nymaim | 2ac65a7eed2230024ef2adcad5e27cae05c95ec51fd9e4cda206c1a41bc73b9a

Analysis

max time kernel
91s
max time network
128s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
01/12/2022, 19:00

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General

Target
file.exe
Size 2.2MB
Sample221201-xnsecaag74
SHA256 2ac65a7eed2230024ef2adcad5e27cae05c95ec51fd9e4cda206c1a41bc73b9a
MD5 91ff9e6e9a719d76ec2f1ed07654d221
SHA1 5b253032cce30bbf4a32a0238daaa5bd8fa05659
SHA512 190ec0cb3fb5096603ec854c8b701259987da5db8ff369479b5918aa8ec1a52f1d20fd38a1207fd7fcd31ab3de3b2d8912773bb3a0170c03087b0545ddf8162d
SSDEEP 49152:05VOtc5mv+TDsaB7Cj7e4j7a5SxT1SW7jDDegcA+lNFFrPAG5cyA:05VOtcbUakPe4j7OgToALGZXcyA
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
4804	is-VNLQL.tmp
1028	PrintFolders.exe
2708	QAI4Pg.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4804	is-VNLQL.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-BQJM6.tmp	is-VNLQL.tmp
File created	C:\Program Files (x86)\PrintFolders\is-FU28U.tmp	is-VNLQL.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-VNLQL.tmp
File created	C:\Program Files (x86)\PrintFolders\is-M0Q7R.tmp	is-VNLQL.tmp
File created	C:\Program Files (x86)\PrintFolders\is-MPN9L.tmp	is-VNLQL.tmp
File created	C:\Program Files (x86)\PrintFolders\is-V4TCM.tmp	is-VNLQL.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-VNLQL.tmp
File created	C:\Program Files (x86)\PrintFolders\is-P7GA3.tmp	is-VNLQL.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-VNLQL.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
268	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1028	PrintFolders.exe
1028	PrintFolders.exe
1028	PrintFolders.exe
1028	PrintFolders.exe
1028	PrintFolders.exe
1028	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	268	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4876 wrote to memory of 4804	4876	file.exe	81
PID 4876 wrote to memory of 4804	4876	file.exe	81
PID 4876 wrote to memory of 4804	4876	file.exe	81
PID 4804 wrote to memory of 1028	4804	is-VNLQL.tmp	82
PID 4804 wrote to memory of 1028	4804	is-VNLQL.tmp	82
PID 4804 wrote to memory of 1028	4804	is-VNLQL.tmp	82
PID 1028 wrote to memory of 2708	1028	PrintFolders.exe	83
PID 1028 wrote to memory of 2708	1028	PrintFolders.exe	83
PID 1028 wrote to memory of 2708	1028	PrintFolders.exe	83
PID 1028 wrote to memory of 1856	1028	PrintFolders.exe	86
PID 1028 wrote to memory of 1856	1028	PrintFolders.exe	86
PID 1028 wrote to memory of 1856	1028	PrintFolders.exe	86
PID 1856 wrote to memory of 268	1856	cmd.exe	88
PID 1856 wrote to memory of 268	1856	cmd.exe	88
PID 1856 wrote to memory of 268	1856	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4876
- C:\Users\Admin\AppData\Local\Temp\is-EG4TE.tmp\is-VNLQL.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-EG4TE.tmp\is-VNLQL.tmp" /SL4 $40040 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2086200 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4804
- - 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 use of WriteProcessMemory
    PID:1028
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\QAI4Pg.exe
      4⤵
      Executes dropped EXE
      PID:2708
  - - 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:1856
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:268

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 3.4MB
SHA256 a7e1974a5fd87030b0952400aac91eb5c4adb15f3002649f2e97e8be9db64641
MD5 54283e5a16ea5d5a583a2717a66a1dc4
SHA1 39b970bb12234a59cf664b5bdca15c6c505b1f13
SHA512 a9156fb9e05b2092a3aaa636cf2731072c59bfb1569f5e7476eefd9d1685499fb87e533243e7d12cc88088aa19226727e0e85771f2f1197ec3dc91f95441beea
SSDEEP 49152:uwmY45fzL7mJ9eDX/DJWw/euxhWknUEbarJ:uNY6zWJ9APDJWw2uHWknVGJ
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.4MB
SHA256 a7e1974a5fd87030b0952400aac91eb5c4adb15f3002649f2e97e8be9db64641
MD5 54283e5a16ea5d5a583a2717a66a1dc4
SHA1 39b970bb12234a59cf664b5bdca15c6c505b1f13
SHA512 a9156fb9e05b2092a3aaa636cf2731072c59bfb1569f5e7476eefd9d1685499fb87e533243e7d12cc88088aa19226727e0e85771f2f1197ec3dc91f95441beea
SSDEEP 49152:uwmY45fzL7mJ9eDX/DJWw/euxhWknUEbarJ:uNY6zWJ9APDJWw2uHWknVGJ
MD5 SHA1 SHA512 SSDEEP

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is-VNLQL.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-EG4TE.tmp\is-VNLQL.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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is-VNLQL.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-EG4TE.tmp\is-VNLQL.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-ELU5K.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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QAI4Pg.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\QAI4Pg.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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QAI4Pg.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\QAI4Pg.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/1028-143-0x0000000000400000-0x0000000001567000-memory.dmp

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memory/1028-142-0x0000000000400000-0x0000000001567000-memory.dmp

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memory/1028-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1028-151-0x0000000000400000-0x0000000001567000-memory.dmp

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memory/1028-154-0x0000000000400000-0x0000000001567000-memory.dmp

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memory/4876-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4876-137-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4876-155-0x0000000000400000-0x0000000000413000-memory.dmp

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