djvu | cad0bd3e89c5f5068e476052ea238068c73584d0569ad13fa4ae10752f7d1245

General

Target

88bc85349ec9b3baf77191cc4a978305.exe
Size

734KB
MD5

88bc85349ec9b3baf77191cc4a978305
SHA1

8d83732a53b9ece6d485d0c7bc58c9b547fe2720
SHA256

cad0bd3e89c5f5068e476052ea238068c73584d0569ad13fa4ae10752f7d1245
SHA512

6ca5a61dec84ad1534fc623663b4004e68971539a0a74f257299d6c6bf3743426673870c8cb944f6ed370c57c328a9650728195307fe21e84aeb5327070d0715

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://acacaca.org/test1/get.php

Attributes

extension
.vvew
offline_id
rE5LpDv2ftYRXAo7bC18EpzfRMTHSGjgfyIMfZt1
payload_url
http://rgyui.top/dl/build2.exe
http://acacaca.org/files/1/build3.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 10 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4672-131-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4472-134-0x0000000004240000-0x000000000435B000-memory.dmp	family_djvu
behavioral2/memory/4672-132-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4672-135-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4672-136-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4672-140-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/980-143-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/980-145-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/980-150-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/980-162-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Downloads MZ/PE file
Executes dropped EXE 2 IoCs

Processes:

build2.exebuild2.exe

pid process

4952 build2.exe
4576 build2.exe

pid	process
4952	build2.exe
4576	build2.exe

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

Processes:

88bc85349ec9b3baf77191cc4a978305.exe88bc85349ec9b3baf77191cc4a978305.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Control Panel\International\Geo\Nation	88bc85349ec9b3baf77191cc4a978305.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Control Panel\International\Geo\Nation	88bc85349ec9b3baf77191cc4a978305.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File Permissions Modification
T1222

Processes:

icacls.exe

pid process

4496 icacls.exe

pid	process
4496	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

88bc85349ec9b3baf77191cc4a978305.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\9bd491fa-d1f2-427e-8f89-a87ac062f82b\\88bc85349ec9b3baf77191cc4a978305.exe\" --AutoStart"	88bc85349ec9b3baf77191cc4a978305.exe

Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

12 api.2ip.ua
13 api.2ip.ua
21 api.2ip.ua

flow	ioc
12	api.2ip.ua
13	api.2ip.ua
21	api.2ip.ua

Suspicious use of SetThreadContext 3 IoCs

Processes:

88bc85349ec9b3baf77191cc4a978305.exe88bc85349ec9b3baf77191cc4a978305.exebuild2.exe

description	pid	process	target process
PID 4472 set thread context of 4672	4472	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 3940 set thread context of 980	3940	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 4952 set thread context of 4576	4952	build2.exe	build2.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: EnumeratesProcesses 4 IoCs

Processes:

88bc85349ec9b3baf77191cc4a978305.exe88bc85349ec9b3baf77191cc4a978305.exe

pid	process
4672	88bc85349ec9b3baf77191cc4a978305.exe
4672	88bc85349ec9b3baf77191cc4a978305.exe
980	88bc85349ec9b3baf77191cc4a978305.exe
980	88bc85349ec9b3baf77191cc4a978305.exe

Suspicious use of WriteProcessMemory 37 IoCs

Processes:

88bc85349ec9b3baf77191cc4a978305.exe88bc85349ec9b3baf77191cc4a978305.exe88bc85349ec9b3baf77191cc4a978305.exe88bc85349ec9b3baf77191cc4a978305.exebuild2.exe

C:\Users\Admin\AppData\Local\Temp\88bc85349ec9b3baf77191cc4a978305.exe
"C:\Users\Admin\AppData\Local\Temp\88bc85349ec9b3baf77191cc4a978305.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4472

C:\Users\Admin\AppData\Local\Temp\88bc85349ec9b3baf77191cc4a978305.exe
"C:\Users\Admin\AppData\Local\Temp\88bc85349ec9b3baf77191cc4a978305.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4672

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\9bd491fa-d1f2-427e-8f89-a87ac062f82b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:4496

C:\Users\Admin\AppData\Local\Temp\88bc85349ec9b3baf77191cc4a978305.exe
"C:\Users\Admin\AppData\Local\Temp\88bc85349ec9b3baf77191cc4a978305.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3940

C:\Users\Admin\AppData\Local\Temp\88bc85349ec9b3baf77191cc4a978305.exe
"C:\Users\Admin\AppData\Local\Temp\88bc85349ec9b3baf77191cc4a978305.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:980

C:\Users\Admin\AppData\Local\39ff4693-54a6-4abb-a17d-d0311661deaa\build2.exe
"C:\Users\Admin\AppData\Local\39ff4693-54a6-4abb-a17d-d0311661deaa\build2.exe"
5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4952

C:\Users\Admin\AppData\Local\39ff4693-54a6-4abb-a17d-d0311661deaa\build2.exe
"C:\Users\Admin\AppData\Local\39ff4693-54a6-4abb-a17d-d0311661deaa\build2.exe"
6⤵
- Executes dropped EXE
PID:4576

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

File Permissions Modification

1

T1222

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize
2KB

MD5
eba45bc75daf7421d4767f04582068ca

SHA1
e2d2b46d3780a8b7cdde6e542430f0da28684ce8

SHA256
87f79123a6048371f5e4eccca848509ff8315dea4be740c8480fe945c02b4f38

SHA512
0c081c029224806b1f1f200da673a9554e5d40756736f9ca8bc073c25703092c6d1e72a2fd971b41bedeba26e6ca9fa85486df39f852505925a49d8b94e0e330

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize
1KB

MD5
4f74b1c3f52834fb5d5d0946410f286a

SHA1
e8b1734733535d236f422c282271e97b784b5261

SHA256
56b6f9f565e620e3cc377ac2265180c96efff2844f11cbb229eef977327869f1

SHA512
b84101ebe8570b2f0ecbefafcf58b941100ac6efc9cbbfc711e57bedf6cb6fc62141bd2d66c34f4b316568948ff6448c96ddef2cfde625965a9ea5968beefb2c

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize
488B

MD5
da987cd16cb33c5f0757086cb642e89f

SHA1
868386b6f68895b98800ed5898380907be090815

SHA256
c83d8ef5e03d289ce2aebd717bc62606b958d454e4052932389a5178655abb37

SHA512
6a79fdb5b795fcbba221fcddd655fec450fc38a20d36b2c93e1228d6b3a1fe0a36c0b1f0b9b2d3160b5fa75c997d4cbb266302c2616bcc6dbd28fedf1d657e17

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize
396B

MD5
e0dbd95c241053dd9ac17fff471db357

SHA1
4e4140d373e2b7b3550ac049df0ede6c98a87ee2

SHA256
19003f0d4cfbc48313c48d12d0b5eb794958f4d3b7b20489ddbd4cc8266d819a

SHA512
3c64de7ae4d19ecfafd0ff15a7c9e70408cfdf985475bb347c59a85469697a2b69d3e95f12a20a0e7a038a044c386d74c95bcb3f62cccffa39de918da6de3188

Download Submit
C:\Users\Admin\AppData\Local\39ff4693-54a6-4abb-a17d-d0311661deaa\build2.exe
Filesize
438KB

MD5
2f3d0323ba962334ef87ed098ad02289

SHA1
5b4c70e331af83eaf384f45a01e322b094353375

SHA256
12a51367c5c85ff3c1dc73743cface2e01accecf2879a36adbddf566d52987b3

SHA512
1e33ace1068f614bfac35aa67733c2806328b586be273a611409df87be03c5edc9e312ab213004c8fab71453ef5e34e474d9273c4a97d95d135c18f440674ad3

Download Submit
C:\Users\Admin\AppData\Local\39ff4693-54a6-4abb-a17d-d0311661deaa\build2.exe
Filesize
438KB

MD5
2f3d0323ba962334ef87ed098ad02289

SHA1
5b4c70e331af83eaf384f45a01e322b094353375

SHA256
12a51367c5c85ff3c1dc73743cface2e01accecf2879a36adbddf566d52987b3

SHA512
1e33ace1068f614bfac35aa67733c2806328b586be273a611409df87be03c5edc9e312ab213004c8fab71453ef5e34e474d9273c4a97d95d135c18f440674ad3

Download Submit
C:\Users\Admin\AppData\Local\39ff4693-54a6-4abb-a17d-d0311661deaa\build2.exe
Filesize
438KB

MD5
2f3d0323ba962334ef87ed098ad02289

SHA1
5b4c70e331af83eaf384f45a01e322b094353375

SHA256
12a51367c5c85ff3c1dc73743cface2e01accecf2879a36adbddf566d52987b3

SHA512
1e33ace1068f614bfac35aa67733c2806328b586be273a611409df87be03c5edc9e312ab213004c8fab71453ef5e34e474d9273c4a97d95d135c18f440674ad3

Download Submit
C:\Users\Admin\AppData\Local\9bd491fa-d1f2-427e-8f89-a87ac062f82b\88bc85349ec9b3baf77191cc4a978305.exe
Filesize
734KB

MD5
88bc85349ec9b3baf77191cc4a978305

SHA1
8d83732a53b9ece6d485d0c7bc58c9b547fe2720

SHA256
cad0bd3e89c5f5068e476052ea238068c73584d0569ad13fa4ae10752f7d1245

SHA512
6ca5a61dec84ad1534fc623663b4004e68971539a0a74f257299d6c6bf3743426673870c8cb944f6ed370c57c328a9650728195307fe21e84aeb5327070d0715

Download Submit
memory/980-150-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/980-162-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/980-141-0x0000000000000000-mapping.dmp

Download
memory/980-143-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/980-145-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3940-139-0x0000000000000000-mapping.dmp

Download
memory/3940-144-0x0000000004248000-0x00000000042D9000-memory.dmp

Filesize
580KB

Download
memory/4472-133-0x0000000004167000-0x00000000041F8000-memory.dmp

Filesize
580KB

Download
memory/4472-134-0x0000000004240000-0x000000000435B000-memory.dmp

Filesize
1.1MB

Download
memory/4496-137-0x0000000000000000-mapping.dmp

Download
memory/4576-154-0x0000000000000000-mapping.dmp

Download
memory/4576-155-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/4576-157-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/4576-160-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/4576-161-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/4672-132-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4672-130-0x0000000000000000-mapping.dmp

Download
memory/4672-135-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4672-136-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4672-131-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4672-140-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4952-151-0x0000000000000000-mapping.dmp

Download
memory/4952-158-0x00000000006DD000-0x0000000000706000-memory.dmp

Filesize
164KB

Download
memory/4952-159-0x00000000020A0000-0x00000000020E6000-memory.dmp

Filesize
280KB

Download
memory/4952-163-0x00000000020A0000-0x00000000020E6000-memory.dmp

Filesize
280KB

Download

description	pid	process	target process
PID 4472 wrote to memory of 4672	4472	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 4472 wrote to memory of 4672	4472	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 4472 wrote to memory of 4672	4472	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 4472 wrote to memory of 4672	4472	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 4472 wrote to memory of 4672	4472	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 4472 wrote to memory of 4672	4472	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 4472 wrote to memory of 4672	4472	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 4472 wrote to memory of 4672	4472	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 4472 wrote to memory of 4672	4472	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 4472 wrote to memory of 4672	4472	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 4672 wrote to memory of 4496	4672	88bc85349ec9b3baf77191cc4a978305.exe	icacls.exe
PID 4672 wrote to memory of 4496	4672	88bc85349ec9b3baf77191cc4a978305.exe	icacls.exe
PID 4672 wrote to memory of 4496	4672	88bc85349ec9b3baf77191cc4a978305.exe	icacls.exe
PID 4672 wrote to memory of 3940	4672	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 4672 wrote to memory of 3940	4672	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 4672 wrote to memory of 3940	4672	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 3940 wrote to memory of 980	3940	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 3940 wrote to memory of 980	3940	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 3940 wrote to memory of 980	3940	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 3940 wrote to memory of 980	3940	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 3940 wrote to memory of 980	3940	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 3940 wrote to memory of 980	3940	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 3940 wrote to memory of 980	3940	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 3940 wrote to memory of 980	3940	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 3940 wrote to memory of 980	3940	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 3940 wrote to memory of 980	3940	88bc85349ec9b3baf77191cc4a978305.exe	88bc85349ec9b3baf77191cc4a978305.exe
PID 980 wrote to memory of 4952	980	88bc85349ec9b3baf77191cc4a978305.exe	build2.exe
PID 980 wrote to memory of 4952	980	88bc85349ec9b3baf77191cc4a978305.exe	build2.exe
PID 980 wrote to memory of 4952	980	88bc85349ec9b3baf77191cc4a978305.exe	build2.exe
PID 4952 wrote to memory of 4576	4952	build2.exe	build2.exe
PID 4952 wrote to memory of 4576	4952	build2.exe	build2.exe
PID 4952 wrote to memory of 4576	4952	build2.exe	build2.exe
PID 4952 wrote to memory of 4576	4952	build2.exe	build2.exe
PID 4952 wrote to memory of 4576	4952	build2.exe	build2.exe
PID 4952 wrote to memory of 4576	4952	build2.exe	build2.exe
PID 4952 wrote to memory of 4576	4952	build2.exe	build2.exe
PID 4952 wrote to memory of 4576	4952	build2.exe	build2.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads