nymaim | 95c52fe0619fa35b7be05faaeb8e64d85ab9af4e57e9f2e2b76569c097724333

General

Target

file.exe
Size

1.2MB
MD5

1ec08d22c73ec54b3ffafceb09f9c835
SHA1

0b8ba1ee18240553ebb89cce68e7ae122e985a59
SHA256

95c52fe0619fa35b7be05faaeb8e64d85ab9af4e57e9f2e2b76569c097724333
SHA512

3b1bdc5a6c5031558f28e12348f4b3791954a4b980478b423bfdf5a9f418414cb41581a52e7222c5ad116ae25cf227559dda11468e520ad279bb4e833e98a994
SSDEEP

24576:pizmabQB9IUXNVP8DsIiYBlp/C2xNwxDO8ECmILxgZIY7eCLxYiQ:imabQHXTEDstYBz/C2xMD0lILeNeViQ

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-8K5T8.tmpPrintFolders.exe3DZGmqwACk.exe

pid process

4940 is-8K5T8.tmp
4816 PrintFolders.exe
3164 3DZGmqwACk.exe
Loads dropped DLL 1 IoCs

Processes:

is-8K5T8.tmp

pid process

4940 is-8K5T8.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
4940	is-8K5T8.tmp
4816	PrintFolders.exe
3164	3DZGmqwACk.exe

pid	process
4940	is-8K5T8.tmp

Drops file in Program Files directory 9 IoCs

Processes:

is-8K5T8.tmp

description	ioc	process
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-8K5T8.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-8K5T8.tmp
File created	C:\Program Files (x86)\PrintFolders\is-BT92V.tmp	is-8K5T8.tmp
File created	C:\Program Files (x86)\PrintFolders\is-QRI8R.tmp	is-8K5T8.tmp
File created	C:\Program Files (x86)\PrintFolders\is-1K23D.tmp	is-8K5T8.tmp
File created	C:\Program Files (x86)\PrintFolders\is-01AH3.tmp	is-8K5T8.tmp
File created	C:\Program Files (x86)\PrintFolders\is-LM3LT.tmp	is-8K5T8.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-8K5T8.tmp
File created	C:\Program Files (x86)\PrintFolders\is-3RJGU.tmp	is-8K5T8.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

4816 PrintFolders.exe
4816 PrintFolders.exe
4816 PrintFolders.exe
4816 PrintFolders.exe
4816 PrintFolders.exe
4816 PrintFolders.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

PrintFolders.exe

pid process

4816 PrintFolders.exe

pid	process
4816	PrintFolders.exe
4816	PrintFolders.exe
4816	PrintFolders.exe
4816	PrintFolders.exe
4816	PrintFolders.exe
4816	PrintFolders.exe

pid	process
4816	PrintFolders.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

file.exeis-8K5T8.tmpPrintFolders.exe

description	pid	process	target process
PID 4452 wrote to memory of 4940	4452	file.exe	is-8K5T8.tmp
PID 4452 wrote to memory of 4940	4452	file.exe	is-8K5T8.tmp
PID 4452 wrote to memory of 4940	4452	file.exe	is-8K5T8.tmp
PID 4940 wrote to memory of 4816	4940	is-8K5T8.tmp	PrintFolders.exe
PID 4940 wrote to memory of 4816	4940	is-8K5T8.tmp	PrintFolders.exe
PID 4940 wrote to memory of 4816	4940	is-8K5T8.tmp	PrintFolders.exe
PID 4816 wrote to memory of 3164	4816	PrintFolders.exe	3DZGmqwACk.exe
PID 4816 wrote to memory of 3164	4816	PrintFolders.exe	3DZGmqwACk.exe
PID 4816 wrote to memory of 3164	4816	PrintFolders.exe	3DZGmqwACk.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4452
- C:\Users\Admin\AppData\Local\Temp\is-FGDD4.tmp\is-8K5T8.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-FGDD4.tmp\is-8K5T8.tmp" /SL4 $8016E "C:\Users\Admin\AppData\Local\Temp\file.exe" 1057382 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4940
- - 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:4816
  - - C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\3DZGmqwACk.exe
      4⤵
      Executes dropped EXE
      PID:3164

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
1.4MB

MD5
82567477c83313954fb847ac4dfb41db

SHA1
0f0e5d52d220b7a4457255ec824a6743402d2cd4

SHA256
fa67ad225dff612d2fa729afd856ff256204dd8693140d667a4a369a9660e17e

SHA512
331f06765f84561e66f69111be156f2985b7a8d767e824c3381bf0e8d25f72f255f41f0a9ac9f0cf9c0ce511959695680b1c788c1c9e75074b79689952dde693

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

Filesize
1.4MB

MD5
82567477c83313954fb847ac4dfb41db

SHA1
0f0e5d52d220b7a4457255ec824a6743402d2cd4

SHA256
fa67ad225dff612d2fa729afd856ff256204dd8693140d667a4a369a9660e17e

SHA512
331f06765f84561e66f69111be156f2985b7a8d767e824c3381bf0e8d25f72f255f41f0a9ac9f0cf9c0ce511959695680b1c788c1c9e75074b79689952dde693

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-FGDD4.tmp\is-8K5T8.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-FGDD4.tmp\is-8K5T8.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-O05VA.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\3DZGmqwACk.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\3DZGmqwACk.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/3164-146-0x0000000000000000-mapping.dmp

Download
memory/4452-138-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/4452-132-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/4816-139-0x0000000000000000-mapping.dmp

Download
memory/4816-142-0x0000000000400000-0x0000000001372000-memory.dmp

Filesize
15.4MB

Download
memory/4816-143-0x0000000000400000-0x0000000001372000-memory.dmp

Filesize
15.4MB

Download
memory/4816-144-0x0000000000400000-0x0000000001372000-memory.dmp

Filesize
15.4MB

Download
memory/4816-145-0x0000000000400000-0x0000000001372000-memory.dmp

Filesize
15.4MB

Download
memory/4816-149-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4940-134-0x0000000000000000-mapping.dmp

Download

Analysis

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