guloader | 0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441

General

Target

0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe
Size

936KB
MD5

4561965a5e1e66d75ebb16a45d098c43
SHA1

0a087a7b9d6bba373df97b176122e8e2c11c6cea
SHA256

0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441
SHA512

617eaf92fe4c52fb3833cd348256558ebf9bef13325f2015af7fefd10a20ae65dd592298f3f330b370d7d22ccca2fcbfbc89f5866c2efef9c816efc86f3f4969
SSDEEP

24576:wD2EKNLaAYQNB24QAE4IBGTizPkY6/mMScs2:wD2EKNLCXN4IBKizPo/mMScs2

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 6 IoCs

pid	Process
1804	0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe
1804	0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe
1804	0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe
1804	0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe
1804	0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe
1804	0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
3748	0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1804	0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe
3748	0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1804 set thread context of 3748	1804	0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe	92

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
2228	3748	WerFault.exe	92

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	0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3748	0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe
3748	0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1804	0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1804 wrote to memory of 3748	1804	0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe	92
PID 1804 wrote to memory of 3748	1804	0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe	92
PID 1804 wrote to memory of 3748	1804	0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe	92
PID 1804 wrote to memory of 3748	1804	0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe	92
PID 1804 wrote to memory of 3748	1804	0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe	92

C:\Users\Admin\AppData\Local\Temp\0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe
"C:\Users\Admin\AppData\Local\Temp\0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1804
- C:\Users\Admin\AppData\Local\Temp\0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe
  "C:\Users\Admin\AppData\Local\Temp\0c90b170c457fe4656140750bef8331f0f7c195bf3acb378f8ec80a6a42a7441.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:3748
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3748 -s 1228
    3⤵
    - Program crash
    PID:2228

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3748 -ip 3748
1⤵
PID:312

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\nsvC758.tmp\LangDLL.dll

Filesize
5KB

MD5
61f69388ae89d61a3d838cbcf81b4f82

SHA1
e595c0236a373a6ac79c334dc183ee03ca8f8ecd

SHA256
d65875bb4bc121f81384d55fde90dd9eb9ad1878cd8a02bcb5c8a933c3987a61

SHA512
21d34738cc21c1ef6b0ef1ac53659cdab224bbc20ea983f9a952a2cb4b5785a07bb18c0acf22a0d12a94795e1fc6d314f442c923bb1a93b675edac8c6aacf469

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsvC758.tmp\System.dll

Filesize
11KB

MD5
4ca4fd3fbefa2f6e87e6e9ee87d1c0b3

SHA1
7cdbeb5ff2b14b86af04e075d0ca651183ea5df4

SHA256
d09a8b3ade4ba4b7292c0b3da1bcb4b6c6e2012e0ccfd5e029a54af73a9e1b57

SHA512
cf0f415a97fdc74568297fed4f1295d0d2aef487a308141144ef8d5f04c669ef4795c273e745b81065429adde113fcdedf4c22717a7aeef60fdcd8d4d46f97f8

Download Submit
memory/1804-29-0x0000000004A20000-0x0000000005909000-memory.dmp

Filesize
14.9MB

Download
memory/1804-30-0x0000000076FE1000-0x0000000077101000-memory.dmp

Filesize
1.1MB

Download
memory/1804-32-0x0000000073E44000-0x0000000073E45000-memory.dmp

Filesize
4KB

Download
memory/1804-31-0x0000000004A20000-0x0000000005909000-memory.dmp

Filesize
14.9MB

Download
memory/1804-33-0x0000000004A20000-0x0000000005909000-memory.dmp

Filesize
14.9MB

Download
memory/3748-37-0x0000000077085000-0x0000000077086000-memory.dmp

Filesize
4KB

Download
memory/3748-41-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3748-36-0x0000000077068000-0x0000000077069000-memory.dmp

Filesize
4KB

Download
memory/3748-34-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3748-38-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3748-40-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/3748-39-0x0000000001660000-0x0000000002549000-memory.dmp

Filesize
14.9MB

Download
memory/3748-35-0x0000000001660000-0x0000000002549000-memory.dmp

Filesize
14.9MB

Download
memory/3748-42-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3748-43-0x0000000076FE1000-0x0000000077101000-memory.dmp

Filesize
1.1MB

Download
memory/3748-44-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/3748-45-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3748-46-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3748-47-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3748-48-0x0000000001660000-0x0000000002549000-memory.dmp

Filesize
14.9MB

Download

Analysis

Sharing