0e60b1e04bbb10b23992e2cf38a4cbebdcd7d3928c4c022d7ad9f7479265a8f426b93eef580afec95570e654c360d62f5e08d

Download Submit
memory/2368-28-0x0000000076D61000-0x0000000076E62000-memory.dmp

Filesize
1.0MB

Download
memory/2368-29-0x0000000076D60000-0x0000000076F09000-memory.dmp

Filesize
1.7MB

Download
memory/2832-30-0x00000000014E0000-0x00000000060AB000-memory.dmp

Filesize
75.8MB

Download
memory/2832-31-0x0000000076D60000-0x0000000076F09000-memory.dmp

Filesize
1.7MB

Download
memory/2832-32-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download