guloader | 55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821

General

Target
55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe
Size 1.1MB
Sample260801-eael8axclf
SHA256 55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821
MD5 f6a2345f0a35a4eb040ec97ddb2da126
SHA1 6c0b3fa962525580766e329c1538958804d7efd8
SHA512 d93286bb17522fb594302f8cfa08360fcb4eda38560d72634f80af6cdb25d276cfc12e3b114b754dd182069113726f1289af926960e13d0d71259e7b30910b57
SSDEEP 24576:0TAjLnngPTgXHKPb/FLqmY8mdGlO4wIsk6EL5:iGrgLhPb/FLqzglO44s
TLSH
T1CB35AFB63B780186FA3DB4B2FB56B17026E3107D556DF02E32B2EB5640217B2154FA6C
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery downloader guloader

Malware Config

Signatures

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

Loads dropped DLL 7 IoCs

pid	Process
1708	55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe
1708	55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe
1708	55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe
1708	55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe
1708	55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe
1708	55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe
1708	55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1708	55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe
752	55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Fonts\gabons.htm	55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.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	55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1708	55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1708 wrote to memory of 1064	1708	55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe	85
PID 1708 wrote to memory of 752	1708	55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe	86
PID 1708 wrote to memory of 752	1708	55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe	86
PID 752 wrote to memory of 1568	752	55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe	87

C:\Users\Admin\AppData\Local\Temp\55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe
"C:\Users\Admin\AppData\Local\Temp\55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1708
- C:\Users\Admin\AppData\Local\Temp\55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe
  "C:\Users\Admin\AppData\Local\Temp\55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe"
  2⤵
  PID:1064
- C:\Users\Admin\AppData\Local\Temp\55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe
  "C:\Users\Admin\AppData\Local\Temp\55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:752
- - C:\Users\Admin\AppData\Local\Temp\55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe
    "C:\Users\Admin\AppData\Local\Temp\55b96a791d1092846b3fc2ab30b4c2345252a88dce019ef18f3273e5852db821.exe"
    3⤵
    PID:1568

Network

MITRE ATT&CK Enterprise v16

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

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Downloads

LangDLL.dll

Path C:\Users\Admin\AppData\Local\Temp\nsq149D.tmp\LangDLL.dll
Size 5KB
SHA256 4cf25411f28f639f72156c24b0f66ea42f5aee5973f6c137d901da6ae42d5b7e
MD5 4b8a750993567ac9a350ba9768fabfa0
SHA1 7ee7a8c313b292d62561b085c9d490c0f8065624
SHA512 c2a06e352815a2f5340e8244cf2c5a4a5cd7e7848ea67e454ab207262cb33130008491e83d053c778bea97720f7387de737bf15355db3cd5477b94f3571107bb
SSDEEP 48:S46+/TTKYKxbWsptIp5tCZ0iVEAWyMEv9v/ft2O2B8mkGofjLl:zxuPbO5tCZBVEAWyMEFv2CmqL
TLSH
T171C1A370B3D248B9D591413778AB33D36612AE746784500FDB6311AA3820AE7AD3EBC2
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

System.dll

Path C:\Users\Admin\AppData\Local\Temp\nsq149D.tmp\System.dll
Size 12KB
SHA256 8b4c47c4cf5e76ec57dd5a050d5acd832a0d532ee875d7b44f6cdaf68f90d37c
MD5 9b38a1b07a0ebc5c7e59e63346ecc2db
SHA1 97332a2ffcf12a3e3f27e7c05213b5d7faa13735
SHA512 26e77f8e10f6d8693c92bd036b53a3f6e0c523090ef8dfe479815f556ecd2b57fc90ce9f7cceebe70460d464decb27ad1fe240819fd56997764e96506b6a439c
SSDEEP 192:kjHcQ0qWTlt7wi5Aj/lM0sEWD/wtYbBjpNQybC7y+XZ40QPi:U/Qlt7wiij/lMRv/9V4b4r
TLSH
T1E8427C1297B089F2F151093419667F2A6FBEAC5D17F405A3CFE304C63D212CB9839243
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/752-49-0x00000000004E0000-0x0000000001734000-memory.dmp

Download

memory/1708-43-0x0000000004810000-0x0000000007AC4000-memory.dmp

Download

memory/1708-44-0x00000000746E5000-0x00000000746E6000-memory.dmp

Download

memory/1708-45-0x0000000004810000-0x0000000007AC4000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads