nymaim | 785d5d2fc4604c7a7e1a794141f13762d82f30fa104e572c639cd2ef65e7a775

General

Target

file.exe
Size

1.4MB
MD5

afe9ad1bd7aedb6f26bc0fa1d3e786f1
SHA1

4f2e9749a898a5db29819b10771624711763f140
SHA256

785d5d2fc4604c7a7e1a794141f13762d82f30fa104e572c639cd2ef65e7a775
SHA512

3426fc818e25f6b6d921d55a7881ee2dd3c82c984545d03490d73aa349dcaf98fca6e906736f4fd221ffd805b81239a77f6fc3af2d14410c571260e776e5e5e3
SSDEEP

24576:5iz9D05eG4hCSe3b/fFKrZ+qY9xHxr6Fo+lYnQ5/gwen7yjigZIY7eCLxYi4:y9DrG40Se3T82J++QSlq1NeVi4

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

C2

45.139.105.171

85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim
Executes dropped EXE 3 IoCs

Processes:

is-7B2QS.tmpPrintFolders.exe2yzvn4zb.exe

pid process

3196 is-7B2QS.tmp
3404 PrintFolders.exe
4264 2yzvn4zb.exe
Loads dropped DLL 1 IoCs

Processes:

is-7B2QS.tmp

pid process

3196 is-7B2QS.tmp
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

pid	process
3196	is-7B2QS.tmp
3404	PrintFolders.exe
4264	2yzvn4zb.exe

pid	process
3196	is-7B2QS.tmp

Drops file in Program Files directory 9 IoCs

Processes:

is-7B2QS.tmp

description	ioc	process
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-7B2QS.tmp
File created	C:\Program Files (x86)\PrintFolders\is-SUC6R.tmp	is-7B2QS.tmp
File created	C:\Program Files (x86)\PrintFolders\is-I2AER.tmp	is-7B2QS.tmp
File created	C:\Program Files (x86)\PrintFolders\is-AIVIJ.tmp	is-7B2QS.tmp
File created	C:\Program Files (x86)\PrintFolders\is-H7SD4.tmp	is-7B2QS.tmp
File created	C:\Program Files (x86)\PrintFolders\is-NCIR1.tmp	is-7B2QS.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-7B2QS.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-7B2QS.tmp
File created	C:\Program Files (x86)\PrintFolders\is-43OEU.tmp	is-7B2QS.tmp

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 6 IoCs

Processes:

PrintFolders.exe

pid process

3404 PrintFolders.exe
3404 PrintFolders.exe
3404 PrintFolders.exe
3404 PrintFolders.exe
3404 PrintFolders.exe
3404 PrintFolders.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

PrintFolders.exe

pid process

3404 PrintFolders.exe

pid	process
3404	PrintFolders.exe
3404	PrintFolders.exe
3404	PrintFolders.exe
3404	PrintFolders.exe
3404	PrintFolders.exe
3404	PrintFolders.exe

pid	process
3404	PrintFolders.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

file.exeis-7B2QS.tmpPrintFolders.exe

description	pid	process	target process
PID 4808 wrote to memory of 3196	4808	file.exe	is-7B2QS.tmp
PID 4808 wrote to memory of 3196	4808	file.exe	is-7B2QS.tmp
PID 4808 wrote to memory of 3196	4808	file.exe	is-7B2QS.tmp
PID 3196 wrote to memory of 3404	3196	is-7B2QS.tmp	PrintFolders.exe
PID 3196 wrote to memory of 3404	3196	is-7B2QS.tmp	PrintFolders.exe
PID 3196 wrote to memory of 3404	3196	is-7B2QS.tmp	PrintFolders.exe
PID 3404 wrote to memory of 4264	3404	PrintFolders.exe	2yzvn4zb.exe
PID 3404 wrote to memory of 4264	3404	PrintFolders.exe	2yzvn4zb.exe
PID 3404 wrote to memory of 4264	3404	PrintFolders.exe	2yzvn4zb.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4808

C:\Users\Admin\AppData\Local\Temp\is-UM8NE.tmp\is-7B2QS.tmp
"C:\Users\Admin\AppData\Local\Temp\is-UM8NE.tmp\is-7B2QS.tmp" /SL4 $70058 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1246197 51712
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:3196

C:\Program Files (x86)\PrintFolders\PrintFolders.exe
"C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3404

C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\2yzvn4zb.exe
4⤵
- Executes dropped EXE
PID:4264

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\PrintFolders\PrintFolders.exe

Filesize
1.6MB

MD5
69296fe71677078e25ccc3538f739f86

SHA1
3b9dd41eabdbf263d6b88a480fc89fcaf9e10382

SHA256
90e820fdd09cb615652b1e3199b5cf821e34e4d3ff4880f4b946285304b88697

SHA512
f18938e41c1e45a45d2d5e1d7542f2194b948ae3bcb839da5dcfb95f31422c5e8da63d8c5669895d81c23b899b7b365f7fc86722c38dced8070bc2a7fa9ae51b

Download Submit
C:\Program Files (x86)\PrintFolders\PrintFolders.exe

Filesize
1.6MB

MD5
69296fe71677078e25ccc3538f739f86

SHA1
3b9dd41eabdbf263d6b88a480fc89fcaf9e10382

SHA256
90e820fdd09cb615652b1e3199b5cf821e34e4d3ff4880f4b946285304b88697

SHA512
f18938e41c1e45a45d2d5e1d7542f2194b948ae3bcb839da5dcfb95f31422c5e8da63d8c5669895d81c23b899b7b365f7fc86722c38dced8070bc2a7fa9ae51b

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-NCDLM.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-UM8NE.tmp\is-7B2QS.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-UM8NE.tmp\is-7B2QS.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\2yzvn4zb.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\2yzvn4zb.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/3196-134-0x0000000000000000-mapping.dmp

Download
memory/3404-139-0x0000000000000000-mapping.dmp

Download
memory/3404-142-0x0000000000400000-0x00000000013A4000-memory.dmp

Filesize
15.6MB

Download
memory/3404-143-0x0000000000400000-0x00000000013A4000-memory.dmp

Filesize
15.6MB

Download
memory/3404-144-0x0000000000400000-0x00000000013A4000-memory.dmp

Filesize
15.6MB

Download
memory/3404-148-0x0000000000400000-0x00000000013A4000-memory.dmp

Filesize
15.6MB

Download
memory/3404-149-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4264-145-0x0000000000000000-mapping.dmp

Download
memory/4808-138-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/4808-132-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download

Analysis

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