nymaim | 7978af95a48c895c3c25a53d5f39b515d2f8cb2ebf3072f4902c4f82b2b7d3f7

Analysis

max time kernel
150s
max time network
173s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
22/11/2022, 08:32

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General

Target
file.exe
Size 1.4MB
Sample221122-ke97ksfe49
SHA256 7978af95a48c895c3c25a53d5f39b515d2f8cb2ebf3072f4902c4f82b2b7d3f7
MD5 7019bfcea0e2a7a236b77523be6b10be
SHA1 a859dfc63d2fce658f49f5687b5f9e692edbe8e1
SHA512 e074eae46543e652bd197f4c05c9fd904e66489f5f82978934a5858305754077b9fff490dc6d2ce08a7109a07d8fe6e5ea7799512b3fc806900974ee2f6acea2
SSDEEP 24576:Niz4f7TBAqOsT7NWHS0Mn2KK5tErZJUNjC96rETojPRQi0hU9SAgZIY7eCLxYiQ:m4XBAqOQ7Nnv2KoyrZJEjOCET7i0hU9d
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

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

pid	Process
2124	is-S1SPF.tmp
588	PrintFolders.exe
4776	0EuI96x.exe

Loads dropped DLL 1 IoCs

pid	Process
2124	is-S1SPF.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

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\is-N96TF.tmp	is-S1SPF.tmp
File created	C:\Program Files (x86)\PrintFolders\is-RS2D7.tmp	is-S1SPF.tmp
File created	C:\Program Files (x86)\PrintFolders\is-670G1.tmp	is-S1SPF.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-S1SPF.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-S1SPF.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-S1SPF.tmp
File created	C:\Program Files (x86)\PrintFolders\is-2KJNL.tmp	is-S1SPF.tmp
File created	C:\Program Files (x86)\PrintFolders\is-EUUD8.tmp	is-S1SPF.tmp
File created	C:\Program Files (x86)\PrintFolders\is-HPP3N.tmp	is-S1SPF.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

pid	Process
588	PrintFolders.exe
588	PrintFolders.exe
588	PrintFolders.exe
588	PrintFolders.exe
588	PrintFolders.exe
588	PrintFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
588	PrintFolders.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1308 wrote to memory of 2124	1308	file.exe	83
PID 1308 wrote to memory of 2124	1308	file.exe	83
PID 1308 wrote to memory of 2124	1308	file.exe	83
PID 2124 wrote to memory of 588	2124	is-S1SPF.tmp	84
PID 2124 wrote to memory of 588	2124	is-S1SPF.tmp	84
PID 2124 wrote to memory of 588	2124	is-S1SPF.tmp	84
PID 588 wrote to memory of 4776	588	PrintFolders.exe	85
PID 588 wrote to memory of 4776	588	PrintFolders.exe	85
PID 588 wrote to memory of 4776	588	PrintFolders.exe	85

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1308
- C:\Users\Admin\AppData\Local\Temp\is-8PFN5.tmp\is-S1SPF.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-8PFN5.tmp\is-S1SPF.tmp" /SL4 $301D0 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1252834 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:2124
- - 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:588
  - - C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\0EuI96x.exe
      4⤵
      Executes dropped EXE
      PID:4776

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.7MB
SHA256 bc16ef419b80d9e42527958f470201658acc6b406be0b2a1cdf64a9969a2f5ed
MD5 0e5d45f91fa2019846633f51ab01a163
SHA1 be90dfdfbb46bcd436d0e7ea5302a0a0807f20b4
SHA512 27e304f6b93ba3d49b12a7785bf88e1b9b68e5b2e22c092a365294695c090f02a6ab0510d565317f0951f20e2e94d7476f6c6cdbdb5b703b89ab1420049a2fbb
SSDEEP 24576:R+3HHhV+GI+bM4+x/l+WInu+f3y+P+xHcA3cvAGaNW3ibDP7QZc4K6hrUM:AXHhUWbwxMWm3fbWxHcA3vpsi/7QFK
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.7MB
SHA256 bc16ef419b80d9e42527958f470201658acc6b406be0b2a1cdf64a9969a2f5ed
MD5 0e5d45f91fa2019846633f51ab01a163
SHA1 be90dfdfbb46bcd436d0e7ea5302a0a0807f20b4
SHA512 27e304f6b93ba3d49b12a7785bf88e1b9b68e5b2e22c092a365294695c090f02a6ab0510d565317f0951f20e2e94d7476f6c6cdbdb5b703b89ab1420049a2fbb
SSDEEP 24576:R+3HHhV+GI+bM4+x/l+WInu+f3y+P+xHcA3cvAGaNW3ibDP7QZc4K6hrUM:AXHhUWbwxMWm3fbWxHcA3vpsi/7QFK
MD5 SHA1 SHA512 SSDEEP

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is-S1SPF.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-8PFN5.tmp\is-S1SPF.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

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is-S1SPF.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-8PFN5.tmp\is-S1SPF.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-NNUR6.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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0EuI96x.exe

Path C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\0EuI96x.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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0EuI96x.exe

Path C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\0EuI96x.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/588-142-0x0000000000400000-0x00000000013A8000-memory.dmp

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memory/588-143-0x0000000000400000-0x00000000013A8000-memory.dmp

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memory/588-147-0x0000000000400000-0x00000000013A8000-memory.dmp

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memory/1308-137-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/1308-132-0x0000000000400000-0x0000000000413000-memory.dmp

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