gurcu | c2e57e9b6e52a5429ae7a7bd36c57f63589d78fbf0ffe5760ada4a67b9fadec9

Resubmissions

10/04/2024, 02:28

240410-cyaxtsca43 10

10/04/2024, 02:28

10/04/2024, 02:28

10/04/2024, 02:28

14/10/2023, 01:16

Analysis

max time kernel
300s
max time network
297s
platform
windows11-21h2_x64
resource
win11-20240221-en
resource tags

arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
submitted
10/04/2024, 02:28

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General

Target

m1f1f3a069223072f8d6802a079235d.exe
Size

306KB
MD5

4b36dcaa94c3eca48a6292bd670ffe79
SHA1

705484e61ac39ba02cc80903be0da6ce74333334
SHA256

c2e57e9b6e52a5429ae7a7bd36c57f63589d78fbf0ffe5760ada4a67b9fadec9
SHA512

cf07d7f80264554eb3b945421ca41db38ff79707775d355d478c09f4b64d14f523339295aa4bc9b79c0dbb004e6756585bcf85edc8cbc2d16f7f0481be93513a
SSDEEP

3072:71E/yXS0m2pOVLVewP2D/kIyC+mvXi1QJIkjXAToknBq9tT/8RJ6W3t3dpdQGqKI:7E2mDMtqa5EOTeKXAllKD9bmTneefA

Score

10^/10

gurcu collection spyware stealer

Malware Config

Extracted

Family

gurcu

https://api.telegram.org/bot6209822134:AAHQxD-CI1YDVcNbXijXHlonsEUgv3dfYtg/sendMessage?chat_id=-1001529292045

Signatures

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

Executes dropped EXE 12 IoCs

pid	Process
1788	m1f1f3a069223072f8d6802a079235d.exe
2112	tor.exe
2264	m1f1f3a069223072f8d6802a079235d.exe
2236	tor.exe
716	m1f1f3a069223072f8d6802a079235d.exe
4460	tor.exe
1464	m1f1f3a069223072f8d6802a079235d.exe
2248	tor.exe
2052	m1f1f3a069223072f8d6802a079235d.exe
5080	tor.exe
3064	m1f1f3a069223072f8d6802a079235d.exe
2440	tor.exe

Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
spyware stealer

Data from Local System
T1005

Credentials in Registry
T1552.002
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-1-5-21-2930051783-2551506282-3430162621-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	m1f1f3a069223072f8d6802a079235d.exe
Key opened	\REGISTRY\USER\S-1-5-21-2930051783-2551506282-3430162621-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	m1f1f3a069223072f8d6802a079235d.exe
Key opened	\REGISTRY\USER\S-1-5-21-2930051783-2551506282-3430162621-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	m1f1f3a069223072f8d6802a079235d.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
25	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
3928	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4076	PING.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1788	m1f1f3a069223072f8d6802a079235d.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	3744	m1f1f3a069223072f8d6802a079235d.exe
Token: SeDebugPrivilege	1788	m1f1f3a069223072f8d6802a079235d.exe
Token: SeDebugPrivilege	2264	m1f1f3a069223072f8d6802a079235d.exe
Token: SeDebugPrivilege	716	m1f1f3a069223072f8d6802a079235d.exe
Token: SeDebugPrivilege	1464	m1f1f3a069223072f8d6802a079235d.exe
Token: SeDebugPrivilege	2052	m1f1f3a069223072f8d6802a079235d.exe
Token: SeDebugPrivilege	3064	m1f1f3a069223072f8d6802a079235d.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 3744 wrote to memory of 2884	3744	m1f1f3a069223072f8d6802a079235d.exe	78
PID 3744 wrote to memory of 2884	3744	m1f1f3a069223072f8d6802a079235d.exe	78
PID 2884 wrote to memory of 4552	2884	cmd.exe	80
PID 2884 wrote to memory of 4552	2884	cmd.exe	80
PID 2884 wrote to memory of 4076	2884	cmd.exe	81
PID 2884 wrote to memory of 4076	2884	cmd.exe	81
PID 2884 wrote to memory of 3928	2884	cmd.exe	82
PID 2884 wrote to memory of 3928	2884	cmd.exe	82
PID 2884 wrote to memory of 1788	2884	cmd.exe	83
PID 2884 wrote to memory of 1788	2884	cmd.exe	83
PID 1788 wrote to memory of 3492	1788	m1f1f3a069223072f8d6802a079235d.exe	85
PID 1788 wrote to memory of 3492	1788	m1f1f3a069223072f8d6802a079235d.exe	85
PID 1788 wrote to memory of 2112	1788	m1f1f3a069223072f8d6802a079235d.exe	87
PID 1788 wrote to memory of 2112	1788	m1f1f3a069223072f8d6802a079235d.exe	87
PID 2264 wrote to memory of 2236	2264	m1f1f3a069223072f8d6802a079235d.exe	90
PID 2264 wrote to memory of 2236	2264	m1f1f3a069223072f8d6802a079235d.exe	90
PID 716 wrote to memory of 4460	716	m1f1f3a069223072f8d6802a079235d.exe	96
PID 716 wrote to memory of 4460	716	m1f1f3a069223072f8d6802a079235d.exe	96
PID 1464 wrote to memory of 2248	1464	m1f1f3a069223072f8d6802a079235d.exe	101
PID 1464 wrote to memory of 2248	1464	m1f1f3a069223072f8d6802a079235d.exe	101
PID 2052 wrote to memory of 5080	2052	m1f1f3a069223072f8d6802a079235d.exe	106
PID 2052 wrote to memory of 5080	2052	m1f1f3a069223072f8d6802a079235d.exe	106
PID 3064 wrote to memory of 2440	3064	m1f1f3a069223072f8d6802a079235d.exe	111
PID 3064 wrote to memory of 2440	3064	m1f1f3a069223072f8d6802a079235d.exe	111

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-1-5-21-2930051783-2551506282-3430162621-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	m1f1f3a069223072f8d6802a079235d.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2930051783-2551506282-3430162621-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	m1f1f3a069223072f8d6802a079235d.exe

C:\Users\Admin\AppData\Local\Temp\m1f1f3a069223072f8d6802a079235d.exe
"C:\Users\Admin\AppData\Local\Temp\m1f1f3a069223072f8d6802a079235d.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3744
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "m1f1f3a069223072f8d6802a079235d" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\m1f1f3a069223072f8d6802a079235d.exe" &&START "" "C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2884
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:4552
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:4076
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "m1f1f3a069223072f8d6802a079235d" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:3928
- - C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe
    "C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe"
    3⤵
    - Executes dropped EXE
    - Accesses Microsoft Outlook profiles
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    - outlook_office_path
    - outlook_win_path
    PID:1788
  - - C:\Windows\System32\tar.exe
      "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp4B51.tmp" -C "C:\Users\Admin\AppData\Local\d67800nkmj"
      4⤵
      PID:3492
  - - C:\Users\Admin\AppData\Local\d67800nkmj\tor\tor.exe
      "C:\Users\Admin\AppData\Local\d67800nkmj\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\d67800nkmj\torrc.txt"
      4⤵
      Executes dropped EXE
      PID:2112

C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe
C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2264
- C:\Users\Admin\AppData\Local\d67800nkmj\tor\tor.exe
  "C:\Users\Admin\AppData\Local\d67800nkmj\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\d67800nkmj\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:2236

C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe
C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:716
- C:\Users\Admin\AppData\Local\d67800nkmj\tor\tor.exe
  "C:\Users\Admin\AppData\Local\d67800nkmj\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\d67800nkmj\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:4460

C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe
C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1464
- C:\Users\Admin\AppData\Local\d67800nkmj\tor\tor.exe
  "C:\Users\Admin\AppData\Local\d67800nkmj\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\d67800nkmj\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:2248

C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe
C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2052
- C:\Users\Admin\AppData\Local\d67800nkmj\tor\tor.exe
  "C:\Users\Admin\AppData\Local\d67800nkmj\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\d67800nkmj\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:5080

C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe
C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3064
- C:\Users\Admin\AppData\Local\d67800nkmj\tor\tor.exe
  "C:\Users\Admin\AppData\Local\d67800nkmj\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\d67800nkmj\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:2440

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

Credentials in Registry

T1552.002

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\m1f1f3a069223072f8d6802a079235d.exe.log

Filesize
847B

MD5
486ebddc86ea8b3e965d390d22283a23

SHA1
eaffc047f067084867e8575c576a9ec60e094ba8

SHA256
50a57273ecb794e53b0622eb841341e2643c11f53fa47356e6e754ab2268171d

SHA512
0a50ba02250b38355a6f4fb94e40c61258a74031d9aea7cdf675f3e068f39ec0748ecf292aaf2f94b1963b9d66516ee79aa6c552617048e248774af0ff07189d

Download Submit
C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe

Filesize
306KB

MD5
4b36dcaa94c3eca48a6292bd670ffe79

SHA1
705484e61ac39ba02cc80903be0da6ce74333334

SHA256
c2e57e9b6e52a5429ae7a7bd36c57f63589d78fbf0ffe5760ada4a67b9fadec9

SHA512
cf07d7f80264554eb3b945421ca41db38ff79707775d355d478c09f4b64d14f523339295aa4bc9b79c0dbb004e6756585bcf85edc8cbc2d16f7f0481be93513a

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp4B51.tmp

Filesize
13.3MB

MD5
89d2d5811c1aff539bb355f15f3ddad0

SHA1
5bb3577c25b6d323d927200c48cd184a3e27c873

SHA256
b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

SHA512
39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

Download Submit
C:\Users\Admin\AppData\Local\d67800nkmj\data\cached-certs

Filesize
18KB

MD5
d2839357ac44b5e33a8baf2ec1b1206d

SHA1
fbb7604070d4cb00afa752fa062d779e0a800d87

SHA256
a311de4292b72032cfce7437a982a606bd3a2f5ae88289297e3c9ea7654fa1d9

SHA512
ec22bd5c5cf754642f7077e4494a5350c51b636d11a60fd751f0a03870ac54369a278b1ff6a228d9c23162b0675e472217663adec2f339fef32549a917e7bda4

Download Submit
C:\Users\Admin\AppData\Local\d67800nkmj\data\cached-microdesc-consensus

Filesize
2.7MB

MD5
a0db8a87f7b723266c8b04255da46b06

SHA1
4df00ea56d22d88f3d2e005ef66bad5b3ef92ebf

SHA256
60b43cdce0f807f7891521f396f53def34a7d98986dbde0faa2a197189c587f3

SHA512
41b8fc467d11af7ca6a42c7e94d1b8295ab3ae5d6d186b4f378e6e079440520e8324b695da1134beb2bc1697d2491edcc70c1b75ab6fc66b9c1cb2ecbcdb4a7d

Download Submit
C:\Users\Admin\AppData\Local\d67800nkmj\data\cached-microdescs.new

Filesize
20.4MB

MD5
3e2fc4aaafff8d2c4a68be0f58a182d3

SHA1
41f75582a88aef8708391627726d12ac52a03661

SHA256
f55328a6cc142071ea40aed0abe5128e60f3c641115f3c67465fe8d5bf85511b

SHA512
e2308c92406e1ff93a04089db5d4fc0f7ffd6bac3865382a407f575c8217dcdcb05970122fdcf34487ee4c4080e594789aa5bbdf4126c6784367ec0edffb00d9

Download Submit
C:\Users\Admin\AppData\Local\d67800nkmj\host\hostname

Filesize
64B

MD5
02a4326c76f11d38cdde7618b9e3a680

SHA1
6a8e1a174541b85eb4c267de7c349c817c7ec601

SHA256
ee8da1bd9c8ef2be09f5fccd32bbb41aafffefd2a0c17373e6a3e2c102d3540b

SHA512
3fee7620c3b3bfc66aaa83af1b7f08acc2dd52dcb324c6b09dfc2cb81884b984360a7701cae88fc3121f9090122a246c91e02150afbef1ad21b7bb6fb12bcb5b

Download Submit
C:\Users\Admin\AppData\Local\d67800nkmj\port.dat

Filesize
4B

MD5
91576cbf171986154e523305a69c79d3

SHA1
8c11f8b0a73702036847a5a2a137fc30475f39b9

SHA256
68c599738e42780938995a41ebe1cc8f054726a7325e7bb417bf37772df2150a

SHA512
9e7866d098077c023d44123c8ff520f6290b96c75df77c33291a6c1c08a9635d0d556e08176a2ae6e3006dd3b96cc417afdb67b9d20192323ac87abc28ca8612

Download Submit
C:\Users\Admin\AppData\Local\d67800nkmj\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\d67800nkmj\torrc.txt

Filesize
218B

MD5
e6ff1dc7bcbcc31685e0f30e5f333952

SHA1
363a8b8eaaa10a5f8a5ff1cd4751b82305a83911

SHA256
69fca746e04b7427c344870a5007350d84d36e3e2fc2458ebb3608fbbe49dc5f

SHA512
4a443824355ccd6d134d103cb2e396ffc1499d73ab34b6863484458e8c66fc02995f6e2c004f1a7b49d167d15cbb1def93da9dd67c953a773dfd34e7a5e55be5

Download Submit
memory/716-92-0x00007FFEE08A0000-0x00007FFEE1362000-memory.dmp

Filesize
10.8MB

Download
memory/716-90-0x000001FE71510000-0x000001FE71520000-memory.dmp

Filesize
64KB

Download
memory/716-89-0x00007FFEE08A0000-0x00007FFEE1362000-memory.dmp

Filesize
10.8MB

Download
memory/1464-98-0x00007FFEE08A0000-0x00007FFEE1362000-memory.dmp

Filesize
10.8MB

Download
memory/1464-100-0x00007FFEE08A0000-0x00007FFEE1362000-memory.dmp

Filesize
10.8MB

Download
memory/1788-12-0x0000022CAFBE0000-0x0000022CAFBF0000-memory.dmp

Filesize
64KB

Download
memory/1788-11-0x00007FFEE08A0000-0x00007FFEE1362000-memory.dmp

Filesize
10.8MB

Download
memory/1788-83-0x0000022CAFBE0000-0x0000022CAFBF0000-memory.dmp

Filesize
64KB

Download
memory/1788-78-0x00007FFEE08A0000-0x00007FFEE1362000-memory.dmp

Filesize
10.8MB

Download
memory/2052-106-0x00007FFEE08A0000-0x00007FFEE1362000-memory.dmp

Filesize
10.8MB

Download
memory/2052-108-0x00007FFEE08A0000-0x00007FFEE1362000-memory.dmp

Filesize
10.8MB

Download
memory/2264-67-0x00007FFEE08A0000-0x00007FFEE1362000-memory.dmp

Filesize
10.8MB

Download
memory/2264-53-0x00007FFEE08A0000-0x00007FFEE1362000-memory.dmp

Filesize
10.8MB

Download
memory/2264-54-0x000002376A3D0000-0x000002376A3E0000-memory.dmp

Filesize
64KB

Download
memory/3064-118-0x00007FFEE08A0000-0x00007FFEE1362000-memory.dmp

Filesize
10.8MB

Download
memory/3064-120-0x00007FFEE08A0000-0x00007FFEE1362000-memory.dmp

Filesize
10.8MB

Download
memory/3744-0-0x000001836FFA0000-0x000001836FFF2000-memory.dmp

Filesize
328KB

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memory/3744-6-0x00007FFEE08A0000-0x00007FFEE1362000-memory.dmp

Filesize
10.8MB

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memory/3744-2-0x00000183724D0000-0x00000183724E0000-memory.dmp

Filesize
64KB

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memory/3744-1-0x00007FFEE08A0000-0x00007FFEE1362000-memory.dmp

Filesize
10.8MB

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