agenttesla | d209b6fe66d2f2c856a3f56d6386a1963381a681c2cde6367840a24d717427e5

Analysis

max time kernel
144s
max time network
143s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
21-03-2023 13:02

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General

Target

rBrancheforeningers123.exe
Size

377KB
MD5

f63809d17e11d6e0d719d44a2ef45ca0
SHA1

58a52ad6005886660cf54c7abbc21b7b31371894
SHA256

d209b6fe66d2f2c856a3f56d6386a1963381a681c2cde6367840a24d717427e5
SHA512

c18204e5fb2e13665e76f42c105cbaeffbfe10d54e59ec90a3c416d76f192d54b80a05d35d973f3afa15f4c43f1b7d82587f0134d992630548caf70d5328cc1b
SSDEEP

6144:sspNjlsvCnvxZGVGGMrYfXcHQJsOjGXve0i489/8zvZKcrAc2uxMK7S+2vhv+k12:scBwJsON+zHrAzfK4hGko9HJSU

Score

10^/10

agenttesla guloader collection discovery downloader keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.copychamo.com
Port:
587
Username:
[email protected]
Password:
Iu!&}hG}8u#3
Email To:
[email protected]

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Checks QEMU agent file 2 TTPs 2 IoCs

Checks presence of QEMU agent, possibly to detect virtualization.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	rBrancheforeningers123.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	caspol.exe

Loads dropped DLL 1 IoCs

pid	Process
1236	rBrancheforeningers123.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	caspol.exe
Key opened	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	caspol.exe
Key opened	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	caspol.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
11	api.ipify.org
10	api.ipify.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1108	caspol.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1236	rBrancheforeningers123.exe
1108	caspol.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1236 set thread context of 1108	1236	rBrancheforeningers123.exe	26

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Fonts\Komponenternes\Trigesimal\Nonbibulously.Rsr	rBrancheforeningers123.exe

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

System Information Discovery
T1082

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1236	rBrancheforeningers123.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1108	caspol.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1236 wrote to memory of 1108	1236	rBrancheforeningers123.exe	26
PID 1236 wrote to memory of 1108	1236	rBrancheforeningers123.exe	26
PID 1236 wrote to memory of 1108	1236	rBrancheforeningers123.exe	26
PID 1236 wrote to memory of 1108	1236	rBrancheforeningers123.exe	26
PID 1236 wrote to memory of 1108	1236	rBrancheforeningers123.exe	26

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	caspol.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	caspol.exe

C:\Users\Admin\AppData\Local\Temp\rBrancheforeningers123.exe
"C:\Users\Admin\AppData\Local\Temp\rBrancheforeningers123.exe"
1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1236
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
  "C:\Users\Admin\AppData\Local\Temp\rBrancheforeningers123.exe"
  2⤵
  - Checks QEMU agent file
  - Accesses Microsoft Outlook profiles
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:1108

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

T1102

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab88C2.tmp

Filesize
61KB

MD5
fc4666cbca561e864e7fdf883a9e6661

SHA1
2f8d6094c7a34bf12ea0bbf0d51ee9c5bb7939a5

SHA256
10f3deb6c452d749a7451b5d065f4c0449737e5ee8a44f4d15844b503141e65b

SHA512
c71f54b571e01f247f072be4bbebdf5d8410b67eb79a61e7e0d9853fe857ab9bd12f53e6af3394b935560178107291fc4be351b27deb388eba90ba949633d57d

Download Submit
\Users\Admin\AppData\Local\Temp\nsj6DE2.tmp\System.dll

Filesize
11KB

MD5
17ed1c86bd67e78ade4712be48a7d2bd

SHA1
1cc9fe86d6d6030b4dae45ecddce5907991c01a0

SHA256
bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb

SHA512
0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

Download Submit
memory/1108-65-0x00000000012F0000-0x000000000358D000-memory.dmp

Filesize
34.6MB

Download
memory/1108-66-0x00000000012F0000-0x000000000358D000-memory.dmp

Filesize
34.6MB

Download
memory/1108-67-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/1108-89-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/1108-90-0x00000000012F0000-0x000000000358D000-memory.dmp

Filesize
34.6MB

Download
memory/1108-91-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1108-93-0x00000000339D0000-0x0000000033A10000-memory.dmp

Filesize
256KB

Download
memory/1108-114-0x00000000339D0000-0x0000000033A10000-memory.dmp

Filesize
256KB

Download
memory/1236-63-0x0000000002690000-0x000000000492D000-memory.dmp

Filesize
34.6MB

Download
memory/1236-64-0x0000000002690000-0x000000000492D000-memory.dmp

Filesize
34.6MB

Download