gurcu | d71329c78c704ee9cc7133761b5e738a315e7eb784e348d7743a8a7366724e9f

Analysis

max time kernel
142s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20230831-en
resource tags

arch:x64arch:x86image:win10v2004-20230831-enlocale:en-usos:windows10-2004-x64system
submitted
14-09-2023 10:16

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General

Target

k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Size

339KB
MD5

1cab66a5c15f97f040fb23d354d04a9c
SHA1

f0dbebd22b2c7bfedbefa4435b345c58416f9448
SHA256

d71329c78c704ee9cc7133761b5e738a315e7eb784e348d7743a8a7366724e9f
SHA512

a5508a75a0a7c747cc50fe8284b9097e1cb9ae83bd7e80553ffa875a6d07d6eec7fc18f66a0a328aa0614c26642d884bfe152e6c09a11eeb0d64f6be66064eab
SSDEEP

3072:gdrpN/JlLKd5hkad0lk0vGJGMlngDBXrkhamyeFykt9sxc8eTRLUvenjLM/zNlgl:0UGPUvva+lxXY6uXAJMI9bAV0D

Score

10^/10

gurcu collection spyware stealer

Malware Config

Extracted

Family

gurcu

https://api.telegram.org/bot6193093056:AAHzyNGUGS9aUG6CCx6ENLoXpCFLzEQywIQ/sendMessage?chat_id=1098292643

Signatures

Gurcu, WhiteSnake
Gurcu is a malware stealer written in C#.
stealer gurcu

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2474409663-2236862430-1045297337-1000\Control Panel\International\Geo\Nation	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2474409663-2236862430-1045297337-1000\Control Panel\International\Geo\Nation	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe

Executes dropped EXE 2 IoCs

pid	Process
3620	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
2672	tor.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2474409663-2236862430-1045297337-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Key opened	\REGISTRY\USER\S-1-5-21-2474409663-2236862430-1045297337-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Key opened	\REGISTRY\USER\S-1-5-21-2474409663-2236862430-1045297337-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe

Looks up external IP address via web service 1 IoCs

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

flow	ioc
219	ip-api.com

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
3244	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4132	PING.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3620	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
3620	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2916	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Token: SeDebugPrivilege	3620	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3620	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2916 wrote to memory of 2292	2916	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	85
PID 2916 wrote to memory of 2292	2916	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	85
PID 2292 wrote to memory of 520	2292	cmd.exe	87
PID 2292 wrote to memory of 520	2292	cmd.exe	87
PID 2292 wrote to memory of 4132	2292	cmd.exe	88
PID 2292 wrote to memory of 4132	2292	cmd.exe	88
PID 2292 wrote to memory of 3244	2292	cmd.exe	92
PID 2292 wrote to memory of 3244	2292	cmd.exe	92
PID 2292 wrote to memory of 3620	2292	cmd.exe	94
PID 2292 wrote to memory of 3620	2292	cmd.exe	94
PID 3620 wrote to memory of 764	3620	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	98
PID 3620 wrote to memory of 764	3620	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	98
PID 3620 wrote to memory of 2672	3620	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	101
PID 3620 wrote to memory of 2672	3620	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	101

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2474409663-2236862430-1045297337-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2474409663-2236862430-1045297337-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe

C:\Users\Admin\AppData\Local\Temp\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
"C:\Users\Admin\AppData\Local\Temp\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2916
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "k2fef4820980d3c2c1f2cce2f95e94f5e1c18" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe" &&START "" "C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2292
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:520
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:4132
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "k2fef4820980d3c2c1f2cce2f95e94f5e1c18" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:3244
- - C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
    "C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Accesses Microsoft Outlook profiles
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    - outlook_office_path
    - outlook_win_path
    PID:3620
  - - C:\Windows\System32\tar.exe
      "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp81C3.tmp" -C "C:\Users\Admin\AppData\Local\lcybndk48g"
      4⤵
      PID:764
  - - C:\Users\Admin\AppData\Local\lcybndk48g\tor\tor.exe
      "C:\Users\Admin\AppData\Local\lcybndk48g\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\lcybndk48g\torrc.txt"
      4⤵
      Executes dropped EXE
      PID:2672

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe.log

Filesize
847B

MD5
3308a84a40841fab7dfec198b3c31af7

SHA1
4e7ab6336c0538be5dd7da529c0265b3b6523083

SHA256
169bc31a8d1666535977ca170d246a463e6531bb21faab6c48cb4269d9d60b2e

SHA512
97521d5fb94efdc836ea2723098a1f26a7589a76af51358eee17292d29c9325baf53ad6b4496c5ca3e208d1c9b9ad6797a370e2ae378072fc68f5d6e8b73b198

Download Submit
C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe

Filesize
339KB

MD5
1cab66a5c15f97f040fb23d354d04a9c

SHA1
f0dbebd22b2c7bfedbefa4435b345c58416f9448

SHA256
d71329c78c704ee9cc7133761b5e738a315e7eb784e348d7743a8a7366724e9f

SHA512
a5508a75a0a7c747cc50fe8284b9097e1cb9ae83bd7e80553ffa875a6d07d6eec7fc18f66a0a328aa0614c26642d884bfe152e6c09a11eeb0d64f6be66064eab

Download Submit
C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe

Filesize
339KB

MD5
1cab66a5c15f97f040fb23d354d04a9c

SHA1
f0dbebd22b2c7bfedbefa4435b345c58416f9448

SHA256
d71329c78c704ee9cc7133761b5e738a315e7eb784e348d7743a8a7366724e9f

SHA512
a5508a75a0a7c747cc50fe8284b9097e1cb9ae83bd7e80553ffa875a6d07d6eec7fc18f66a0a328aa0614c26642d884bfe152e6c09a11eeb0d64f6be66064eab

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp81C3.tmp

Filesize
13.3MB

MD5
89d2d5811c1aff539bb355f15f3ddad0

SHA1
5bb3577c25b6d323d927200c48cd184a3e27c873

SHA256
b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

SHA512
39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

Download Submit
C:\Users\Admin\AppData\Local\lcybndk48g\data\cached-microdesc-consensus.tmp

Filesize
2.7MB

MD5
8f4baf1bd0a79cd74deae40a54208173

SHA1
4a3d378b958e3e7ab633f46bb97232813ad5e0ed

SHA256
b28e8d51120a7148ed0656c141667c5f9eff38f17288795a10ccf09b3edbc809

SHA512
fa37e67a2c66df6bd3d29599da2052bac69c9d27111e8055827bbb115204c50486b040d9709f45ffa3e64c0d449f52a16a57938624ca7677e3cbac3c8e06be8a

Download Submit
C:\Users\Admin\AppData\Local\lcybndk48g\data\cached-microdescs.new

Filesize
8.8MB

MD5
eeee92bc9f92d67fdd5ce882e8849921

SHA1
e8b34b9c404dc4feb98c5fa980e2325aebd329c2

SHA256
18f4882d8c442aed7d4d4207ac428547b2ea66d2501adb113b970424a15c5f3f

SHA512
7a77a85dc7980a7e318c6d1b139ffe8d9967915e1f884e2eca2ab35e6f71d3db65985e387a9d002f06530733e93a9a5478f42768c377a14bb69fb50f5486987e

Download Submit
C:\Users\Admin\AppData\Local\lcybndk48g\data\cached-microdescs.new

Filesize
9.0MB

MD5
d70bd41c39d6663a8bf2677fb53771d9

SHA1
61b1d8c1e3a20abc632b7c64a7a4935fdf1ad8b0

SHA256
caffc45aef83455514e6f269dd001f3bcd12f9f3927179013052ac5fe0d7ac36

SHA512
1c87d52d281e651860b3243150b99308aeb9c697d46799d987b7f375b87f99d24977b6385563c12149461b8caa58d3f8b835bb2757ff832b04b782a2eb6b92df

Download Submit
C:\Users\Admin\AppData\Local\lcybndk48g\host\hostname

Filesize
64B

MD5
b38ba51282f51e8061804e1f4b735524

SHA1
43927d80700cb0857a2fb3d41ee1c8df8689203b

SHA256
350ad4e8baba0f1c50bca073b0c4deb96ead5b10933f7262c5f0541859bf596a

SHA512
067fb113af017e5c8261eb35a218d167056e5725df7a39cbdee7d6bda3288c85f250e6abee5dbafbfe8db98c066d97bf8a526ca88b06180993f2b074e646b7be

Download Submit
C:\Users\Admin\AppData\Local\lcybndk48g\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\lcybndk48g\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\lcybndk48g\torrc.txt

Filesize
218B

MD5
b72a01d286be9556b57abd14c7a3934a

SHA1
68bdf78639dc3ccb16dc54bdbd46cb82509a29b4

SHA256
a15584b9fedcd2ce686bbd76e663bb2a697d14c07aeb0c57b0f79b5709618812

SHA512
e2bcd8aa2fdd5b8ee130522a3fb69697fa756da808bf93e582dbd314e87b5b43ffb139f87050ad6953a3be08b2d80261fd45dcde4be1c63c593ba88b1654a05a

Download Submit
memory/2916-0-0x0000028A2A630000-0x0000028A2A68C000-memory.dmp

Filesize
368KB

Download
memory/2916-6-0x00007FFF70630000-0x00007FFF710F1000-memory.dmp

Filesize
10.8MB

Download
memory/2916-3-0x0000028A2C270000-0x0000028A2C280000-memory.dmp

Filesize
64KB

Download
memory/2916-1-0x00007FFF70630000-0x00007FFF710F1000-memory.dmp

Filesize
10.8MB

Download
memory/3620-12-0x00000211F11F0000-0x00000211F1200000-memory.dmp

Filesize
64KB

Download
memory/3620-11-0x00007FFF6F510000-0x00007FFF6FFD1000-memory.dmp

Filesize
10.8MB

Download
memory/3620-48-0x00007FFF6F510000-0x00007FFF6FFD1000-memory.dmp

Filesize
10.8MB

Download
memory/3620-53-0x00000211F11F0000-0x00000211F1200000-memory.dmp

Filesize
64KB

Download