nymaim | c832f488cc1f5fe677752baf32754631117d57213c5ad296da678a82aa05613b

Analysis

max time kernel
195s
max time network
206s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
26/11/2022, 04:47

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General

Target
file.exe
Size 2.1MB
Sample221126-fejbmsga8x
SHA256 c832f488cc1f5fe677752baf32754631117d57213c5ad296da678a82aa05613b
MD5 c877c2706d63b55e00a7834aa6845e34
SHA1 fc8e30ca98d968bfba53059eb818e9f35bf80751
SHA512 6251e93fd7a930b0cf07c73ab706394c85a868aaab3d9bbdac093c49b3b2c1607a8373f280f28ff49da21e849995427cec6f9679c08a316f9a0e15ab1769081e
SSDEEP 49152:IKZ4rB7PYLGp9l0mRQAynFV1zjQHXb82ohVGDUzgplzIX3blFMjIX3rdAG5cy7:I44r1wqXRWAynr1nQHXbXoDGQMHuv8ul
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
4984	is-HMM9N.tmp
4944	PrintFolders.exe
1648	IAaokx.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4984	is-HMM9N.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\unins000.dat	is-HMM9N.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-HMM9N.tmp
File created	C:\Program Files (x86)\PrintFolders\is-U9VBO.tmp	is-HMM9N.tmp
File created	C:\Program Files (x86)\PrintFolders\is-B6B5S.tmp	is-HMM9N.tmp
File created	C:\Program Files (x86)\PrintFolders\is-8PBTQ.tmp	is-HMM9N.tmp
File created	C:\Program Files (x86)\PrintFolders\is-TFJVO.tmp	is-HMM9N.tmp
File created	C:\Program Files (x86)\PrintFolders\is-R4PSO.tmp	is-HMM9N.tmp
File created	C:\Program Files (x86)\PrintFolders\is-37JDV.tmp	is-HMM9N.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-HMM9N.tmp

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
2388	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4944	PrintFolders.exe
4944	PrintFolders.exe
4944	PrintFolders.exe
4944	PrintFolders.exe
4944	PrintFolders.exe
4944	PrintFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4944	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2388	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4736 wrote to memory of 4984	4736	file.exe	79
PID 4736 wrote to memory of 4984	4736	file.exe	79
PID 4736 wrote to memory of 4984	4736	file.exe	79
PID 4984 wrote to memory of 4944	4984	is-HMM9N.tmp	80
PID 4984 wrote to memory of 4944	4984	is-HMM9N.tmp	80
PID 4984 wrote to memory of 4944	4984	is-HMM9N.tmp	80
PID 4944 wrote to memory of 1648	4944	PrintFolders.exe	81
PID 4944 wrote to memory of 1648	4944	PrintFolders.exe	81
PID 4944 wrote to memory of 1648	4944	PrintFolders.exe	81
PID 4944 wrote to memory of 4880	4944	PrintFolders.exe	88
PID 4944 wrote to memory of 4880	4944	PrintFolders.exe	88
PID 4944 wrote to memory of 4880	4944	PrintFolders.exe	88
PID 4880 wrote to memory of 2388	4880	cmd.exe	90
PID 4880 wrote to memory of 2388	4880	cmd.exe	90
PID 4880 wrote to memory of 2388	4880	cmd.exe	90

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4736
- C:\Users\Admin\AppData\Local\Temp\is-0O49O.tmp\is-HMM9N.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-0O49O.tmp\is-HMM9N.tmp" /SL4 $F01DC "C:\Users\Admin\AppData\Local\Temp\file.exe" 1919289 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4984
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:4944
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\IAaokx.exe
      4⤵
      Executes dropped EXE
      PID:1648
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4880
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2388

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 3.3MB
SHA256 58757ed71a74e6f91581c5319c70dc7059ede71f7156b7d43cd8be174624a7bd
MD5 414258418d8bd01a68c49a4c38c59561
SHA1 2aa896c07582c7044dfa06e234c2214b5b8fa440
SHA512 c067246a12984d99e0fed26458fd058e366a4cbc6f9361715fe68b44a3ff1d3b85aac123a87c8df7dace85d33800f2ec24d50168dc8a17753039e3950582fe95
SSDEEP 49152:SEvGdfWjjOccon1RSWQIAHifVZwWUwYBZUryG6zh:jgfEjfDn1RSWQ5HifVZwWuy6zh
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.3MB
SHA256 58757ed71a74e6f91581c5319c70dc7059ede71f7156b7d43cd8be174624a7bd
MD5 414258418d8bd01a68c49a4c38c59561
SHA1 2aa896c07582c7044dfa06e234c2214b5b8fa440
SHA512 c067246a12984d99e0fed26458fd058e366a4cbc6f9361715fe68b44a3ff1d3b85aac123a87c8df7dace85d33800f2ec24d50168dc8a17753039e3950582fe95
SSDEEP 49152:SEvGdfWjjOccon1RSWQIAHifVZwWUwYBZUryG6zh:jgfEjfDn1RSWQ5HifVZwWuy6zh
MD5 SHA1 SHA512 SSDEEP

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is-HMM9N.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-0O49O.tmp\is-HMM9N.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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is-HMM9N.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-0O49O.tmp\is-HMM9N.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-SR20V.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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IAaokx.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\IAaokx.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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IAaokx.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\IAaokx.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/4736-157-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4736-134-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4736-139-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4736-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4944-145-0x0000000000400000-0x0000000001549000-memory.dmp

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memory/4944-144-0x0000000000400000-0x0000000001549000-memory.dmp

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memory/4944-149-0x0000000000400000-0x0000000001549000-memory.dmp

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memory/4944-150-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4944-143-0x0000000000400000-0x0000000001549000-memory.dmp

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memory/4944-155-0x0000000000400000-0x0000000001549000-memory.dmp

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